Malware analysis POC-CVE-2023-21716.rtf Malicious activity

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File name:	POC-CVE-2023-21716.rtf
Full analysis:	https://app.any.run/tasks/96ed450b-b642-48fd-918c-f0ade868332e
Verdict:	Malicious activity
Analysis date:	January 01, 2025, 11:59:19
OS:	Windows 10 Professional (build: 19045, 64 bit)
Indicators:
MIME:	text/rtf
File info:	Rich Text Format data, version 1
MD5:	D1E8C1498D56E7DA0E8FC0671B5AB2B5
SHA1:	8276FACC6EF40DF6385DD3DD49E41848228C7735
SHA256:	ACF196F673746A742CC77AB864E0A81C2AC85200BC33EE27543E7D4C257ECDEA
SSDEEP:	3072:2S3COPNhY0WulaBX+g3iXHfEPsOMf0ReLwtKnMht197h5IbS9MP2BwxPSmqO5G5/:r/Z1Od5IbS9MP2BGfBrDBPZvzjZU1

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.

Launch configuration

Task duration:: 60 seconds
Heavy Evasion option:
Network geolocation:: off
Additional time used:: none
MITM proxy:: off
Privacy:: Public submission
Fakenet option:: off
Route via Tor:: off
Autoconfirmation of UAC:: on
Network:: on

Software preset

Internet Explorer 11.3636.19041.0
Adobe Acrobat (64-bit) (23.001.20093)
Adobe Flash Player 32 NPAPI (32.0.0.465)
Adobe Flash Player 32 PPAPI (32.0.0.465)
CCleaner (6.20)
FileZilla 3.65.0 (3.65.0)
Google Chrome (122.0.6261.70)
Google Update Helper (1.3.36.51)
Java 8 Update 271 (64-bit) (8.0.2710.9)
Java Auto Updater (2.8.271.9)
Microsoft Edge (122.0.2365.59)
Microsoft Edge Update (1.3.185.17)
Microsoft Office Professional 2019 - de-de (16.0.16026.20146)
Microsoft Office Professional 2019 - en-us (16.0.16026.20146)
Microsoft Office Professional 2019 - es-es (16.0.16026.20146)
Microsoft Office Professional 2019 - it-it (16.0.16026.20146)
Microsoft Office Professional 2019 - ja-jp (16.0.16026.20146)
Microsoft Office Professional 2019 - ko-kr (16.0.16026.20146)
Microsoft Office Professional 2019 - pt-br (16.0.16026.20146)
Microsoft Office Professional 2019 - tr-tr (16.0.16026.20146)
Microsoft Office Professionnel 2019 - fr-fr (16.0.16026.20146)
Microsoft Office профессиональный 2019 - ru-ru (16.0.16026.20146)
Microsoft OneNote - en-us (16.0.16026.20146)
Microsoft Update Health Tools (3.74.0.0)
Microsoft Visual C++ 2013 Redistributable (x64) - 12.0.30501 (12.0.30501.0)
Microsoft Visual C++ 2013 x64 Additional Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2013 x64 Minimum Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2015-2022 Redistributable (x64) - 14.36.32532 (14.36.32532.0)
Microsoft Visual C++ 2015-2022 Redistributable (x86) - 14.36.32532 (14.36.32532.0)
Microsoft Visual C++ 2022 X64 Additional Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X64 Minimum Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X86 Additional Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X86 Minimum Runtime - 14.36.32532 (14.36.32532)
Mozilla Firefox (x64 en-US) (123.0)
Mozilla Maintenance Service (123.0)
Notepad++ (64-bit x64) (7.9.1)
Office 16 Click-to-Run Extensibility Component (16.0.15726.20202)
Office 16 Click-to-Run Licensing Component (16.0.16026.20146)
Office 16 Click-to-Run Localization Component (16.0.15726.20202)
Office 16 Click-to-Run Localization Component (16.0.15928.20198)
PowerShell 7-x64 (7.3.5.0)
Skype version 8.104 (8.104)
Update for Windows 10 for x64-based Systems (KB4023057) (2.59.0.0)
Update for Windows 10 for x64-based Systems (KB4023057) (2.63.0.0)
Update for Windows 10 for x64-based Systems (KB4480730) (2.55.0.0)
Update for Windows 10 for x64-based Systems (KB5001716) (8.93.0.0)
VLC media player (3.0.11)
WinRAR 5.91 (64-bit) (5.91.0)
Windows PC Health Check (3.6.2204.08001)

Hotfixes

Client LanguagePack Package
DotNetRollup
DotNetRollup 481
FodMetadata Package
Foundation Package
Hello Face Package
InternetExplorer Optional Package
KB5003791
KB5011048
KB5015684
KB5033052
LanguageFeatures Basic en us Package
LanguageFeatures Handwriting en us Package
LanguageFeatures OCR en us Package
LanguageFeatures Speech en us Package
LanguageFeatures TextToSpeech en us Package
MSPaint FoD Package
MediaPlayer Package
Microsoft OneCore ApplicationModel Sync Desktop FOD Package
Microsoft OneCore DirectX Database FOD Package
NetFx3 OnDemand Package
Notepad FoD Package
OpenSSH Client Package
PowerShell ISE FOD Package
Printing PMCPPC FoD Package
Printing WFS FoD Package
ProfessionalEdition
QuickAssist Package
RollupFix
ServicingStack
ServicingStack 3989
StepsRecorder Package
TabletPCMath Package
UserExperience Desktop Package
WordPad FoD Package

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MALICIOUS
- Unusual execution from MS Office
  - WINWORD.EXE (PID: 6348)
SUSPICIOUS
- Executes application which crashes
  - WINWORD.EXE (PID: 6348)
INFO
- The process uses the downloaded file
  - WINWORD.EXE (PID: 6348)
- Checks proxy server information
  - WerFault.exe (PID: 7032)
- Checks supported languages
  - SearchApp.exe (PID: 5064)
- Creates files or folders in the user directory
  - WerFault.exe (PID: 7032)
- Reads Microsoft Office registry keys
  - WerFault.exe (PID: 7032)
- Reads the software policy settings
  - WerFault.exe (PID: 7032)
  - SearchApp.exe (PID: 5064)
- Reads the machine GUID from the registry
  - SearchApp.exe (PID: 5064)
- Manual execution by a user
  - WINWORD.EXE (PID: 6220)
- Process checks computer location settings
  - SearchApp.exe (PID: 5064)

Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report

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No Malware configuration.

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TRiD

.rtf	\|	Rich Text Format (100)

No data.

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All screenshots are available in the full report

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Total processes

134

Monitored processes

Malicious processes

Suspicious processes

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

5064

"C:\WINDOWS\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca

C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe

svchost.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

LOW

Description:

Search application

Version:

10.0.19041.3996 (WinBuild.160101.0800)

Modules

Images
c:\windows\systemapps\microsoft.windows.search_cw5n1h2txyewy\searchapp.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\msvcp_win.dll
c:\windows\system32\shcore.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\combase.dll
c:\windows\system32\rpcrt4.dll

6220

"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\admin\Desktop\POC-CVE-2023-21716.rtf" /o ""

C:\Program Files\Microsoft Office\root\Office16\WINWORD.EXE

—

explorer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Microsoft Word

Version:

16.0.16026.20146

Modules

Images
c:\program files\microsoft office\root\office16\winword.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll

6348

"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n C:\Users\admin\AppData\Local\Temp\POC-CVE-2023-21716.rtf /o ""

C:\Program Files\Microsoft Office\root\Office16\WINWORD.EXE

explorer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Microsoft Word

Exit code:

255

Version:

16.0.16026.20146

Modules

Images
c:\program files\microsoft office\root\office16\winword.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll

7032

C:\WINDOWS\system32\WerFault.exe -u -p 6348 -s 3444

C:\Windows\System32\WerFault.exe

WINWORD.EXE

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Windows Problem Reporting

Exit code:

Version:

10.0.19041.1 (WinBuild.160101.0800)

Modules

Images
c:\windows\system32\werfault.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\combase.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\cryptsp.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\oleaut32.dll

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Total events

11 124

Read events

10 842

Write events

270

Delete events

Modification events


(PID) Process:	(6348) WINWORD.EXE	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\Common\ClientTelemetry\Sampling
Operation:	write	Name:	0
Value: 017012000000001000B24E9A3E02000000000000000600000000000000
(PID) Process:	(6348) WINWORD.EXE	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\Common\CrashPersistence\WINWORD\6348
Operation:	write	Name:	0
Value: 0B0E10F3A5AB37CA44734E9C15B406366943B5230046C290C5D8C988D7ED016A04102400449A7D64B29D01008500A907556E6B6E6F776EC906022222CA0DC2190000C91003783634C511CC31D2120B770069006E0077006F00720064002E00650078006500C51620C517808004C91808323231322D44656300
(PID) Process:	(6348) WINWORD.EXE	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\LanguageResources\EnabledEditingLanguages
Operation:	write	Name:	en-US
Value: 2
(PID) Process:	(6348) WINWORD.EXE	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\LanguageResources\EnabledEditingLanguages
Operation:	write	Name:	de-de
Value: 2
(PID) Process:	(6348) WINWORD.EXE	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\LanguageResources\EnabledEditingLanguages
Operation:	write	Name:	fr-fr
Value: 2
(PID) Process:	(6348) WINWORD.EXE	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\LanguageResources\EnabledEditingLanguages
Operation:	write	Name:	es-es
Value: 2
(PID) Process:	(6348) WINWORD.EXE	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\LanguageResources\EnabledEditingLanguages
Operation:	write	Name:	it-it
Value: 2
(PID) Process:	(6348) WINWORD.EXE	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\LanguageResources\EnabledEditingLanguages
Operation:	write	Name:	ja-jp
Value: 2
(PID) Process:	(6348) WINWORD.EXE	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\LanguageResources\EnabledEditingLanguages
Operation:	write	Name:	ko-kr
Value: 2
(PID) Process:	(6348) WINWORD.EXE	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\LanguageResources\EnabledEditingLanguages
Operation:	write	Name:	pt-br
Value: 2

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
7032	WerFault.exe	C:\Users\admin\AppData\Local\CrashDumps\WINWORD.EXE.6348.dmp		—
		MD5:—	SHA256:—
7032	WerFault.exe	C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_WINWORD.EXE_7d193f321d3dfd097d07787288fc64eb44a20f_0c83796a_6d9177f2-2521-49be-ac13-0da91139b7ec\Report.wer		—
		MD5:—	SHA256:—
6348	WINWORD.EXE	C:\Users\admin\AppData\Local\Microsoft\TokenBroker\Cache\089d66ba04a8cec4bdc5267f42f39cf84278bb67.tbres		binary
		MD5:5C21630AB2C67A0399BDAB0C9339B5D0	SHA256:5062F00045899520D39CAE9EDC8C80D5153C9BDD368BDFD39D7F381C2B442CEA
5064	SearchApp.exe	C:\Users\admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\ZWUI0EBX\www.bing[1].xml		text
		MD5:99C5928166DE24E6D012178D4B92AC15	SHA256:DAC3357E969F6EED7EAAB9396661EB7BD5E74B70539A739E9F740D3CCB727822
7032	WerFault.exe	C:\ProgramData\Microsoft\Windows\WER\Temp\WER6F57.tmp.dmp		dmp
		MD5:9884BB9570174D28B2AC76F9FD48009E	SHA256:602D22D0BF9C88B260A6AB28F95A18D4CE0A92B16F78CA26184AF36DA8D55C96
6348	WINWORD.EXE	C:\Users\admin\AppData\Local\Microsoft\TokenBroker\Cache\56a61aeb75d8f5be186c26607f4bb213abe7c5ec.tbres		binary
		MD5:7EFA0FCC97E37FB9305F59A277F1DB11	SHA256:CAA1EAE0658A7206FC4C7C566B27939739CF00540758DFC08E321E7CEC257E70
7032	WerFault.exe	C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\37C951188967C8EB88D99893D9D191FE		der
		MD5:FA84E4BCC92AA5DB735AB50711040CDE	SHA256:6D7205E794FDE4219A62D9692ECDDF612663A5CF20399E79BE87B851FCA4CA33
5064	SearchApp.exe	C:\Users\admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{002807ef-fdd3-40aa-8947-30813f3e75c0}\0.0.filtertrie.intermediate.txt		text
		MD5:313FB75B427790D01342FE144D9C3C06	SHA256:50DBBA1A26C02E1C1B831C474708E68C9B11E3FCF6B254AE908A2C3007D88100
7032	WerFault.exe	C:\ProgramData\Microsoft\Windows\WER\Temp\WER72F2.tmp.WERInternalMetadata.xml		xml
		MD5:83268E5D1A33B567E8ECBEE86D55D645	SHA256:04BD774EBA9B718F24B5BA0477916E14AB143E97E8F02222A817E75546DD9561
6348	WINWORD.EXE	C:\Users\admin\AppData\Local\Microsoft\Office\16.0\WebServiceCache\AllUsers\officeclient.microsoft.com\825A1125-C003-4674-8809-DE19D19A0875		xml
		MD5:C53748513B59A55008FBA8667D953E8F	SHA256:BAE4A018AF9E0F2C6E0ACF9FD73C4870A5BADDF9CAD0A638E9E60F9DE4F918F9

Download PCAP, analyze network streams, HTTP content and a lot more at the full report

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HTTP(S) requests

TCP/UDP connections

DNS requests

Threats

HTTP requests

PID	Process	Method	HTTP Code	IP	URL	CN	Type	Size	Reputation
4712	MoUsoCoreWorker.exe	GET	200	2.16.164.113:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
—	—	GET	200	2.16.164.113:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
5064	SearchApp.exe	GET	200	192.229.221.95:80	http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTrjrydRyt%2BApF3GSPypfHBxR5XtQQUs9tIpPmhxdiuNkHMEWNpYim8S8YCEAI5PUjXAkJafLQcAAsO18o%3D	unknown	—	—	whitelisted
—	—	GET	200	88.221.169.152:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
4712	MoUsoCoreWorker.exe	GET	200	88.221.169.152:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
7032	WerFault.exe	GET	200	2.16.164.16:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
7032	WerFault.exe	GET	200	88.221.169.152:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
1176	svchost.exe	GET	200	192.229.221.95:80	http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D	unknown	—	—	whitelisted
5888	SIHClient.exe	GET	200	88.221.169.152:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl	unknown	—	—	whitelisted
5064	SearchApp.exe	GET	200	192.229.221.95:80	http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEA77flR%2B3w%2FxBpruV2lte6A%3D	unknown	—	—	whitelisted

Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID	Process	IP	Domain	ASN	CN	Reputation
4	System	192.168.100.255:138	—	—	—	whitelisted
—	—	20.73.194.208:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	NL	unknown
5064	SearchApp.exe	2.23.209.182:443	www.bing.com	Akamai International B.V.	GB	whitelisted
5064	SearchApp.exe	192.229.221.95:80	ocsp.digicert.com	EDGECAST	US	whitelisted
4712	MoUsoCoreWorker.exe	2.16.164.113:80	crl.microsoft.com	Akamai International B.V.	NL	whitelisted
—	—	2.16.164.113:80	crl.microsoft.com	Akamai International B.V.	NL	whitelisted
4712	MoUsoCoreWorker.exe	88.221.169.152:80	www.microsoft.com	AKAMAI-AS	DE	whitelisted
—	—	88.221.169.152:80	www.microsoft.com	AKAMAI-AS	DE	whitelisted
6348	WINWORD.EXE	52.109.76.240:443	officeclient.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
6348	WINWORD.EXE	52.113.194.132:443	ecs.office.com	MICROSOFT-CORP-MSN-AS-BLOCK	US	whitelisted

DNS requests

Domain	IP	Reputation
settings-win.data.microsoft.com	20.73.194.208 4.231.128.59	whitelisted
www.bing.com	2.23.209.182 2.23.209.149 2.23.209.187 2.23.209.140 2.23.209.165 2.23.209.133	whitelisted
ocsp.digicert.com	192.229.221.95	whitelisted
crl.microsoft.com	2.16.164.113 2.16.164.112 2.16.164.16 2.16.164.130 2.16.164.34 2.16.164.72 2.16.164.115 2.16.164.81 2.16.164.67 2.16.164.90	whitelisted
google.com	142.250.184.206	whitelisted
www.microsoft.com	88.221.169.152	whitelisted
officeclient.microsoft.com	52.109.76.240	whitelisted
ecs.office.com	52.113.194.132	whitelisted
omex.cdn.office.net	2.16.168.119 2.16.168.101	whitelisted
watson.events.data.microsoft.com	20.189.173.20	whitelisted

Threats

No threats detected

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No debug info

General Info

POC-CVE-2023-21716.rtf

D1E8C1498D56E7DA0E8FC0671B5AB2B5

8276FACC6EF40DF6385DD3DD49E41848228C7735

ACF196F673746A742CC77AB864E0A81C2AC85200BC33EE27543E7D4C257ECDEA

3072:2S3COPNhY0WulaBX+g3iXHfEPsOMf0ReLwtKnMht197h5IbS9MP2BwxPSmqO5G5/:r/Z1Od5IbS9MP2BGfBrDBPZvzjZU1

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

Unusual execution from MS Office

SUSPICIOUS

Executes application which crashes

INFO

The process uses the downloaded file

Checks proxy server information

Checks supported languages

Creates files or folders in the user directory

Reads Microsoft Office registry keys

Reads the software policy settings

Reads the machine GUID from the registry

Manual execution by a user

Process checks computer location settings

Malware configuration

Static information

TRiD

Video and screenshots

Processes

Behavior graph

Specs description

Process information

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Registry activity

Modification events

Files activity

Dropped files

Network activity

HTTP requests

Connections

DNS requests

Threats

Debug output strings