Malware analysis Microsoft Teams.exe Malicious activity

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File name:	Microsoft Teams.exe
Full analysis:	https://app.any.run/tasks/8b826a84-2afa-4c4d-9354-9cd750ef22d9
Verdict:	Malicious activity
Analysis date:	May 31, 2025, 05:31:18
OS:	Windows 10 Professional (build: 19044, 64 bit)
Indicators:
MIME:	application/vnd.microsoft.portable-executable
File info:	PE32 executable (console) Intel 80386 Mono/.Net assembly, for MS Windows, 3 sections
MD5:	FA922C27CAFB173E783272BB7A9B80FA
SHA1:	35A42EF727A1A29D2441D3F63CE0EB7EC3C9E30A
SHA256:	4F975B831F7CAA625C8417829547706A09730B0B2A7B8ADF16282C76C5D473F1
SSDEEP:	768:j2XKZq4C444xqqqqqq1qqqqqqIqqqqqqrqqqqqqqdqqqqqq+qqqqqqgqqqqqqCqf:yaZq4C444jnW4QQjUP3NuIqt7k0

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:: off
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
- Executing a file with an untrusted certificate
  - Microsoft Teams.exe (PID: 7680)
SUSPICIOUS
- Process drops legitimate windows executable
  - Microsoft Teams.exe (PID: 7680)
- Starts a Microsoft application from unusual location
  - Microsoft Teams.exe (PID: 7680)
- Reads security settings of Internet Explorer
  - Microsoft Teams.exe (PID: 7680)
INFO
- Reads the computer name
  - Microsoft Teams.exe (PID: 7680)
- Reads the machine GUID from the registry
  - Microsoft Teams.exe (PID: 7680)
- Checks supported languages
  - Microsoft Teams.exe (PID: 7680)
- Reads Environment values
  - Microsoft Teams.exe (PID: 7680)
- Create files in a temporary directory
  - Microsoft Teams.exe (PID: 7680)

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

.dll	\|	Win32 Dynamic Link Library (generic) (43.5)
.exe	\|	Win32 Executable (generic) (29.8)
.exe	\|	Generic Win/DOS Executable (13.2)
.exe	\|	DOS Executable Generic (13.2)

EXIF

EXE

MachineType:	Intel 386 or later, and compatibles
TimeStamp:	2060:04:14 14:05:23+00:00
ImageFileCharacteristics:	Executable, Large address aware
PEType:	PE32
LinkerVersion:	48
CodeSize:	4608
InitializedDataSize:	254976
UninitializedDataSize:	-
EntryPoint:	0x31d2
OSVersion:	4
ImageVersion:	-
SubsystemVersion:	6
Subsystem:	Windows command line
FileVersionNumber:	25094.310.3616.953
ProductVersionNumber:	25094.310.3616.953
FileFlagsMask:	0x003f
FileFlags:	(none)
FileOS:	Win32
ObjectFileType:	Executable application
FileSubtype:	-
LanguageCode:	Neutral
CharacterSet:	Unicode
Comments:	Microsoft Teams
CompanyName:	Microsoft Corporation
FileDescription:	ms-teams.exe
FileVersion:	25094.310.3616.953
InternalName:	CajaTrux.exe
LegalCopyright:	© Microsoft Corporation 2024-2025
LegalTrademarks:	-
OriginalFileName:	CajaTrux.exe
ProductName:	Microsoft Teams
ProductVersion:	25094.310.3616.953
AssemblyVersion:	25094.310.3616.953

No data.

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All screenshots are available in the full report

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Total processes

129

Monitored processes

Malicious processes

Suspicious processes

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

644

C:\WINDOWS\System32\slui.exe -Embedding

C:\Windows\System32\slui.exe

—

svchost.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Windows Activation Client

Version:

10.0.19041.1 (WinBuild.160101.0800)

Modules

Images
c:\windows\system32\slui.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.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
c:\windows\system32\user32.dll

7680

"C:\Users\admin\AppData\Local\Temp\Microsoft Teams.exe"

C:\Users\admin\AppData\Local\Temp\Microsoft Teams.exe

—

explorer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

ms-teams.exe

Exit code:

Version:

25094.310.3616.953

Modules

Images
c:\users\admin\appdata\local\temp\microsoft teams.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\mscoree.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll

7796

\??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1

C:\Windows\System32\conhost.exe

—

Microsoft Teams.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Console Window Host

Exit code:

Version:

10.0.19041.1 (WinBuild.160101.0800)

Modules

Images
c:\windows\system32\conhost.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcp_win.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\shcore.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\combase.dll
c:\windows\system32\rpcrt4.dll

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Total events

1 376

Read events

1 376

Write events

Delete events

Modification events

No data

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
7680	Microsoft Teams.exe	C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_dkf4a3mm.jyd.psm1		text
		MD5:D17FE0A3F47BE24A6453E9EF58C94641	SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7
7680	Microsoft Teams.exe	C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_nyn0edqf.z42.ps1		text
		MD5:D17FE0A3F47BE24A6453E9EF58C94641	SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7

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
—	—	GET	200	2.23.181.156:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
6544	svchost.exe	GET	200	2.17.190.73:80	http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D	unknown	—	—	whitelisted
5496	MoUsoCoreWorker.exe	GET	200	2.20.245.139:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
5760	SIHClient.exe	GET	200	2.23.181.156:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl	unknown	—	—	whitelisted
5760	SIHClient.exe	GET	200	2.23.181.156:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl	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	192.168.100.255:137	—	—	—	whitelisted
6544	svchost.exe	40.126.31.73:443	login.live.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
—	—	40.127.240.158:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
5496	MoUsoCoreWorker.exe	2.20.245.139:80	crl.microsoft.com	Akamai International B.V.	SE	whitelisted
—	—	2.23.181.156:80	www.microsoft.com	AKAMAI-AS	DE	whitelisted
4	System	192.168.100.255:138	—	—	—	whitelisted
6544	svchost.exe	20.190.159.23:443	login.live.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
6544	svchost.exe	2.17.190.73:80	ocsp.digicert.com	AKAMAI-AS	DE	whitelisted
6564	svchost.exe	4.231.128.59:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
5496	MoUsoCoreWorker.exe	4.231.128.59:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted

DNS requests

Domain	IP	Reputation
login.live.com	40.126.31.73 20.190.159.23 40.126.31.130 20.190.159.130 20.190.159.2 20.190.159.128 20.190.159.0 20.190.159.71	whitelisted
settings-win.data.microsoft.com	40.127.240.158 4.231.128.59	whitelisted
crl.microsoft.com	2.20.245.139 2.20.245.137	whitelisted
www.microsoft.com	2.23.181.156	whitelisted
google.com	172.217.16.206	whitelisted
ocsp.digicert.com	2.17.190.73	whitelisted
client.wns.windows.com	172.211.123.248	whitelisted
slscr.update.microsoft.com	52.149.20.212	whitelisted
fe3cr.delivery.mp.microsoft.com	13.85.23.206	whitelisted
activation-v2.sls.microsoft.com	—	whitelisted

Threats

No threats detected

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No debug info

General Info

Microsoft Teams.exe

FA922C27CAFB173E783272BB7A9B80FA

35A42EF727A1A29D2441D3F63CE0EB7EC3C9E30A

4F975B831F7CAA625C8417829547706A09730B0B2A7B8ADF16282C76C5D473F1

768:j2XKZq4C444xqqqqqq1qqqqqqIqqqqqqrqqqqqqqdqqqqqq+qqqqqqgqqqqqqCqf:yaZq4C444jnW4QQjUP3NuIqt7k0

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

Executing a file with an untrusted certificate

SUSPICIOUS

Process drops legitimate windows executable

Starts a Microsoft application from unusual location

Reads security settings of Internet Explorer

INFO

Reads the computer name

Reads the machine GUID from the registry

Checks supported languages

Reads Environment values

Create files in a temporary directory

Malware configuration

Static information

TRiD

EXIF

EXE

Video and screenshots

Processes

Behavior graph

Specs description

Process information

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