Malware analysis b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d Malicious activity

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File name:	b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d
Full analysis:	https://app.any.run/tasks/0865d5c1-eb4b-46ed-8371-6289f52c4bf4
Verdict:	Malicious activity
Analysis date:	April 29, 2025, 15:46:12
OS:	Windows 10 Professional (build: 19044, 64 bit)
Tags:	tofsee
Indicators:
MIME:	application/vnd.microsoft.portable-executable
File info:	PE32 executable (GUI) Intel 80386, for MS Windows, 4 sections
MD5:	F4F65A8F15B97F4B5A5B5E5C86CC2A09
SHA1:	62ED08D6E197ECFBE748C57BF4FB15D9A1F27532
SHA256:	B31A2A5538316B35911B2FD1CC1ED8745EAF9B9A382235210ED16CBA9F1A486D
SSDEEP:	12288:LG0jYEn/bcTPru/0wUazzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzH:NRqP40j

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
- Changes the autorun value in the registry
  - b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe (PID: 7400)
- TOFSEE has been detected (YARA)
  - svchost.exe (PID: 7784)
SUSPICIOUS
- Reads security settings of Internet Explorer
  - b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe (PID: 7400)
- Executable content was dropped or overwritten
  - b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe (PID: 7400)
- Executes application which crashes
  - b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe (PID: 7400)
  - uuvgbcai.exe (PID: 7604)
- Detected use of alternative data streams (AltDS)
  - svchost.exe (PID: 7784)
- Connects to SMTP port
  - svchost.exe (PID: 7784)
INFO
- Checks supported languages
  - b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe (PID: 7400)
  - uuvgbcai.exe (PID: 7604)
- Create files in a temporary directory
  - b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe (PID: 7400)
  - uuvgbcai.exe (PID: 7604)
- Reads the computer name
  - b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe (PID: 7400)
  - uuvgbcai.exe (PID: 7604)
- Process checks computer location settings
  - b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe (PID: 7400)

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

.exe	\|	Win32 Executable MS Visual C++ (generic) (42.2)
.exe	\|	Win64 Executable (generic) (37.3)
.dll	\|	Win32 Dynamic Link Library (generic) (8.8)
.exe	\|	Win32 Executable (generic) (6)
.exe	\|	Generic Win/DOS Executable (2.7)

EXIF

EXE

MachineType:	Intel 386 or later, and compatibles
TimeStamp:	2019:12:02 02:19:48+00:00
ImageFileCharacteristics:	No relocs, Executable, 32-bit
PEType:	PE32
LinkerVersion:	9
CodeSize:	227328
InitializedDataSize:	45661696
UninitializedDataSize:	-
EntryPoint:	0x2b06
OSVersion:	5
ImageVersion:	-
SubsystemVersion:	5
Subsystem:	Windows GUI

No data.

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All screenshots are available in the full report

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Total processes

143

Monitored processes

Malicious processes

Suspicious processes

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

7400

"C:\Users\admin\AppData\Local\Temp\b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe"

C:\Users\admin\AppData\Local\Temp\b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe

explorer.exe

User:

admin

Integrity Level:

MEDIUM

Exit code:

3221225477

Modules

Images
c:\users\admin\appdata\local\temp\b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.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\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll
c:\windows\syswow64\advapi32.dll

7484

"C:\Windows\System32\wusa.exe"

C:\Windows\SysWOW64\wusa.exe

—

b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Windows Update Standalone Installer

Exit code:

3221226540

Version:

10.0.19041.3636 (WinBuild.160101.0800)

Modules

Images
c:\windows\syswow64\wusa.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll

7580

"C:\WINDOWS\SysWOW64\wusa.exe"

C:\Windows\SysWOW64\wusa.exe

b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

HIGH

Description:

Windows Update Standalone Installer

Exit code:

Version:

10.0.19041.3636 (WinBuild.160101.0800)

Modules

Images
c:\windows\syswow64\wusa.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\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll
c:\windows\syswow64\advapi32.dll

7604

"C:\Users\admin\uuvgbcai.exe" /d"C:\Users\admin\AppData\Local\Temp\b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe" /e550302100000007F

C:\Users\admin\uuvgbcai.exe

b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe

User:

admin

Integrity Level:

MEDIUM

Exit code:

3221225477

Modules

Images
c:\users\admin\uuvgbcai.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\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll
c:\windows\syswow64\advapi32.dll

7684

C:\WINDOWS\SysWOW64\WerFault.exe -u -p 7400 -s 1288

C:\Windows\SysWOW64\WerFault.exe

—

b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Windows Problem Reporting

Exit code:

Version:

10.0.19041.3996 (WinBuild.160101.0800)

Modules

Images
c:\windows\syswow64\werfault.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\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\msvcrt.dll
c:\windows\syswow64\combase.dll

7716

C:\WINDOWS\system32\SppExtComObj.exe -Embedding

C:\Windows\System32\SppExtComObj.Exe

—

svchost.exe

User:

NETWORK SERVICE

Company:

Microsoft Corporation

Integrity Level:

SYSTEM

Description:

KMS Connection Broker

Version:

10.0.19041.3996 (WinBuild.160101.0800)

Modules

Images
c:\windows\system32\sppextcomobj.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\oleaut32.dll

7748

"C:\WINDOWS\System32\SLUI.exe" RuleId=3482d82e-ca2c-4e1f-8864-da0267b484b2;Action=AutoActivate;AppId=55c92734-d682-4d71-983e-d6ec3f16059f;SkuId=4de7cb65-cdf1-4de9-8ae8-e3cce27b9f2c;NotificationInterval=1440;Trigger=TimerEvent

C:\Windows\System32\slui.exe

—

SppExtComObj.Exe

User:

NETWORK SERVICE

Company:

Microsoft Corporation

Integrity Level:

SYSTEM

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

7784

svchost.exe

C:\Windows\SysWOW64\svchost.exe

uuvgbcai.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Host Process for Windows Services

Version:

10.0.19041.1 (WinBuild.160101.0800)

Modules

Images
c:\windows\syswow64\svchost.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\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll
c:\windows\syswow64\ws2_32.dll

7848

C:\WINDOWS\SysWOW64\WerFault.exe -u -p 7604 -s 576

C:\Windows\SysWOW64\WerFault.exe

—

uuvgbcai.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Windows Problem Reporting

Exit code:

Version:

10.0.19041.3996 (WinBuild.160101.0800)

Modules

Images
c:\windows\syswow64\werfault.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\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\msvcrt.dll
c:\windows\syswow64\combase.dll

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Total events

1 407

Read events

1 406

Write events

Delete events

Modification events


(PID) Process:	(7400) b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Operation:	write	Name:	tudcsewn
Value: "C:\Users\admin\uuvgbcai.exe"

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
7400	b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe	C:\Users\admin\uuvgbcai.exe		executable
		MD5:4620B9321C388EC00C1C36C3E9571F74	SHA256:688F9AC0EC816F189D6CDEEF22B1A8859B0D03A646254AEF3377DFF84BC63B3F
7400	b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d.exe	C:\Users\admin\AppData\Local\Temp\kbxevuyc.exe		executable
		MD5:371AECE917FA63D8BBC77A3BC36BFC8F	SHA256:DE32CA8C4E7F8DE9347E701FA839D81B0AF2D53DF47CA265CB235D1F40B94E47

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
5496	MoUsoCoreWorker.exe	GET	200	23.53.40.178:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
—	—	GET	200	23.53.40.178:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
5496	MoUsoCoreWorker.exe	GET	200	2.23.246.101:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
6132	SIHClient.exe	GET	200	23.219.150.101:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl	unknown	—	—	whitelisted
6132	SIHClient.exe	GET	200	23.219.150.101:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.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
6724	RUXIMICS.exe	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
—	—	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
4	System	192.168.100.255:138	—	—	—	whitelisted
5496	MoUsoCoreWorker.exe	23.53.40.178:80	crl.microsoft.com	Akamai International B.V.	DE	whitelisted
—	—	23.53.40.178:80	crl.microsoft.com	Akamai International B.V.	DE	whitelisted
5496	MoUsoCoreWorker.exe	2.23.246.101:80	www.microsoft.com	Ooredoo Q.S.C.	QA	whitelisted
7784	svchost.exe	13.107.246.59:80	microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	US	whitelisted
7784	svchost.exe	52.101.41.54:25	microsoft-com.mail.protection.outlook.com	MICROSOFT-CORP-MSN-AS-BLOCK	US	whitelisted
7784	svchost.exe	43.231.4.7:443	—	Gigabit Hosting Sdn Bhd	MY	unknown

DNS requests

Domain	IP	Reputation
settings-win.data.microsoft.com	51.104.136.2 51.124.78.146	whitelisted
google.com	142.250.185.142	whitelisted
crl.microsoft.com	23.53.40.178 23.53.40.176	whitelisted
www.microsoft.com	2.23.246.101 23.219.150.101	whitelisted
microsoft.com	13.107.246.59	whitelisted
microsoft-com.mail.protection.outlook.com	52.101.41.54 52.101.8.36 52.101.194.12 52.101.10.14	whitelisted
client.wns.windows.com	172.211.123.248	whitelisted
slscr.update.microsoft.com	20.12.23.50	whitelisted
fe3cr.delivery.mp.microsoft.com	40.69.42.241	whitelisted
yahoo.com	—	whitelisted

Threats

No threats detected

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No debug info

General Info

b31a2a5538316b35911b2fd1cc1ed8745eaf9b9a382235210ed16cba9f1a486d

F4F65A8F15B97F4B5A5B5E5C86CC2A09

62ED08D6E197ECFBE748C57BF4FB15D9A1F27532

B31A2A5538316B35911B2FD1CC1ED8745EAF9B9A382235210ED16CBA9F1A486D

12288:LG0jYEn/bcTPru/0wUazzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzH:NRqP40j

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

Changes the autorun value in the registry

TOFSEE has been detected (YARA)

SUSPICIOUS

Reads security settings of Internet Explorer

Executable content was dropped or overwritten

Executes application which crashes

Detected use of alternative data streams (AltDS)

Connects to SMTP port

INFO

Checks supported languages

Create files in a temporary directory

Reads the computer name

Process checks computer location settings

Malware configuration

Static information

TRiD

EXIF

EXE

Video and screenshots

Processes

Behavior graph

Specs description

Process information

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Information

Modules

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