Malware analysis 66d5e40f57b39_def_20240902191245.exe Malicious activity

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File name:	66d5e40f57b39_def_20240902191245.exe
Full analysis:	https://app.any.run/tasks/bc756c59-5b04-4dea-a9f7-b330c13298e3
Verdict:	Malicious activity
Threats:	Stealc is a stealer malware that targets victims’ sensitive data, which it exfiltrates from browsers, messaging apps, and other software. The malware is equipped with advanced features, including fingerprinting, control panel, evasion mechanisms, string obfuscation, etc. Stealc establishes persistence and communicates with its C2 server through HTTP POST requests. Stealc ist eine Stealer-Malware, die es auf die sensiblen Daten der Opfer abgesehen hat, die sie aus Browsern, Messaging-Apps und anderer Software exfiltriert. Die Malware ist mit fortschrittlichen Funktionen ausgestattet, darunter Fingerprinting, Bedienfeld, Umgehungsmechanismen, String-Verschleierung usw. Stealc stellt eine Persistenz her und kommuniziert mit seinem C2-Server über HTTP-POST-Anfragen. Stealers are a group of malicious software that are intended for gaining unauthorized access to users’ information and transferring it to the attacker. The stealer malware category includes various types of programs that focus on their particular kind of data, including files, passwords, and cryptocurrency. Stealers are capable of spying on their targets by recording their keystrokes and taking screenshots. This type of malware is primarily distributed as part of phishing campaigns. Malware Trends Tracker >>>
Analysis date:	October 07, 2024, 19:12:15
OS:	Windows 10 Professional (build: 19045, 64 bit)
Tags:	stealc stealer
Indicators:
MIME:	application/x-dosexec
File info:	PE32 executable (console) Intel 80386 Mono/.Net assembly, for MS Windows
MD5:	ADE16B249DE80C5D8A459BAAAC67201C
SHA1:	8C795C6C18B99B90D23128413147A160CE0CA78C
SHA256:	F70AF1EA3E7EE9AF7E45F56D107C95F5CED56D0811F1A6F30C936CA7A0175A3D
SSDEEP:	6144:FMfyRlnrinw1bimhKrckETwxaSsBB2hvhGra7enCci:+K6nwY8SckEkaxM5kaf

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:: on
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
- StealC has been detected
  - RegAsm.exe (PID: 6652)
SUSPICIOUS
- Process drops legitimate windows executable
  - 66d5e40f57b39_def_20240902191245.exe (PID: 5468)
- Windows Defender mutex has been found
  - RegAsm.exe (PID: 6652)
- Starts a Microsoft application from unusual location
  - 66d5e40f57b39_def_20240902191245.exe (PID: 5468)
INFO
- Reads the computer name
  - 66d5e40f57b39_def_20240902191245.exe (PID: 5468)
  - RegAsm.exe (PID: 6652)
- Checks supported languages
  - 66d5e40f57b39_def_20240902191245.exe (PID: 5468)
  - RegAsm.exe (PID: 6652)

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:	2024:09:02 15:33:01+00:00
ImageFileCharacteristics:	Executable, 32-bit
PEType:	PE32
LinkerVersion:	11
CodeSize:	198144
InitializedDataSize:	2560
UninitializedDataSize:	-
EntryPoint:	0x325ee
OSVersion:	4
ImageVersion:	-
SubsystemVersion:	6
Subsystem:	Windows command line
FileVersionNumber:	10.0.19041.1
ProductVersionNumber:	10.0.19041.1
FileFlagsMask:	0x003f
FileFlags:	(none)
FileOS:	Windows NT 32-bit
ObjectFileType:	Executable application
FileSubtype:	-
LanguageCode:	English (U.S.)
CharacterSet:	Unicode
CompanyName:	Microsoft Corporation
FileDescription:	Security Init
FileVersion:	10.0.19041.1 (WinBuild.160101.0800)
InternalName:	secinit
LegalCopyright:	© Microsoft Corporation. All rights reserved.
OriginalFileName:	secinit
ProductName:	Microsoft® Windows® Operating System
ProductVersion:	10.0.19041.1

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

3980

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

C:\Windows\System32\conhost.exe

—

66d5e40f57b39_def_20240902191245.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

5468

"C:\Users\admin\Desktop\66d5e40f57b39_def_20240902191245.exe"

C:\Users\admin\Desktop\66d5e40f57b39_def_20240902191245.exe

—

explorer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Security Init

Exit code:

Version:

10.0.19041.1 (WinBuild.160101.0800)

Modules

Images
c:\users\admin\desktop\66d5e40f57b39_def_20240902191245.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

6652

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

66d5e40f57b39_def_20240902191245.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Microsoft .NET Assembly Registration Utility

Exit code:

Version:

4.8.9037.0 built by: NET481REL1

Modules

Images
c:\windows\microsoft.net\framework\v4.0.30319\regasm.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\aclayers.dll

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Total events

Read events

Write events

Delete events

Modification events

No data

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

No data

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	23.7.139.93:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
—	—	GET	200	23.7.139.93:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.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
—	—	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
4	System	192.168.100.255:137	—	—	—	whitelisted
2120	MoUsoCoreWorker.exe	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
—	—	23.7.139.93:80	www.microsoft.com	AKAMAI-AS	US	whitelisted
1144	RUXIMICS.exe	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
3888	svchost.exe	239.255.255.250:1900	—	—	—	whitelisted
5796	svchost.exe	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
4288	svchost.exe	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
4324	svchost.exe	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted

DNS requests

Domain	IP	Reputation
settings-win.data.microsoft.com	51.104.136.2 51.124.78.146	whitelisted
www.microsoft.com	23.7.139.93	whitelisted
google.com	142.251.39.110	whitelisted

Threats

No threats detected

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No debug info

General Info

66d5e40f57b39_def_20240902191245.exe

ADE16B249DE80C5D8A459BAAAC67201C

8C795C6C18B99B90D23128413147A160CE0CA78C

F70AF1EA3E7EE9AF7E45F56D107C95F5CED56D0811F1A6F30C936CA7A0175A3D

6144:FMfyRlnrinw1bimhKrckETwxaSsBB2hvhGra7enCci:+K6nwY8SckEkaxM5kaf

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

StealC has been detected

SUSPICIOUS

Process drops legitimate windows executable

Windows Defender mutex has been found

Starts a Microsoft application from unusual location

INFO

Reads the computer name

Checks supported languages

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