| File name: | 3c5496b55f5caf0eb6485bc4031773f5.exe |
| Full analysis: | https://app.any.run/tasks/18ef4572-e309-4952-9827-1bc5890b30cf |
| 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. |
| Analysis date: | March 24, 2025, 12:21:28 |
| OS: | Windows 10 Professional (build: 19045, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/vnd.microsoft.portable-executable |
| File info: | PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows, 3 sections |
| MD5: | 3C5496B55F5CAF0EB6485BC4031773F5 |
| SHA1: | 437D398E6841C0996AC312C53839FD55BF264743 |
| SHA256: | CAC84C704AA3124A266AB97902A55241CCC32BC3FD9E18BB87424DFCF151D88F |
| SSDEEP: | 49152:4aaK9s8PYXZu6XHZmUiTomvYDoCGVTUhdzx1Aq1A96hmwEAjkkDvqdBczD4bf4KD:taKK86Q6oUiTxoovQHxyE5jlUBc8f4KD |
MALICIOUS
StealC has been detected
- InstallUtil.exe (PID: 6540)
STEALC has been detected (SURICATA)
- InstallUtil.exe (PID: 6540)
Connects to the CnC server
- InstallUtil.exe (PID: 6540)
SUSPICIOUS
Windows Defender mutex has been found
- InstallUtil.exe (PID: 6540)
Reads security settings of Internet Explorer
- InstallUtil.exe (PID: 6540)
Connects to the server without a host name
- InstallUtil.exe (PID: 6540)
Contacting a server suspected of hosting an CnC
- InstallUtil.exe (PID: 6540)
INFO
Reads the computer name
- 3c5496b55f5caf0eb6485bc4031773f5.exe (PID: 6644)
- InstallUtil.exe (PID: 6540)
Checks supported languages
- 3c5496b55f5caf0eb6485bc4031773f5.exe (PID: 6644)
- InstallUtil.exe (PID: 6540)
Manual execution by a user
- InstallUtil.exe (PID: 6540)
Reads the machine GUID from the registry
- 3c5496b55f5caf0eb6485bc4031773f5.exe (PID: 6644)
Checks proxy server information
- InstallUtil.exe (PID: 6540)
- slui.exe (PID: 6972)
Creates files or folders in the user directory
- InstallUtil.exe (PID: 6540)
Reads the software policy settings
- slui.exe (PID: 6972)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .exe | | | Generic CIL Executable (.NET, Mono, etc.) (63.1) |
|---|---|---|
| .exe | | | Win64 Executable (generic) (23.8) |
| .dll | | | Win32 Dynamic Link Library (generic) (5.6) |
| .exe | | | Win32 Executable (generic) (3.8) |
| .exe | | | Generic Win/DOS Executable (1.7) |
EXIF
EXE
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 2025:03:21 03:35:15+00:00 |
| ImageFileCharacteristics: | Executable, No line numbers, No symbols, 32-bit |
| PEType: | PE32 |
| LinkerVersion: | 8 |
| CodeSize: | 1222656 |
| InitializedDataSize: | 2048 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x12c64e |
| OSVersion: | 4 |
| ImageVersion: | - |
| SubsystemVersion: | 4 |
| Subsystem: | Windows GUI |
| FileVersionNumber: | 1.0.0.0 |
| ProductVersionNumber: | 1.0.0.0 |
| FileFlagsMask: | 0x003f |
| FileFlags: | (none) |
| FileOS: | Win32 |
| ObjectFileType: | Executable application |
| FileSubtype: | - |
| LanguageCode: | Neutral |
| CharacterSet: | Unicode |
| Comments: | - |
| CompanyName: | - |
| FileDescription: | Aaazpkgq |
| FileVersion: | 1.0.0.0 |
| InternalName: | Aaazpkgq.exe |
| LegalCopyright: | Copyright © 2023 |
| LegalTrademarks: | - |
| OriginalFileName: | Aaazpkgq.exe |
| ProductName: | Aaazpkgq |
| ProductVersion: | 1.0.0.0 |
| AssemblyVersion: | 1.0.0.0 |
Total processes
127
Monitored processes
3
Malicious processes
1
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6540 | "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe" | C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe | explorer.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: .NET Framework installation utility Exit code: 0 Version: 4.8.9037.0 built by: NET481REL1 Modules
| |||||||||||||||
| 6644 | "C:\Users\admin\Desktop\3c5496b55f5caf0eb6485bc4031773f5.exe" | C:\Users\admin\Desktop\3c5496b55f5caf0eb6485bc4031773f5.exe | — | explorer.exe | |||||||||||
User: admin Integrity Level: MEDIUM Description: Aaazpkgq Exit code: 4294967295 Version: 1.0.0.0 Modules
| |||||||||||||||
| 6972 | 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 Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
Total events
3 817
Read events
3 814
Write events
3
Delete events
0
Modification events
| (PID) Process: | (6540) InstallUtil.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content |
| Operation: | write | Name: | CachePrefix |
Value: | |||
| (PID) Process: | (6540) InstallUtil.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies |
| Operation: | write | Name: | CachePrefix |
Value: Cookie: | |||
| (PID) Process: | (6540) InstallUtil.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History |
| Operation: | write | Name: | CachePrefix |
Value: Visited: | |||
Executable files
0
Suspicious files
0
Text files
0
Unknown types
0
Dropped files
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
4
TCP/UDP connections
23
DNS requests
4
Threats
3
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
6540 | InstallUtil.exe | GET | 200 | 176.65.142.161:80 | http://176.65.142.161/ | unknown | — | — | unknown |
6540 | InstallUtil.exe | POST | 200 | 176.65.142.161:80 | http://176.65.142.161/f698bbaeef359c28.php | unknown | — | — | malicious |
— | — | POST | 500 | 40.91.76.224:443 | https://activation-v2.sls.microsoft.com/SLActivateProduct/SLActivateProduct.asmx?configextension=Retail | unknown | xml | 512 b | whitelisted |
— | — | POST | 500 | 40.91.76.224:443 | https://activation-v2.sls.microsoft.com/SLActivateProduct/SLActivateProduct.asmx?configextension=Retail | 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 |
|---|---|---|---|---|---|---|
— | — | 51.124.78.146:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
2104 | svchost.exe | 51.124.78.146:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
6540 | InstallUtil.exe | 176.65.142.161:80 | — | — | DE | malicious |
6300 | slui.exe | 40.91.76.224:443 | activation-v2.sls.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | US | whitelisted |
6972 | slui.exe | 20.83.72.98:443 | activation-v2.sls.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | US | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
settings-win.data.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
activation-v2.sls.microsoft.com |
| whitelisted |
Threats
PID | Process | Class | Message |
|---|---|---|---|
6540 | InstallUtil.exe | Misc Attack | ET DROP Spamhaus DROP Listed Traffic Inbound group 29 |
6540 | InstallUtil.exe | Malware Command and Control Activity Detected | STEALER [ANY.RUN] Stealc HTTP POST Request |
6540 | InstallUtil.exe | Malware Command and Control Activity Detected | ET MALWARE [SEKOIA.IO] Win32/Stealc C2 Check-in |