| File name: | 250428-ktpjessms7_pw_infected.zip |
| Full analysis: | https://app.any.run/tasks/85223ff2-cd53-44f9-b5d5-c362f3963b0c |
| 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: | April 29, 2025, 07:13:23 |
| OS: | Windows 10 Professional (build: 19044, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/zip |
| File info: | Zip archive data, at least v2.0 to extract, compression method=AES Encrypted |
| MD5: | 4AF68422940ADBB12412BA65789C916B |
| SHA1: | AF32B075571F890C7EDF9F31FF84817041D2658B |
| SHA256: | 5439651CAD4A83BE39D97BF0E4D4BE8E21F58769C9CEC965F7B746658E8B7DD0 |
| SSDEEP: | 49152:x3QkqN9UUbB5o0KCtrXdstOVdV9ggslFIQ1FVYlCgeF22ow1j9F4BqaU0BdaK9E3:x3hU2Ud5AgrXWOEgs0Q/+wF2MX4nFBgT |
MALICIOUS
STEALC has been detected
- sample.exe (PID: 6184)
STEALC has been detected (SURICATA)
- sample.exe (PID: 6184)
Connects to the CnC server
- sample.exe (PID: 6184)
SUSPICIOUS
Process drops legitimate windows executable
- WinRAR.exe (PID: 5680)
Starts a Microsoft application from unusual location
- sample.exe (PID: 6184)
- sample.exe (PID: 2568)
Application launched itself
- sample.exe (PID: 2568)
Reads security settings of Internet Explorer
- sample.exe (PID: 6184)
Connects to the server without a host name
- sample.exe (PID: 6184)
Contacting a server suspected of hosting an CnC
- sample.exe (PID: 6184)
INFO
Executable content was dropped or overwritten
- WinRAR.exe (PID: 5680)
The sample compiled with english language support
- WinRAR.exe (PID: 5680)
Manual execution by a user
- sample.exe (PID: 2568)
Checks supported languages
- sample.exe (PID: 6184)
- sample.exe (PID: 2568)
Reads the computer name
- sample.exe (PID: 6184)
Checks proxy server information
- sample.exe (PID: 6184)
- slui.exe (PID: 632)
Reads the software policy settings
- slui.exe (PID: 2244)
- slui.exe (PID: 632)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .zip | | | ZIP compressed archive (100) |
|---|
EXIF
ZIP
| ZipRequiredVersion: | 20 |
|---|---|
| ZipBitFlag: | 0x0009 |
| ZipCompression: | Unknown (99) |
| ZipModifyDate: | 1980:00:00 00:00:00 |
| ZipCRC: | 0x00000000 |
| ZipCompressedSize: | 1651339 |
| ZipUncompressedSize: | 1812992 |
| ZipFileName: | 2025-04-28_755d22f49be2b1db415c13970e1ac15e_black-basta_cobalt-strike_ryuk_satacom |
Total processes
136
Monitored processes
6
Malicious processes
2
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 632 | 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
| |||||||||||||||
| 2244 | "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 Exit code: 1 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 2568 | "C:\Users\admin\Desktop\sample.exe" | C:\Users\admin\Desktop\sample.exe | — | explorer.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Microsoft Windows Media Player Setup Utility Exit code: 0 Version: 12.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 5680 | "C:\Program Files\WinRAR\WinRAR.exe" C:\Users\admin\AppData\Local\Temp\250428-ktpjessms7_pw_infected.zip | C:\Program Files\WinRAR\WinRAR.exe | explorer.exe | ||||||||||||
User: admin Company: Alexander Roshal Integrity Level: MEDIUM Description: WinRAR archiver Exit code: 0 Version: 5.91.0 Modules
| |||||||||||||||
| 5960 | 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 Exit code: 0 Version: 10.0.19041.3996 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 6184 | "C:\Users\admin\Desktop\sample.exe" | C:\Users\admin\Desktop\sample.exe | sample.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Microsoft Windows Media Player Setup Utility Exit code: 0 Version: 12.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
Total events
2 949
Read events
2 927
Write events
22
Delete events
0
Modification events
| (PID) Process: | (5680) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 3 |
Value: C:\Users\admin\Desktop\preferences.zip | |||
| (PID) Process: | (5680) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 2 |
Value: C:\Users\admin\Desktop\chromium_ext.zip | |||
| (PID) Process: | (5680) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 1 |
Value: C:\Users\admin\Desktop\omni_23_10_2024_.zip | |||
| (PID) Process: | (5680) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 0 |
Value: C:\Users\admin\AppData\Local\Temp\250428-ktpjessms7_pw_infected.zip | |||
| (PID) Process: | (5680) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | name |
Value: 120 | |||
| (PID) Process: | (5680) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | size |
Value: 80 | |||
| (PID) Process: | (5680) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | type |
Value: 120 | |||
| (PID) Process: | (5680) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | mtime |
Value: 100 | |||
| (PID) Process: | (5680) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\Interface |
| Operation: | write | Name: | ShowPassword |
Value: 0 | |||
| (PID) Process: | (5680) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\ArcColumnWidths |
| Operation: | write | Name: | name |
Value: 256 | |||
Executable files
1
Suspicious files
0
Text files
0
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 5680 | WinRAR.exe | C:\Users\admin\AppData\Local\Temp\Rar$DRb5680.12411\2025-04-28_755d22f49be2b1db415c13970e1ac15e_black-basta_cobalt-strike_ryuk_satacom | executable | |
MD5:755D22F49BE2B1DB415C13970E1AC15E | SHA256:CCB18F6DDB9D7BDE877734F4183A660D453024E5932EFB81E621E1C66D6C5B37 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
6
TCP/UDP connections
24
DNS requests
17
Threats
1
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
5496 | MoUsoCoreWorker.exe | GET | 200 | 2.16.164.72:80 | 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 |
6544 | svchost.exe | GET | 200 | 2.23.77.188:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | whitelisted |
3096 | SIHClient.exe | GET | 200 | 95.101.149.131:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl | unknown | — | — | whitelisted |
3096 | SIHClient.exe | GET | 200 | 95.101.149.131:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl | unknown | — | — | whitelisted |
6184 | sample.exe | POST | 200 | 91.211.250.177:80 | http://91.211.250.177/24777744417c481c.php | unknown | — | — | unknown |
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 |
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
— | — | 40.127.240.158:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
5496 | MoUsoCoreWorker.exe | 2.16.164.72:80 | crl.microsoft.com | Akamai International B.V. | NL | whitelisted |
5496 | MoUsoCoreWorker.exe | 2.23.246.101:80 | www.microsoft.com | Ooredoo Q.S.C. | QA | whitelisted |
3216 | svchost.exe | 172.211.123.249:443 | client.wns.windows.com | MICROSOFT-CORP-MSN-AS-BLOCK | FR | whitelisted |
6544 | svchost.exe | 20.190.160.67:443 | login.live.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
6544 | svchost.exe | 2.23.77.188:80 | ocsp.digicert.com | AKAMAI-AS | DE | whitelisted |
2104 | svchost.exe | 51.104.136.2:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
6184 | sample.exe | 91.211.250.177:80 | — | Zomro B.V. | NL | unknown |
DNS requests
Domain | IP | Reputation |
|---|---|---|
google.com |
| whitelisted |
settings-win.data.microsoft.com |
| whitelisted |
crl.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
client.wns.windows.com |
| whitelisted |
login.live.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
slscr.update.microsoft.com |
| whitelisted |
fe3cr.delivery.mp.microsoft.com |
| whitelisted |
activation-v2.sls.microsoft.com |
| whitelisted |
Threats
PID | Process | Class | Message |
|---|---|---|---|
6184 | sample.exe | Malware Command and Control Activity Detected | ET MALWARE StealC v2 CnC Checkin (POST) |