General
- Target Kitties Client.7z
- Size 127.1MB
- Sample260715-n75dkse15z
- SHA256 34fa161936219146bb0b4f914e2480bf452192b3ac04f02ea90b81ca626cee50
Malware Config
Targets
-
- Target Kitties Client.exe
- Size 134.3MB
- SHA256 f1357e345853b081fa3aa643d7f280bffd2e85a6b146bff49adc96caf4f21940
Score10/10Family: stealc_stealer
Family: xmrig
XMRig is a high performance, open source, cross platform CPU/GPU miner.
- Custom signature
Detects StealC in memory using payload markers, WinINet APIs and protocol strings
StealC Stealer.
XMRig Miner payload
Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
Infostealers often target stored browser data, which can include saved credentials etc.
Unsecured Credentials: Credentials In Files
Steal credentials from unsecured files.
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
Contacts third-party web service commonly abused for C2
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
Enumerates processes with tasklist
Suspicious use of SetThreadContext
UPX packed file
Detects executables packed with UPX/modified UPX open source packer.
MITRE ATT&CK Enterprise v16
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
3Credentials In Files
3