General
- Target common.dat.exe
- Size 13.2MB
- Sample260520-ynb8ssb18v
- SHA256 e940d1ec496a0fe89c2b8780625bea0a43e2b2cf5d3885813bcd2f512c4a5ca8
Score
10/10
Malware Config
Targets
-
- Target common.dat.exe
- Size 13.2MB
- SHA256 e940d1ec496a0fe89c2b8780625bea0a43e2b2cf5d3885813bcd2f512c4a5ca8
Score10/10-
Family: Efimer
Efimer is a trojan written in JS.
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Command and Scripting Interpreter: PowerShell
Using powershell.exe command.
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Loads dropped DLL
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Reads user/profile data of web browsers
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses cryptocurrency files/wallets, possible credential harvesting
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
3JavaScript
1PowerShell
2Scheduled Task/Job
1Scheduled Task
1