General
- Target d5f9fa1a8dca5319432f51a5891f7794_JaffaCakes118
- Size 7.1MB
- Sample240909-knsnwszdmk
- SHA256 18f4123ee42f5a29f8df7bd1cf95ab73441f082584f390aa218c2dd1134f4055
Score
10/10
Malware Config
Targets
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- Target d5f9fa1a8dca5319432f51a5891f7794_JaffaCakes118
- Size 7.1MB
- SHA256 18f4123ee42f5a29f8df7bd1cf95ab73441f082584f390aa218c2dd1134f4055
Score10/10-
Deletes Windows Defender Definitions
Uses mpcmdrun utility to delete all AV definitions.
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Mimikatz
mimikatz is an open source tool to dump credentials on Windows.
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Zhen Executable
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Zhen Ransomware
First seen in September 2020. Drops ransomnote as .ini file.
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Creates a large amount of network flows
This may indicate a network scan to discover remotely running services.
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Renames multiple (1884) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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mimikatz is an open source tool to dump credentials on Windows
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Possible privilege escalation attempt
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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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Modifies file permissions
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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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Adds Run key to start application
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Drops file in System32 directory
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Sets desktop wallpaper using registry
MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
File and Directory Permissions Modification
1Impair Defenses
1Modify Registry
2