General
- Target LastSignal-Installer.exe
- Size 8.6MB
- Sample261026-td6mfaez7s
- SHA256 a07ed0b90473960b36bb0d60846d1d8561c806d5218301a951fdfb3718f25867
Score
9/10
Malware Config
Targets
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- Target LastSignal-Installer.exe
- Size 8.6MB
- SHA256 a07ed0b90473960b36bb0d60846d1d8561c806d5218301a951fdfb3718f25867
Score9/10-
Renames multiple (6130) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Boot or Logon Autostart Execution: Active Setup
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
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Downloads MZ/PE file
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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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Adds Run key to start application
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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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
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
2Active Setup
1Registry Run Keys / Startup Folder
1Privilege Escalation
Boot or Logon Autostart Execution
2Active Setup
1Registry Run Keys / Startup Folder
1Defense Evasion
Modify Registry
4Subvert Trust Controls
2Install Root Certificate
2