Malicious Fivehands Go Encryptor Execution via Command Line Flags

ATT&CK techniques

Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1486Data Encrypted for Impact

What it detects

This rule detects execution of the Fivehands Go based file encryptor identified by its characteristic command line flags key path blocks and full as described in NCC Group Fivehands ransomware research. The operator invokes the encryptor with a supplied key and target path to encrypt files and append the crypt extension which is the destructive final stage of the intrusion.

Reporting behind it

Related detections9 linkedT1486 — drag to rearrange

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Malicious CACTUS Ransomware Note and Encrypted File Artifacts (via file_event)

Malicious Macaw Ransom Note or Encrypted File Written (via file_event)

Suspicious Executable Execution from PerfLogs Directory via process_creation

BlackCat ALPHV Ransomware Execution With access-token Argument

Malicious Fivehands Go Encryptor Execution via Command Line Flags

Pivot detection · T1486 · 9 related

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