Malicious Ransomware Extension Class Registration for ELPACO-team by Elpaco Ransomware

ATT&CK techniques

Persistence → Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1112Modify Registry
Priv Esc
Defense Evasion
- T1112Modify Registry
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1486Data Encrypted for Impact

What it detects

This rule detects registration of the .ELPACO-team file extension class under HKLM Classes. Elpaco ransomware, a Mimic variant, registers its own encrypted-file extension to associate the ransom note handler after encryption. Presence of this class key indicates ransomware has executed and modified file associations on the host.

Reporting behind it

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Malicious Ransomware Extension Class Registration for ELPACO-team by Elpaco Ransomware

Pivot detection · T1112 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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