Malicious BRICKSTORM Backdoor Execution via Masqueraded Binary Path

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1543Create or Modify System Process
Priv Esc
- T1543Create or Modify System Process
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects execution of the BRICKSTORM backdoor from masqueraded system paths used by the VerdantBamboo intrusion set. The malware was deployed as /usr/sbin/luserput and as a blacklist binary under the IPSec libexec directory on pfSense firewalls to blend with legitimate appliance components. Detecting these hardcoded drop locations exposes an active foothold on network edge devices used for long-term espionage.

Reporting behind it

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Malicious BRICKSTORM Backdoor Execution via Masqueraded Binary Path

Pivot detection · T1543 · 9 related

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