Malicious Lazarus RustyAttr Payload Retrieval via curl to Support Cloudstore C2 (via process_creation)

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1105Ingress Tool Transfer
Exfiltration
Impact

What it detects

This rule detects the macOS curl download used by Lazarus RustyAttr activity to fetch a shell payload over an insecure -L -k connection from support.cloudstore.business or support.docsend.site as reported by Group-IB. Adversaries retrieve the second-stage script from this infrastructure before executing it through AppleScript, making this an early indicator of the intrusion.

Reporting behind it

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Malicious Lazarus RustyAttr Payload Retrieval via curl to Support Cloudstore C2 (via process_creation)

Pivot detection · T1105 · 9 related

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