Suspicious blat Utility Used for SMTP Data Exfiltration

ATT&CK techniques

Exfiltration

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
- T1048Exfiltration Over Alternative Protocol
Impact

What it detects

This rule detects use of the blat command-line mailer with server and attachment arguments which the Librarian Ghouls APT abuses to email stolen data out over SMTP. Blat is a legitimate but uncommon utility that provides a simple exfiltration channel over an alternate protocol. Its presence sending attachments to an external server on endpoints is suspicious.

Reporting behind it

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Suspicious blat Utility Used for SMTP Data Exfiltration

Pivot detection · T1048 · 9 related

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