Emerging Threathightest
UNC4841 - Email Exfiltration File Pattern
Detects filename pattern of email related data used by UNC4841 for staging and exfiltration
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Launch
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
LinuxFile Event
ProductLinux← raw: linux
CategoryFile Event← raw: file_event
Events for file system activity including creation, modification, and deletion.
Detection Logic
Detection Logic1 selector
detection:
selection:
TargetFilename|re: '/mail/tmp/[a-zA-Z0-9]{3}[0-9]{3}\.tar\.gz'
condition: selectionFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Other
detection.emerging-threats
Rule Metadata
Rule ID
0785f462-60b0-4031-9ff4-b4f3a0ba589a
Status
test
Level
high
Type
Emerging Threat
Created
Fri Jun 16
Path
rules-emerging-threats/2023/TA/UNC4841-Barracuda-ESG-Zero-Day-Exploitation/file_event_lnx_apt_unc4841_exfil_mail_pattern.yml
Raw Tags
attack.executionattack.persistenceattack.defense-evasiondetection.emerging-threats