Suspicious Data Exfiltration via Finger LOLBIN

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 execution of finger.exe, a rarely used legacy binary abused as a living-off-the-land channel for data exfiltration and remote content retrieval. It was catalogued among data-exfiltration LOLBIN binaries. Any finger.exe execution in modern environments is anomalous and warrants review.

Reporting behind it

Related detections9 linkedT1048 — drag to rearrange

Suspicious blat Utility Used for SMTP Data Exfiltration

Suspicious Data Exfiltration via WinSCP Command Line in BlackSuit Ransomware

Suspicious Scheduled Task Creation for rclone Exfiltration by The Gentlemen RaaS (via process_creation)

Suspicious DNS Query for Tor Onion Domain

Possible DNS Tunneling via Excessively Long Query Name

Malicious Bulk Data Exfiltration via Rclone (via process_creation)

BITS Payload Downloaded via Commandline (via process_creation)

BITS Payload Downloaded via PowerShell (via powershell)

Data Exfiltration to WebDAV Share via curl Upload

Suspicious Data Exfiltration via Finger LOLBIN

Pivot detection · T1048 · 9 related

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

Full detection rule

Unlock this rule to view and copy it

The detection logic is included with a plan. Everything else — context, mappings and implementation details — stays free on this page.

Sign in for 3 free unlocks

Signing in gives you 3 unlocks to spend on any rule in the library. No card, and they do not expire.

Also included

Unlocked rules convert on this page — to Splunk SPL or Splunk — Raw Index SPL or Microsoft Sentinel KQL or Microsoft Sentinel ASIM ASIM KQL or Microsoft Defender XDR KQL or Elastic Security KQL or Elastic Security Lucene or Elastic Security ES|QL or CrowdStrike Falcon CQL or SentinelOne PowerQuery or Palo Alto Cortex XDR XQL or Carbon Black Cloud Platform Search or Carbon Black EDR Process Search or Google Security Operations UDM Search or IBM QRadar AQL or Sumo Logic Cloud SIEM Rules expression or Rapid7 InsightIDR LEQL or Graylog Search or OpenSearch Lucene or OpenSearch PPL PPL or Grafana Loki LogQL or SQLite SQL or Zircolite SQLite — with the log-source profile the engine picked, the field map it used, and everything it could not express. Converting a rule you have unlocked costs no further credit.

See it run on a free rule →Convert your own rule →