FTP Data Exfiltration via curl with Embedded Credentials

ATT&CK techniques

Exfiltration

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
- T1048.003Exfiltration Over Unencrypted Non-C2 Protocol
Impact

What it detects

This rule detects curl uploading a file to an FTP server using inline username and password credentials. Unfading Sea Haze uses this method to move staged archives of stolen data to attacker controlled infrastructure.

Reporting behind it

Related detections9 linkedT1048.003 — drag to rearrange

Suspicious Data Exfiltration via TFTP Client

Suspicious Finger Client Execution for Command and Control

Malicious dnscat2 DNS Tunneling C2 Traffic

Suspicious Data Transfer via curl to Raw IP Address

Linux Python CLI Web Server Execution via http.server or SimpleHTTPServer

Windows svchost.exe Spawning rundll32.exe with WebDav davclnt.dll DavSetCookie

PowerShell Script Exfiltration Attempt: Send-MailMessage with Attachments

Windows Suspicious Outbound SMTP Connections on Common Mail Ports

Linux wget POST-file Usage Indicating Data Exfiltration

FTP Data Exfiltration via curl with Embedded Credentials

Pivot detection · T1048.003 · 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 →