Suspicious AstarionRAT HTTP Beacon Cookie Values

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.001Web Protocols
Exfiltration
Impact

What it detects

This rule detects outbound HTTP requests carrying the distinctive cookie tokens AFUAK, BLA or HFK used by the AstarionRAT command and control beacon observed in the analyzed intrusion. These structured cookie values are protocol-specific constants of the RAT rather than incidental strings, making them reliable network indicators. Traffic bearing these cookies signals an active RAT check-in and should be investigated as a compromise.

Reporting behind it

Related detections9 linkedT1071.001 — drag to rearrange

Suspicious PowerShell Web Request to oastify Out-of-Band Domain

Suspicious osascript Spawning curl to High Port C2 via process_creation

Suspicious PowerShell Spawned by Web Browser

Suspicious Outbound Request to Webhook.site Interaction Service

Malicious C2 Communication via cur1-request User-Agent on macOS

Suspicious AdaptixC2 Beacon Status Request by JadeProx TriBack Loader (via proxy)

Suspicious HTTP Beacon with Java Agent User-Agent (via proxy)

Possible GoldFactory GoldPickaxe Mobile Trojan C2 API Calls

Malicious Phishing Data Exfiltration to SheetBest API by GitBait Campaign (via proxy)

Suspicious AstarionRAT HTTP Beacon Cookie Values

Pivot detection · T1071.001 · 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 →