huntrule

Sysmon DNS Query for anonfiles.com Domain

Flags Windows Sysmon DNS queries referencing anonfiles.com to support detection of suspicious data staging.

FreeReviewedSigma · High · v2
Product
windows
Category
dns_query
Author
pH-T (Nextron Systems) (SigmaHQ), DRL 1.1
Published
2022-07-15
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Exfiltration

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule flags DNS queries whose query name contains ".anonfiles.com". Attackers may use lookups to resolve domains associated with anonymous file hosting for staging or exfiltration workflows. It relies on Sysmon Windows telemetry for DNS query events, specifically the queried name field.

Reporting behind it

Related detections9 linkedT1567.002 — drag to rearrange
Suspicious ALPHA SPIDER Rclone Exfiltration Tool Masquerading as System Binary (via process_creation)
Malicious GhostLocker2 C2 Communication via HTTP POST (via proxy)
Suspicious Rclone Exfiltration Masquerading as wininit.exe
Malicious Bulk Data Exfiltration via Rclone (via process_creation)
Rclone SMB Share Exfiltration
Suspicious Data Exfiltration via Rclone to Cloud Storage (via process_creation)
Malicious Data Exfiltration via MEGAcmd
Suspicious Command and Control via Discord or Telegram Bot API
Data Exfiltration to WebDAV Share via curl Upload
Sysmon DNS Query for anonfiles.com Domain
Pivot detection · T1567.002 · 9 related

Changelog

v2
  1. v2
    Candidate ingested via manual entry.2026-07-31
  2. v1
    No changelog recorded for this version.2026-07-30

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