Suspicious UNC1549 Azure C2 Beacon to News Notifications URI Pattern (via proxy)

PremiumReviewedSigma · Low · v1
Category
proxy
Author
HuntRule
Published
2026-10-13
Updated
2026-10-13

ATT&CK techniques

C2
  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. Exfiltration

  13. Impact

What it detects

This rule detects HTTP requests to Azure-hosted command-and-control paths matching a /news/notifications/ prefix followed by a numeric identifier. UNC1549 tunneled MINIBIKE traffic through Azure cloud infrastructure using this structured URI scheme to blend with legitimate cloud services. The consistent notifications URI layout is a usable network fingerprint for the campaign.

Related detections9 linkedT1071.001 — drag to rearrange
Malicious OilRig OAuth Application Sign-In via Azure (via azure)
Suspicious Telegram API proxy access without Telegram User-Agent
Suspicious macOS ClickFix Execution Piping curl to zsh via UNC1069
Possible Residential Proxyware Beacon to PacketSDK Infrastructure
Possible GhostContainer Exchange Backdoor C2 Request via OWA (via webserver)
Malicious AdaptixC2 Beacon via X-Beacon-Id Header and Default User Agent (via proxy)
Possible JanelaRAT C2 Beacon via Structured HTTP Query (via proxy)
Suspicious StupidSandwichAgent User-Agent in C2 Traffic by StaryDobry
Suspicious CanesSpy WhatsApp Mod C2 Beacon to AllRequest Endpoint (via proxy)
Suspicious UNC1549 Azure C2 Beacon to News Notifications URI Pattern (via proxy)
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.