Malicious SUNBURST avsvmcloud.com C2 DNS Query

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.004DNS
Exfiltration
Impact

What it detects

This rule detects DNS queries to the avsvmcloud.com domain used by SUNBURST for command-and-control via DGA-generated subdomains resolved through CNAME records. The command-and-control domain is a meaningful campaign constant. Any resolution attempt indicates a compromised SolarWinds Orion host beaconing to the adversary.

Reporting behind it

Related detections9 linkedT1071.004 — drag to rearrange

Suspicious Cobalt Strike DNS Beacon Default Subdomain Query Linked to Cozy Bear

Suspicious DNS Query to Interactsh OAST Callback Domains

Possible Out-of-Band OAST Callback Domain Resolution via DNS

Possible TrickBot Anchor DNS C2 Registration via HTTP URI (via proxy)

Possible TrickBot DNS Tunneling C2 to westurn.in (via dns_query)

Suspicious SlowStepper DNS TXT C2 Subdomain Lookup via DNS Query

Malicious PIPEDANCE Named Pipe Command and Control Channel via Pipe Created

Suspicious DNS Query for Tor Onion Domain

Possible DNS Tunneling via Excessively Long Query Name

Malicious SUNBURST avsvmcloud.com C2 DNS Query

Pivot detection · T1071.004 · 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 →