Suspicious SlowStepper DNS TXT C2 Subdomain Lookup via 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 lookups to the gsm.360safe.company namespace, the command-and-control domain the SlowStepper backdoor queries over DNS TXT records after the PlushDaemon supply-chain compromise. This subdomain pattern is specific to the actor infrastructure. Its resolution indicates active DNS-based C2 communication.

Reporting behind it

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Suspicious SlowStepper DNS TXT C2 Subdomain Lookup via 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.

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