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

ATT&CK techniques

Initial Access → C2

Recon
Resource Dev
Initial Access
- T1190Exploit Public-Facing Application
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.004DNS
Exfiltration
Impact

What it detects

This rule detects DNS resolution of well-known out-of-band application security testing and interaction callback domains such as oast.fun, oast.pro, interact.sh, and burpcollaborator.net. These domains are used by exploitation tooling, including scanners for the BeyondTrust CVE-2026-1731 remote code execution flaw, to confirm blind vulnerabilities through out-of-band interaction. Resolution of these domains from server or internal hosts frequently signals active exploitation or reconnaissance against internet-facing services.

Reporting behind it

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

Pivot detection · T1190 · 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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