Suspicious DNS Query To Interactsh OAST Domain

ATT&CK techniques

Initial Access

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

What it detects

This rule detects DNS lookups to *.oast.fun, an out-of-band application security testing domain used by the actors exploiting CVE-2026-1731 to confirm blind command injection. A callback to an OAST domain from a server indicates the host executed attacker-controlled code during exploitation. Production systems have no legitimate reason to resolve these interaction domains.

Reporting behind it

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Suspicious DNS Query To Interactsh OAST Domain

Pivot detection · T1190 · 9 related

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