Suspicious DNS Queries to Secshow Open Resolver Scanning Infrastructure

ATT&CK techniques

Recon → C2

Recon
- T1590Gather Victim Network Information
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 associated with the secshow campaign that abuses open resolvers with crafted FQDNs encoding hex IP addresses, timestamps and amplification test markers. The activity maps and probes network infrastructure through DNS while blending into ordinary resolution traffic. Detecting these lookups exposes reconnaissance and DNS tunneling behavior tied to the secshow operation.

Reporting behind it

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Suspicious DNS Queries to Secshow Open Resolver Scanning Infrastructure

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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