ALT-2433 · DNS
Excessive DNS NXDOMAIN from single host
412 NXDOMAIN responses in 10 minutes matching DGA-like patterns.
Detection summary
412 NXDOMAIN responses in 10 minutes matching DGA-like patterns.
- Affected host
- SRV-FILE-03
- Affected user
- r.wijaya
- Source IP
- 10.20.4.185
- Detection rule
- DET-0033 DGA Heuristic
- Log source
- DNS
- Assignee
- S. Hartono
Recommended actions
- Verify against known DGA feeds
- Check for a misconfigured client first
Analyst decision
Triage checklist
- 1. Confirm the detection logic matched genuine activity.
- 2. Check user and asset context for expected behaviour.
- 3. Pivot on host, user, IP and hash in the Log Explorer.
- 4. Enrich IOCs with threat intelligence.
- 5. Set a verdict and record your reasoning.
Learn this capability
Hands-on labs that build the technique behind this workspace. Skills transfer to any mainstream SIEM.
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Three critical alerts are open. Each describes a different attacker goal. To discuss them with anyone else in security you need the ATT&CK vocabulary.