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DNS Abuse Detection: DNS server compromise
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DNS Abuse Detection: DNS server compromise
Definition
DNS server compromise involves unauthorized control over, or access to, a legitimate DNS server or its records, enabling adversaries to redirect traffic, manipulate queries, force the server to return malicious IP addresses, and possibly launch several other cyberattacks.
Advice
DNS server compromises can be detected by manually checking server configurations and verifying that they are as intended. If automated configuration is used, then comparing to the source configurations can also be useful.
Checking server logs for unusual or unauthorized access from external locations can also indicate a server compromise.
A properly deployed IDR (Intrusion Detection and Response) or IDP (Intrusion Detection and Prevention) system can also detect server compromises. There are many options available for evaluation.
Automated checking of significant DNS records, e.g. parent domain A records and NS records, can show that a compromise may have taken place.
Example
Global DNS Hijacking Campaign: DNS Record Manipulation at Scale
Details from Google Security about potentially state-sponsored hijacking via compromised DNS administration panels access through proxy servers.
Potential Resources
- DNS configurations and configuration build sources
- DNS resolver logs
- Server access logs
- DNS Abuse SIG
- Stakeholder Advice
- Detection
- Cache Poisoning
- Creation of Malicious Subdomains Under Dynamic DNS Providers
- DGA Domains
- DNS As a Vector for DoS
- DNS Beacons - C2 Communication
- DNS Rebinding
- DNS Server Compromise
- DNS Tunneling
- DoS Against the DNS
- Domain Name Compromise
- Dynamic DNS (as obfuscation technique)
- Fast Flux (as obfuscation technique)
- Infiltration and exfiltration via the DNS
- Lame Delegations
- Local Resolver Hijacking
- Malicious registration of (effective) second level domains
- On-path DNS Attack
- Stub Resolver Hijacking
- Detection
- Code of Conduct & Other Policies
- Examples of DNS Abuse
- Stakeholder Advice