Tailoring Cobalt Strike on Target
ID: 10c44802-6b85-5b97-ad0b-92bac93872f9
STIX ID: report--10c44802-6b85-5b97-ad0b-92bac93872f9
Feed Name: XPN Infosec Blog
Threat Score
This TrustedSec blog post explains a proof-of-concept technique to locate Cobalt Strike beacon configuration in memory, XOR-decode it, and modify malleable profile options (notably user-agent and C2 server/URI) at runtime before allowing the beacon to execute. The post includes C structs and C code snippets for parsing configuration fields, selecting context-appropriate user-agents, testing connectivity to candidate C2 endpoints, and re-encoding the config so the agent will use more accurate and reachable C2 settings.
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