Suspicious CrazyHunter Distribution Tool Connecting to File Server on Port 9999

ATT&CK techniques

Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1486Data Encrypted for Impact

What it detects

This rule detects the CrazyHunter distribution binary file.exe establishing a network connection to a staging file server on TCP port 9999. During the intrusion the operators host payloads on an internal file server and pull them via this tool over the uncommon port 9999, so this traffic indicates lateral staging of ransomware components before encryption.

Reporting behind it

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Suspicious CrazyHunter Distribution Tool Connecting to File Server on Port 9999

Pivot detection · T1486 · 9 related

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