Rule History

SID: 2044340 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 1 • Feb 24, 2023, 12:00 PM

Message:

ET MALWARE Observed NimPlant Server Response (Inbound)

Rule:

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed NimPlant Server Response (Inbound)"; flow:established,to_client; http.header; content:"|0d 0a|Server|3a 20|NimPlant C2 Server|0d 0a|"; nocase; fast_pattern; reference:url,github.com/chvancooten/NimPlant; classtype:trojan-activity; sid:2044340; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_02_24, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_24; target:dest_ip;)

Created:

Feb 24, 2023, 12:00 PM

Updated:

Feb 24, 2023, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Aug 25, 2025, 9:35 PM

Filename:

rules/emerging-malware.rules