Versions (4)
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Rev: 1 • Feb 27, 2023, 12:00 PMET MALWARE NimPlant Task Activity (GET)
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE NimPlant Task Activity (GET)"; flow:established,to_server; flowbits:set,ET.nimplant; urilen:5; http.method; content:"GET"; http.uri; content:"/task"; fast_pattern; http.accept_enc; content:"gzip"; bsize:4; http.header; content:"|0d 0a|X-Identifier|3a 20|"; pcre:"/^[a-zA-Z]{8}\r\n/R"; http.header_names; content:"|0d 0a|User-Agent|0d 0a|X-Identifier|0d 0a|Host|0d 0a 0d 0a|"; content:!"Referer"; threshold:type both, count 1, seconds 120, track by_src; reference:url,github.com/chvancooten/NimPlant; classtype:trojan-activity; sid:2044350; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_02_27, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_27; target:src_ip;)
Feb 27, 2023, 12:00 PM
Feb 27, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 25, 2025, 9:35 PM
rules/emerging-malware.rules