ET MALWARE Win32/Small.NMZ CnC Checkin

Query · suricata

flow:established,to_server;
http.request_line;
content:"GET|20|/O.htm|20|"; fast_pattern;
http.user_agent;
content:"|3b 2b|SV1|3b|";
http.header_names;
content:"|0d 0a|Cache-Control|0d 0a|Connection|0d 0a|Pragma|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; startswith;
Raw source ET MALWARE Win32/Small.NMZ CnC Checkin · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Small.NMZ CnC Checkin";
    flow:established,to_server;
    http.request_line;
    content:"GET|20|/O.htm|20|"; fast_pattern;
    http.user_agent;
    content:"|3b 2b|SV1|3b|";
    http.header_names;
    content:"|0d 0a|Cache-Control|0d 0a|Connection|0d 0a|Pragma|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; startswith;
    reference:md5,4a8af3635882ee62d67ec9dd47c87796;
    classtype:command-and-control;
    sid:2037879; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_08_01, deployment Perimeter, malware_family Win32_Small_NMZ, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_01, reviewed_at 2024_12_24;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.