ET MALWARE Win32.Agent.OSCF CnC Checkin

Query · suricata

flow:established,to_server;
content:"IP|3d|";
content:"IP|3d|"; distance:0;
content:"|3d|Microsoft|20|Windows|20|"; fast_pattern; distance:0;
content:"|3d|C|3a 5c|"; distance:0;
byte_jump:4,0,little,from_beginning;
content:"|0d 0a 0d 0a|"; endswith;
Raw source ET MALWARE Win32.Agent.OSCF CnC Checkin · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32.Agent.OSCF CnC Checkin";
    flow:established,to_server;
    content:"IP|3d|";
    content:"IP|3d|"; distance:0;
    content:"|3d|Microsoft|20|Windows|20|"; fast_pattern; distance:0;
    content:"|3d|C|3a 5c|"; distance:0;
    byte_jump:4,0,little,from_beginning;
    content:"|0d 0a 0d 0a|"; endswith;
    reference:md5,38fdb5c2bf21500a888fa9b0d9649a19;
    classtype:trojan-activity;
    sid:2039607; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_10_31, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_10_31;
)

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