ET MALWARE MSIL/Crimson Receiving Command (ping) M1

Query · suricata

flow:established,from_server;
content:"clping=Ping"; offset:5;
byte_jump:4,0,little,from_beginning,post_offset 4;
isdataat:!2,relative;
Raw source ET MALWARE MSIL/Crimson Receiving Command (ping) M1 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE MSIL/Crimson Receiving Command (ping) M1";
    flow:established,from_server;
    content:"clping=Ping"; offset:5;
    byte_jump:4,0,little,from_beginning,post_offset 4;
    isdataat:!2,relative;
    reference:md5,94d29dded4dfd920fc4153f18e82fc6c;
    reference:md5,40c9031ee6bbf2b2306420e9330727a6;
    classtype:trojan-activity;
    sid:2035904; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_02_17, deployment Perimeter, malware_family Crimson, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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.