ET MALWARE DistTrack/Shamoon CnC Beacon M2

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".";
content:"?"; distance:3; within:1;
pcre:"/\.[a-z]{3}\?[a-z]+=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/";
http.user_agent;
content:"Mozilla/5.0 (MSIE 7.1|3b 20|Windows NT 6.0)"; fast_pattern; bsize:38;
http.header_names;
content:!"Accept";
content:!"Referer|0d 0a|";
Raw source ET MALWARE DistTrack/Shamoon CnC Beacon M2 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE DistTrack/Shamoon CnC Beacon M2";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".";
    content:"?"; distance:3; within:1;
    pcre:"/\.[a-z]{3}\?[a-z]+=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/";
    http.user_agent;
    content:"Mozilla/5.0 (MSIE 7.1|3b 20|Windows NT 6.0)"; fast_pattern; bsize:38;
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    reference:md5,5446f46d89124462ae7aca4fce420423;
    reference:md5,5bac4381c00044d7f4e4cbfd368ba03b;
    reference:url,researchcenter.paloaltonetworks.com/2016/11/unit42-shamoon-2-return-disttrack-wiper/;
    classtype:command-and-control;
    sid:2023571; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_12_01, deployment Perimeter, malware_family DistTrack, malware_family Shamoon, signature_severity Major, tag c2, updated_at 2020_08_03, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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