ET MALWARE PS1/Unknown Payload C2 Downloader (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"|2f 3f|status|3d|"; startswith; fast_pattern;
content:"&av=";
content:"&domain=";
content:"&os=";
http.user_agent;
content:"WindowsPowerShell";
Raw source ET MALWARE PS1/Unknown Payload C2 Downloader (GET) · 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 PS1/Unknown Payload C2 Downloader (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"|2f 3f|status|3d|"; startswith; fast_pattern;
    content:"&av=";
    content:"&domain=";
    content:"&os=";
    http.user_agent;
    content:"WindowsPowerShell";
    reference:md5,3061050ea5532508e71b7ab663549ff4;
    classtype:trojan-activity;
    sid:2049428; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_12_01, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_04;
)

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.