ET MALWARE PS1/Kimsuky CnC Exfil (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.user_agent;
content:"Mozilla|2f|5|2e|0|20 28|Windows|20|NT|20|10|2e|x|3b 20|Win64|3b 20|x64|29 20|AppleWebKit|2f|537|2e|36|20 28|KHTML|2c 20|like|20|Gecko|29 20|Chremo|2f|87|2e|0|2e|4280|2e|141|20|Safari|2f|537|2e|36|20|Edgo|2f|87|2e|0|2e|664|2e|75"; bsize:132; fast_pattern;
http.request_body;
content:"Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|MAX|5f|FILE|5f|SIZE|22 0d 0a|1000000";
Raw source ET MALWARE PS1/Kimsuky CnC Exfil (POST) · 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/Kimsuky CnC Exfil (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.user_agent;
    content:"Mozilla|2f|5|2e|0|20 28|Windows|20|NT|20|10|2e|x|3b 20|Win64|3b 20|x64|29 20|AppleWebKit|2f|537|2e|36|20 28|KHTML|2c 20|like|20|Gecko|29 20|Chremo|2f|87|2e|0|2e|4280|2e|141|20|Safari|2f|537|2e|36|20|Edgo|2f|87|2e|0|2e|664|2e|75"; bsize:132; fast_pattern;
    http.request_body;
    content:"Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|MAX|5f|FILE|5f|SIZE|22 0d 0a|1000000";
    reference:md5,5fe80f1b1e90815886a0553f2c322cc7;
    reference:url,twitter.com/0x0v1/status/1683434524938588162;
    classtype:trojan-activity;
    sid:2046892; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_07_25, deployment Perimeter, malware_family Kimsuky, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_07_25;
)

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