Rule History

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;)