alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Sabsik.FL.B!ml Exfil"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/stwittc/upwawsfrg.php"; bsize:22; fast_pattern; http.user_agent; content:"ZZ|23 5f|"; startswith; content:"|5f|ZZ|23|"; endswith; reference:md5,19670ba347cba8a1a3ab490ffe672880; classtype:trojan-activity; sid:2038687; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_08_30, deployment Perimeter, malware_family Win32_Sabsik_FL_B_ml, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_30, reviewed_at 2024_12_11;)