alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Sabsik.EN.D!ml CnC Checkin"; flow:established,to_server; content:"|a5 00 00 00 5a 4a 53 58|"; startswith; fast_pattern; content:"|05 00 00 00 42 44 53 4a 30 05 00 00 00 4b 4a 53 4a 30|"; distance:0; reference:md5,04b227d54c15f3ed16c20487ff898f15; classtype:trojan-activity; sid:2038735; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_09_02, deployment Perimeter, malware_family Win32_Sabsik_EN_D_ml, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_02;)