Rule History

alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE APT 41 LOWKEY Backdoor - Ping Command Inbound"; flow:established,from_server; app-layer-protocol:!http; content:"|00 00 00 00 00 FE 00|"; startswith; fast_pattern; content:"|00 00 00 00|"; distance:5; within:4; reference:url,www.fireeye.com/blog/threat-research/2019/10/lowkey-hunting-for-the-missing-volume-serial-id.html; classtype:command-and-control; sid:2028883; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2019_10_16, deployment Perimeter, malware_family LOWKEY, performance_impact Low, confidence Medium, signature_severity Major, tag APT41, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_24;)