Versions (4)
Version DetailsCurrent
Rev: 1 • Oct 16, 2019, 12:00 PMET MALWARE APT 41 LOWKEY Backdoor - Initalisation Bytes Received from CnC
alert tcp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"ET MALWARE APT 41 LOWKEY Backdoor - Initalisation Bytes Received from CnC"; flow:established,from_server; content:"|FF FF 01 00 00 01 00 00 00 00 00 00|"; startswith; reference:url,www.mandiant.com/resources/blog/lowkey-hunting-missing-volume-serial-id; classtype:command-and-control; sid:2028863; rev:1; 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 High, signature_severity Major, tag APT41, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_02;)
Oct 16, 2019, 12:00 PM
Jun 2, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 22, 2025, 9:34 PM
rules/emerging-malware.rules