Versions (3)
Version DetailsCurrent
Rev: 1 • Jan 16, 2024, 12:00 PMET MALWARE BackConnect CnC Activity (Start VNC) M1
alert tcp-pkt $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE BackConnect CnC Activity (Start VNC) M1"; flow:established,to_client; flowbits:isset,ET.BackConnect; content:"|4a 01 4f 97 05|"; startswith; dsize:13; threshold:type limit,track by_src,count 1,seconds 300; reference:url,netresec.com/?page=Blog&month=2022-10&post=IcedID-BackConnect-Protocol; reference:url,twitter.com/netresec/status/1577966512459087874; reference:url,twitter.com/Unit42_Intel/status/1577773890012594177; classtype:command-and-control; sid:2050086; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2024_01_16, deployment Perimeter, malware_family BackConnect, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_01_16;)
Jan 16, 2024, 12:00 PM
Jan 16, 2024, 12:00 PM
Jan 16, 2024, 11:00 PM
Aug 15, 2025, 8:34 PM
rules/emerging-malware.rules