Versions (3)
Version DetailsCurrent
Rev: 3 • Apr 4, 2015, 12:00 PMET MALWARE NanoCore RAT Keepalive 4
alert tcp $HOME_NET any -> $EXTERNAL_NET [1024:] (msg:"ET MALWARE NanoCore RAT Keepalive 4"; flow:established,to_server; dsize:84; content:"|50 00 00 00|"; depth:4; content:!"|00 00 00 00|"; within:4; threshold:type both, track by_src, count 10, seconds 120; flowbits:set,ET.NanoCore; flowbits:noalert; reference:md5,bf994dce3712fb66afa4a2ce5b3ceee4; reference:url,medium.com/@the_abjuri5t/nanocore-rat-hunting-guide-cb185473c1e0; classtype:trojan-activity; sid:2046913; rev:3; metadata:attack_target Client_Endpoint, created_at 2015_04_04, deployment Perimeter, malware_family NanoCore, performance_impact Moderate, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_07_26, former_sid 2810453;)
Apr 4, 2015, 12:00 PM
Jul 26, 2023, 12:00 PM
Jul 26, 2023, 10:00 PM
Aug 20, 2025, 9:35 PM
rules/emerging-malware.rules