Versions (4)
Version DetailsCurrent
Rev: 2 • Feb 11, 2015, 12:00 PMET MALWARE Linux/Xnote Keep-Alive
alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Linux/Xnote Keep-Alive"; flow:established,to_server; dsize:17; content:"|11 00 00 00 01 00 00 00 78 9c 4b 05 00 00 66 00 66|"; fast_pattern; reference:url,deependresearch.org/2015/02/linuxbackdoorxnote1-indicators.html; classtype:trojan-activity; sid:2020389; rev:2; metadata:created_at 2015_02_11, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;)
Feb 11, 2015, 12:00 PM
Oct 8, 2019, 12:00 PM
Sep 21, 2024, 3:00 AM
Oct 8, 2025, 9:38 PM
rules/emerging-malware.rules