Versions (3)
Version DetailsCurrent
Rev: 6 • Jun 16, 2015, 12:00 PMET MALWARE Backdoor.Elise CnC Beacon 1 M1
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Backdoor.Elise CnC Beacon 1 M1"; flow:to_server,established; http.method; content:"GET"; http.uri; content:"/page_"; nocase; fast_pattern; content:".html"; nocase; pcre:"/\/[a-f0-9]{8}\/page_\d{8,10}\.html$/i"; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|MSIE 8.0"; startswith; http.header_names; content:!"Accept-"; content:!"Referer|0d 0a|"; reference:md5,23ace716ec34bfd9c98efd79b23a01af; reference:url,github.com/pan-unit42/iocs/tree/master/lotusblossom; classtype:command-and-control; sid:2021274; rev:6; metadata:attack_target Client_Endpoint, created_at 2015_06_16, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_10_01, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)
Jun 16, 2015, 12:00 PM
Oct 1, 2020, 12:00 PM
Sep 21, 2024, 3:00 AM
May 30, 2025, 12:04 AM
rules/emerging-malware.rules