Versions (3)
Version DetailsCurrent
Rev: 1 • Jan 24, 2024, 12:00 PMET MALWARE Win32/Cobalt Strike CnC Activity M2
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Cobalt Strike CnC Activity M2"; flow:established,to_server; urilen:<6; http.method; content:"GET"; http.host; pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/W"; http.user_agent; content:"Mozilla|2f|4|2e|0|20 28|compatible|3b 20|MSIE|20|8|2e|0|3b 20|Windows|20|NT|20|5|2e|1|3b 20|Trident|2f|4|2e|0|3b 20|LBBROWSER|29|"; bsize:74; fast_pattern; http.connection; content:"Keep-Alive"; bsize:10; http.header; content:"Cache|2d|Control|3a 20|no|2d|cache|0d 0a|"; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a|Cache-Control|0d 0a 0d 0a|"; reference:md5,c0886a12508c65719e3ec8de02c1ba80; reference:url,twitter.com/malwrhunterteam/status/1750138795276566550; classtype:trojan-activity; sid:2050422; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_01_24, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, updated_at 2024_01_24, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;)
Jan 24, 2024, 12:00 PM
Jan 24, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 21, 2024, 3:00 AM
rules/emerging-malware.rules