Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE APT28 Uploader Variant CnC Beacon"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"."; content:"/?"; distance:0; content:"="; distance:1; within:3; pcre:"/\/?[a-zA-Z0-9]{1,3}=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/"; http.host; content:!"google.com"; endswith; http.start; content:".1|0d 0a|User-Agent|3a 20|Mozi"; fast_pattern; http.header_names; content:!"Content-Type|0d 0a|"; content:!"Referer|0d 0a|"; content:!"Accept"; classtype:targeted-activity; sid:2023916; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_12_07, deployment Perimeter, malware_family APT28_Uploader, performance_impact Significant, signature_severity Major, tag c2, updated_at 2024_04_22, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)