alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Gamaredon CnC Activity (POST) M4"; flow:established,to_server; http.method; content:"POST"; http.accept; content:"application/dns-json"; http.header_names; content:!"Referer"; content:"user-agent"; http.user_agent; content:"|28|macintosh|3b 20|intel|20|mac|20|os|20|x|20|10|5f|15|5f|6|29 20|applewebkit|2f|605|2e|1|2e|15|20 28|khtml|2c 20|like|20|gecko|29 20|version|2f|14|2e|0|2e|1|20|safari|2f|605|2e|1|2e|15"; bsize:107; fast_pattern; http.host; content:"t.me"; bsize:4; http.content_len; content:"0"; bsize:1; reference:md5,4924a85d0c77c9b7b38faaab94636d9a; reference:url,twitter.com/StopMalvertisin/status/1645771054462402560; classtype:trojan-activity; sid:2044919; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_04_11, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_Gamaredon, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_11;)