alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Arkei Stealer CnC Checkin (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/tratata.php"; startswith; bsize:12; fast_pattern; http.header_names; content:!"Referer"; content:!"User-Agent"; http.header; content:"Cache-Control: no-cache"; reference:url,blogs.blackberry.com/en/2022/02/threat-thursday-arkei-infostealer?utm_medium=social&utm_source=bambu; classtype:trojan-activity; sid:2035392; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_03_03, deployment Perimeter, malware_family Arkei, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_03, reviewed_at 2024_06_26;)