alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Win32/SaintStealer Data Exfiltration Attempt M2"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/receive.php?"; startswith; pcre:"/^[0-9]{9}$/R"; http.header_names; content:!"User-Agent"; content:!"Referer"; http.request_body; content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|"; content:"|40|"; distance:0; pcre:"/^[A-F0-9]{32}/R"; content:".zip"; distance:0; content:"|0d 0a 0d 0a|PK|03 04|"; within:400; content:"|00 00 00|"; distance:1; content:"Screenshot.jpg"; distance:20; within:300; fast_pattern; threshold:type limit, seconds 120, count 1, track by_src; reference:md5,3659201ce95a682f5e2b6c019342b0e4; classtype:trojan-activity; sid:2039022; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_09_27, deployment Perimeter, former_category MALWARE, malware_family SaintStealer, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_18, reviewed_at 2024_09_18;)