alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Bad PDF Editor Tamperedchef Install Confirmation M1";
flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/status/Download|20|Complete|3f|v|3d|"; startswith; fast_pattern;
pcre:"/^(?:\d{1,2}\x2e){1,4}\d/R";
content:"|26|p|3d|PDFEditor|26|code|3d|"; within:18;
reference:url,truesec.com/hub/blog/tamperedchef-the-bad-pdf-editor;
classtype:trojan-activity;
sid:2065101; rev:1;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_10_08, deployment Perimeter, malware_family Tamperedchef, confidence High, signature_severity Critical, tag c2, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_08, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
target:src_ip;
)