Versions (4)
Version DetailsCurrent
Rev: 4 • Jun 22, 2022, 12:00 PMET HUNTING Suspicious Zipped Filename in Outbound POST Request (Steam_htmlcache.txt)
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspicious Zipped Filename in Outbound POST Request (Steam_htmlcache.txt)"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"PK|03 04|"; byte_test:1,<=,20,0,relative; content:"Steam_htmlcache.txt"; distance:0; nocase; fast_pattern; classtype:trojan-activity; sid:2037091; rev:4; metadata:attack_target Client_Endpoint, created_at 2022_06_22, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Stealer, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_22, reviewed_at 2024_04_17;)
Jun 22, 2022, 12:00 PM
Aug 22, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 2, 2025, 9:35 PM
rules/emerging-hunting.rules