alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE RampantKitten APT TelB Python Variant - CnC Checkin M1"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?computer-name="; fast_pattern; content:"&username="; distance:0; http.accept_enc; content:"gzip, deflate"; http.header_names; content:!"Cache"; reference:url,research.checkpoint.com/2020/rampant-kitten-an-iranian-espionage-campaign; classtype:command-and-control; sid:2030895; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2020_09_22, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Rampant_Kitten, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_22;)