alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE RampantKitten APT TelB Python Variant - CnC Checkin M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?Usrname="; fast_pattern; content:"&0S-Name="; distance:0; content:"&Pt-Name="; distance:0; content:"&ToolsIsActive"; endswith; http.user_agent; content:"Python-urllib/"; startswith; reference:url,research.checkpoint.com/2020/rampant-kitten-an-iranian-espionage-campaign; classtype:command-and-control; sid:2030898; rev:1; metadata: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;)