Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Win32/Stealc Active C2 Responding with browsers Config"; flow:established,to_client; http.stat_code; content:"200"; fast_pattern; file.data; base64_decode:offset 0; base64_data; content:"Google|20|Chrome|7c|"; content:"|5c|User|20|Data|7c|"; flowbits:isset,ET.stealc.browsers; flowbits:unset,ET.stealc.browsers; reference:url,blog.sekoia.io/stealc-a-copycat-of-vidar-and-raccoon-infostealers-gaining-in-popularity-part-1/; classtype:command-and-control; sid:2044245; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_02_20, deployment Perimeter, deprecation_reason Performance, malware_family Stealc, confidence High, signature_severity Major, tag Stealer, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;)