alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Fickle Stealer C2 Server Tasking"; flow:established,to_client; http.stat_code; content:"200"; file.data; content:"|7b 22|status|22 3a 20 22|Success|22 2c 20 22|k|22 3a 20 22|"; startswith; fast_pattern; pcre:"/^[a-zA-Z0-9]{5,15}\x22\x2c\x20/R"; content:"|22|c|22 3a|"; within:4; reference:url,e9bc44cf548a70e7285499209973faf44b7374dece1413dfcdc03bf25a6c599c; reference:md5,75b9ef9142a78671d449c8d22ab6be14; classtype:trojan-activity; sid:2053779; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_06_20, deployment Perimeter, malware_family Fickle_Stealer, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_06_20; target:dest_ip;)