alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED NoMercy Data Exfiltration M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/b?sysinfoother"; fast_pattern; startswith; content:"uid="; content:"version="; http.header_names; content:!"User-Agent"; content:!"Referer"; reference:url,blog.cyble.com/2022/07/07/nomercy-stealer-adding-new-features; classtype:trojan-activity; sid:2037740; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_07_11, deployment Perimeter, former_category MALWARE, malware_family NoMercy_Stealer, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_17, reviewed_at 2024_09_17;)