alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE NightfallGT Mercurial Grabber"; flow:established,to_server; http.request_line; content:"POST /api/webhooks/"; startswith; http.host; content:"discord"; http.request_body; content:"|2c 22|username|22 3a 20 22|Mercurial|20|Grabber|22 2c 20 22|"; fast_pattern; reference:md5,252689e3688229ce5e3e26a2ef0a5bf1; reference:url,github.com/NightfallGT/Mercurial-Grabber; classtype:command-and-control; sid:2033197; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_06_28, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_30;)