Versions (4)
Version DetailsCurrent
Rev: 1 • Nov 6, 2023, 12:00 PMET MALWARE Win32/Stealc/Vidar Stealer Style Headers In HTTP POST M1
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Stealc/Vidar Stealer Style Headers In HTTP POST M1"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"form-data|3b 20|name=|22|token|22 0d 0a 0d 0a|"; content:"form-data|3b 20|name=|22|build_id|22 0d 0a 0d 0a|"; fast_pattern; distance:0; content:"form-data|3b 20|name=|22|mode|22 0d 0a 0d 0a|"; flowbits:set,ET.stealc.plugins; threshold:type limit,seconds 300,count 1,track by_src; reference:md5,15759ca0c25955989b2ff7a8c151f6f8; classtype:trojan-activity; sid:2049087; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_11_06, deployment Perimeter, malware_family Stealc, malware_family VidarStealer, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_10, reviewed_at 2023_11_06; target:src_ip;)
Nov 6, 2023, 12:00 PM
Nov 10, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 18, 2025, 8:35 PM
rules/emerging-malware.rules