Versions (3)
Version DetailsCurrent
Rev: 4 • Oct 29, 2018, 12:00 PMET MALWARE TrueBot/Silence.Downloader CnC Checkin
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TrueBot/Silence.Downloader CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|file|22 3b 20|filename=|22|C|3a 5c|"; content:".DAT|22 3b 0d 0a|"; distance:0; content:"|0d 0a|Host Name|3a 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20|"; distance:0; content:"|0d 0a|OS Name|3a 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20|"; distance:0; content:"|0d 0a|OS Version|3a 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20|"; distance:0; http.header_names; content:!"Referer"; content:!"User-Agent"; content:!"Accept"; reference:md5,c2a00949ddacfed9ed2ef83a8cb44780; classtype:command-and-control; sid:2026559; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_29, deployment Perimeter, malware_family TrueBot, malware_family Silence_Downloader, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_09_16;)
Oct 29, 2018, 12:00 PM
Sep 16, 2020, 12:00 PM
Sep 21, 2024, 3:00 AM
May 30, 2025, 12:04 AM
rules/emerging-malware.rules