Rule History

SID: 2013935 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 8 • Nov 21, 2011, 12:00 PM

Message:

ET MALWARE Win32.Zbot.chas/Unruy.H Covert DNS CnC Channel TXT Response

Rule:

alert udp any 53 -> $HOME_NET any (msg:"ET MALWARE Win32.Zbot.chas/Unruy.H Covert DNS CnC Channel TXT Response"; content:"|C0 0C 00 10 00 01|"; content:"|00 dd dc|"; distance:4; within:3; content:!"v="; distance:0; content:!"p="; distance:0; content:!"spf2.0/"; content:!"spf1"; distance:0; content:!"|7c|"; distance:0; content:!"_domainkey"; classtype:command-and-control; sid:2013935; rev:8; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2011_11_21, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2019_07_26;)

Created:

Nov 21, 2011, 12:00 PM

Updated:

Jul 26, 2019, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-malware.rules