alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE MALWARE Torpig/Anserin/Sinowal MSID User Agent"; flow:to_server,established; content:"User-Agent\:"; nocase; pcre:"/User-Agent\:[^\n]+MSID/"; classtype:trojan-activity; sid:2002875; rev:3;)


User-Agents often look like so: User-Agent: MSID [D325827CD353DC345984A8A7F74AD586]|gucci|101

URLs requested are just long strings of characters, 300 or more.

-- MattJonkman - 27 Feb 2007


Topic revision: r2 - 2007-02-27 - MattJonkman
 
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