alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Keatep.B Checkin"; flow:established,to_server; http.uri; content:"&id="; nocase; content:"&v="; pcre:"/\?[0-9a-f]{5,}=\d+&id=\d+&v=\d+$/"; reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Virus%3AWin32%2FSality.AU; reference:url,microsoft.com/security/portal/threat/encyclopedia/entry.aspx?Name=TrojanSpy%3AWin32/Keatep.B; reference:md5,239aacf49bb6381fd71841fda4d4ee58; classtype:command-and-control; sid:2011336; rev:6; metadata:created_at 2010_09_28, malware_family Win32_Keatep_B, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_28;)