alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE FakeYak or Related Infection Checkin 1"; flow:established,to_server; http.uri; content:"&fff="; content:"&coid="; content:"do="; content:"&IP="; nocase; content:"lct="; nocase; reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Rogue%3aWin32%2fFakeYak; classtype:command-and-control; sid:2011396; rev:5; metadata:created_at 2010_09_28, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_10;)