Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Downloader.VB.TX/Backdoor.Win32.DSSdoor!IK Checkin"; flow:established,to_server; http.uri; content:"/tx.txt"; http.header; content:" Microsoft URL Control -"; classtype:command-and-control; sid:2003646; rev:10; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_21;)