alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Likely CryptMEN FakeAV Download vclean"; flow:established,to_client; http.header; content:"filename=|22|vclean"; fast_pattern; nocase; content:".exe"; nocase; within:20; classtype:trojan-activity; sid:2014028; rev:4; metadata:created_at 2011_12_15, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_22;)