alert tcp $HOME_NET any -> $HOME_NET [139,445] (msg:"ET MALWARE US-CERT TA14-353A Network Propagation Wiper"; flow:to_server,established; content:"|FF|SMB|a2|"; offset:4; depth:5; byte_test:1,!&,0x80,6,relative; content:"taskhost"; content:".exe"; distance:2; within:4; reference:url,www.us-cert.gov/ncas/alerts/TA14-353A; classtype:trojan-activity; sid:2020023; rev:1; metadata:created_at 2014_12_23, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)