alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE JS/Nemucod requesting EXE payload 2016-02-06"; flow:established,to_server; http.uri; content:".vbn"; nocase; endswith; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b|"; fast_pattern; startswith; http.header_names; content:!"Referer|0d 0a|"; content:!"Cookie|0d 0a|"; classtype:trojan-activity; sid:2023875; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_02_06, deployment Perimeter, malware_family Nemucod, performance_impact Significant, confidence High, signature_severity Major, updated_at 2024_04_22;)