alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA402/Molerats Related VBS Retrieval"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/xx/f_Skoifa.vbs"; fast_pattern; bsize:16; http.user_agent; content:"Mozilla/4.0|20|(compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest.5)"; bsize:57; reference:url,www.cadosecurity.com/post/threat-group-uses-voice-changing-software-in-espionage-attempt; reference:md5,27d85a6aff129deb07048a735de1c884; classtype:trojan-activity; sid:2032530; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_04_07, deployment Perimeter, malware_family Molerats, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_04_07;)