ET MALWARE Inbound PowerShell Executing Base64 Decoded VBE from Temp 2018-11-29

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Inbound PowerShell Executing Base64 Decoded VBE from Temp 2018-11-29";
    flow:established,from_server;
    http.stat_code;
    content:"200";
    file.data;
    content:"|3a 3a|FromBase64String"; nocase;
    content:"-Path|20|C|3a 5c|windows|5c|temp|5c|"; distance:0; nocase;
    content:"start-process|20|c|3a 5c|windows|5c|system32|5c|wscript.exe|20|-ArgumentList|20 22|c|3a 5c|windows|5c|temp|5c|"; distance:0; nocase; fast_pattern;
    content:".vbe|22|"; within:20;
    reference:url,www.clearskysec.com/muddywater-operations-in-lebanon-and-oman/;
    classtype:trojan-activity;
    sid:2026677; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_11_29, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag PowerShell, tag Obfuscated, updated_at 2020_11_18;
)