Rule History

SID: 2027118 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 3 • Mar 27, 2019, 12:00 PM

Message:

ET MALWARE W32/VBS.SLoad.Backdoor Initial Base64 Encoded OK Server Response

Rule:

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE W32/VBS.SLoad.Backdoor Initial Base64 Encoded OK Server Response"; flow:established,to_client; http.header; content:"Authorization|3a 20|b2sgb2s="; reference:url,www.fireeye.com/blog/threat-research/2019/03/winrar-zero-day-abused-in-multiple-campaigns.html; reference:md5,3aabc9767d02c75ef44df6305bc6a41f; classtype:trojan-activity; sid:2027118; rev:3; metadata:created_at 2019_03_27, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_28;)

Created:

Mar 27, 2019, 12:00 PM

Updated:

Aug 28, 2020, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 24, 2025, 8:37 PM

Filename:

rules/emerging-malware.rules