Rule History

SID: 2017890 • Source: et/open

Versions (5)

Version DetailsCurrent

Rev: 2 • Dec 20, 2013, 12:00 PM

Message:

ET HUNTING SUSPICIOUS SMTP EXE - RAR file with .scr filename inside

Rule:

alert smtp $EXTERNAL_NET any -> $SMTP_SERVERS any (msg:"ET HUNTING SUSPICIOUS SMTP EXE - RAR file with .scr filename inside"; flow:established; content:"|0D 0A 0D 0A|UmFyI"; pcre:"/^[A-Za-z0-9\/\+\x0D\x0A]+?(LnNjc|Euc2Ny|S5zY3)/R"; classtype:bad-unknown; sid:2017890; rev:2; metadata:created_at 2013_12_20, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)

Created:

Dec 20, 2013, 12:00 PM

Updated:

Jul 26, 2019, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Dec 4, 2025, 10:34 PM

Filename:

rules/emerging-hunting.rules