Rule History

SID: 2013146 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 3 • Jun 30, 2011, 12:00 PM

Message:

ET SHELLCODE Possible %u41%u41%u41%u41 UTF-8 Heap Spray Attempt

Rule:

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET SHELLCODE Possible %u41%u41%u41%u41 UTF-8 Heap Spray Attempt"; flow:established,to_client; content:"%u41%u41%u41%u41"; nocase; fast_pattern; classtype:shellcode-detect; sid:2013146; rev:3; metadata:created_at 2011_06_30, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;)

Created:

Jun 30, 2011, 12:00 PM

Updated:

Oct 8, 2019, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Oct 8, 2025, 9:38 PM

Filename:

rules/emerging-shellcode.rules