Rule History

SID: 2012778 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 4 • May 3, 2011, 12:00 PM

Message:

ET DELETED Suspicious IAT NamedPipe - May Indicate Reverse Shell/Backdoor Functionality

Rule:

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED Suspicious IAT NamedPipe - May Indicate Reverse Shell/Backdoor Functionality"; flowbits:isset,ET.http.binary; flow:established,to_client; content:"NamedPipe"; nocase; fast_pattern:only; pcre:"/(Create|Connect|Peek)NamedPipe/i"; reference:url,sans.org/reading_room/whitepapers/malicious/rss/_33649; classtype:misc-activity; sid:2012778; rev:4; metadata:created_at 2011_05_03, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_23;)

Created:

May 3, 2011, 12:00 PM

Updated:

Jun 23, 2021, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Oct 17, 2025, 8:36 PM

Filename:

rules/emerging-deleted.rules