Rule History

SID: 2017991 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 6 • Apr 9, 2011, 12:00 PM

Message:

ET MALWARE Cybergate/Rebhip/Spyrat Backdoor Keepalive Response

Rule:

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Cybergate/Rebhip/Spyrat Backdoor Keepalive Response"; flow:to_server,established; dsize:<100; content:"pong|7c|"; depth:5; classtype:trojan-activity; sid:2017991; rev:6; metadata:created_at 2011_04_09, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)

Created:

Apr 9, 2011, 12:00 PM

Updated:

Jul 26, 2019, 12:00 PM

DB Created:

Apr 9, 2011, 12:00 PM

DB Updated:

Dec 12, 2025, 10:34 PM

Filename:

rules/emerging-malware.rules