Rule History

SID: 2045271 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 2 • May 1, 2023, 12:00 PM

Message:

ET MALWARE DNS Query to RokRat Domain (link .b4a .app)

Rule:

alert dns $HOME_NET any -> any any (msg:"ET MALWARE DNS Query to RokRat Domain (link .b4a .app)"; dns.query; content:"link.b4a.app"; nocase; bsize:12; reference:url,research.checkpoint.com/2023/chain-reaction-rokrats-missing-link/; classtype:trojan-activity; sid:2045271; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_05_01, deployment Perimeter, malware_family Rokrat, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_23, reviewed_at 2023_08_23;)

Created:

May 1, 2023, 12:00 PM

Updated:

Aug 23, 2023, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Aug 25, 2025, 9:35 PM

Filename:

rules/emerging-malware.rules