Rule History

SID: 2066365 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 1 • Dec 18, 2025, 12:00 PM

Message:

ET MALWARE ZeitLoader IP Address Check User-Agent (TimeClient/1.0)

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ZeitLoader IP Address Check User-Agent (TimeClient/1.0)"; flow:established,to_server; http.user_agent; bsize:14; content:"TimeClient|2f|1|2e|0"; reference:md5,eb5bd49b6eef60ff85892ef7c8015b01; classtype:trojan-activity; sid:2066365; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2025_12_18, deployment Perimeter, malware_family ZeitLoader, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_12_18;)

Created:

Dec 18, 2025, 12:00 PM

Updated:

Dec 18, 2025, 12:00 PM

DB Created:

Dec 18, 2025, 10:34 PM

DB Updated:

Dec 19, 2025, 10:34 PM

Filename:

rules/emerging-malware.rules