Rule History

SID: 2033950 • Source: et/open

Versions (5)

Version DetailsCurrent

Rev: 1 • Sep 14, 2021, 12:00 PM

Message:

ET MALWARE Win32/Delf.OKR Variant CnC M2

Rule:

alert tcp $HOME_NET any -> $EXTERNAL_NET 1024: (msg:"ET MALWARE Win32/Delf.OKR Variant CnC M2"; flow:established,to_server; stream_size:server,<,5; dsize:4; content:"|6d 35 30 0a|"; startswith; reference:md5,320564554767ddd328932997067f64a5; classtype:command-and-control; sid:2033950; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_09_14, deployment Perimeter, malware_family Win32_Delf_OKR, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_14;)

Created:

Sep 14, 2021, 12:00 PM

Updated:

Sep 14, 2021, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 8, 2025, 9:34 PM

Filename:

rules/emerging-malware.rules