Rule History

SID: 2044552 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 1 • Mar 9, 2023, 12:00 PM

Message:

ET MALWARE Win32/I'm_Better Stealer CnC Checkin

Rule:

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/I'm_Better Stealer CnC Checkin"; flow:established,to_server; dsize:60; content:"SFdJRDoge"; startswith; fast_pattern; base64_decode:bytes 60, offset 0; base64_data; content:"HWID|3a 20 7b|"; pcre:"/^[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}\x7d/R"; reference:md5,e9df653567149f789852c2dab16f46bb; reference:url,www.bridewell.com/insights/news/detail/threat-advisory-bridewell-malware-impersonating-online-tools-and-video-games; classtype:trojan-activity; sid:2044552; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_03_09, deployment Perimeter, malware_family Win32_I_m_Better, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_09;)

Created:

Mar 9, 2023, 12:00 PM

Updated:

Mar 9, 2023, 12:00 PM

DB Created:

Mar 9, 2023, 10:00 PM

DB Updated:

Aug 25, 2025, 9:35 PM

Filename:

rules/emerging-malware.rules