Rule History

SID: 2020177 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 3 • Jan 13, 2015, 12:00 PM

Message:

ET MALWARE Skeleton Key Filename in SMB Traffic (Unicode)

Rule:

alert tcp $HOME_NET any -> $HOME_NET [139,445] (msg:"ET MALWARE Skeleton Key Filename in SMB Traffic (Unicode)"; flow:to_server,established; content:"|FF|SMB|a2|"; offset:4; depth:5; byte_test:1,&,0x80,6,relative; content:"|5c 00|o|00|l|00|e|00|6|00|4|00|.|00|d|00|l|00|l"; reference:url,www.secureworks.com/cyber-threat-intelligence/threats/skeleton-key-malware-analysis; classtype:trojan-activity; sid:2020177; rev:3; metadata:created_at 2015_01_13, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)

Created:

Jan 13, 2015, 12:00 PM

Updated:

Jul 26, 2019, 12:00 PM

DB Created:

Jan 13, 2015, 12:00 PM

DB Updated:

Oct 13, 2025, 9:34 PM

Filename:

rules/emerging-malware.rules