alert tcp $HOME_NET any -> $HOME_NET [139,445] (msg:"ET MALWARE Skeleton Key Filename in SMB2 Traffic"; flow:established,to_server; content:"|FE|SMB|40|"; offset:4; depth:5; content:"|12 00|"; distance:0; content:"o|00|l|00|e|00|6|00|4|00|.|00|d|00|l|00|l"; distance:8; within:17; reference:url,www.secureworks.com/cyber-threat-intelligence/threats/skeleton-key-malware-analysis; classtype:trojan-activity; sid:2020383; rev:4; metadata:created_at 2015_02_07, signature_severity Major, updated_at 2019_07_26;)