alert tcp $HOME_NET any -> $EXTERNAL_NET 1024: (msg:"ET MALWARE Win32/Unknown Stealer CnC Log Exfil"; flow:established,to_server; content:"log|5b|split|5d|"; startswith; fast_pattern; pcre:"/^\x5b[A-Z]{2}\x5d\x20[A-Z0-9]{32}\x20\x5b[0-9]{2}\x2d[0-9]{2}\x2d[0-9]{4}\x20[0-9]{2}\x2d[0-9]{2}\x2d[0-9]{2}\x5d\x5bsplit\x5d/R"; reference:md5,62c49cd81d701e2ad31009bb012758b7; reference:url,twitter.com/James_inthe_box/status/1539639477676568576; classtype:command-and-control; sid:2037088; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_22, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_22;)