alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/PSW.Agent.SUD Zipped Data Exfil"; flow:established,to_server; flowbits:isset,ET.wacatacstealer; stream_size:server,<,20; dsize:1024; content:"|23 23 23|"; startswith; fast_pattern; content:"|23 23 23|"; within:20; content:"|23 23 23|"; within:86; pcre:"/^###\d+###[a-zA-Z0-9\-\.]{2,63}###\x00+$/"; reference:md5,023e3c7d1de10006b4c52d09aadefc1f; classtype:credential-theft; sid:2037240; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_30, deployment Perimeter, malware_family MSIL_PSW_Agent_SUD, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_14, reviewed_at 2024_12_11;)