alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Win32/Wacatac.B!ml Data Exfiltration"; flow:established,to_server; flowbits:isset,ET.Wacatac_B_Checkin; content:"|23 23 23|"; content:"|23 23 23|"; distance:0; content:"|23 23 23|"; distance:0; content:"PK|03 04|"; distance:0; byte_test:1,<=,20,0,relative; content:"Google/Chrome/User|20|Data/"; fast_pattern; reference:md5,082ba31c83e3fc1114b6444111e88019; classtype:trojan-activity; sid:2037236; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_30, deployment Perimeter, former_category MALWARE, malware_family Wacatac_B_ml, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_30;)