alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/BlackGuard Stealer Exfil Activity"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?user="; content:"&coockieCount="; distance:0; fast_pattern; content:"&searche="; distance:0; http.request_body; content:"Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22 28|"; content:"|29 5f 5b|"; within:255; content:"|5d 2e|"; within:255; content:"|22 0d 0a|Content|2d|Type|3a 20|application|2f|octet|2d|stream|0d 0a 0d 0a|PK|03 04|"; within:53; reference:url,app.any.run/tasks/3c8c54c1-d39f-4a14-af0c-242fd364ef15/; reference:md5,bb5f22fc74149158b637a2bac5064ddb; classtype:command-and-control; sid:2035398; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_03_07, deployment Perimeter, malware_family MSIL_BlackGuard, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_07;)