alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED BlackGuard_v2 Data Exfiltration Observed"; flow:established,to_server; content:"POST"; content:"?user="; content:"&hwid="; distance:0; content:"&antivirus="; distance:0; content:"&os=Windows"; distance:0; content:"&passCount="; distance:0; content:"&coockieCount="; distance:0; fast_pattern; content:"&walletCount="; distance:0; content:"&telegramCount="; distance:0; content:"&vpnCount="; distance:0; content:"&ftpCount="; distance:0; content:"&country="; content:"multipart/form-data|3b 20|boundary="; distance:0; reference:url,www.zscaler.com/blogs/security-research/analysis-blackguard-new-info-stealer-malware-being-sold-russian-hacking; reference:url,blog.cyble.com/2022/04/01/dissecting-blackguard-info-stealer/; classtype:trojan-activity; sid:2035716; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_01, deployment SSLDecrypt, former_category MALWARE, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_12, reviewed_at 2024_09_12;)