Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Generic VBS Backdoor Sending Windows Information (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/api/alert"; fast_pattern; bsize:10; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest.5)"; bsize:57; http.request_body; content:"|7b 22|comp|22 3a 20 22|"; startswith; content:"|22 2c 22|user|22 3a 20|"; distance:0; content:"|22 2c 22|version|22 3a 20|"; distance:0; content:"|22 2c 22|arch|22 3a 20|"; distance:0; content:"|22 2c 22|caption|22 3a 20|"; distance:0; content:"Windows"; distance:0; http.header_names; content:!"Referer"; reference:md5,182fdcc1c5510b28eaadf9c0ce207932; classtype:trojan-activity; sid:2049002; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_10_31, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_10_31, reviewed_at 2023_10_31; target:src_ip;)