Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ACR Stealer Data Exfiltration Attempt M2"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:5; content:"/Up/b"; fast_pattern; http.content_type; bsize:39; content:"application/octet-stream|3b 20|boundary|3d 2d 2d 2d 2d|"; http.request_body; content:"PK|03 04 14|"; startswith; reference:url,malpedia.caad.fkie.fraunhofer.de/details/win.acr_stealer; reference:url,threatfox.abuse.ch/browse/malware/win.acr_stealer/; classtype:trojan-activity; sid:2052676; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_05_16, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_05_16; target:src_ip;)