alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN [eSentire] Win32/GandCrab v4 Ransomware CnC? Activity"; flow:established,to_server; content:"POST"; http_method; pcre:"/\.(bmp|png|gif|jpg)$/U"; content:"Content-Type|3a 20|multipart/form-data"; http_header; content:"Mozilla/5.0 (Windows NT 6.1|3b 20|WOW64"; http_user_agent; content:"wfKD6iudumBkmp"; depth:14; fast_pattern; http_client_body; pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/Psi"; threshold: type limit, count 1, seconds 60, track by_src; http_header_names; content:!"Referer"; content:!"Accept"; metadata: former_category TROJAN; classtype:trojan-activity; sid:2025638; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, deployment Perimeter, tag Ransomware, signature_severity Major, created_at 2018_07_04, malware_family GandCrab?, performance_impact Low, updated_at 2018_07_04;)

Added 2018-07-04 17:47:42 UTC


Topic revision: r1 - 2018-07-04 - TWikiGuest
 
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