alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Chafer Win32/TREKX Uploading to CnC? (Modified CAB)"; flow:established,to_server; content:"POST"; http_method; content:".aspx"; http_uri; isdataat:!1,relative; content:"Content-Disposition|3a 20|form-data|3b|"; http_client_body; content:"TREC"; http_client_body; distance:0; fast_pattern; pcre:"/^[\x20-\x7e\r\n]{0,13}[^\x20-\x7e\r\n]/RPs"; http_content_type; content:"multipart|2f|form-data|3b|"; http_content_len; byte_test:0,>=,256,0,string,dec; http_header_names; content:!"Referer"; metadata: former_category TROJAN; reference:url,securityintelligence.com/posts/observations-of-itg07-cyber-operations/; classtype:trojan-activity; sid:2027480; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, deployment Perimeter, tag Chafer, tag APT39, signature_severity Major, created_at 2019_06_17, malware_family TREKX, performance_impact Low, updated_at 2019_06_17;)

Added 2019-06-17 19:03:20 UTC


Topic revision: r1 - 2019-06-17 - TWikiGuest
 
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