Rule History

alert tls $EXTERNAL_NET [443,4443] -> $HOME_NET any (msg:"ET MALWARE Possible Upatre/Dyre/Kegotip SSL Cert Sept 8 2015"; flow:established,to_client; tls.certs; content:"|0b 30 09 06 03 55 04 06 13 02 55 53|"; content:"|55 04 08|"; distance:0; content:"|55 04 07|"; distance:0; content:"|55 04 0a|"; distance:0; byte_extract:1,1,olength,relative; content:!"|2e|"; within:olength; content:!"|20|"; within:olength; pcre:"/^[a-zA-Z0-9]+[01]/R"; content:"|55 04 03|"; byte_test:1,>,0x40,2,relative; byte_test:1,<,0x5B,2,relative; content:"|55 04 0b|"; distance:0; byte_extract:1,1,oulength,relative; content:!"|2e|"; within:oulength; content:!"|20|"; within:oulength; pcre:"/^[a-zA-Z0-9]+[01]/R"; content:"|55 04 03|"; content:"|2a 86 48 86 f7 0d 01 09 01|"; distance:0; content:!"support@"; distance:0; pcre:"/^.{2}[A-Za-z][a-z]*?@[a-z]+\.com0/R"; content:".com0"; fast_pattern:only; reference:md5,52faadf69c492e5bea1b3ad77fd7e8b1; reference:url,us-cert.gov/ncas/alerts/TA14-300A; classtype:trojan-activity; sid:2021749; rev:8; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2015_09_09, deployment Perimeter, malware_family Upatre, confidence Medium, signature_severity Critical, tag SSL_Malicious_Cert, tag Exploit_Kit, tag Downloader, tag Upatre, updated_at 2024_04_04;)