#alert tls $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET TROJAN ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Quakbot CnC?)"; flow:established,from_server; content:"|55 04 06|"; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 08|"; distance:0; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 07|"; distance:0; pcre:"/^.{2}[A-Z][a-z]+(?:\x20[A-Z][a-z]+)?[01]/Rs"; content:"|55 04 09|"; fast_pattern; distance:0; pcre:"/^.{2}\d{2,3}(?:\x20[A-Z][a-z]+\.?){1,3}[01]/Rs"; content:!"|2a 86 48 86 f7 0d 01 09 01|"; distance:0; content:"|55 04 0a|"; distance:0; content:"|55 04 0b|"; distance:0; content:"|55 04 03|"; distance:0; pcre:"/^.(.[a-z]{4,12}\.(?:us|org|net|biz|info|mobi|com)[01]).*?\x55\x04\x03.\1/Rs"; metadata: former_category TROJAN; reference:url,sslbl.abuse.ch; classtype:trojan-activity; sid:2022868; rev:4; metadata:attack_target Client_Endpoint, deployment Perimeter, tag SSL_Malicious_Cert, signature_severity Major, created_at 2016_06_06, updated_at 2016_07_01;)

Added 2019-07-09 18:22:47 UTC


alert tls $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET TROJAN ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Quakbot CnC?)"; flow:established,from_server; content:"|55 04 06|"; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 08|"; distance:0; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 07|"; distance:0; pcre:"/^.{2}[A-Z][a-z]+(?:\x20[A-Z][a-z]+)?[01]/Rs"; content:"|55 04 09|"; fast_pattern; distance:0; pcre:"/^.{2}\d{2,3}(?:\x20[A-Z][a-z]+\.?){1,3}[01]/Rs"; content:!"|2a 86 48 86 f7 0d 01 09 01|"; distance:0; content:"|55 04 0a|"; distance:0; content:"|55 04 0b|"; distance:0; content:"|55 04 03|"; distance:0; pcre:"/^.(.[a-z]{4,12}\.(?:us|org|net|biz|info|mobi|com)[01]).*?\x55\x04\x03.\1/Rs"; reference:url,sslbl.abuse.ch; classtype:trojan-activity; sid:2022868; rev:4; metadata:attack_target Client_Endpoint, deployment Perimeter, tag SSL_Malicious_Cert, signature_severity Major, created_at 2016_06_06, updated_at 2016_07_01;)

Added 2017-08-07 21:17:52 UTC


alert tls $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET TROJAN ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Quakbot CnC?)"; flow:established,from_server; content:"|55 04 06|"; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 08|"; distance:0; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 07|"; distance:0; pcre:"/^.{2}[A-Z][a-z]+(?:\x20[A-Z][a-z]+)?[01]/Rs"; content:"|55 04 09|"; fast_pattern; distance:0; pcre:"/^.{2}\d{2,3}(?:\x20[A-Z][a-z]+\.?){1,3}[01]/Rs"; content:!"|2a 86 48 86 f7 0d 01 09 01|"; distance:0; content:"|55 04 0a|"; distance:0; content:"|55 04 0b|"; distance:0; content:"|55 04 03|"; distance:0; pcre:"/^.(.[a-z]{4,12}\.(?:us|org|net|biz|info|mobi|com)[01]).*?\x55\x04\x03.\1/Rs"; reference:url,sslbl.abuse.ch; classtype:trojan-activity; sid:2022868; rev:4;)

Added 2016-06-08 17:58:40 UTC


alert tls $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET TROJAN ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Quakbot CnC?)"; flow:established,from_server; content:"|55 04 06|"; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 08|"; distance:0; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 07|"; distance:0; pcre:"/^.{2}[A-Z][a-z]+(?:\x20[A-Z][a-z]+)?[01]/Rs"; content:"|55 04 09|"; fast_pattern; distance:0; pcre:"/^.{2}\d{2,3}(?:\x20[A-Z][a-z]+\.?){1,3}[01]/Rs"; content:"|55 04 0a|"; distance:0; content:"|55 04 0b|"; distance:0; content:"|55 04 03|"; distance:0; pcre:"/^.{2}[a-z]{4,12}\.(?:us|org|net|biz|info|mobi)[01]/Rs"; content:!"|2a 86 48 86 f7 0d 01 09 01|"; content:!"|00 f6 f9 01 7a f6 3a 5f c1 5e 21 18 4a fd f8 da 6f|"; reference:url,sslbl.abuse.ch; classtype:trojan-activity; sid:2022868; rev:3;)

Added 2016-06-07 17:56:40 UTC


alert tls $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET TROJAN ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Quakbot CnC?)"; flow:established,from_server; content:"|55 04 06|"; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 08|"; distance:0; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 07|"; distance:0; pcre:"/^.{2}[A-Z][a-z]+(?:\x20[A-Z][a-z]+)?[01]/Rs"; content:"|55 04 09|"; fast_pattern; distance:0; pcre:"/^.{2}\d{2,3}(?:\x20[A-Z][a-z]+\.?){1,3}[01]/Rs"; content:"|55 04 0a|"; distance:0; content:"|55 04 0b|"; distance:0; content:"|55 04 03|"; distance:0; pcre:"/^.{2}[a-z]{4,12}\.(?:us|org|net|biz|info|mobi)[01]/Rs"; content:!"|2a 86 48 86 f7 0d 01 09 01|"; content:!"|00 f6 f9 01 7a f6 3a 5f c1 5e 21 18 4a fd f8 da 6f|"; reference:url,sslbl.abuse.ch; classtype:trojan-activity; sid:2022868; rev:3;)

Added 2016-06-07 17:55:11 UTC


alert tls $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET TROJAN ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Quakbot CnC?)"; flow:established,from_server; content:"|55 04 06|"; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 08|"; distance:0; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 07|"; distance:0; pcre:"/^.{2}[A-Z][a-z]+(?:\x20[A-Z][a-z]+)?[01]/Rs"; content:"|55 04 09|"; fast_pattern; distance:0; pcre:"/^.{2}\d{2,3}(?:\x20[A-Z][a-z]+\.?){1,3}[01]/Rs"; content:"|55 04 0a|"; distance:0; content:"|55 04 0b|"; distance:0; content:"|55 04 03|"; distance:0; pcre:"/^.{2}[a-z]{4,12}\.(?:us|org|net|biz|info|mobi)[01]/Rs"; content:!"|2a 86 48 86 f7 0d 01 09 01|"; reference:url,sslbl.abuse.ch; classtype:trojan-activity; sid:2022868; rev:2;)

Added 2016-06-06 17:32:38 UTC


alert tls $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET TROJAN ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Quakbot CnC?)"; flow:established,from_server; content:"|55 04 06|"; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 08|"; distance:0; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 07|"; distance:0; pcre:"/^.{2}[A-Z][a-z]+(?:\x20[A-Z][a-z]+)?[01]/Rs"; content:"|55 04 09|"; fast_pattern; distance:0; pcre:"/^.{2}\d{2,3}(?:\x20[A-Z][a-z]+\.?){1,3}[01]/Rs"; content:"|55 04 0a|"; distance:0; content:"|55 04 0b|"; distance:0; content:"|55 04 03|"; distance:0; pcre:"/^.{2}[a-z]{4,12}\.(?:us|org|net|biz|info|mobi)[01]/Rs"; content:!"|2a 86 48 86 f7 0d 01 09 01|"; reference:url,sslbl.abuse.ch; classtype:trojan-activity; sid:2022868; rev:2;)

Added 2016-06-06 17:24:17 UTC


alert tls $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET TROJAN ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Quakbot CnC?)"; flow:established,from_server; content:"|55 04 06|"; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 08|"; distance:0; pcre:"/^.\x02[A-Z]{2}/Rs"; content:"|55 04 07|"; distance:0; pcre:"/^.{2}[A-Z][a-z]+(?:\x20[A-Z][a-z]+)?[01]/Rs"; content:"|55 04 09|"; fast_pattern; distance:0; pcre:"/^.{2}\d{2,3}(?:\x20[A-Z][a-z]+\.?){1,3}[01]/Rs"; content:"|55 04 0a|"; distance:0; content:"|55 04 0b|"; distance:0; content:"|55 04 03|"; distance:0; pcre:"/^.{2}[a-z]{4,12}\.(?:us|org|net|biz|info|mobi)[01]/Rs"; content:!"|2a 86 48 86 f7 0d 01 09 01|"; reference:url,sslbl.abuse.ch; classtype:trojan-activity; sid:2022868; rev:2;)

Added 2016-06-06 17:05:27 UTC


Topic revision: r1 - 2019-07-09 - TWikiGuest
 
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