""ET TROJAN Possible XServer Backdoor Certificate Observed""

SID: 2029190

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_12_23, deployment Perimeter, signature_severity Major, updated_at 2019_12_23

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: any

Destination Network: $HOME_NET

Destination Port: 1024:

Flow: established,to_server

Contents:

  • Value: "|16|" Depth: 1

  • Value: "|55 04 06|"

  • Value: "|02|US|31|"

  • Value: "|55 04 08|"

  • Value: "|02|BA|31|"

  • Value: "|55 04 0a|"

  • Value: "|04|Root|31|"

  • Value: "|55 04 0b|"

  • Value: "|04|Root|31|"

  • Value: "|55 04 03|"

  • Value: "|04|Root|30|"

Within: 6

PCRE:

Special Options:

  • fast_pattern

source