""ET TROJAN Observed Buer Loader Domain (officewestunionbank .com in TLS SNI)""

SID: 2031610

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_02_10, deployment Perimeter, malware_family Buer, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2021_02_10

Reference:

  • md5

  • 61e213e717cc8e156cec79a7c1cd0c64

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 443

Flow: established,to_server

Contents:

  • Value: "|16|"

  • Value: "|01|"

  • Value: "|00 00 17|officewestunionbank.com"

Within: 8

PCRE:

Special Options:

  • fast_pattern

source