""ET TROJAN Possible UNC1878/FIN12 Cobalt Strike CnC SSL Cert Inbound (Texsa)""

SID: 2031135

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 2020_10_29, deployment Perimeter, malware_family Cobalt_Strike, performance_impact Low, signature_severity Major, tag SSL_Suspicious_Cert, updated_at 2020_10_29

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: 443

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "|16|"

  • Value: "|0b|"

  • Value: "|06 03 55 04 06|"

  • Value: "|02|US"

  • Value: "|06 03 55 04 08|"

  • Value: "|02|"

  • Value: "|06 03 55 04 07|"

  • Value: "|05|Texsa"

  • Value: "|06 03 55 04 06|"

  • Value: "|02|US"

  • Value: "|06 03 55 04 08|"

  • Value: "|02|"

  • Value: "|06 03 55 04 07|"

  • Value: "|05|Texsa"

Within: 6

PCRE:

Special Options:

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