""ET TROJAN Win32/BlackCarat XORed (0x77) CnC Checkin""

SID: 2026525

Revision: 6

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_18, deployment Perimeter, malware_family BlackCarat, performance_impact Low, signature_severity Major, tag RAT, updated_at 2019_01_30

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: !80

Destination Network: $EXTERNAL_NET

Destination Port: [!25,!445,!1500]

Flow: established,to_server

Contents:

  • Value: "|77 77|" Depth: 2 Offset: 2

  • Value: "|77|"

  • Value: "|77 77 77 77 77 77 77 77 77 77 77 77 77|"

  • Value: "|20 77 1e 77 19 77 13 77 18 77 00 77 04|"

  • Value: !"|00 00 00 00 00 00|"

Within: 13

PCRE:

Special Options:

  • fast_pattern

source