""ET TROJAN njRAT v65.0 CnC Checkin""

SID: 2036933

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_06_08, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2022_06_08

Reference:

  • md5

  • 008e86fdb755fb073cf629e2a6b8c783

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: any

Flow: established,to_server

Contents:

  • Value: "|00 00 00|"

Offset: 1

  • Value: "|00 00 00|"

  • Value: "|7c 7c|"

  • Value: "|7c 7c|Microsoft Windows"

  • Value: "|7c 7c ce de 7c 7c ce de 7c 7c ce de 7c 7c 31 7c 7c|65.0"

Within:

PCRE: "/^(?:\d{1,3}.){3}\d{1,3}||/R"

Special Options:

  • fast_pattern

source