""ET TROJAN GratefulPOS Covert DNS CnC Initial Checkin""

SID: 2025144

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 2017_12_11, deployment Perimeter, malware_family Grateful_POS, performance_impact Moderate, signature_severity Major, updated_at 2017_12_11

Reference:

Protocol: udp

Source Network: $HOME_NET

Source Port: any

Destination Network: any

Destination Port: 53

Flow:

Contents:

  • Value: "|01|" Depth: 1 Offset: 2

  • Value: "|00 01 00 00 00 00 00|"

  • Value: "|08|"

  • Value: "|04|ping|03|adm"

Within: 3

PCRE: "/^[a-f0-9]{8}[\x03-\x06]grp/R"

Special Options:

  • fast_pattern

source