General

  • Target

    fe336762e80da2b170280a2b1b836d90N.exe

  • Size

    640KB

  • Sample

    240823-j56reawbnm

  • MD5

    fe336762e80da2b170280a2b1b836d90

  • SHA1

    55a234638622e0e67d380cc7f827e71a88ffcba8

  • SHA256

    73faac219e34398e37026d1bebc1bb198a833ce5a97de2b56dd2a723d27456f6

  • SHA512

    052966fccf969a883f8a12a0681d089d3c137dc444ff4df8d3b4dca1f8fce1196fb7ff411f0577ae1faea9b07284e9edd49226124c9cb22e4701829e7337d44b

  • SSDEEP

    12288:b7WYyKnpG9iNdeK0xrhslCO3hF/+iX11Cj0hxIB6XTyG:b7WY1mrmh3Dn0ghxMcTyG

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

mattwems38.ddns.net:57268

94.156.65.159:57268

Mutex

5c44c87f-5c9e-45b6-af06-33037a7e5217

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    94.156.65.159

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2024-05-06T13:32:33.415272936Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    false

  • clear_zone_identifier

    true

  • connect_delay

    4000

  • connection_port

    57268

  • default_group

    Cbembalyne

  • enable_debug_mode

    true

  • gc_threshold

    1.048576e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2500

  • max_packet_size

    1.048576e+07

  • mutex

    5c44c87f-5c9e-45b6-af06-33037a7e5217

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    mattwems38.ddns.net

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5009

  • run_delay

    0

  • run_on_startup

    false

  • set_critical_process

    false

  • timeout_interval

    5008

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Targets

    • Target

      fe336762e80da2b170280a2b1b836d90N.exe

    • Size

      640KB

    • MD5

      fe336762e80da2b170280a2b1b836d90

    • SHA1

      55a234638622e0e67d380cc7f827e71a88ffcba8

    • SHA256

      73faac219e34398e37026d1bebc1bb198a833ce5a97de2b56dd2a723d27456f6

    • SHA512

      052966fccf969a883f8a12a0681d089d3c137dc444ff4df8d3b4dca1f8fce1196fb7ff411f0577ae1faea9b07284e9edd49226124c9cb22e4701829e7337d44b

    • SSDEEP

      12288:b7WYyKnpG9iNdeK0xrhslCO3hF/+iX11Cj0hxIB6XTyG:b7WY1mrmh3Dn0ghxMcTyG

    • NanoCore

      NanoCore is a remote access tool (RAT) with a variety of capabilities.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks