General

  • Target

    8a2ba6c8f4dfb7891261e7a81616c11f70a8ee26df40bfb52b66a6e762b90641N.exe

  • Size

    279KB

  • Sample

    250104-ms4caswkcz

  • MD5

    b1f2bab80b17fce89112c82286245040

  • SHA1

    3ab5ddf5a4632f41134700c7b6eb3944ebbb20d9

  • SHA256

    8a2ba6c8f4dfb7891261e7a81616c11f70a8ee26df40bfb52b66a6e762b90641

  • SHA512

    b8bb023d0ca28fa0c543d828534cceae262447b0ce157f95dc9fa93bfd7623eeb7b19391c875a6821e3dcd6a495029fe71631a9977bd5f9878f23510f4ebfcc6

  • SSDEEP

    6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fc:boSeGUA5YZazpXUmZhZ6k

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

sysupdate24.ddns.net:45400

Mutex

ae82ab7f-db07-49ee-9d2b-76075d76f37f

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

  • buffer_size

    65535

  • build_time

    2020-04-24T17:41:53.492468936Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    45400

  • default_group

    Default

  • 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

    ae82ab7f-db07-49ee-9d2b-76075d76f37f

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    sysupdate24.ddns.net

  • primary_dns_server

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    true

  • set_critical_process

    true

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Targets

    • Target

      8a2ba6c8f4dfb7891261e7a81616c11f70a8ee26df40bfb52b66a6e762b90641N.exe

    • Size

      279KB

    • MD5

      b1f2bab80b17fce89112c82286245040

    • SHA1

      3ab5ddf5a4632f41134700c7b6eb3944ebbb20d9

    • SHA256

      8a2ba6c8f4dfb7891261e7a81616c11f70a8ee26df40bfb52b66a6e762b90641

    • SHA512

      b8bb023d0ca28fa0c543d828534cceae262447b0ce157f95dc9fa93bfd7623eeb7b19391c875a6821e3dcd6a495029fe71631a9977bd5f9878f23510f4ebfcc6

    • SSDEEP

      6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fc:boSeGUA5YZazpXUmZhZ6k

    • NanoCore

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

    • Nanocore family

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks