General

  • Target

    fca06d8a111b6799913d2487f47cbf45cb5f4f89d78165d8621986c563ea0fad

  • Size

    282KB

  • Sample

    240926-srmwtaxcnb

  • MD5

    52d0c236a13464ea6f28e0bf9989a159

  • SHA1

    8c3d0ce7e30c8f85521e2ede54150ff06e3e84ae

  • SHA256

    fca06d8a111b6799913d2487f47cbf45cb5f4f89d78165d8621986c563ea0fad

  • SHA512

    3a395f6e738b1fa7348db8e4d375adf242454602f59250fda3f19440647561283f97ece1d9b6cb38398f9b184e7700cb8ef19d7ea39ac2f75f4ad474a132cbc5

  • SSDEEP

    6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fKkf1Q:boSeGUA5YZazpXUmZhZ6S3

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

      fca06d8a111b6799913d2487f47cbf45cb5f4f89d78165d8621986c563ea0fad

    • Size

      282KB

    • MD5

      52d0c236a13464ea6f28e0bf9989a159

    • SHA1

      8c3d0ce7e30c8f85521e2ede54150ff06e3e84ae

    • SHA256

      fca06d8a111b6799913d2487f47cbf45cb5f4f89d78165d8621986c563ea0fad

    • SHA512

      3a395f6e738b1fa7348db8e4d375adf242454602f59250fda3f19440647561283f97ece1d9b6cb38398f9b184e7700cb8ef19d7ea39ac2f75f4ad474a132cbc5

    • SSDEEP

      6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fKkf1Q:boSeGUA5YZazpXUmZhZ6S3

    • NanoCore

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

    • 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