Analysis

  • max time kernel
    119s
  • max time network
    102s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-08-2024 03:23

General

  • Target

    bb936870fe8af1aefa1eec876801cae0N.exe

  • Size

    281KB

  • MD5

    bb936870fe8af1aefa1eec876801cae0

  • SHA1

    7cb2ae9a76cadb344075b19087ed27c9ef983b73

  • SHA256

    c3a0cddf3cb0389fdd9c8029f3dc4638f511b93950c56fb811310987b51ee901

  • SHA512

    ff863e20775f66dfacc4e2e59b924bdf5482c89a763c9f6674ed502ff9214e9aebc53e43d3ce1237cbe5fe01874b9e7b8c51552b67cbacae87c755d929da8974

  • SSDEEP

    6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fKkfe:boSeGUA5YZazpXUmZhZ6S7

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

Signatures

  • NanoCore

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bb936870fe8af1aefa1eec876801cae0N.exe
    "C:\Users\Admin\AppData\Local\Temp\bb936870fe8af1aefa1eec876801cae0N.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3436
    • C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe
      "C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4012
      • C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe
        "C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"
        3⤵
        • Executes dropped EXE
        • Checks whether UAC is enabled
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        PID:4292

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe

    Filesize

    282KB

    MD5

    87df6a89c07b0493486309a000dbbc34

    SHA1

    97d1414c53c4737ae6ad2e8765337fbc4665f529

    SHA256

    4d7dec1e7f62e338e0b820e8e7c73b94029627663628430e22c7f355b30641a0

    SHA512

    fac28cf07ea5f1827ed55a9ffff21f5af8885020653273b6c347a27583e7a6ee58e7317f0ccf605983651ce893f7e052a66a16d2bef66b38469b7bb19a9efaa3

  • memory/3436-1-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/3436-2-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/3436-17-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/3436-0-0x0000000074B42000-0x0000000074B43000-memory.dmp

    Filesize

    4KB

  • memory/4012-30-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/4012-16-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/4012-18-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/4012-19-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/4012-32-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/4292-22-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/4292-25-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/4292-26-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/4292-27-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/4292-29-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/4292-20-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/4292-21-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/4292-33-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB

  • memory/4292-34-0x0000000074B40000-0x00000000750F1000-memory.dmp

    Filesize

    5.7MB