Analysis

  • max time kernel
    119s
  • max time network
    96s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-08-2024 04:03

General

  • Target

    5f3d5f8eae7c4bafe2f1e0ca83edf2e0N.exe

  • Size

    281KB

  • MD5

    5f3d5f8eae7c4bafe2f1e0ca83edf2e0

  • SHA1

    c4bee44faaa77967652f34304091e9ea2418320b

  • SHA256

    ceac954cc8a5912ee568c933fdf0c862abfa80a0638a6f1541ac3c4b691f8e92

  • SHA512

    d485c791d0f6342acc8222581230877131183a6a069f2a66081f433fdcab7ca1906d7c52a8f7f1957f09a4b6eadf3efe18474cbe46b1e7b5ddf7ea99ee4ea301

  • SSDEEP

    6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fKkfm: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\5f3d5f8eae7c4bafe2f1e0ca83edf2e0N.exe
    "C:\Users\Admin\AppData\Local\Temp\5f3d5f8eae7c4bafe2f1e0ca83edf2e0N.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2952
    • 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:716
      • 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:3600

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    281KB

    MD5

    6aed1cd6a9b200867eb07e224370ca2b

    SHA1

    d630b236e3ad79e3ba2824d2cec73a780bcb0e93

    SHA256

    8bf34445c733c8dcfc65b38a13dc72daee33dd4675a5f2efe4dad78c5b0f48e2

    SHA512

    3a9ece8549c52a013341d1cc61d21a0410cc2012abf88e72cf4991de8eef3a77bcaaa79cf59265b0edce86a8031d71ef290e56717e884364eb0f28ea9daa2625

  • memory/716-32-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/716-19-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/716-17-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/716-20-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/716-21-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/716-34-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/2952-1-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/2952-2-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/2952-3-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/2952-18-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/2952-0-0x00000000754E2000-0x00000000754E3000-memory.dmp

    Filesize

    4KB

  • memory/3600-23-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/3600-27-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/3600-29-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/3600-28-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/3600-31-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/3600-22-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/3600-24-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/3600-35-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB

  • memory/3600-36-0x00000000754E0000-0x0000000075A91000-memory.dmp

    Filesize

    5.7MB