Analysis

  • max time kernel
    48s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    21-07-2021 15:05

General

  • Target

    Contact00212399490.exe

  • Size

    1.2MB

  • MD5

    a6bd3de048002bee7a8d973c887227d8

  • SHA1

    90cf93d93b141654a62ff3a3b6810faef2ff3d69

  • SHA256

    1e3539b9de51134004ff4bff43ab144e748a329265decf8421442cef3109210d

  • SHA512

    6b84954f6dbe9c7d5a7580c2d917414a7875494508a3d17b4f092d270fecbe695e10f6eb27de52aac807d06a432e3902dc9a9671c7bc2b170b46afba1b6f30c6

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

hncbeyghfsbvcuabgsbncvzgaioiuyegdbhabbbw.ydns.eu:2017

Mutex

238a496b-ffb2-448a-bc1f-f27aa51697ac

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    hncbeyghfsbvcuabgsbncvzgaioiuyegdbhabbbw.ydns.eu

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-05-01T15:35:35.227430336Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    2017

  • 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

    238a496b-ffb2-448a-bc1f-f27aa51697ac

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • 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.

  • 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
  • Drops file in Program Files directory 2 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Contact00212399490.exe
    "C:\Users\Admin\AppData\Local\Temp\Contact00212399490.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2020
    • C:\Users\Admin\AppData\Local\Temp\Contact00212399490.exe
      "{path}"
      2⤵
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2004
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "LAN Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB8B5.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:268
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "LAN Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB9FD.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:864

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpB8B5.tmp

    MD5

    ebeb8ed1ee83347982221fe1fdedb735

    SHA1

    a67c62bb6efb43ce93f41952448c92920b5d91dd

    SHA256

    e71437814b04100346bedec461de661c9b3f4219e827c5d350f07f325c5e37ee

    SHA512

    9baf4c6a893d8e182f1c90049b6459c5db94d7d1aaa0023b2a14e8d74dacfc642cc11a988384f4cf028d828c47a5c71a8b2e3dcddd0e9196f7a31cf05e7df9f1

  • C:\Users\Admin\AppData\Local\Temp\tmpB9FD.tmp

    MD5

    54865f98871478b2b88b7f8aa6100915

    SHA1

    6f8667f1ce25cebee2a7b460668736ff6bcfac54

    SHA256

    287f7b4372926ff59bb9a14bdfc00ad63f92af8efdb2e14f6f6baf31878fd44e

    SHA512

    caba0bd0cb0eda0710291f9754cfdef1a3d8fdb8b6d07f5d3e4d1e7b09c87f37032287ddef0a75485d6e685afa3510ee64453662e6c8d223ae171b392b58e493

  • memory/268-66-0x0000000000000000-mapping.dmp

  • memory/864-68-0x0000000000000000-mapping.dmp

  • memory/2004-64-0x000000000041E792-mapping.dmp

  • memory/2004-63-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2004-70-0x0000000000700000-0x0000000000701000-memory.dmp

    Filesize

    4KB

  • memory/2020-60-0x0000000076281000-0x0000000076283000-memory.dmp

    Filesize

    8KB

  • memory/2020-61-0x00000000004F0000-0x00000000004F1000-memory.dmp

    Filesize

    4KB

  • memory/2020-62-0x00000000004F1000-0x00000000004F2000-memory.dmp

    Filesize

    4KB