Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/01/2024, 12:27

General

  • Target

    7a40d67c8a78ef63bda595ab16f5ac0f.exe

  • Size

    1.5MB

  • MD5

    7a40d67c8a78ef63bda595ab16f5ac0f

  • SHA1

    3a4636fdee0797e1dfa0c5075cb0466c9ea00f84

  • SHA256

    e2baf0f5b01a92323fa0f46207e5b9ae09ec8945ef722b912d3559d43c6e907c

  • SHA512

    c448e227eb2244a62e7457823ad471da15a42ceb49e47f9cf148dceaafea95f7d2edca544dc900c4bf53411c94e4a59d393e861767a2fe569a04de707c2fe6bb

  • SSDEEP

    12288:KsJG6kBgpx60IbcNk+uVD7TgUdnfQu5X7Q6H+Uy1Susr8MmH3j2:M6k2n64EPVY1ZZS5R0

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

fablousy.kozow.com:4050

127.0.0.1:4050

Mutex

58d1d627-4bc2-40ea-9ed5-7063fbcc1866

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-05-17T05:23:14.334950536Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    4050

  • default_group

    ike

  • 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

    58d1d627-4bc2-40ea-9ed5-7063fbcc1866

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    fablousy.kozow.com

  • primary_dns_server

    8.8.8.8

  • 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.

  • 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).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe
    "C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4944
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uTptUfOsJI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3BDB.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2020
    • C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe
      "C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe"
      2⤵
        PID:4668
      • C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe
        "C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe"
        2⤵
          PID:3380
        • C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe
          "C:\Users\Admin\AppData\Local\Temp\7a40d67c8a78ef63bda595ab16f5ac0f.exe"
          2⤵
          • Checks whether UAC is enabled
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          PID:3988

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\7a40d67c8a78ef63bda595ab16f5ac0f.exe.log

        Filesize

        1KB

        MD5

        8ec831f3e3a3f77e4a7b9cd32b48384c

        SHA1

        d83f09fd87c5bd86e045873c231c14836e76a05c

        SHA256

        7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

        SHA512

        26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

      • C:\Users\Admin\AppData\Local\Temp\tmp3BDB.tmp

        Filesize

        1KB

        MD5

        a8312b3e81ba60ee5a4987159b88c157

        SHA1

        4bcefaa659645a2b92c7d5c23a81b9120090fc9c

        SHA256

        eb59fd50309022602a46f5c798a49ae6fbc88935e639bc91b6f5bb479ab4be2f

        SHA512

        74b5c4d8dc1bdeb33e9323794f92b366204efbdd9f9110cdffa022f4600a3e7cfa87102fda87cd836c3c09b4b7272d0ae9ea0d63cb58842970b597def6a4f547

      • memory/3988-28-0x00000000052E0000-0x00000000052F0000-memory.dmp

        Filesize

        64KB

      • memory/3988-27-0x0000000074F60000-0x0000000075710000-memory.dmp

        Filesize

        7.7MB

      • memory/3988-26-0x0000000005EC0000-0x0000000005ECA000-memory.dmp

        Filesize

        40KB

      • memory/3988-25-0x0000000005DA0000-0x0000000005DBE000-memory.dmp

        Filesize

        120KB

      • memory/3988-24-0x00000000052C0000-0x00000000052CA000-memory.dmp

        Filesize

        40KB

      • memory/3988-22-0x00000000052E0000-0x00000000052F0000-memory.dmp

        Filesize

        64KB

      • memory/3988-21-0x0000000074F60000-0x0000000075710000-memory.dmp

        Filesize

        7.7MB

      • memory/3988-17-0x0000000000400000-0x0000000000438000-memory.dmp

        Filesize

        224KB

      • memory/4944-10-0x0000000006EB0000-0x0000000006F5A000-memory.dmp

        Filesize

        680KB

      • memory/4944-11-0x0000000006B60000-0x0000000006B9A000-memory.dmp

        Filesize

        232KB

      • memory/4944-1-0x0000000074F60000-0x0000000075710000-memory.dmp

        Filesize

        7.7MB

      • memory/4944-9-0x0000000005760000-0x0000000005770000-memory.dmp

        Filesize

        64KB

      • memory/4944-8-0x0000000074F60000-0x0000000075710000-memory.dmp

        Filesize

        7.7MB

      • memory/4944-20-0x0000000074F60000-0x0000000075710000-memory.dmp

        Filesize

        7.7MB

      • memory/4944-7-0x0000000006B00000-0x0000000006B1E000-memory.dmp

        Filesize

        120KB

      • memory/4944-6-0x0000000006BA0000-0x0000000006C3C000-memory.dmp

        Filesize

        624KB

      • memory/4944-5-0x0000000005560000-0x000000000556A000-memory.dmp

        Filesize

        40KB

      • memory/4944-4-0x0000000005760000-0x0000000005770000-memory.dmp

        Filesize

        64KB

      • memory/4944-3-0x00000000055B0000-0x0000000005642000-memory.dmp

        Filesize

        584KB

      • memory/4944-2-0x0000000005AC0000-0x0000000006064000-memory.dmp

        Filesize

        5.6MB

      • memory/4944-0-0x00000000009D0000-0x0000000000B60000-memory.dmp

        Filesize

        1.6MB