Analysis

  • max time kernel
    145s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2024, 11:16

General

  • Target

    gunzipped.exe

  • Size

    594KB

  • MD5

    1dc228ba3845e137debb24d881737242

  • SHA1

    00af545608674da686d9d84adf056d1c26d8e0fb

  • SHA256

    4ba298859e61cb9c39d9d4a4d556fe6357ce0901d5d4ac6f78e6e15ced75cccb

  • SHA512

    549bde4f2dd1a5da10d6b4d7c617cf2c70c7123d7139fb9e5aa8373adb044d766ff0003566b094dab27ccfa2c6a13eb52ff2af283a3e641e2c28ee844953679f

  • SSDEEP

    12288:nEBU3YlS/ZYajCjq4HGpMqnm04T9op5Us+9wF9DvmwndDq:EBJQZYaGjVGpRm04Tmpt4wnDx

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

103.167.90.225:4251

tom7.work.gd:4251

Mutex

948c774c-c1d8-4f57-8709-ed674b265adb

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    tom7.work.gd

  • backup_dns_server

  • buffer_size

    65535

  • build_time

    2023-11-01T19:46:43.902018636Z

  • 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

    4251

  • 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

    948c774c-c1d8-4f57-8709-ed674b265adb

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    103.167.90.225

  • primary_dns_server

    tom7.work.gd

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    10

  • 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 whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • 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 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
    "C:\Users\Admin\AppData\Local\Temp\gunzipped.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2240
    • C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
      "C:\Users\Admin\AppData\Local\Temp\gunzipped.exe"
      2⤵
        PID:3088
      • C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
        "C:\Users\Admin\AppData\Local\Temp\gunzipped.exe"
        2⤵
        • Checks whether UAC is enabled
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1616
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks.exe" /create /f /tn "SMTP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp80B9.tmp"
          3⤵
          • Creates scheduled task(s)
          PID:932

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      1KB

      MD5

      8ec831f3e3a3f77e4a7b9cd32b48384c

      SHA1

      d83f09fd87c5bd86e045873c231c14836e76a05c

      SHA256

      7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

      SHA512

      26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

    • C:\Users\Admin\AppData\Local\Temp\tmp80B9.tmp

      Filesize

      1KB

      MD5

      42f7159e831591530fb8cdd62d4650a6

      SHA1

      5d951d429a25957ca5fc3be282774f148e2f4f81

      SHA256

      aac9dd0d2fd0398d7958c31af596794180e27ba287868cb762878fb470da3cc8

      SHA512

      8439116c6be44e4d1575ea62a7062951605d47af636eb9c292a7e671ebbeee23d14dbb0dae769e87a3ce11877bf41572f7e21a75a0015dbf9d3dfa8b8cc68bbc

    • memory/1616-30-0x0000000006D90000-0x0000000006D9C000-memory.dmp

      Filesize

      48KB

    • memory/1616-22-0x00000000065F0000-0x000000000660E000-memory.dmp

      Filesize

      120KB

    • memory/1616-41-0x0000000005750000-0x0000000005760000-memory.dmp

      Filesize

      64KB

    • memory/1616-40-0x0000000074760000-0x0000000074F10000-memory.dmp

      Filesize

      7.7MB

    • memory/1616-38-0x0000000007030000-0x0000000007096000-memory.dmp

      Filesize

      408KB

    • memory/1616-37-0x0000000006E40000-0x0000000006E54000-memory.dmp

      Filesize

      80KB

    • memory/1616-36-0x0000000006E10000-0x0000000006E3E000-memory.dmp

      Filesize

      184KB

    • memory/1616-35-0x0000000006E00000-0x0000000006E0E000-memory.dmp

      Filesize

      56KB

    • memory/1616-34-0x0000000006DE0000-0x0000000006DF4000-memory.dmp

      Filesize

      80KB

    • memory/1616-11-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/1616-33-0x0000000006DC0000-0x0000000006DD0000-memory.dmp

      Filesize

      64KB

    • memory/1616-15-0x0000000074760000-0x0000000074F10000-memory.dmp

      Filesize

      7.7MB

    • memory/1616-32-0x0000000006DB0000-0x0000000006DC4000-memory.dmp

      Filesize

      80KB

    • memory/1616-16-0x0000000005750000-0x0000000005760000-memory.dmp

      Filesize

      64KB

    • memory/1616-31-0x0000000006DA0000-0x0000000006DAE000-memory.dmp

      Filesize

      56KB

    • memory/1616-21-0x0000000005580000-0x000000000558A000-memory.dmp

      Filesize

      40KB

    • memory/1616-29-0x0000000006D80000-0x0000000006D92000-memory.dmp

      Filesize

      72KB

    • memory/1616-26-0x0000000006D30000-0x0000000006D42000-memory.dmp

      Filesize

      72KB

    • memory/1616-23-0x0000000006710000-0x000000000671A000-memory.dmp

      Filesize

      40KB

    • memory/1616-27-0x0000000006D40000-0x0000000006D5A000-memory.dmp

      Filesize

      104KB

    • memory/1616-28-0x0000000006D70000-0x0000000006D7E000-memory.dmp

      Filesize

      56KB

    • memory/2240-3-0x0000000005320000-0x00000000053B2000-memory.dmp

      Filesize

      584KB

    • memory/2240-0-0x0000000000870000-0x000000000090A000-memory.dmp

      Filesize

      616KB

    • memory/2240-1-0x0000000074760000-0x0000000074F10000-memory.dmp

      Filesize

      7.7MB

    • memory/2240-14-0x0000000074760000-0x0000000074F10000-memory.dmp

      Filesize

      7.7MB

    • memory/2240-2-0x00000000059B0000-0x0000000005F54000-memory.dmp

      Filesize

      5.6MB

    • memory/2240-10-0x0000000008FF0000-0x000000000908C000-memory.dmp

      Filesize

      624KB

    • memory/2240-9-0x00000000069C0000-0x0000000006A34000-memory.dmp

      Filesize

      464KB

    • memory/2240-8-0x0000000006700000-0x000000000670C000-memory.dmp

      Filesize

      48KB

    • memory/2240-7-0x00000000065D0000-0x00000000065D8000-memory.dmp

      Filesize

      32KB

    • memory/2240-6-0x0000000005670000-0x0000000005688000-memory.dmp

      Filesize

      96KB

    • memory/2240-5-0x0000000005310000-0x000000000531A000-memory.dmp

      Filesize

      40KB

    • memory/2240-4-0x00000000052C0000-0x00000000052D0000-memory.dmp

      Filesize

      64KB