Analysis

  • max time kernel
    140s
  • max time network
    164s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/05/2024, 08:25

General

  • Target
    ee66629e98c3278017e7297d3b2b57aac9783a51a46b34046ccc866d10ba4f3c.exe
  • Size 945KB
  • Sample240511-kbrk3abe24
  • SHA256 ee66629e98c3278017e7297d3b2b57aac9783a51a46b34046ccc866d10ba4f3c
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • december2nd.ddns.net:65024

  • december2n.duckdns.org:65024

Mutex
  • 2c009a56-c28c-48f4-8875-acf9e1222e9f

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    december2n.duckdns.org

  • backup_dns_server

  • buffer_size

    65535

  • build_time

    2024-02-17T09:12:36.211032636Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    65024

  • default_group

    NO GREE

  • 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

    2c009a56-c28c-48f4-8875-acf9e1222e9f

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    december2nd.ddns.net

  • primary_dns_server

  • 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.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ee66629e98c3278017e7297d3b2b57aac9783a51a46b34046ccc866d10ba4f3c.exe
    "C:\Users\Admin\AppData\Local\Temp\ee66629e98c3278017e7297d3b2b57aac9783a51a46b34046ccc866d10ba4f3c.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4964
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\ee66629e98c3278017e7297d3b2b57aac9783a51a46b34046ccc866d10ba4f3c.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2192
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\fupTmRCVq.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:112
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fupTmRCVq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4E55.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3984
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
      2⤵
      • Adds Run key to start application
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4544
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "SMTP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp76AD.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:3304
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "SMTP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp774A.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:3404
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3920 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4504

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          __PSScriptPolicyTest_3bi55yw2.ecy.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3bi55yw2.ecy.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          tmp4E55.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\tmp4E55.tmp
          • Size 1KB
          • SHA256 f915fec06afb59de8434e8e87f1a4603a56e2a30dca7e1c00db439114f80ff28
          • MD5 SHA1 SHA512

          tmp76AD.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\tmp76AD.tmp
          • Size 1KB
          • SHA256 3086d914f6b23268f8a12cb1a05516cd5465c2577e1d1e449f1b45c8e5e8f83c
          • MD5 SHA1 SHA512

          tmp774A.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\tmp774A.tmp
          • Size 1KB
          • SHA256 3d568a47a8944a47f4aed6982755ac7ff7dda469cc1c81c213ecaa5d89de1f83
          • MD5 SHA1 SHA512

          memory/2192-54-0x0000000070B30000-0x0000000070B7C000-memory.dmp

          memory/2192-65-0x00000000079A0000-0x0000000007A43000-memory.dmp

          memory/2192-78-0x0000000074ED0000-0x0000000075680000-memory.dmp

          memory/2192-75-0x0000000007EE0000-0x0000000007EE8000-memory.dmp

          memory/2192-74-0x0000000008020000-0x000000000803A000-memory.dmp

          memory/2192-73-0x0000000007EA0000-0x0000000007EB4000-memory.dmp

          memory/2192-72-0x0000000007E90000-0x0000000007E9E000-memory.dmp

          memory/2192-71-0x0000000007E60000-0x0000000007E71000-memory.dmp

          memory/2192-70-0x0000000007F00000-0x0000000007F96000-memory.dmp

          memory/2192-15-0x0000000074ED0000-0x0000000075680000-memory.dmp

          memory/2192-16-0x0000000002FB0000-0x0000000002FE6000-memory.dmp

          memory/2192-17-0x0000000074ED0000-0x0000000075680000-memory.dmp

          memory/2192-19-0x0000000074ED0000-0x0000000075680000-memory.dmp

          memory/2192-21-0x0000000005CE0000-0x0000000006308000-memory.dmp

          memory/2192-68-0x0000000007C70000-0x0000000007C8A000-memory.dmp

          memory/2192-67-0x00000000082D0000-0x000000000894A000-memory.dmp

          memory/2192-25-0x00000000058F0000-0x0000000005912000-memory.dmp

          memory/2192-26-0x0000000005990000-0x00000000059F6000-memory.dmp

          memory/2192-66-0x0000000074ED0000-0x0000000075680000-memory.dmp

          memory/2192-27-0x0000000005A00000-0x0000000005A66000-memory.dmp

          memory/2192-44-0x0000000006490000-0x00000000067E4000-memory.dmp

          memory/2192-64-0x0000000006EF0000-0x0000000006F0E000-memory.dmp

          memory/2192-53-0x0000000006F10000-0x0000000006F42000-memory.dmp

          memory/2192-52-0x0000000074ED0000-0x0000000075680000-memory.dmp

          memory/2192-69-0x0000000007CD0000-0x0000000007CDA000-memory.dmp

          memory/2192-51-0x0000000006A70000-0x0000000006ABC000-memory.dmp

          memory/2192-50-0x0000000006920000-0x000000000693E000-memory.dmp

          memory/4544-49-0x00000000061F0000-0x00000000061FA000-memory.dmp

          memory/4544-47-0x0000000005610000-0x000000000561C000-memory.dmp

          memory/4544-48-0x00000000061C0000-0x00000000061DE000-memory.dmp

          memory/4544-23-0x0000000000400000-0x000000000043A000-memory.dmp

          memory/4544-46-0x00000000051A0000-0x00000000051AA000-memory.dmp

          memory/4964-5-0x0000000074ED0000-0x0000000075680000-memory.dmp

          memory/4964-12-0x0000000074ED0000-0x0000000075680000-memory.dmp

          memory/4964-28-0x0000000074ED0000-0x0000000075680000-memory.dmp

          memory/4964-0-0x0000000074EDE000-0x0000000074EDF000-memory.dmp

          memory/4964-3-0x0000000004E20000-0x0000000004EB2000-memory.dmp

          memory/4964-4-0x0000000074EDE000-0x0000000074EDF000-memory.dmp

          memory/4964-1-0x00000000002D0000-0x00000000003C2000-memory.dmp

          memory/4964-2-0x0000000005330000-0x00000000058D4000-memory.dmp

          memory/4964-11-0x0000000009020000-0x00000000090BC000-memory.dmp

          memory/4964-10-0x0000000006A30000-0x0000000006AAC000-memory.dmp

          memory/4964-9-0x0000000005940000-0x0000000005956000-memory.dmp

          memory/4964-8-0x0000000005910000-0x0000000005920000-memory.dmp

          memory/4964-7-0x0000000005310000-0x000000000532E000-memory.dmp

          memory/4964-6-0x0000000004EF0000-0x0000000004EFA000-memory.dmp