Analysis

  • max time kernel
    189s
  • max time network
    195s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/11/2022, 23:24

General

  • Target

    53d501bda1cbea8c870afa3f634e2d5753213e8c632269ef8af3bfb7df7ab5b9.exe

  • Size

    1.0MB

  • MD5

    bc56696bc6cafd86a83b0ab6508ae154

  • SHA1

    a4a32d81d18c75f8a60101b3beb360f5d6b025ea

  • SHA256

    53d501bda1cbea8c870afa3f634e2d5753213e8c632269ef8af3bfb7df7ab5b9

  • SHA512

    d50fb70b7efa75cb1d11622b54f4099d06bf436c4583a4d7265809139b21dda6752352ac9694a8565a167e11928a783c72769a2e67301ea8a0298aab69c77336

  • SSDEEP

    24576:wPsR1jOkYgFhGnpQ/qU7s7ix2eI/d0+V0Juimu:wPsjlNFwK/dyi+/dFim

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

mundodark.crabdance.com:1607

Mutex

aa3369d9-5059-4951-ab0d-215cbb3ab28b

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2015-03-10T23:59:17.272938636Z

  • 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

    1607

  • default_group

    NEW

  • 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

    aa3369d9-5059-4951-ab0d-215cbb3ab28b

  • mutex_timeout

    5000

  • prevent_system_sleep

    true

  • primary_connection_host

    mundodark.crabdance.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.

  • Executes dropped EXE 1 IoCs
  • 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
  • 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). Likely ransomware behaviour.

  • 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 9 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\53d501bda1cbea8c870afa3f634e2d5753213e8c632269ef8af3bfb7df7ab5b9.exe
    "C:\Users\Admin\AppData\Local\Temp\53d501bda1cbea8c870afa3f634e2d5753213e8c632269ef8af3bfb7df7ab5b9.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3416
    • C:\Users\Admin\AppData\Local\Temp\53d501bda1cbea8c870afa3f634e2d5753213e8c632269ef8af3bfb7df7ab5b9.exe
      "C:\Users\Admin\AppData\Local\Temp\53d501bda1cbea8c870afa3f634e2d5753213e8c632269ef8af3bfb7df7ab5b9.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2536
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DDP Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp77FF.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:4888
    • C:\Users\Admin\AppData\Roaming\Qvr.exe
      "C:\Users\Admin\AppData\Roaming\Qvr.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1912

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp77FF.tmp

          Filesize

          1KB

          MD5

          75c6b3efe5ea166948c6f98104908616

          SHA1

          592d393f274ef5774003c4dc5c275fc4e7c8a2f3

          SHA256

          3639fc800570e307fc64d7e31225ecef56fd9f1738c7ec4617bfdc17d2cdd7b6

          SHA512

          40f044a3b592d8b004fd701a4a4792d7eff0758b4418161083849b883d6ed3edffa9889b5c7baf88d59c0cc8a0741256ee20ef1b1a2838c93b01e06e75445840

        • C:\Users\Admin\AppData\Roaming\Qvr.INI

          Filesize

          1B

          MD5

          c4ca4238a0b923820dcc509a6f75849b

          SHA1

          356a192b7913b04c54574d18c28d46e6395428ab

          SHA256

          6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

          SHA512

          4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

        • C:\Users\Admin\AppData\Roaming\Qvr.exe

          Filesize

          631KB

          MD5

          098f0f8b67c1525a8cf1eedda1f653d7

          SHA1

          b4e0276c80ab4afc17946ea6cab4c3177d135ba9

          SHA256

          524d9788c388f7668f0c0d0287d0f06bab24784f57c6a76d19f3a8e94aff4005

          SHA512

          d70f5d7cf98ca392ac7de00170dc50cf6d15d4a21058ba1854f5711163274a143f4e8af0dd62d4041c1e8f3574c0265c4d26a0d569bfb50f1c2510c48bed236c

        • C:\Users\Admin\AppData\Roaming\Qvr.exe

          Filesize

          631KB

          MD5

          098f0f8b67c1525a8cf1eedda1f653d7

          SHA1

          b4e0276c80ab4afc17946ea6cab4c3177d135ba9

          SHA256

          524d9788c388f7668f0c0d0287d0f06bab24784f57c6a76d19f3a8e94aff4005

          SHA512

          d70f5d7cf98ca392ac7de00170dc50cf6d15d4a21058ba1854f5711163274a143f4e8af0dd62d4041c1e8f3574c0265c4d26a0d569bfb50f1c2510c48bed236c

        • memory/1912-147-0x00007FF8D0450000-0x00007FF8D0F11000-memory.dmp

          Filesize

          10.8MB

        • memory/1912-143-0x00000000003E0000-0x0000000000484000-memory.dmp

          Filesize

          656KB

        • memory/1912-148-0x00007FF8D0450000-0x00007FF8D0F11000-memory.dmp

          Filesize

          10.8MB

        • memory/1912-146-0x00007FF8D0450000-0x00007FF8D0F11000-memory.dmp

          Filesize

          10.8MB

        • memory/2536-137-0x0000000074880000-0x0000000074E31000-memory.dmp

          Filesize

          5.7MB

        • memory/2536-135-0x0000000074880000-0x0000000074E31000-memory.dmp

          Filesize

          5.7MB

        • memory/2536-134-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/3416-136-0x0000000074880000-0x0000000074E31000-memory.dmp

          Filesize

          5.7MB

        • memory/3416-145-0x0000000074880000-0x0000000074E31000-memory.dmp

          Filesize

          5.7MB

        • memory/3416-132-0x0000000074880000-0x0000000074E31000-memory.dmp

          Filesize

          5.7MB