Analysis

  • max time kernel
    145s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    15-04-2022 00:48

General

  • Target

    6f6a956472613361087e326a732044349891e4ebaff99b2278836389cabdec01.exe

  • Size

    462KB

  • MD5

    48d86934fb781685122dfcdae8e4f256

  • SHA1

    538e07a3422df1b78540849ab02a69097435adf8

  • SHA256

    6f6a956472613361087e326a732044349891e4ebaff99b2278836389cabdec01

  • SHA512

    aacaa639400595e66ed86ed69619eae9c5f22882b1a3119d272f8b9af5f1d03212d800813ba66a09a3fd0bda3dbcd6ef6b14eeceafa9b61c40470525af989c16

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

niiarmah.kozow.com:9301

Mutex

ef42b77b-c8cc-45cb-b0b4-e774d77e37ba

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-08-21T18:37:07.916019536Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    9301

  • 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

    ef42b77b-c8cc-45cb-b0b4-e774d77e37ba

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    niiarmah.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.

  • ParallaxRat

    ParallaxRat is a multipurpose RAT written in MASM.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 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.

  • Delays execution with timeout.exe 1 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6f6a956472613361087e326a732044349891e4ebaff99b2278836389cabdec01.exe
    "C:\Users\Admin\AppData\Local\Temp\6f6a956472613361087e326a732044349891e4ebaff99b2278836389cabdec01.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1708
    • C:\Users\Admin\AppData\Local\Temp\svhost.exe
      "C:\Users\Admin\AppData\Local\Temp\svhost.exe"
      2⤵
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:1296
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c copy "C:/Users/Admin/AppData/Local/Temp/6f6a956472613361087e326a732044349891e4ebaff99b2278836389cabdec01.exe" "%appdata%\Security\Updates.exe" /Y
      2⤵
        PID:912
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "%appdata%\Security\Updates.exe.lnk" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:592
        • C:\Windows\SysWOW64\reg.exe
          reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Security\Updates.exe.lnk" /f
          3⤵
            PID:1388
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c echo [zoneTransfer]ZoneID = 2 > %appdata%\Security\Updates.exe:Zone.Identifier
          2⤵
          • NTFS ADS
          PID:860
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c ren "%appdata%\Security\Updates.exe.jpg" Updates.exe
          2⤵
            PID:1376
          • C:\Windows\SysWOW64\cmd.exe
            cmd /c C:\Users\Admin\AppData\Roaming\Security\Updates.exe.bat
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:240
            • C:\Windows\SysWOW64\timeout.exe
              timeout /t 300
              3⤵
              • Delays execution with timeout.exe
              PID:1068

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\svhost.exe

          Filesize

          255KB

          MD5

          9af17c8393f0970ee5136bd3ffa27001

          SHA1

          4b285b72c1a11285a25f31f2597e090da6bbc049

          SHA256

          71d6a7a3fe5f8dc878cd5bdeca0e09177efb85c01e9a8a10a95262cabefaa019

          SHA512

          b90f7de7d5ce72dccb264c7ba609e173c529b9d99ed9a63f88632bc58b1a994bbb727365f519c73b979f8918bd6de3c39a9f0347eb3a4bccdce4b2772a6516a3

        • C:\Users\Admin\AppData\Local\Temp\svhost.exe

          Filesize

          255KB

          MD5

          9af17c8393f0970ee5136bd3ffa27001

          SHA1

          4b285b72c1a11285a25f31f2597e090da6bbc049

          SHA256

          71d6a7a3fe5f8dc878cd5bdeca0e09177efb85c01e9a8a10a95262cabefaa019

          SHA512

          b90f7de7d5ce72dccb264c7ba609e173c529b9d99ed9a63f88632bc58b1a994bbb727365f519c73b979f8918bd6de3c39a9f0347eb3a4bccdce4b2772a6516a3

        • C:\Users\Admin\AppData\Roaming\Security\Updates.exe

          Filesize

          462KB

          MD5

          48d86934fb781685122dfcdae8e4f256

          SHA1

          538e07a3422df1b78540849ab02a69097435adf8

          SHA256

          6f6a956472613361087e326a732044349891e4ebaff99b2278836389cabdec01

          SHA512

          aacaa639400595e66ed86ed69619eae9c5f22882b1a3119d272f8b9af5f1d03212d800813ba66a09a3fd0bda3dbcd6ef6b14eeceafa9b61c40470525af989c16

        • C:\Users\Admin\AppData\Roaming\Security\Updates.exe.bat

          Filesize

          205B

          MD5

          89c271e144581e0e00347269b020a002

          SHA1

          ad9fe3d0aaf5579f17004982aa1ea53afee6d0d2

          SHA256

          fa4f71efddbbc88768574504f59ca283911cb40cc0ca52185e782436342945a8

          SHA512

          ea099eaf12aa74947171f861af1ee2223178942c722b08e45158dfb85c32fe6f38d61b5f5fea86223b5faede58f32cb6d0661cbdc9a29b78918e9b057bde1ed1

        • \Users\Admin\AppData\Local\Temp\svhost.exe

          Filesize

          255KB

          MD5

          9af17c8393f0970ee5136bd3ffa27001

          SHA1

          4b285b72c1a11285a25f31f2597e090da6bbc049

          SHA256

          71d6a7a3fe5f8dc878cd5bdeca0e09177efb85c01e9a8a10a95262cabefaa019

          SHA512

          b90f7de7d5ce72dccb264c7ba609e173c529b9d99ed9a63f88632bc58b1a994bbb727365f519c73b979f8918bd6de3c39a9f0347eb3a4bccdce4b2772a6516a3

        • \Users\Admin\AppData\Roaming\Security\Updates.exe

          Filesize

          462KB

          MD5

          48d86934fb781685122dfcdae8e4f256

          SHA1

          538e07a3422df1b78540849ab02a69097435adf8

          SHA256

          6f6a956472613361087e326a732044349891e4ebaff99b2278836389cabdec01

          SHA512

          aacaa639400595e66ed86ed69619eae9c5f22882b1a3119d272f8b9af5f1d03212d800813ba66a09a3fd0bda3dbcd6ef6b14eeceafa9b61c40470525af989c16

        • memory/1296-62-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1296-71-0x00000000005F0000-0x000000000060E000-memory.dmp

          Filesize

          120KB

        • memory/1296-72-0x0000000000610000-0x000000000061A000-memory.dmp

          Filesize

          40KB

        • memory/1296-68-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1296-66-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1296-56-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1296-70-0x00000000005E0000-0x00000000005EA000-memory.dmp

          Filesize

          40KB

        • memory/1296-57-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1296-60-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1296-59-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1708-54-0x0000000001190000-0x000000000120A000-memory.dmp

          Filesize

          488KB