Analysis

  • max time kernel
    90s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-08-2022 18:36

General

  • Target

    04744d68089e1df52c65fded5fc4b78b.exe

  • Size

    697KB

  • MD5

    04744d68089e1df52c65fded5fc4b78b

  • SHA1

    86877b212396f40ec8a7bcd45ac4b8a5f68a884b

  • SHA256

    196fffbae1c2c00c4cdf52ec8547e07b012b11616a3e923f83d12e37d029af91

  • SHA512

    2fbc456bd32626b5165b6131c349595059e9d18e9b787e0f2b07712b0e10065f0730b423c4b9653ebfedd0b15c83a914352dded63c6ed2aaf173bb4f1c07dcf2

  • SSDEEP

    12288:9XHok11R/5PR+/SyeFX62G9/R/kjI28j0Hha3yRZ0QFu3+NjLLyqWP:dHBPnyeFX6h4s28j0Hha3iv2SPZW

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

updatedhostlogs.duckdns.org:15440

127.0.0.1:15440

Mutex

4d2e43d2-7711-42b4-aaa9-39d47a0f2cf9

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-05-29T02:50:37.913192336Z

  • 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

    15440

  • default_group

    Stiler

  • 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

    4d2e43d2-7711-42b4-aaa9-39d47a0f2cf9

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    updatedhostlogs.duckdns.org

  • primary_dns_server

    8.8.8.8

  • 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.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • 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
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • 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). Likely ransomware behaviour.

  • 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 14 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\04744d68089e1df52c65fded5fc4b78b.exe
    "C:\Users\Admin\AppData\Local\Temp\04744d68089e1df52c65fded5fc4b78b.exe"
    1⤵
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks computer location settings
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4392
    • 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\04744d68089e1df52c65fded5fc4b78b.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1128
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\vuvGuoOt.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2308
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vuvGuoOt" /XML "C:\Users\Admin\AppData\Local\Temp\tmp320C.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4372
    • C:\Users\Admin\AppData\Local\Temp\04744d68089e1df52c65fded5fc4b78b.exe
      "C:\Users\Admin\AppData\Local\Temp\04744d68089e1df52c65fded5fc4b78b.exe"
      2⤵
        PID:4740
      • C:\Users\Admin\AppData\Local\Temp\04744d68089e1df52c65fded5fc4b78b.exe
        "C:\Users\Admin\AppData\Local\Temp\04744d68089e1df52c65fded5fc4b78b.exe"
        2⤵
        • Adds Run key to start application
        • Checks whether UAC is enabled
        • Drops file in Program Files directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1500
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks.exe" /create /f /tn "DDP Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp3652.tmp"
          3⤵
          • Creates scheduled task(s)
          PID:3844
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks.exe" /create /f /tn "DDP Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp37CA.tmp"
          3⤵
          • Creates scheduled task(s)
          PID:3268

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\04744d68089e1df52c65fded5fc4b78b.exe.log

      Filesize

      1KB

      MD5

      e08f822522c617a40840c62e4b0fb45e

      SHA1

      ae516dca4da5234be6676d3f234c19ec55725be7

      SHA256

      bd9d5e9f7fe6fcff17d873555d4077d15f7d6cdda1183e7f7d278b735ffe1fd7

      SHA512

      894a7fb7bbc18ac6ba13378f58a7db80ad00d6080be9a66b01cae8e23e41d9d2d4cd53c1e20669356b73590c8a3ebfda4bdda3258f81240db56c4a81b7313fe4

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

      Filesize

      2KB

      MD5

      3d086a433708053f9bf9523e1d87a4e8

      SHA1

      b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

      SHA256

      6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

      SHA512

      931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      18KB

      MD5

      163b00e080a2cd9fe02d8fe8c56d60b1

      SHA1

      f4b361bdb1c1a19fe84ff46e7fabf1253588e830

      SHA256

      ed5daa0d44f5e9a31362893682b29ead9bc6bbb74c3568ead146c5f9678f3199

      SHA512

      5ee70ec24eb8485f0664d8f4cd59e0ffafc934328ebfc2432e37b20961eeb42d0f5b047938509d7bc2886fc7f99bf366a0f7d1098c3ab3fa9ce725bf05fd6788

    • C:\Users\Admin\AppData\Local\Temp\tmp320C.tmp

      Filesize

      1KB

      MD5

      f49876707e9c12403c7d1fcd9e97bf2f

      SHA1

      975e2e6689aae80b8aff0f091c2018a2956a779c

      SHA256

      99eea34eea03e31704aa094d6b968655f02ba899a6d8beb3e3113b1cb9acca76

      SHA512

      dc34c61cbff5a8aba2c629e8160ade46fc3187130110abb3cfbc3e784badbe2076d7d4524f58e8d886dd3b7508b95ca82eb77c34278c2367cd2f7d5692d6e45c

    • C:\Users\Admin\AppData\Local\Temp\tmp3652.tmp

      Filesize

      1KB

      MD5

      771d415e7e367a38ded7099e97f3baf2

      SHA1

      cf4ebf514926ec70be996e495dbe8dbaf66d32d8

      SHA256

      60c69361b7f874a41a884852f9faaff711e48966b54c21cbf824f971e9da27dd

      SHA512

      186d305116faf62185f34e6f22b86fac317f83699bda05bc8be54be67d93bf91f0702392111be233bfda9814278434951c67e216afafa30e09be77f810799601

    • C:\Users\Admin\AppData\Local\Temp\tmp37CA.tmp

      Filesize

      1KB

      MD5

      2271642ca970891700e3f48439739ed8

      SHA1

      cd472df2349f7db9e1e460d0ee28acd97b8a8793

      SHA256

      7aba66abbcb0b13455609174db23aed495a9adbef0e0acd28baa9c92445eda68

      SHA512

      4669a4ef8ec28cdb852ffc1401576b1bf9a9d837797d7d92bc88c18b3097404f36854e50167b309706fef400cabc43c876569ce2797ba85eb169a2783b8fe807

    • memory/1128-140-0x00000000055E0000-0x0000000005C08000-memory.dmp

      Filesize

      6.2MB

    • memory/1128-139-0x0000000002BB0000-0x0000000002BE6000-memory.dmp

      Filesize

      216KB

    • memory/1128-159-0x0000000007EB0000-0x000000000852A000-memory.dmp

      Filesize

      6.5MB

    • memory/1128-156-0x0000000070E80000-0x0000000070ECC000-memory.dmp

      Filesize

      304KB

    • memory/1128-158-0x0000000006A50000-0x0000000006A6E000-memory.dmp

      Filesize

      120KB

    • memory/1128-143-0x0000000005500000-0x0000000005522000-memory.dmp

      Filesize

      136KB

    • memory/1128-144-0x0000000005D10000-0x0000000005D76000-memory.dmp

      Filesize

      408KB

    • memory/1128-137-0x0000000000000000-mapping.dmp

    • memory/1128-161-0x0000000007840000-0x000000000784A000-memory.dmp

      Filesize

      40KB

    • memory/1128-162-0x0000000007A50000-0x0000000007AE6000-memory.dmp

      Filesize

      600KB

    • memory/1128-150-0x00000000064B0000-0x00000000064CE000-memory.dmp

      Filesize

      120KB

    • memory/1500-147-0x0000000000000000-mapping.dmp

    • memory/1500-148-0x0000000000400000-0x000000000043A000-memory.dmp

      Filesize

      232KB

    • memory/2308-141-0x0000000000000000-mapping.dmp

    • memory/2308-164-0x0000000007CC0000-0x0000000007CDA000-memory.dmp

      Filesize

      104KB

    • memory/2308-165-0x0000000007CA0000-0x0000000007CA8000-memory.dmp

      Filesize

      32KB

    • memory/2308-163-0x0000000007BB0000-0x0000000007BBE000-memory.dmp

      Filesize

      56KB

    • memory/2308-155-0x0000000006C30000-0x0000000006C62000-memory.dmp

      Filesize

      200KB

    • memory/2308-157-0x0000000070E80000-0x0000000070ECC000-memory.dmp

      Filesize

      304KB

    • memory/2308-160-0x0000000007980000-0x000000000799A000-memory.dmp

      Filesize

      104KB

    • memory/3268-153-0x0000000000000000-mapping.dmp

    • memory/3844-151-0x0000000000000000-mapping.dmp

    • memory/4372-142-0x0000000000000000-mapping.dmp

    • memory/4392-132-0x0000000000FB0000-0x0000000001064000-memory.dmp

      Filesize

      720KB

    • memory/4392-138-0x000000000C4E0000-0x000000000C546000-memory.dmp

      Filesize

      408KB

    • memory/4392-136-0x000000000BAC0000-0x000000000BB5C000-memory.dmp

      Filesize

      624KB

    • memory/4392-135-0x0000000005A10000-0x0000000005A1A000-memory.dmp

      Filesize

      40KB

    • memory/4392-134-0x0000000005AD0000-0x0000000005B62000-memory.dmp

      Filesize

      584KB

    • memory/4392-133-0x0000000006080000-0x0000000006624000-memory.dmp

      Filesize

      5.6MB

    • memory/4740-146-0x0000000000000000-mapping.dmp