Analysis

  • max time kernel
    157s
  • max time network
    161s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    15-02-2022 07:16

General

  • Target

    a985e6243988c8f0d6efc9b9688517a1da5ea8b88dab77587865ff60fac98196.exe

  • Size

    3.1MB

  • MD5

    a04867c5f9d320599b65764601f975e2

  • SHA1

    6a8377a8b63d8dbaa32c8595c899694a86c4a527

  • SHA256

    a985e6243988c8f0d6efc9b9688517a1da5ea8b88dab77587865ff60fac98196

  • SHA512

    c908c0436a6d50a41f26e701f96d3e85fc23ae44c98ef747d6e21d50239c8d41930fea7aefd9178a07bd5372f180a0db0261252f4f7625660a158d207fc0c2f4

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Blocklisted process makes network request 1 IoCs
  • Executes dropped EXE 3 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.

  • Loads dropped DLL 1 IoCs
  • Themida packer 5 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a985e6243988c8f0d6efc9b9688517a1da5ea8b88dab77587865ff60fac98196.exe
    "C:\Users\Admin\AppData\Local\Temp\a985e6243988c8f0d6efc9b9688517a1da5ea8b88dab77587865ff60fac98196.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:2380
    • C:\Users\Admin\AppData\Local\Temp\hempen\clayer.exe
      "C:\Users\Admin\AppData\Local\Temp\hempen\clayer.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:1696
      • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe
        "C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: AddClipboardFormatListener
        PID:4256
    • C:\Users\Admin\AppData\Local\Temp\hempen\forbarvp.exe
      "C:\Users\Admin\AppData\Local\Temp\hempen\forbarvp.exe"
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Checks computer location settings
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Checks processor information in registry
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2208
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\snkmuyv.vbs"
        3⤵
          PID:3396
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\mtpvwynmef.vbs"
          3⤵
          • Blocklisted process makes network request
          PID:4400
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
      1⤵
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:2392
    • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
      C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
      1⤵
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:4312

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Virtualization/Sandbox Evasion

    1
    T1497

    Discovery

    Query Registry

    4
    T1012

    Virtualization/Sandbox Evasion

    1
    T1497

    System Information Discovery

    5
    T1082

    Command and Control

    Web Service

    1
    T1102

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\103621DE9CD5414CC2538780B4B75751
      MD5

      54e9306f95f32e50ccd58af19753d929

      SHA1

      eab9457321f34d4dcf7d4a0ac83edc9131bf7c57

      SHA256

      45f94dceb18a8f738a26da09ce4558995a4fe02b971882e8116fc9b59813bb72

      SHA512

      8711a4d866f21cdf4d4e6131ec4cfaf6821d0d22b90946be8b5a09ab868af0270a89bc326f03b858f0361a83c11a1531b894dfd1945e4812ba429a7558791f4f

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\103621DE9CD5414CC2538780B4B75751
      MD5

      45b54f39adcc2ad93fc2807ddd2510a2

      SHA1

      7c9eb0e0541977bb484d23ca1ddf56a0bf064f97

      SHA256

      5c770e06100a5b8e6ac92b55f1d1f9de2179a6c1edc923e919b8a91355a06857

      SHA512

      7555792a11a71460930a02461c8fc72e31d56dd01d2fb448664a0e3749e609192b343c1636ad61d2de60b220b62233bc633b0223c4a97e0ee3bed3feb512c6af

    • C:\Users\Admin\AppData\Local\Temp\hempen\clayer.exe
      MD5

      a9b07ab88765c14f3a37ddaa3548bbea

      SHA1

      64e57975e760302e17ef0821e208d178035d0d1c

      SHA256

      8f6ac9c6b7c5b8012b5d47f5d7a0d5dafe0ccd05c6f1d5de1bec2230bd4b1b17

      SHA512

      eec12c491cbe959227ee064426206da47582a1d0168e9b4de8007068056d0052fc75bd2d792c3779860982c9b159168d9c807af5f40ff606d47c7130ccef2a33

    • C:\Users\Admin\AppData\Local\Temp\hempen\clayer.exe
      MD5

      a9b07ab88765c14f3a37ddaa3548bbea

      SHA1

      64e57975e760302e17ef0821e208d178035d0d1c

      SHA256

      8f6ac9c6b7c5b8012b5d47f5d7a0d5dafe0ccd05c6f1d5de1bec2230bd4b1b17

      SHA512

      eec12c491cbe959227ee064426206da47582a1d0168e9b4de8007068056d0052fc75bd2d792c3779860982c9b159168d9c807af5f40ff606d47c7130ccef2a33

    • C:\Users\Admin\AppData\Local\Temp\hempen\forbarvp.exe
      MD5

      db9f562738a4cd6adbfde0669264da02

      SHA1

      350c4acbd7a7b26e3ef5d4aaaecf660c7a8a07d1

      SHA256

      52ce26bf711a0d2ea410e325fdb0acc1b81d3305c421b0fa2a882780a0c7c191

      SHA512

      35b7d1f9f40e49563092c523a0a27554d22e8587e3378aea46711d20c155ac2746d24c19c15c7db3a915480e04ef738d6d19cac6a5ce1c6b881a506b2ee968e7

    • C:\Users\Admin\AppData\Local\Temp\hempen\forbarvp.exe
      MD5

      db9f562738a4cd6adbfde0669264da02

      SHA1

      350c4acbd7a7b26e3ef5d4aaaecf660c7a8a07d1

      SHA256

      52ce26bf711a0d2ea410e325fdb0acc1b81d3305c421b0fa2a882780a0c7c191

      SHA512

      35b7d1f9f40e49563092c523a0a27554d22e8587e3378aea46711d20c155ac2746d24c19c15c7db3a915480e04ef738d6d19cac6a5ce1c6b881a506b2ee968e7

    • C:\Users\Admin\AppData\Local\Temp\mtpvwynmef.vbs
      MD5

      d956dc58076990f6c46204c2092c68d8

      SHA1

      776c3549aee65fa76a029626e72ff1bb308be865

      SHA256

      b40816e298b76558e7413eab7a5c50d92cebb97395417d44d4d2305fbd39332c

      SHA512

      450ec63c5a50459bca03369146c4c9dd8aeb01e4b98921163a3487a469e7a91ab6375e8c2844ae8c5010d30ef3c5ccaf10924afc7ec1deb9c316cc99eb0769c3

    • C:\Users\Admin\AppData\Local\Temp\nsp5727.tmp\UAC.dll
      MD5

      adb29e6b186daa765dc750128649b63d

      SHA1

      160cbdc4cb0ac2c142d361df138c537aa7e708c9

      SHA256

      2f7f8fc05dc4fd0d5cda501b47e4433357e887bbfed7292c028d99c73b52dc08

      SHA512

      b28adcccf0c33660fecd6f95f28f11f793dc9988582187617b4c113fb4e6fdad4cf7694cd8c0300a477e63536456894d119741a940dda09b7df3ff0087a7eada

    • C:\Users\Admin\AppData\Local\Temp\snkmuyv.vbs
      MD5

      94a63239575cfa837147e1d13bdd56ce

      SHA1

      a35287332eeb690209810f9e459e5391aa7ee4fe

      SHA256

      f05303d0c42a88e092602d8f4dbf1fafbefa1c24de36f72529e76777bc35bcb3

      SHA512

      fe7e23e9a5bca7f047f55c1b780b48a3cb4bc5d17695c8cd515fba19863cd88d2340c834da3bb8446a7761e7a28b3ac25d51ddddfbeb67d165d8d518036e2754

    • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe
      MD5

      a9b07ab88765c14f3a37ddaa3548bbea

      SHA1

      64e57975e760302e17ef0821e208d178035d0d1c

      SHA256

      8f6ac9c6b7c5b8012b5d47f5d7a0d5dafe0ccd05c6f1d5de1bec2230bd4b1b17

      SHA512

      eec12c491cbe959227ee064426206da47582a1d0168e9b4de8007068056d0052fc75bd2d792c3779860982c9b159168d9c807af5f40ff606d47c7130ccef2a33

    • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe
      MD5

      a9b07ab88765c14f3a37ddaa3548bbea

      SHA1

      64e57975e760302e17ef0821e208d178035d0d1c

      SHA256

      8f6ac9c6b7c5b8012b5d47f5d7a0d5dafe0ccd05c6f1d5de1bec2230bd4b1b17

      SHA512

      eec12c491cbe959227ee064426206da47582a1d0168e9b4de8007068056d0052fc75bd2d792c3779860982c9b159168d9c807af5f40ff606d47c7130ccef2a33

    • memory/1696-144-0x0000000000690000-0x0000000000691000-memory.dmp
      Filesize

      4KB

    • memory/1696-145-0x0000000002410000-0x0000000002458000-memory.dmp
      Filesize

      288KB

    • memory/1696-143-0x0000000000402000-0x0000000000404000-memory.dmp
      Filesize

      8KB

    • memory/2208-135-0x0000000000D40000-0x000000000140B000-memory.dmp
      Filesize

      6.8MB

    • memory/2208-138-0x0000000000D40000-0x000000000140B000-memory.dmp
      Filesize

      6.8MB

    • memory/2208-137-0x00000000776E4000-0x00000000776E6000-memory.dmp
      Filesize

      8KB

    • memory/2208-136-0x0000000000D40000-0x000000000140B000-memory.dmp
      Filesize

      6.8MB

    • memory/2392-142-0x000001BC5D820000-0x000001BC5D824000-memory.dmp
      Filesize

      16KB

    • memory/2392-141-0x000001BC5B2F0000-0x000001BC5B300000-memory.dmp
      Filesize

      64KB

    • memory/2392-140-0x000001BC5ABA0000-0x000001BC5ABB0000-memory.dmp
      Filesize

      64KB

    • memory/4256-151-0x0000000000600000-0x0000000000601000-memory.dmp
      Filesize

      4KB

    • memory/4256-152-0x0000000002300000-0x0000000002348000-memory.dmp
      Filesize

      288KB