Analysis

  • max time kernel
    118s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • 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 4 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Loads dropped DLL 9 IoCs
  • Themida packer 8 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
  • 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.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 28 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:1600
    • C:\Users\Admin\AppData\Local\Temp\hempen\clayer.exe
      "C:\Users\Admin\AppData\Local\Temp\hempen\clayer.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:1916
    • 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
      • Loads dropped DLL
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:268
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\cpyaxsd.vbs"
        3⤵
          PID:1784
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\pooajhl.vbs"
          3⤵
          • Blocklisted process makes network request
          PID:1588

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Virtualization/Sandbox Evasion

    1
    T1497

    Discovery

    Query Registry

    3
    T1012

    Virtualization/Sandbox Evasion

    1
    T1497

    System Information Discovery

    4
    T1082

    Command and Control

    Web Service

    1
    T1102

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      efae82caeffabeeba25e327d1ade9b43

      SHA1

      e23becfea9a76ecbbce5819e8caa962e15c2036b

      SHA256

      6fc79d8e720d3461931d289d38a638dcc1b25f5d10ff73f146cdf8526a78510e

      SHA512

      497cbeb95c212c682c3a2602615d30145ad51898f1aae92b06a6d79616ab9b8f26aef4215df284d8be787aef242d49950386fd425eff76cd7da8c58bf81ad9ce

    • 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\pooajhl.vbs
      MD5

      e5c8a7a1c9a7270f2c2ffe16ccda5252

      SHA1

      d1f2818cad5de689285d70734a91bd0a1176135b

      SHA256

      ad2c97470e15c64a276875d2e426e04d4efd99bef0a01b0aa1e78764136e37ce

      SHA512

      85ab429e811f7594a82bab0e25e174bdb2f2e5d20f725b45201b2eca1f007c14f2e90a5405cf7b50b3ca487ab6c9bf50e6ab84675f6c868fb42eec8386b8e74e

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

      a9b07ab88765c14f3a37ddaa3548bbea

      SHA1

      64e57975e760302e17ef0821e208d178035d0d1c

      SHA256

      8f6ac9c6b7c5b8012b5d47f5d7a0d5dafe0ccd05c6f1d5de1bec2230bd4b1b17

      SHA512

      eec12c491cbe959227ee064426206da47582a1d0168e9b4de8007068056d0052fc75bd2d792c3779860982c9b159168d9c807af5f40ff606d47c7130ccef2a33

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

      a9b07ab88765c14f3a37ddaa3548bbea

      SHA1

      64e57975e760302e17ef0821e208d178035d0d1c

      SHA256

      8f6ac9c6b7c5b8012b5d47f5d7a0d5dafe0ccd05c6f1d5de1bec2230bd4b1b17

      SHA512

      eec12c491cbe959227ee064426206da47582a1d0168e9b4de8007068056d0052fc75bd2d792c3779860982c9b159168d9c807af5f40ff606d47c7130ccef2a33

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

      a9b07ab88765c14f3a37ddaa3548bbea

      SHA1

      64e57975e760302e17ef0821e208d178035d0d1c

      SHA256

      8f6ac9c6b7c5b8012b5d47f5d7a0d5dafe0ccd05c6f1d5de1bec2230bd4b1b17

      SHA512

      eec12c491cbe959227ee064426206da47582a1d0168e9b4de8007068056d0052fc75bd2d792c3779860982c9b159168d9c807af5f40ff606d47c7130ccef2a33

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

      a9b07ab88765c14f3a37ddaa3548bbea

      SHA1

      64e57975e760302e17ef0821e208d178035d0d1c

      SHA256

      8f6ac9c6b7c5b8012b5d47f5d7a0d5dafe0ccd05c6f1d5de1bec2230bd4b1b17

      SHA512

      eec12c491cbe959227ee064426206da47582a1d0168e9b4de8007068056d0052fc75bd2d792c3779860982c9b159168d9c807af5f40ff606d47c7130ccef2a33

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

      a9b07ab88765c14f3a37ddaa3548bbea

      SHA1

      64e57975e760302e17ef0821e208d178035d0d1c

      SHA256

      8f6ac9c6b7c5b8012b5d47f5d7a0d5dafe0ccd05c6f1d5de1bec2230bd4b1b17

      SHA512

      eec12c491cbe959227ee064426206da47582a1d0168e9b4de8007068056d0052fc75bd2d792c3779860982c9b159168d9c807af5f40ff606d47c7130ccef2a33

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

      db9f562738a4cd6adbfde0669264da02

      SHA1

      350c4acbd7a7b26e3ef5d4aaaecf660c7a8a07d1

      SHA256

      52ce26bf711a0d2ea410e325fdb0acc1b81d3305c421b0fa2a882780a0c7c191

      SHA512

      35b7d1f9f40e49563092c523a0a27554d22e8587e3378aea46711d20c155ac2746d24c19c15c7db3a915480e04ef738d6d19cac6a5ce1c6b881a506b2ee968e7

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

      db9f562738a4cd6adbfde0669264da02

      SHA1

      350c4acbd7a7b26e3ef5d4aaaecf660c7a8a07d1

      SHA256

      52ce26bf711a0d2ea410e325fdb0acc1b81d3305c421b0fa2a882780a0c7c191

      SHA512

      35b7d1f9f40e49563092c523a0a27554d22e8587e3378aea46711d20c155ac2746d24c19c15c7db3a915480e04ef738d6d19cac6a5ce1c6b881a506b2ee968e7

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

      db9f562738a4cd6adbfde0669264da02

      SHA1

      350c4acbd7a7b26e3ef5d4aaaecf660c7a8a07d1

      SHA256

      52ce26bf711a0d2ea410e325fdb0acc1b81d3305c421b0fa2a882780a0c7c191

      SHA512

      35b7d1f9f40e49563092c523a0a27554d22e8587e3378aea46711d20c155ac2746d24c19c15c7db3a915480e04ef738d6d19cac6a5ce1c6b881a506b2ee968e7

    • \Users\Admin\AppData\Local\Temp\nsnC8BC.tmp\UAC.dll
      MD5

      adb29e6b186daa765dc750128649b63d

      SHA1

      160cbdc4cb0ac2c142d361df138c537aa7e708c9

      SHA256

      2f7f8fc05dc4fd0d5cda501b47e4433357e887bbfed7292c028d99c73b52dc08

      SHA512

      b28adcccf0c33660fecd6f95f28f11f793dc9988582187617b4c113fb4e6fdad4cf7694cd8c0300a477e63536456894d119741a940dda09b7df3ff0087a7eada

    • memory/268-70-0x0000000000BE0000-0x00000000012AB000-memory.dmp
      Filesize

      6.8MB

    • memory/268-71-0x0000000000BE0000-0x00000000012AB000-memory.dmp
      Filesize

      6.8MB

    • memory/268-72-0x0000000076F80000-0x0000000076F82000-memory.dmp
      Filesize

      8KB

    • memory/268-73-0x0000000000BE0000-0x00000000012AB000-memory.dmp
      Filesize

      6.8MB

    • memory/1600-54-0x0000000075471000-0x0000000075473000-memory.dmp
      Filesize

      8KB

    • memory/1916-78-0x0000000000402000-0x0000000000404000-memory.dmp
      Filesize

      8KB

    • memory/1916-80-0x00000000009F0000-0x0000000000A38000-memory.dmp
      Filesize

      288KB

    • memory/1916-79-0x00000000009F0000-0x0000000000A38000-memory.dmp
      Filesize

      288KB

    • memory/1916-81-0x0000000000250000-0x0000000000251000-memory.dmp
      Filesize

      4KB

    • memory/1916-82-0x00000000009F0000-0x0000000000A38000-memory.dmp
      Filesize

      288KB