Analysis

  • max time kernel
    107s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/12/2022, 23:41

General

  • Target

    file.exe

  • Size

    1.7MB

  • MD5

    686e01fe8868b40ea6a2245faa03c93a

  • SHA1

    e3a4044ea1cddf9bb39b7f951b9321468d04c22f

  • SHA256

    927cfa4f6978fb891d278511a3b94a9f4d09780e8da6ae3b792c8d7161c34830

  • SHA512

    5fb7737e09dc3c639e7b0d23dad5ce807d8e868ce7b071e5d2bcae9584e84376a34a345c70d615cbfcdabe242e37acd9bcb6901599c307b4b87fc79d526415d2

  • SSDEEP

    24576:Opni5chPp5Z+gUKA70gb8smCuBqS+3lwPslWWdcE3ngBWg7FygmuNzC00+DRf0DU:0iu5QgnA70u8DVJEQT/NmtgOrNK

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

  • NyMaim

    NyMaim is a malware with various capabilities written in C++ and first seen in 2013.

  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 17 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:792
    • C:\Users\Admin\AppData\Local\Temp\is-QEG5M.tmp\is-OS7DC.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-QEG5M.tmp\is-OS7DC.tmp" /SL4 $E0048 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1581777 96768
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:2124
      • C:\Program Files (x86)\Split Files\SplitFiles123.exe
        "C:\Program Files (x86)\Split Files\SplitFiles123.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:3432
        • C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\ddLFo02XahX59.exe
          4⤵
          • Executes dropped EXE
          PID:1264
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles123.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles123.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4648
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles123.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:4048

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.1MB

    MD5

    49a2490ada3f4c95e30b50bcb3c830d9

    SHA1

    02313717ecf2415bac4bd1248e89167bca366217

    SHA256

    c6b0975f6cebab1366d43cc4e7fe8e92735ba092bc2a0fbd6c444273188acbda

    SHA512

    8c47935320539ce52c1e9d652adbda6d3ad4a82c8cabfe9ba851284bf41e12f24ab6da3525a47a494b649007e784662d16fa943e79d594287881fdfd1e7b203e

  • C:\Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.1MB

    MD5

    49a2490ada3f4c95e30b50bcb3c830d9

    SHA1

    02313717ecf2415bac4bd1248e89167bca366217

    SHA256

    c6b0975f6cebab1366d43cc4e7fe8e92735ba092bc2a0fbd6c444273188acbda

    SHA512

    8c47935320539ce52c1e9d652adbda6d3ad4a82c8cabfe9ba851284bf41e12f24ab6da3525a47a494b649007e784662d16fa943e79d594287881fdfd1e7b203e

  • C:\Users\Admin\AppData\Local\Temp\is-22CNL.tmp\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-QEG5M.tmp\is-OS7DC.tmp

    Filesize

    688KB

    MD5

    807603f3a565337ee2ac3e819b25ee58

    SHA1

    5cc4e6c82fbdda6697a1117561f23731d51baacd

    SHA256

    682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423

    SHA512

    252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

  • C:\Users\Admin\AppData\Local\Temp\is-QEG5M.tmp\is-OS7DC.tmp

    Filesize

    688KB

    MD5

    807603f3a565337ee2ac3e819b25ee58

    SHA1

    5cc4e6c82fbdda6697a1117561f23731d51baacd

    SHA256

    682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423

    SHA512

    252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

  • C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\ddLFo02XahX59.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\ddLFo02XahX59.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/792-138-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/792-156-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/792-132-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/3432-143-0x0000000000400000-0x000000000151A000-memory.dmp

    Filesize

    17.1MB

  • memory/3432-144-0x0000000000400000-0x000000000151A000-memory.dmp

    Filesize

    17.1MB

  • memory/3432-142-0x0000000000400000-0x000000000151A000-memory.dmp

    Filesize

    17.1MB

  • memory/3432-148-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/3432-152-0x0000000000400000-0x000000000151A000-memory.dmp

    Filesize

    17.1MB

  • memory/3432-155-0x0000000000400000-0x000000000151A000-memory.dmp

    Filesize

    17.1MB