Analysis

  • max time kernel
    78s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/11/2022, 20:24

General

  • Target

    c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe

  • Size

    3.2MB

  • MD5

    6937bcab74d24c82aefbcab2fcfb6e8b

  • SHA1

    8735dad4184444610383f69ccccd2a5eb50c2f26

  • SHA256

    c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa

  • SHA512

    702cae8da468ae8655e3898948e4862474dba01bd024fa78246f62e05479f39daba92317047952508b999dff496af200d1caaf4cc8b032f509fa140fa2979016

  • SSDEEP

    49152:X3hUShjLvkBVSb1+/zS7vBUMMS5dhQLt01oS4BgbOmVCBlp3wvvnZ1x:CBkbuO7BUMMS5dhQ61oFBAOmYlNWvZH

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 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe
    "C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4828
    • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\pBbS5dk4.exe
      2⤵
      • Executes dropped EXE
      PID:60
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4652
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3528

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\pBbS5dk4.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\pBbS5dk4.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/4828-133-0x0000000000400000-0x0000000001532000-memory.dmp

          Filesize

          17.2MB

        • memory/4828-132-0x0000000000400000-0x0000000001532000-memory.dmp

          Filesize

          17.2MB

        • memory/4828-134-0x0000000000400000-0x0000000001532000-memory.dmp

          Filesize

          17.2MB

        • memory/4828-138-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/4828-142-0x0000000000400000-0x0000000001532000-memory.dmp

          Filesize

          17.2MB

        • memory/4828-145-0x0000000000400000-0x0000000001532000-memory.dmp

          Filesize

          17.2MB