Analysis

  • max time kernel
    90s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/11/2022, 20:31

General

  • Target

    ed762eadb77c47c6c41a128a73044bc2f78eeae23692f3017ce69d77ae48ea92.exe

  • Size

    3.0MB

  • MD5

    aca7952ccf72c0bd438dfe5165b187ae

  • SHA1

    40552bb8b478d7bf0aedc22cce41e9a939744311

  • SHA256

    ed762eadb77c47c6c41a128a73044bc2f78eeae23692f3017ce69d77ae48ea92

  • SHA512

    30af5757ea07276f22ae8a04cafbfb74982d367baf98c72c5dd511de79001cb70930e6dcd7284de86d2bb6d918edfd40e9d26f4b75a504eea3fa3723f3e8c1d2

  • SSDEEP

    49152:JGrE9/ITn4sOwVSb1+/zS7vBUMMS5dhQLt01oS4Q+6Gx9p50ry+9nfya:ejkbuO7BUMMS5dhQ61oF/6UpkHVB

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\ed762eadb77c47c6c41a128a73044bc2f78eeae23692f3017ce69d77ae48ea92.exe
    "C:\Users\Admin\AppData\Local\Temp\ed762eadb77c47c6c41a128a73044bc2f78eeae23692f3017ce69d77ae48ea92.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3488
    • C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\m513puIx.exe
      2⤵
      • Executes dropped EXE
      PID:3504
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ed762eadb77c47c6c41a128a73044bc2f78eeae23692f3017ce69d77ae48ea92.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\ed762eadb77c47c6c41a128a73044bc2f78eeae23692f3017ce69d77ae48ea92.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:824
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "ed762eadb77c47c6c41a128a73044bc2f78eeae23692f3017ce69d77ae48ea92.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3560

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\m513puIx.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\m513puIx.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/3488-132-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/3488-133-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/3488-134-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/3488-138-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/3488-142-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/3488-145-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB