Analysis

  • max time kernel
    91s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/12/2022, 01:46

General

  • Target

    file.exe

  • Size

    1.8MB

  • MD5

    218adad0e2b2cb583095e5d502a8a253

  • SHA1

    f8a1aa0d9baad50a2855bc1b248c0b08a37c39de

  • SHA256

    691ff95223c2b3ebf506c212d8124b2e95d36615212b9dc0bd2d2d6c0ef0cbd1

  • SHA512

    63b9713b3d52cd7b48f83d11af1ab6039e562fd8686bfa0b0c1a2674de96a6a8a1082f18257a338e9ab5a225656df72a46724f977da87321774156edf9bef37b

  • SSDEEP

    49152:btVP4DLqXGISpMO0G0gPMabh7Q1hWP7p32:btVgq7gMO0G0gF+hGd2

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:1988
    • C:\Users\Admin\AppData\Local\Temp\is-BPGP2.tmp\is-AKUQH.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-BPGP2.tmp\is-AKUQH.tmp" /SL4 $A004E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1648331 133120
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1488
      • C:\Program Files (x86)\Split Files\SplitFiles117.exe
        "C:\Program Files (x86)\Split Files\SplitFiles117.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4812
        • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\VmOum2BPCL.exe
          4⤵
          • Executes dropped EXE
          PID:4660
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles117.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles117.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:204
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles117.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1952

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\Split Files\SplitFiles117.exe

          Filesize

          3.2MB

          MD5

          3ef27a8f5089ffc9cbe2cea20c758bc8

          SHA1

          8189afbb63e9b99c0792f6239c490ece3be0b904

          SHA256

          243aa16255ffbeef7d788896ead7ca6446eb9830082f789bfcd48dd13982d23a

          SHA512

          78ce587d08df9ff1e5378d6e324f3575eee38e52c3835a1bf99bbaab0333266e0d643b48fba07ed6de573d524fd837011eca01ac0516a1ab8da2da2c5b6bf770

        • C:\Program Files (x86)\Split Files\SplitFiles117.exe

          Filesize

          3.2MB

          MD5

          3ef27a8f5089ffc9cbe2cea20c758bc8

          SHA1

          8189afbb63e9b99c0792f6239c490ece3be0b904

          SHA256

          243aa16255ffbeef7d788896ead7ca6446eb9830082f789bfcd48dd13982d23a

          SHA512

          78ce587d08df9ff1e5378d6e324f3575eee38e52c3835a1bf99bbaab0333266e0d643b48fba07ed6de573d524fd837011eca01ac0516a1ab8da2da2c5b6bf770

        • C:\Users\Admin\AppData\Local\Temp\is-BPGP2.tmp\is-AKUQH.tmp

          Filesize

          723KB

          MD5

          7fd7ec3d32ed2a377fa18e8931475b2e

          SHA1

          30b386da1750701f78cbf65550f32661d8a4175f

          SHA256

          0290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455

          SHA512

          db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334

        • C:\Users\Admin\AppData\Local\Temp\is-BPGP2.tmp\is-AKUQH.tmp

          Filesize

          723KB

          MD5

          7fd7ec3d32ed2a377fa18e8931475b2e

          SHA1

          30b386da1750701f78cbf65550f32661d8a4175f

          SHA256

          0290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455

          SHA512

          db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334

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

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\VmOum2BPCL.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\VmOum2BPCL.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1988-151-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB

        • memory/1988-132-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB

        • memory/1988-134-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB

        • memory/1988-156-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB

        • memory/4812-143-0x0000000000400000-0x0000000001530000-memory.dmp

          Filesize

          17.2MB

        • memory/4812-142-0x0000000000400000-0x0000000001530000-memory.dmp

          Filesize

          17.2MB

        • memory/4812-147-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/4812-152-0x0000000000400000-0x0000000001530000-memory.dmp

          Filesize

          17.2MB

        • memory/4812-155-0x0000000000400000-0x0000000001530000-memory.dmp

          Filesize

          17.2MB