Analysis

  • max time kernel
    114s
  • max time network
    132s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/12/2022, 06:18

General

  • Target

    file.exe

  • Size

    3.4MB

  • MD5

    4f9d28076523bae441a0df53c41a1be2

  • SHA1

    29b9aa07e9e49e63436c666a4a1bc512d978c9ec

  • SHA256

    16abcb87b5b04dbbdf3d3b4b26c2372fed244e618871e38972d2b71670e96477

  • SHA512

    4d3086b2a35aa09c20d607c440bf0302865788f89f24d8a209362eab5f896222de1a5fad42027407be84569e7ada8e659ad42dc3f7c230bfc9615fd54bf88629

  • SSDEEP

    98304:sQniT46n8wxsKe/v4AnqD1WjmfnFfmITCWfLXcyr:9iTZ8nKeH4AnYcjanMIeWfLXcyr

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 9 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:1504
    • C:\Users\Admin\AppData\Local\Temp\is-7SGBS.tmp\is-NCIOQ.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-7SGBS.tmp\is-NCIOQ.tmp" /SL4 $1201C8 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3324874 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:4840
      • C:\Program Files (x86)\PrintFolders\PrintFolders.exe
        "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1032
        • C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\XTBFLJLTJ.exe
          4⤵
          • Executes dropped EXE
          PID:4472
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3820
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "PrintFolders.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:2496

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\PrintFolders\PrintFolders.exe

          Filesize

          5.8MB

          MD5

          32c99c82eac89d46fb0228419b1055ca

          SHA1

          cb26d2383dcfb9cc396605684e5fda77751226e9

          SHA256

          d3552df9ec71a9f00e59b961dcd2570ff5f3d315119abd0b23cbf9b857caa139

          SHA512

          8455306efcecea72d80906a7b4390b95acb6e582e0ba7c04e6338817f84744e2dd66fd26c25a42c8f0f0e9430b65b431f71928eca8aa91c1c7882ec7ca9d961e

        • C:\Program Files (x86)\PrintFolders\PrintFolders.exe

          Filesize

          5.8MB

          MD5

          32c99c82eac89d46fb0228419b1055ca

          SHA1

          cb26d2383dcfb9cc396605684e5fda77751226e9

          SHA256

          d3552df9ec71a9f00e59b961dcd2570ff5f3d315119abd0b23cbf9b857caa139

          SHA512

          8455306efcecea72d80906a7b4390b95acb6e582e0ba7c04e6338817f84744e2dd66fd26c25a42c8f0f0e9430b65b431f71928eca8aa91c1c7882ec7ca9d961e

        • C:\Users\Admin\AppData\Local\Temp\is-7SGBS.tmp\is-NCIOQ.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-7SGBS.tmp\is-NCIOQ.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-967CT.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\XTBFLJLTJ.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\XTBFLJLTJ.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1032-143-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/1032-153-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/1032-156-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/1032-144-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/1032-145-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/1032-149-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1504-134-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1504-132-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1504-142-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1504-157-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB