Analysis

  • max time kernel
    185s
  • max time network
    194s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/12/2022, 21:32

General

  • Target

    file.exe

  • Size

    3.4MB

  • MD5

    3c4f62e575eee7954b28d9195a1867b4

  • SHA1

    74fe05ba5b7767e2df691cd5d8a8528cc860e724

  • SHA256

    8e4d60fbedd0fda50ffe79d2ad1831790d0258d2d421acb942100e40d2ae0253

  • SHA512

    ed52afab1bde2fb7f4a59578e1a35ce56ad69a36cddb7c9eaad78a7aa1f9da563037252c507da711398e06e0bf6736401a833bc2b0f2a25c7bd2d4f7cefedd3f

  • SSDEEP

    98304:IX3/na2FU1sDpkVZwEUtBmuJsWTftRozfJ2PAEqSldBv/yFXcy5:4fDcsDuwqRdU9qikFXcy5

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 behavior: GetForegroundWindowSpam 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:1260
    • C:\Users\Admin\AppData\Local\Temp\is-EH8UP.tmp\is-5R3S5.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-EH8UP.tmp\is-5R3S5.tmp" /SL4 $B006A "C:\Users\Admin\AppData\Local\Temp\file.exe" 3357242 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1508
      • 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 behavior: GetForegroundWindowSpam
        • Suspicious use of WriteProcessMemory
        PID:2172
        • C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\YPCYJgx.exe
          4⤵
          • Executes dropped EXE
          PID:2072
        • 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:3844
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "PrintFolders.exe" /f
            5⤵
            • Kills process with taskkill
            PID:3724

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          5.7MB

          MD5

          ecceb829154188a97f9625df68cfc8d0

          SHA1

          adb21f5449a8d71afb255210c5d6667eb7a1b7ef

          SHA256

          91771072ff61e5506b51f936e7889eb75be62dc9fe0df56f7d33b458084108cf

          SHA512

          70d7065686e80e97260b35d318c6a67661fd84aa7bddc7d8d73c20253b8d0ab92ae393030dbcb6f7cc87ba6151164004da8ccdb439e7a42cf9595f6c9d32956b

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

          Filesize

          5.7MB

          MD5

          ecceb829154188a97f9625df68cfc8d0

          SHA1

          adb21f5449a8d71afb255210c5d6667eb7a1b7ef

          SHA256

          91771072ff61e5506b51f936e7889eb75be62dc9fe0df56f7d33b458084108cf

          SHA512

          70d7065686e80e97260b35d318c6a67661fd84aa7bddc7d8d73c20253b8d0ab92ae393030dbcb6f7cc87ba6151164004da8ccdb439e7a42cf9595f6c9d32956b

        • C:\Users\Admin\AppData\Local\Temp\is-EH8UP.tmp\is-5R3S5.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-EH8UP.tmp\is-5R3S5.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-KLU0D.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\YPCYJgx.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\YPCYJgx.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1260-137-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1260-132-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/2172-143-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/2172-145-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/2172-144-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/2172-142-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/2172-149-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/2172-155-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB