Analysis

  • max time kernel
    156s
  • max time network
    189s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/12/2022, 23:19

General

  • Target

    file.exe

  • Size

    3.4MB

  • MD5

    6ff0800fc7a3a244f03fdbc9c60e36df

  • SHA1

    b24005b3c7690c038d2b0dda1bdde90c26f7dde8

  • SHA256

    1f0588ba5ba5818bf3f637f9d8397f829caa022fdc4eba73bb99b21a7b4cb110

  • SHA512

    effce8e61a073d75bde46d7ed2a3e4a49bb3e5085e98c98ca79f75c8fe0565c34817cdb13c0945b3042c860dd256c81ac730aaf9683596fe0ffb48304186bf8a

  • SSDEEP

    98304:4fDBNB1iiWDfaWH9aBBXb/Edkd+y5a7gUCqnj2MvrXXcyk:QDLB1gDyWH9ctbTEYa7gURjvvrXXcyk

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 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:876
    • C:\Users\Admin\AppData\Local\Temp\is-ELB60.tmp\is-K7DSE.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-ELB60.tmp\is-K7DSE.tmp" /SL4 $30060 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3343168 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:3836
      • 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:908
        • C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\676W3CL.exe
          4⤵
          • Executes dropped EXE
          PID:5004
        • 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:2496
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "PrintFolders.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3608

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          5.7MB

          MD5

          10c5cd400a248e684849819520b65fcb

          SHA1

          4127a2bacfd03afff2b2f85f7f1cccfbe0577734

          SHA256

          5805926735134b68688a78f99d347922db46ed75370f36606d4f479cbc93fb9b

          SHA512

          362ae59bae1c84dd909b341d5bc0e79f22c047f23eaeaf2ed34fbeb13eb4a672e5aef53c870f5501c25a5ac793db71c4251b48308ee62284518d38383733b589

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

          Filesize

          5.7MB

          MD5

          10c5cd400a248e684849819520b65fcb

          SHA1

          4127a2bacfd03afff2b2f85f7f1cccfbe0577734

          SHA256

          5805926735134b68688a78f99d347922db46ed75370f36606d4f479cbc93fb9b

          SHA512

          362ae59bae1c84dd909b341d5bc0e79f22c047f23eaeaf2ed34fbeb13eb4a672e5aef53c870f5501c25a5ac793db71c4251b48308ee62284518d38383733b589

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

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-ELB60.tmp\is-K7DSE.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-ELB60.tmp\is-K7DSE.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\676W3CL.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\676W3CL.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/876-132-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/876-155-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/876-137-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/908-143-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/908-142-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/908-147-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/908-148-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/908-154-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB