Analysis

  • max time kernel
    185s
  • max time network
    190s
  • 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, 00:16

General

  • Target

    file.exe

  • Size

    3.5MB

  • MD5

    83ebb9dafd933d689e90c8af157c1661

  • SHA1

    2d665a7b2fa5f631555766686d56d8b898c06376

  • SHA256

    ab39202250d53c2ea0b0a3768a25fbc016f9e2401ac90ce908084d91b40b6bab

  • SHA512

    1428bd56084df9ccb08930f8b372297146e448b9ce3d88a1b4eccd44b4c54cf62aacfa6efc13eda4186f42e76b8d2d41e5a39a8209eb44be2279ca9000ea8b92

  • SSDEEP

    98304:4gA8FOu/W9mLnN/sdyJq0H2mOEhmNKWmS+STUCXcyO:lA8Iu/wmLs30HxOJN9mdkUCXcyO

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
  • 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.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3280
    • C:\Users\Admin\AppData\Local\Temp\is-9KMPM.tmp\is-274Q2.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-9KMPM.tmp\is-274Q2.tmp" /SL4 $80032 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3385910 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:3428
      • C:\Program Files (x86)\PrintFolders\PrintFolders.exe
        "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of WriteProcessMemory
        PID:1216
        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\OWh99.exe
          4⤵
          • Executes dropped EXE
          PID:4276

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          5.7MB

          MD5

          44588573a14b6fc236afb180bbb06c49

          SHA1

          e01f70dbedce9f5b778d9eabb4da002c618a6051

          SHA256

          601005a1d7710fb5f62402102423cebf364bf920674c6521363cf0a00a1cec81

          SHA512

          1f6f145ae69162acd4057410914a197247afb4a1bd67b5633915e43f10f93c294fb81e1497d169096a3c089ef4291add5d11f887a3805b48d2c81fceb56c876e

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

          Filesize

          5.7MB

          MD5

          44588573a14b6fc236afb180bbb06c49

          SHA1

          e01f70dbedce9f5b778d9eabb4da002c618a6051

          SHA256

          601005a1d7710fb5f62402102423cebf364bf920674c6521363cf0a00a1cec81

          SHA512

          1f6f145ae69162acd4057410914a197247afb4a1bd67b5633915e43f10f93c294fb81e1497d169096a3c089ef4291add5d11f887a3805b48d2c81fceb56c876e

        • C:\Users\Admin\AppData\Local\Temp\is-9KMPM.tmp\is-274Q2.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-9KMPM.tmp\is-274Q2.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-L24SN.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\OWh99.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\OWh99.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1216-142-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/1216-143-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/1216-147-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/1216-148-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/3280-137-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/3280-132-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB