Analysis

  • max time kernel
    139s
  • max time network
    148s
  • 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, 00:46

General

  • Target

    file.exe

  • Size

    3.5MB

  • MD5

    4707406064875820b8e29b8fe679052b

  • SHA1

    7afad44e762cfa79e27c960569e020218d5f30d1

  • SHA256

    5db9ccb6af28ae7d4ac38d4123c7e10476817444abab6013247f86da99c49f59

  • SHA512

    58e1d1409def6247abe05d30f7d57430ef935cea545c47070af0cdc1874d34dbafb3998d4877df57f26a71bb4c156c06fbfb386e2a0fda5999409cfd90927b65

  • SSDEEP

    98304:wREp/Buc1/CwcD4BwuAMzBC8xFxPnv9Xcyl:wEu9BDawdMlXxjPnv9Xcyl

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:1912
    • C:\Users\Admin\AppData\Local\Temp\is-1SC92.tmp\is-8JPBH.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-1SC92.tmp\is-8JPBH.tmp" /SL4 $F01DC "C:\Users\Admin\AppData\Local\Temp\file.exe" 3391930 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:4568
      • 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:4364
        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\fpGAWjKTmNWiTH.exe
          4⤵
          • Executes dropped EXE
          PID:4964
        • 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:3356
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "PrintFolders.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3224

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

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

          Filesize

          5.7MB

          MD5

          10231200d09413e190e3a5485b045915

          SHA1

          769a4cb199bfa5d8806e111ded29a15de9c88b5f

          SHA256

          e2160396e2605676c4f11309ae5a70c41b5dadf16076f90558c95a81a1670790

          SHA512

          135bf7d92ba579a094c77ad9c3419b55de7bedbde7f913bc970e48415cbf4295bece0bb192df4fe6f3737cb94246794e6be1f48956f31b537841d182e42f6f4a

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

          Filesize

          5.7MB

          MD5

          10231200d09413e190e3a5485b045915

          SHA1

          769a4cb199bfa5d8806e111ded29a15de9c88b5f

          SHA256

          e2160396e2605676c4f11309ae5a70c41b5dadf16076f90558c95a81a1670790

          SHA512

          135bf7d92ba579a094c77ad9c3419b55de7bedbde7f913bc970e48415cbf4295bece0bb192df4fe6f3737cb94246794e6be1f48956f31b537841d182e42f6f4a

        • C:\Users\Admin\AppData\Local\Temp\is-1SC92.tmp\is-8JPBH.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-1SC92.tmp\is-8JPBH.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-QAO7I.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1912-134-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1912-157-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1912-132-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/4364-149-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/4364-145-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/4364-144-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/4364-150-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/4364-143-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/4364-142-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/4364-156-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB