Analysis

  • max time kernel
    150s
  • max time network
    169s
  • 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, 06:48

General

  • Target

    file.exe

  • Size

    3.4MB

  • MD5

    ce6a6db5f1fa6dd84a6d924d7c56d843

  • SHA1

    198d5eca34e902617635ac01a6f8efe7b874881b

  • SHA256

    d6cca5ac8587159d1a92848e65baf197a1dcdfaa7c2a8d955042d632af737692

  • SHA512

    ef4bbd3a20d932398adcb08b93251c6137944d349e22e237a80125b89d8aa1f8aef0ebf32494dfdb8dd3602ee07e07ebbc91c0e49d5057c4dcc7786e4d94185f

  • SSDEEP

    49152:o4UbbEPSOucMflyPFaU5NNyy2h1y5haKWwhynekiC2I58qBcIwMcAo5YNrc2gwDO:oxEaOLMNyPvT90QaMdbsrcYDXcyS

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:1192
    • C:\Users\Admin\AppData\Local\Temp\is-NRJ8E.tmp\is-RFLQI.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-NRJ8E.tmp\is-RFLQI.tmp" /SL4 $40060 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3379951 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:2628
      • 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:508
        • C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\c3JC0on43S.exe
          4⤵
          • Executes dropped EXE
          PID:1980
        • 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:3172
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "PrintFolders.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3140

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          5.8MB

          MD5

          f1828992ad010b3808429838fb1ceb30

          SHA1

          20c754d9c6923292468f8dfbcfcf7f9366c80dd1

          SHA256

          0586190fe5ca665e4b932c6c1557bc7cc9993bcada6be27023004babb8f611ff

          SHA512

          3c3081a6138f6cd3e17fbbbd4c6cf71e5feb5021ecdd532f094e4c47d511050f225c07be4e299d9968430f7ecf24c1c43564f3f0be06e65407dd46acf7b96b63

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

          Filesize

          5.8MB

          MD5

          f1828992ad010b3808429838fb1ceb30

          SHA1

          20c754d9c6923292468f8dfbcfcf7f9366c80dd1

          SHA256

          0586190fe5ca665e4b932c6c1557bc7cc9993bcada6be27023004babb8f611ff

          SHA512

          3c3081a6138f6cd3e17fbbbd4c6cf71e5feb5021ecdd532f094e4c47d511050f225c07be4e299d9968430f7ecf24c1c43564f3f0be06e65407dd46acf7b96b63

        • C:\Users\Admin\AppData\Local\Temp\is-MSF9B.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-NRJ8E.tmp\is-RFLQI.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-NRJ8E.tmp\is-RFLQI.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\c3JC0on43S.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\c3JC0on43S.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/508-143-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/508-142-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/508-155-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/508-144-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/508-152-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/508-148-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1192-134-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1192-132-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1192-156-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB