Analysis

  • max time kernel
    167s
  • max time network
    186s
  • 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, 04:02

General

  • Target

    file.exe

  • Size

    3.4MB

  • MD5

    c49a576495040b18d27862da45f5000a

  • SHA1

    f26b1c69d80b87d77b0bbca2e36217f4dbb2f877

  • SHA256

    316a5510faefd6e239e568c4939dad3f229bcc1aa91fbd39076f6014f4cbcea8

  • SHA512

    b00fc6efab9823eae7bec7c676a5d05265fd7a0af4bd743708e8a74d391684ae4f7aacd9357d360e46bae686dfbcfc4562af3b2de8f11461bbcd30eae41f0b01

  • SSDEEP

    98304:IZCuoFGuHONeWPYN4Bdv91wi+2dnY6UScWGIV062jOSIXcyQ:kCuopuNeWY8F1wDooSc1Iq62jOvXcyQ

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:728
    • C:\Users\Admin\AppData\Local\Temp\is-9VO7O.tmp\is-8TRTG.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-9VO7O.tmp\is-8TRTG.tmp" /SL4 $8005A "C:\Users\Admin\AppData\Local\Temp\file.exe" 3367985 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:3904
      • 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:5096
        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IL4Bwy7.exe
          4⤵
          • Executes dropped EXE
          PID:5052

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          5.8MB

          MD5

          a07392b552114f6a6751e2263af7d3e4

          SHA1

          89397318bfc85f6d4f0e74ae2e54ff4ea798d6c7

          SHA256

          53209af830e53207e79196cd35c7fb75d6728cba09df12f1d081c3615d1196c4

          SHA512

          10f2345d0ebafde22b2b69686efcb135178bef872f51f59f98afa22d2de783ede8397ca8d8523d1e0994bcd9636ffcbe12a21b3f2c2352c525a873ac15027885

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

          Filesize

          5.8MB

          MD5

          a07392b552114f6a6751e2263af7d3e4

          SHA1

          89397318bfc85f6d4f0e74ae2e54ff4ea798d6c7

          SHA256

          53209af830e53207e79196cd35c7fb75d6728cba09df12f1d081c3615d1196c4

          SHA512

          10f2345d0ebafde22b2b69686efcb135178bef872f51f59f98afa22d2de783ede8397ca8d8523d1e0994bcd9636ffcbe12a21b3f2c2352c525a873ac15027885

        • C:\Users\Admin\AppData\Local\Temp\is-3DGU6.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-9VO7O.tmp\is-8TRTG.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-9VO7O.tmp\is-8TRTG.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IL4Bwy7.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IL4Bwy7.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/728-137-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/728-132-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/5096-142-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/5096-143-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/5096-147-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/5096-148-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB