Analysis

  • max time kernel
    206s
  • max time network
    210s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/12/2022, 21:35

General

  • Target

    4d5da6ebc46c453875ab46dbe3c4936e9ba0f3a8344764cd1177f7413ad49c10.exe

  • Size

    2.1MB

  • MD5

    9803e2a1e01f15af790ec646c16b87b4

  • SHA1

    ff4a9e1086f02da8ce82742987236342506ec99d

  • SHA256

    4d5da6ebc46c453875ab46dbe3c4936e9ba0f3a8344764cd1177f7413ad49c10

  • SHA512

    d5e7122f67179c35396722633c9a2052ef1bfadf38b3aad83e31b05ba4c7ade8d0d22511514661867dd0489f304efbfa62ce8ccc2bf612da898581c761dff0be

  • SSDEEP

    49152:4nqHtlPp2QwI1UIfBeR8tTnId6Dhz85Vcd8DmB8/IFwdBAG5cyE:4nm/2QveIfBemTXhzqVcd8DmB8/ImdBQ

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\4d5da6ebc46c453875ab46dbe3c4936e9ba0f3a8344764cd1177f7413ad49c10.exe
    "C:\Users\Admin\AppData\Local\Temp\4d5da6ebc46c453875ab46dbe3c4936e9ba0f3a8344764cd1177f7413ad49c10.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2096
    • C:\Users\Admin\AppData\Local\Temp\is-BCP2J.tmp\is-4TTML.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-BCP2J.tmp\is-4TTML.tmp" /SL4 $8005E "C:\Users\Admin\AppData\Local\Temp\4d5da6ebc46c453875ab46dbe3c4936e9ba0f3a8344764cd1177f7413ad49c10.exe" 1951747 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:112
      • 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:3856
        • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\lJeme1NDf.exe
          4⤵
          • Executes dropped EXE
          PID:2940

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          3.2MB

          MD5

          f387c0f89764737804df77a8ae83ac7b

          SHA1

          1cef965c09c9b6ae823368059f578e39a73a46c7

          SHA256

          842a6ece836a86379410fc7c8c0d76d00c598fc3f9552b7bb8ef8544c9136cbd

          SHA512

          057779fa0c0cd491e2e01a7d60b1d1519c0f85049b90391293453f5fffeed3d8baa3aebb3f90df853f5b21a2491d14a23f6759ccdcd616359211f79f5ccee17e

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

          Filesize

          3.2MB

          MD5

          f387c0f89764737804df77a8ae83ac7b

          SHA1

          1cef965c09c9b6ae823368059f578e39a73a46c7

          SHA256

          842a6ece836a86379410fc7c8c0d76d00c598fc3f9552b7bb8ef8544c9136cbd

          SHA512

          057779fa0c0cd491e2e01a7d60b1d1519c0f85049b90391293453f5fffeed3d8baa3aebb3f90df853f5b21a2491d14a23f6759ccdcd616359211f79f5ccee17e

        • C:\Users\Admin\AppData\Local\Temp\is-BCP2J.tmp\is-4TTML.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-BCP2J.tmp\is-4TTML.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-M0JLS.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\lJeme1NDf.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\lJeme1NDf.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/2096-139-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/2096-134-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/2096-132-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/3856-143-0x0000000000400000-0x0000000001535000-memory.dmp

          Filesize

          17.2MB

        • memory/3856-146-0x0000000000400000-0x0000000001535000-memory.dmp

          Filesize

          17.2MB

        • memory/3856-145-0x0000000000400000-0x0000000001535000-memory.dmp

          Filesize

          17.2MB

        • memory/3856-144-0x0000000000400000-0x0000000001535000-memory.dmp

          Filesize

          17.2MB

        • memory/3856-150-0x0000000000400000-0x0000000001535000-memory.dmp

          Filesize

          17.2MB