Analysis

  • max time kernel
    92s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/12/2022, 22:01

General

  • Target

    file.exe

  • Size

    3.4MB

  • MD5

    172244c254ce8b089f3b4a6053edbae4

  • SHA1

    1d83031e726d6c904f1fbca28aadb1baf7ea9886

  • SHA256

    ed1d1c08546a03aea04af1f0ae5a67cc1d5f0fe7a3c9fd41345f4335070c458a

  • SHA512

    7d3b3aa4b13687f2b19e4e231e68985b1f77d5629724b5a4d26845da2cb718d0eaf919d45ccda03dd3b1d799c116a4fee87286d9f5a8a2c3e3de56e43872e2e3

  • SSDEEP

    98304:AEym7QrK5R3rLi33D1iA0J8ENv4r8jHv6KE7zDgfsvgXcyC:4EjrLSTITRDjHvBEh4XcyC

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:1400
    • C:\Users\Admin\AppData\Local\Temp\is-16OSG.tmp\is-R0HKC.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-16OSG.tmp\is-R0HKC.tmp" /SL4 $1C0022 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3379009 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1944
      • 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:1164
        • C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\cK2943XyrkieF.exe
          4⤵
          • Executes dropped EXE
          PID:3196
        • 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:3988
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "PrintFolders.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:4168

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          5.7MB

          MD5

          f54b5a9b9ff3bcfaa46e6280ef35a273

          SHA1

          985db004cb4e38b48479cffa3a4a6d375181ae67

          SHA256

          f4b2f604c480129e193a78bac3e1e0ae6424724e9805548f0a2bdde400319c06

          SHA512

          42a1be7a5e18456f8b52f6e767d8acb897d7bb288c03110181fdab84c7539dce78f07d58ac57149c97d8d74058bedb02ab9908ae146d6651db1b62f81ee51f76

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

          Filesize

          5.7MB

          MD5

          f54b5a9b9ff3bcfaa46e6280ef35a273

          SHA1

          985db004cb4e38b48479cffa3a4a6d375181ae67

          SHA256

          f4b2f604c480129e193a78bac3e1e0ae6424724e9805548f0a2bdde400319c06

          SHA512

          42a1be7a5e18456f8b52f6e767d8acb897d7bb288c03110181fdab84c7539dce78f07d58ac57149c97d8d74058bedb02ab9908ae146d6651db1b62f81ee51f76

        • C:\Users\Admin\AppData\Local\Temp\is-16OSG.tmp\is-R0HKC.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-16OSG.tmp\is-R0HKC.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-PJ53C.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\cK2943XyrkieF.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\cK2943XyrkieF.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1164-143-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/1164-153-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/1164-156-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/1164-144-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/1164-145-0x0000000000400000-0x00000000017BD000-memory.dmp

          Filesize

          19.7MB

        • memory/1164-149-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1400-132-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1400-134-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1400-139-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1400-157-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB