Analysis

  • max time kernel
    101s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/11/2022, 16:46

General

  • Target

    file.exe

  • Size

    2.2MB

  • MD5

    482aba8c8f5e450a3062f1ac28b56c3d

  • SHA1

    603e99c4b18537ce35a795408ee1e14b16926ae9

  • SHA256

    001279e7bbffee58af244a3a87c40f0aaa1b99d235390dabcba4a8b52ccfda7d

  • SHA512

    86d8256beff25593eb8e562130dedd620063c682306bd621191536e832a122b8c25890560017edfe7e2ad1f05258295e2051b3f181750671b3a2ac63f7cfa56c

  • SSDEEP

    49152:q2HCoyO9j+/+8OrQzg3igHq1XVfKXmWaNVkVUxVkBaFwnm:ri/O9k+8Ocz8BH6FKlNUxVkB04m

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 12 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:1540
    • C:\Users\Admin\AppData\Local\Temp\is-VB1U4.tmp\is-4HMO2.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-VB1U4.tmp\is-4HMO2.tmp" /SL4 $B0182 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2080542 318464
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:5116
      • C:\Program Files (x86)\guSearcher\gusearcher85.exe
        "C:\Program Files (x86)\guSearcher\gusearcher85.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1728
        • C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\LWeZZl.exe
          4⤵
          • Executes dropped EXE
          PID:4724
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "gusearcher85.exe" /f & erase "C:\Program Files (x86)\guSearcher\gusearcher85.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1772
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "gusearcher85.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3500

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Program Files (x86)\guSearcher\gusearcher85.exe

          Filesize

          3.0MB

          MD5

          5f39c366be07dc38fd412b60553719c0

          SHA1

          2a022111a933df20577f28b022cc8bb5845127f9

          SHA256

          21ca84e64e5f686553f37d3797fb9773540f8b730eeb1b72ff3705d460b6c994

          SHA512

          df1fd22dad9499c7a07d98051770cb2349ec8fc5195d91f95710e93a1cb909df5cd9c13a5eb6777e177e6faffa50e8b51d1ed0d879c9b0cc8936bd4f22b70e70

        • C:\Program Files (x86)\guSearcher\gusearcher85.exe

          Filesize

          3.0MB

          MD5

          5f39c366be07dc38fd412b60553719c0

          SHA1

          2a022111a933df20577f28b022cc8bb5845127f9

          SHA256

          21ca84e64e5f686553f37d3797fb9773540f8b730eeb1b72ff3705d460b6c994

          SHA512

          df1fd22dad9499c7a07d98051770cb2349ec8fc5195d91f95710e93a1cb909df5cd9c13a5eb6777e177e6faffa50e8b51d1ed0d879c9b0cc8936bd4f22b70e70

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

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-VB1U4.tmp\is-4HMO2.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Local\Temp\is-VB1U4.tmp\is-4HMO2.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\LWeZZl.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\LWeZZl.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1540-132-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/1540-155-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/1540-137-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/1728-143-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1728-142-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1728-147-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1728-151-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1728-154-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB