Analysis

  • max time kernel
    91s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/11/2022, 19:31

General

  • Target

    file.exe

  • Size

    2.4MB

  • MD5

    1a8784c9b0d8e72284205a3874ec73c2

  • SHA1

    90e27e17355375165ac6c803e43e55b13e172138

  • SHA256

    b52c7abbbb2024dcada78ac87aecd50b588ac787248e0ccd5715d3da7da187ac

  • SHA512

    0c364652fb0f3e585b7d78a182eaada30803bc46c362c9c878503afea39311dd64a0dbddf12a568df2b3a67a80812f604e7fce103a838061b870560c6aef0e8d

  • SSDEEP

    49152:q2wDCjFJlx0WQgAvas06f/DhlJY/gij50Dr8Cuwxy7LoUxVkBaFwnm:rwDCpJleWQgs1f/D3GgYJCTxyHoUxVkq

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:4968
    • C:\Users\Admin\AppData\Local\Temp\is-KG5TU.tmp\is-27LJT.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-KG5TU.tmp\is-27LJT.tmp" /SL4 $901CE "C:\Users\Admin\AppData\Local\Temp\file.exe" 2235783 318464
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:532
      • 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:4512
        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\fk9Ms22eE8.exe
          4⤵
          • Executes dropped EXE
          PID:664
        • 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:3520
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "gusearcher85.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3912

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          3.2MB

          MD5

          f030f235b3a8097fa564e8b322619af8

          SHA1

          f00c225bbc073159f27c58217b87debcbab5e5a8

          SHA256

          fdaab2629023aec5939012160493afe4b4279e693bd1722c0cf8fa42481d4c24

          SHA512

          d6ea4d0eb81a4949489a86a9dd637ce47145e79c9e6513e8506aa7dceaa96a9fea1305bd065cfa8fccd65390cfa1cdbb6028a27ad8c840eea4fa4ec090bdb060

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

          Filesize

          3.2MB

          MD5

          f030f235b3a8097fa564e8b322619af8

          SHA1

          f00c225bbc073159f27c58217b87debcbab5e5a8

          SHA256

          fdaab2629023aec5939012160493afe4b4279e693bd1722c0cf8fa42481d4c24

          SHA512

          d6ea4d0eb81a4949489a86a9dd637ce47145e79c9e6513e8506aa7dceaa96a9fea1305bd065cfa8fccd65390cfa1cdbb6028a27ad8c840eea4fa4ec090bdb060

        • C:\Users\Admin\AppData\Local\Temp\is-C66JU.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-KG5TU.tmp\is-27LJT.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Local\Temp\is-KG5TU.tmp\is-27LJT.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\fk9Ms22eE8.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\fk9Ms22eE8.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/4512-143-0x0000000000400000-0x000000000152B000-memory.dmp

          Filesize

          17.2MB

        • memory/4512-142-0x0000000000400000-0x000000000152B000-memory.dmp

          Filesize

          17.2MB

        • memory/4512-147-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/4512-152-0x0000000000400000-0x000000000152B000-memory.dmp

          Filesize

          17.2MB

        • memory/4512-155-0x0000000000400000-0x000000000152B000-memory.dmp

          Filesize

          17.2MB

        • memory/4968-132-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/4968-151-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/4968-134-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/4968-156-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB