Analysis

  • max time kernel
    145s
  • max time network
    127s
  • 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, 18:48

General

  • Target

    file.exe

  • Size

    2.2MB

  • MD5

    f1b4b5cb154d5f463c0ef1076c405319

  • SHA1

    493a432a07537b4a4348320a4f75f50aee7727ba

  • SHA256

    ec96cd51c61b92da5164b561a0452bc4eb55670d5a4899d614e41bdd7413ae60

  • SHA512

    26a70fb17d176200aa03767f5a55d2498d444c424608e2c9507c14a207d8fd263d36b74159820228e37bed322eaef32e898d5acde7fd28ce752751319f129e61

  • SSDEEP

    49152:q2RMD1ICUAsklC9pUZFU6MVz/frtaVfggYdtqUv7UxVkBaFwnm:rwLUAscCQXbmBaJgh7bUxVkB04m

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:2288
    • C:\Users\Admin\AppData\Local\Temp\is-P48QV.tmp\is-LEVFV.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-P48QV.tmp\is-LEVFV.tmp" /SL4 $701DA "C:\Users\Admin\AppData\Local\Temp\file.exe" 2072366 318464
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:4880
      • 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:4524
        • C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\i99r3xe.exe
          4⤵
          • Executes dropped EXE
          PID:4052
        • 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:3248
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "gusearcher85.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:2360

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

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

          Filesize

          3.0MB

          MD5

          f7b7453aeeda424568ca169cf33adb5c

          SHA1

          fdaff6fbde28e1cd842a1a4d62e929f6320f6eb5

          SHA256

          8b35d1536d0eaefb5ca9a05503b58875860fdb2634c4cddb1247aff58fd1c53e

          SHA512

          fa212edab5bf789466bf87092c0f5cef3868eea6510ead6ed078da708e3a69f6cff2762440997e11ca0efe8e088d71e8b9a95ba08210719c3c9863f1b57ee080

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

          Filesize

          3.0MB

          MD5

          f7b7453aeeda424568ca169cf33adb5c

          SHA1

          fdaff6fbde28e1cd842a1a4d62e929f6320f6eb5

          SHA256

          8b35d1536d0eaefb5ca9a05503b58875860fdb2634c4cddb1247aff58fd1c53e

          SHA512

          fa212edab5bf789466bf87092c0f5cef3868eea6510ead6ed078da708e3a69f6cff2762440997e11ca0efe8e088d71e8b9a95ba08210719c3c9863f1b57ee080

        • C:\Users\Admin\AppData\Local\Temp\is-0O5CU.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-P48QV.tmp\is-LEVFV.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Local\Temp\is-P48QV.tmp\is-LEVFV.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\i99r3xe.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\i99r3xe.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/2288-132-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/2288-156-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/2288-138-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/4524-143-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/4524-144-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/4524-148-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/4524-152-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/4524-142-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/4524-155-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB