Analysis

  • max time kernel
    75s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230621-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/07/2023, 04:52

General

  • Target

    file.exe

  • Size

    1.1MB

  • MD5

    10f02ac67d619ef4ed2b5cbe14e556db

  • SHA1

    125b59e8cba7dfd2095cda60c63a23def7360943

  • SHA256

    f42012d42d1efb0ce9a28eac63f9512ad4d873cf22d1148c71ce4230ad26abe2

  • SHA512

    6fbe78b7321047166ec4a8ed189154b198b23acd72b03915d26f5978479fd484a9f56354569644388381949fedaeadbcc794d25458b91eeae9b7d440ee52946d

  • SSDEEP

    24576:JfOyxyU3MB2dpS2WWy8vWwGQfOI2huiQhWX+5GLEl/nNUWCMW6:JGAyUe2drTwQ2r8GXQ/VvT

Malware Config

Extracted

Family

gcleaner

C2

45.12.253.56

45.12.253.72

45.12.253.98

45.12.253.75

Signatures

  • GCleaner

    GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Kills process with taskkill 1 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2800
    • C:\Users\Admin\AppData\Local\Temp\is-EU836.tmp\is-CFUGQ.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-EU836.tmp\is-CFUGQ.tmp" /SL4 $90048 "C:\Users\Admin\AppData\Local\Temp\file.exe" 922350 73728
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:4352
      • C:\Windows\SysWOW64\net.exe
        "C:\Windows\system32\net.exe" helpmsg 2
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3092
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 helpmsg 2
          4⤵
            PID:3428
        • C:\Program Files (x86)\RejSpacer72\RejSpacer72.exe
          "C:\Program Files (x86)\RejSpacer72\RejSpacer72.exe"
          3⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4720
          • C:\Users\Admin\AppData\Roaming\{f4724154-103f-11ee-9fa7-806e6f6e6963}\UBZW0.exe
            4⤵
            • Executes dropped EXE
            PID:4964
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c taskkill /im "RejSpacer72.exe" /f & erase "C:\Program Files (x86)\RejSpacer72\RejSpacer72.exe" & exit
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:732
            • C:\Windows\SysWOW64\taskkill.exe
              taskkill /im "RejSpacer72.exe" /f
              5⤵
              • Kills process with taskkill
              • Suspicious use of AdjustPrivilegeToken
              PID:4236

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Program Files (x86)\RejSpacer72\RejSpacer72.exe

            Filesize

            1.1MB

            MD5

            8dddbb2925650c158676cf0b29ce6d10

            SHA1

            af8296ae35f58265a2852240a804e0ed9a661c9a

            SHA256

            106220886bf4198d697c2fb507771ded2ed503c97e6a5d15c176771d9d022f17

            SHA512

            6604dd4c1a2e1e113d0946c705892de4067ca8632a1f6e28e975675521388ed8a5e800a509923b9807d9e8608021b0fd3a9211e9a4b5ba8c37d7008ab74c15f6

          • C:\Program Files (x86)\RejSpacer72\RejSpacer72.exe

            Filesize

            1.1MB

            MD5

            8dddbb2925650c158676cf0b29ce6d10

            SHA1

            af8296ae35f58265a2852240a804e0ed9a661c9a

            SHA256

            106220886bf4198d697c2fb507771ded2ed503c97e6a5d15c176771d9d022f17

            SHA512

            6604dd4c1a2e1e113d0946c705892de4067ca8632a1f6e28e975675521388ed8a5e800a509923b9807d9e8608021b0fd3a9211e9a4b5ba8c37d7008ab74c15f6

          • C:\Program Files (x86)\RejSpacer72\readme.txt

            Filesize

            4KB

            MD5

            ce494d2d223aed950fea67f657d3fa3e

            SHA1

            97a19c02487c41e3a079cd6764afffeb5e838b26

            SHA256

            c8fa111c5b9537e3b6cab9ba763e164e27fa469f2232b82a54b206a7d892b9e9

            SHA512

            687bf3bd7de28dc45ea622672dc59d7e45d9ce83530a7db6462447ea247a9bde061738c454e09b48531aab9cce802c8491aa730e4da65e63daf31c65ffc39fe1

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\G63C5RNT\dll[1].htm

            Filesize

            1B

            MD5

            cfcd208495d565ef66e7dff9f98764da

            SHA1

            b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

            SHA256

            5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

            SHA512

            31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

          • C:\Users\Admin\AppData\Local\Temp\is-EU836.tmp\is-CFUGQ.tmp

            Filesize

            664KB

            MD5

            ce35b2dad10a0e6d5e016772efb75ad2

            SHA1

            ac38173e753c499655ba566493e3c3ff71878d92

            SHA256

            31f933169e44b127e3f0a80077a088ed208c2504773a084bfca4de2f53b839c6

            SHA512

            cdd97e8bbf568e9d6d6708bb427f3ce9d5433d320cd577e1e7bab1154c224efbb3960a24980ceec3e2bf471c72caf2309b13e7075c3216f6d43072d277a6642c

          • C:\Users\Admin\AppData\Local\Temp\is-EU836.tmp\is-CFUGQ.tmp

            Filesize

            664KB

            MD5

            ce35b2dad10a0e6d5e016772efb75ad2

            SHA1

            ac38173e753c499655ba566493e3c3ff71878d92

            SHA256

            31f933169e44b127e3f0a80077a088ed208c2504773a084bfca4de2f53b839c6

            SHA512

            cdd97e8bbf568e9d6d6708bb427f3ce9d5433d320cd577e1e7bab1154c224efbb3960a24980ceec3e2bf471c72caf2309b13e7075c3216f6d43072d277a6642c

          • C:\Users\Admin\AppData\Local\Temp\is-O9SLI.tmp\_isetup\_iscrypt.dll

            Filesize

            2KB

            MD5

            a69559718ab506675e907fe49deb71e9

            SHA1

            bc8f404ffdb1960b50c12ff9413c893b56f2e36f

            SHA256

            2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

            SHA512

            e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

          • C:\Users\Admin\AppData\Roaming\{f4724154-103f-11ee-9fa7-806e6f6e6963}\UBZW0.exe

            Filesize

            72KB

            MD5

            3fb36cb0b7172e5298d2992d42984d06

            SHA1

            439827777df4a337cbb9fa4a4640d0d3fa1738b7

            SHA256

            27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

            SHA512

            6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

          • C:\Users\Admin\AppData\Roaming\{f4724154-103f-11ee-9fa7-806e6f6e6963}\UBZW0.exe

            Filesize

            72KB

            MD5

            3fb36cb0b7172e5298d2992d42984d06

            SHA1

            439827777df4a337cbb9fa4a4640d0d3fa1738b7

            SHA256

            27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

            SHA512

            6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

          • memory/2800-337-0x0000000000400000-0x0000000000418000-memory.dmp

            Filesize

            96KB

          • memory/2800-133-0x0000000000400000-0x0000000000418000-memory.dmp

            Filesize

            96KB

          • memory/2800-357-0x0000000000400000-0x0000000000418000-memory.dmp

            Filesize

            96KB

          • memory/4352-148-0x0000000000680000-0x0000000000681000-memory.dmp

            Filesize

            4KB

          • memory/4352-338-0x0000000000400000-0x00000000004B5000-memory.dmp

            Filesize

            724KB

          • memory/4352-356-0x0000000000400000-0x00000000004B5000-memory.dmp

            Filesize

            724KB

          • memory/4720-340-0x0000000000400000-0x0000000001318000-memory.dmp

            Filesize

            15.1MB

          • memory/4720-332-0x0000000010000000-0x000000001001B000-memory.dmp

            Filesize

            108KB

          • memory/4720-355-0x0000000000400000-0x0000000001318000-memory.dmp

            Filesize

            15.1MB

          • memory/4720-324-0x0000000000400000-0x0000000001318000-memory.dmp

            Filesize

            15.1MB