Analysis

  • max time kernel
    90s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230621-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/06/2023, 05:49

General

  • Target

    8cf58eb83d5a060190cd796c301ed34b.exe

  • Size

    2.6MB

  • MD5

    8cf58eb83d5a060190cd796c301ed34b

  • SHA1

    9aacc01d979dc768e9de2f31766c1d1f30efd0e0

  • SHA256

    21aae3b5858a7847209d808316c742eee59080d0999ace4c1b7ff4c03c6072f8

  • SHA512

    f4a7329d2bca3402eac6d4fcf44ce01056a7badb8643e2495bd8933f546f83a2caeb02f0c7e3b09fca20a9929e570e969df8590613fc2387965d72a693700615

  • SSDEEP

    49152:tG/qz0PLIfDCRkDNDHdePgbtSNGu7xWCLlz0ZQIACGcd16Fxh:ICz0P8LCGJD92gJSPMCped167h

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\8cf58eb83d5a060190cd796c301ed34b.exe
    "C:\Users\Admin\AppData\Local\Temp\8cf58eb83d5a060190cd796c301ed34b.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1480
    • C:\Users\Admin\AppData\Local\Temp\is-P941U.tmp\is-14P94.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-P941U.tmp\is-14P94.tmp" /SL4 $110054 "C:\Users\Admin\AppData\Local\Temp\8cf58eb83d5a060190cd796c301ed34b.exe" 2348199 593920
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:3928
      • C:\Windows\SysWOW64\net.exe
        "C:\Windows\system32\net.exe" helpmsg 26
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4916
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 helpmsg 26
          4⤵
            PID:3320
        • C:\Program Files (x86)\FreeSpacer626\FreeSpacer626.exe
          "C:\Program Files (x86)\FreeSpacer626\FreeSpacer626.exe"
          3⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2616
          • C:\Users\Admin\AppData\Roaming\{d4949740-1050-11ee-beb7-806e6f6e6963}\TKts2hJHd.exe
            4⤵
            • Executes dropped EXE
            PID:4376
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c taskkill /im "FreeSpacer626.exe" /f & erase "C:\Program Files (x86)\FreeSpacer626\FreeSpacer626.exe" & exit
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:2264
            • C:\Windows\SysWOW64\taskkill.exe
              taskkill /im "FreeSpacer626.exe" /f
              5⤵
              • Kills process with taskkill
              • Suspicious use of AdjustPrivilegeToken
              PID:4996

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Program Files (x86)\FreeSpacer626\FreeSpacer626.exe

            Filesize

            3.5MB

            MD5

            fe1c841380bbb84ac8c088e938e18927

            SHA1

            04efcb0482b7035c1c31f6f209726f10200239b5

            SHA256

            37b710b42007392ffe234f81199f44c3f8edfeb0cbf0963d6b2c53b9e243e06c

            SHA512

            8415a6b7276d477ee5cc133b0d1e03a838bb2e4564e1f5b3a317658d843b38f0031c58d7a53c728f13ee1ea014b6da06a226bcbe9a633e63325314c0f9fc54cb

          • C:\Program Files (x86)\FreeSpacer626\FreeSpacer626.exe

            Filesize

            3.5MB

            MD5

            fe1c841380bbb84ac8c088e938e18927

            SHA1

            04efcb0482b7035c1c31f6f209726f10200239b5

            SHA256

            37b710b42007392ffe234f81199f44c3f8edfeb0cbf0963d6b2c53b9e243e06c

            SHA512

            8415a6b7276d477ee5cc133b0d1e03a838bb2e4564e1f5b3a317658d843b38f0031c58d7a53c728f13ee1ea014b6da06a226bcbe9a633e63325314c0f9fc54cb

          • C:\Program Files (x86)\FreeSpacer626\readme.txt

            Filesize

            4KB

            MD5

            ce494d2d223aed950fea67f657d3fa3e

            SHA1

            97a19c02487c41e3a079cd6764afffeb5e838b26

            SHA256

            c8fa111c5b9537e3b6cab9ba763e164e27fa469f2232b82a54b206a7d892b9e9

            SHA512

            687bf3bd7de28dc45ea622672dc59d7e45d9ce83530a7db6462447ea247a9bde061738c454e09b48531aab9cce802c8491aa730e4da65e63daf31c65ffc39fe1

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\XW4YEBB9\dll[1].htm

            Filesize

            1B

            MD5

            cfcd208495d565ef66e7dff9f98764da

            SHA1

            b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

            SHA256

            5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

            SHA512

            31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

          • C:\Users\Admin\AppData\Local\Temp\is-P941U.tmp\is-14P94.tmp

            Filesize

            1.2MB

            MD5

            25d799a5f8e9b2c0f55a6f1544eea332

            SHA1

            5bb75efea4dc5e878f261daa08abbe23de85bd42

            SHA256

            dd9a41bad124de9e2c50ec4aa7361b2388702d62e97b904afc9c0cbff3608517

            SHA512

            03a5ee8aab70bceecc95dd36b7d867cd11d7adf6ce025b841f6e93f42fd1ddd01fde75f4998c5dfa3450268f03c29bdb02f568409f01484f8f4873f71d928b88

          • C:\Users\Admin\AppData\Local\Temp\is-P941U.tmp\is-14P94.tmp

            Filesize

            1.2MB

            MD5

            25d799a5f8e9b2c0f55a6f1544eea332

            SHA1

            5bb75efea4dc5e878f261daa08abbe23de85bd42

            SHA256

            dd9a41bad124de9e2c50ec4aa7361b2388702d62e97b904afc9c0cbff3608517

            SHA512

            03a5ee8aab70bceecc95dd36b7d867cd11d7adf6ce025b841f6e93f42fd1ddd01fde75f4998c5dfa3450268f03c29bdb02f568409f01484f8f4873f71d928b88

          • C:\Users\Admin\AppData\Local\Temp\is-QP32J.tmp\_isetup\_iscrypt.dll

            Filesize

            2KB

            MD5

            a69559718ab506675e907fe49deb71e9

            SHA1

            bc8f404ffdb1960b50c12ff9413c893b56f2e36f

            SHA256

            2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

            SHA512

            e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

          • C:\Users\Admin\AppData\Roaming\{d4949740-1050-11ee-beb7-806e6f6e6963}\TKts2hJHd.exe

            Filesize

            72KB

            MD5

            3fb36cb0b7172e5298d2992d42984d06

            SHA1

            439827777df4a337cbb9fa4a4640d0d3fa1738b7

            SHA256

            27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

            SHA512

            6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

          • C:\Users\Admin\AppData\Roaming\{d4949740-1050-11ee-beb7-806e6f6e6963}\TKts2hJHd.exe

            Filesize

            72KB

            MD5

            3fb36cb0b7172e5298d2992d42984d06

            SHA1

            439827777df4a337cbb9fa4a4640d0d3fa1738b7

            SHA256

            27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

            SHA512

            6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

          • memory/1480-133-0x0000000000400000-0x0000000000497000-memory.dmp

            Filesize

            604KB

          • memory/1480-338-0x0000000000400000-0x0000000000497000-memory.dmp

            Filesize

            604KB

          • memory/1480-359-0x0000000000400000-0x0000000000497000-memory.dmp

            Filesize

            604KB

          • memory/2616-325-0x0000000000400000-0x0000000001579000-memory.dmp

            Filesize

            17.5MB

          • memory/2616-326-0x0000000000400000-0x0000000001579000-memory.dmp

            Filesize

            17.5MB

          • memory/2616-334-0x0000000010000000-0x000000001001B000-memory.dmp

            Filesize

            108KB

          • memory/2616-341-0x0000000000400000-0x0000000001579000-memory.dmp

            Filesize

            17.5MB

          • memory/2616-357-0x0000000000400000-0x0000000001579000-memory.dmp

            Filesize

            17.5MB

          • memory/3928-339-0x0000000000400000-0x0000000000536000-memory.dmp

            Filesize

            1.2MB

          • memory/3928-148-0x0000000000810000-0x0000000000811000-memory.dmp

            Filesize

            4KB

          • memory/3928-358-0x0000000000400000-0x0000000000536000-memory.dmp

            Filesize

            1.2MB