Analysis

  • max time kernel
    59s
  • max time network
    60s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    11/06/2023, 02:03

General

  • Target
    file.exe
  • Size 1.9MB
  • Sample230611-cgn35aha8x
  • SHA256 477b4c4a0b4a95ad547b7dcbb4285b2d11775d10a31be8a10d1d0e82f55ac40a
  • MD5 SHA1 SHA512 SSDEEP

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.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 10 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 9 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1880
    • C:\Users\Admin\AppData\Local\Temp\is-4KRRH.tmp\is-UVHVK.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-4KRRH.tmp\is-UVHVK.tmp" /SL4 $70126 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1726730 174592
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1312
      • C:\Program Files (x86)\FMFCover\Rec610\Rec610.exe
        "C:\Program Files (x86)\FMFCover\Rec610\Rec610.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1296
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\tPjXRq1X1y.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:568
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "Rec610.exe" /f & erase "C:\Program Files (x86)\FMFCover\Rec610\Rec610.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2008
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "Rec610.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1008

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        Rec610.exe

        • Path C:\Program Files (x86)\FMFCover\Rec610\Rec610.exe
        • Size 1.5MB
        • SHA256 6065713c2b0098de5c1e6063de9dea3c3dc0b658b33f750ab3da0f18e2d4e405
        • MD5 SHA1 SHA512 SSDEEP

        Rec610.exe

        • Path C:\Program Files (x86)\FMFCover\Rec610\Rec610.exe
        • Size 1.5MB
        • SHA256 6065713c2b0098de5c1e6063de9dea3c3dc0b658b33f750ab3da0f18e2d4e405
        • MD5 SHA1 SHA512 SSDEEP

        dll[2].htm

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\QHKTFKHM\dll[2].htm
        • Size 1B
        • SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
        • MD5 SHA1 SHA512

        is-UVHVK.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\is-4KRRH.tmp\is-UVHVK.tmp
        • Size 755KB
        • SHA256 0c8be9231a9c8d125edc1c1779ad2d0549ac27646db70e4483c672d10c6ce948
        • MD5 SHA1 SHA512 SSDEEP

        is-UVHVK.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\is-4KRRH.tmp\is-UVHVK.tmp
        • Size 755KB
        • SHA256 0c8be9231a9c8d125edc1c1779ad2d0549ac27646db70e4483c672d10c6ce948
        • MD5 SHA1 SHA512 SSDEEP

        tPjXRq1X1y.exe

        • Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\tPjXRq1X1y.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        tPjXRq1X1y.exe

        • Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\tPjXRq1X1y.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        Rec610.exe

        • Path \Program Files (x86)\FMFCover\Rec610\Rec610.exe
        • Size 1.5MB
        • SHA256 6065713c2b0098de5c1e6063de9dea3c3dc0b658b33f750ab3da0f18e2d4e405
        • MD5 SHA1 SHA512 SSDEEP

        Rec610.exe

        • Path \Program Files (x86)\FMFCover\Rec610\Rec610.exe
        • Size 1.5MB
        • SHA256 6065713c2b0098de5c1e6063de9dea3c3dc0b658b33f750ab3da0f18e2d4e405
        • MD5 SHA1 SHA512 SSDEEP

        Rec610.exe

        • Path \Program Files (x86)\FMFCover\Rec610\Rec610.exe
        • Size 1.5MB
        • SHA256 6065713c2b0098de5c1e6063de9dea3c3dc0b658b33f750ab3da0f18e2d4e405
        • MD5 SHA1 SHA512 SSDEEP

        is-UVHVK.tmp

        • Path \Users\Admin\AppData\Local\Temp\is-4KRRH.tmp\is-UVHVK.tmp
        • Size 755KB
        • SHA256 0c8be9231a9c8d125edc1c1779ad2d0549ac27646db70e4483c672d10c6ce948
        • MD5 SHA1 SHA512 SSDEEP

        _iscrypt.dll

        • Path \Users\Admin\AppData\Local\Temp\is-I11EU.tmp\_isetup\_iscrypt.dll
        • Size 2KB
        • SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
        • MD5 SHA1 SHA512

        _shfoldr.dll

        • Path \Users\Admin\AppData\Local\Temp\is-I11EU.tmp\_isetup\_shfoldr.dll
        • Size 22KB
        • SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
        • MD5 SHA1 SHA512 SSDEEP

        _shfoldr.dll

        • Path \Users\Admin\AppData\Local\Temp\is-I11EU.tmp\_isetup\_shfoldr.dll
        • Size 22KB
        • SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
        • MD5 SHA1 SHA512 SSDEEP

        tPjXRq1X1y.exe

        • Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\tPjXRq1X1y.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        tPjXRq1X1y.exe

        • Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\tPjXRq1X1y.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        tPjXRq1X1y.exe

        • Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\tPjXRq1X1y.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        memory/1296-97-0x0000000000400000-0x0000000001387000-memory.dmp

        memory/1296-109-0x0000000000400000-0x0000000001387000-memory.dmp

        memory/1296-140-0x0000000000400000-0x0000000001387000-memory.dmp

        memory/1296-98-0x0000000000400000-0x0000000001387000-memory.dmp

        memory/1296-120-0x0000000000400000-0x0000000001387000-memory.dmp

        memory/1296-96-0x00000000019B0000-0x0000000002937000-memory.dmp

        memory/1296-95-0x00000000019B0000-0x0000000002937000-memory.dmp

        memory/1296-114-0x0000000010000000-0x000000001001B000-memory.dmp

        memory/1312-94-0x0000000003C20000-0x0000000004BA7000-memory.dmp

        memory/1312-110-0x0000000003C20000-0x0000000004BA7000-memory.dmp

        memory/1312-87-0x0000000000260000-0x0000000000261000-memory.dmp

        memory/1312-100-0x0000000000400000-0x00000000004CB000-memory.dmp

        memory/1312-141-0x0000000000400000-0x00000000004CB000-memory.dmp

        memory/1880-99-0x0000000000400000-0x0000000000431000-memory.dmp

        memory/1880-54-0x0000000000400000-0x0000000000431000-memory.dmp

        memory/1880-142-0x0000000000400000-0x0000000000431000-memory.dmp