Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    10/02/2024, 04:35

General

  • Target
    024a74276c5ddcc6aff89d508f3bda43.exe
  • Size 4.1MB
  • Sample240210-e7nw6aaf78
  • SHA256 55dfea3ff8cf6fd2c133dc53b415c12b8e5921951776d559b6fbde136924141d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Glupteba

    Glupteba is a modular loader written in Golang with various components.

  • Glupteba payload 23 IoCs
  • Windows security bypass 2 TTPs 7 IoCs
  • Modifies boot configuration data using bcdedit 14 IoCs
  • Drops file in Drivers directory 1 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Possible attempt to disable PatchGuard 2 TTPs

    Rootkits can use kernel patching to embed themselves in an operating system.

  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 13 IoCs
  • UPX packed file 7 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Windows security modification 2 TTPs 7 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Manipulates WinMon driver. 1 IoCs

    Roottkits write to WinMon to hide PIDs from being detected.

  • Manipulates WinMonFS driver. 1 IoCs

    Roottkits write to WinMonFS to hide directories/files from being detected.

  • Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

    Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

  • Drops file in Windows directory 5 IoCs
  • Launches sc.exe 1 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies system certificate store 2 TTPs 11 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\024a74276c5ddcc6aff89d508f3bda43.exe
    "C:\Users\Admin\AppData\Local\Temp\024a74276c5ddcc6aff89d508f3bda43.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:2348
    • C:\Users\Admin\AppData\Local\Temp\024a74276c5ddcc6aff89d508f3bda43.exe
      "C:\Users\Admin\AppData\Local\Temp\024a74276c5ddcc6aff89d508f3bda43.exe"
      2⤵
      • Windows security bypass
      • Loads dropped DLL
      • Windows security modification
      • Adds Run key to start application
      • Checks for VirtualBox DLLs, possible anti-VM trick
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1940
      • C:\Windows\system32\cmd.exe
        C:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2228
        • C:\Windows\system32\netsh.exe
          netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
          4⤵
          • Modifies Windows Firewall
          • Modifies data under HKEY_USERS
          PID:2656
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe
        3⤵
        • Drops file in Drivers directory
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Manipulates WinMon driver.
        • Manipulates WinMonFS driver.
        • Drops file in Windows directory
        • Modifies data under HKEY_USERS
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2892
        • C:\Windows\system32\schtasks.exe
          schtasks /delete /tn ScheduledUpdate /f
          4⤵
            PID:2620
          • C:\Windows\system32\schtasks.exe
            schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
            4⤵
            • Creates scheduled task(s)
            PID:588
          • C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe
            "C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe"
            4⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Modifies system certificate store
            • Suspicious use of WriteProcessMemory
            PID:1192
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -create {71A3C7FC-F751-4982-AEC1-E958357E6813} -d "Windows Fast Mode" -application OSLOADER
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1720
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} device partition=C:
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1104
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} osdevice partition=C:
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1112
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} systemroot \Windows
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1628
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} path \Windows\system32\osloader.exe
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:2520
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} kernel ntkrnlmp.exe
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:2328
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} recoveryenabled 0
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:2944
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} nx OptIn
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1808
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} nointegritychecks 1
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:896
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} inherit {bootloadersettings}
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1344
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -displayorder {71A3C7FC-F751-4982-AEC1-E958357E6813} -addlast
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1944
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -timeout 0
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1588
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -default {71A3C7FC-F751-4982-AEC1-E958357E6813}
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:832
          • C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
            C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe taskmgr.exe C:\Users\Admin\AppData\Local\Temp\csrss\injector\NtQuerySystemInformationHook.dll
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            PID:328
          • C:\Windows\system32\bcdedit.exe
            C:\Windows\Sysnative\bcdedit.exe /v
            4⤵
            • Modifies boot configuration data using bcdedit
            PID:2768
          • C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
            C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
            4⤵
            • Executes dropped EXE
            PID:2696
          • C:\Windows\system32\schtasks.exe
            schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
            4⤵
            • Creates scheduled task(s)
            PID:2580
          • C:\Windows\windefender.exe
            "C:\Windows\windefender.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:760
            • C:\Windows\SysWOW64\cmd.exe
              cmd.exe /C sc sdset WinDefender D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPLOCRSDRCWDWO;;;BA)(D;;WPDT;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)
              5⤵
                PID:1640
                • C:\Windows\SysWOW64\sc.exe
                  sc sdset WinDefender D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPLOCRSDRCWDWO;;;BA)(D;;WPDT;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)
                  6⤵
                  • Launches sc.exe
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1064
      • C:\Windows\system32\makecab.exe
        "C:\Windows\system32\makecab.exe" C:\Windows\Logs\CBS\CbsPersist_20240210043514.log C:\Windows\Logs\CBS\CbsPersist_20240210043514.cab
        1⤵
        • Drops file in Windows directory
        PID:2712
      • C:\Windows\windefender.exe
        C:\Windows\windefender.exe
        1⤵
        • Executes dropped EXE
        • Modifies data under HKEY_USERS
        PID:1480

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            Cab73BB.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Cab73BB.tmp
            • Size 65KB
            • SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
            • MD5 SHA1 SHA512 SSDEEP

            download.error

            • Path C:\Users\Admin\AppData\Local\Temp\Symbols\ntkrnlmp.pdb\AAF33CF37E194E98957768CF9C02DE8E2\download.error
            • Size 4.1MB
            • SHA256 82a0d8310f980206bfd6d0b185b9b219b1cc86351117ae2e9be8705cb13a3bdf
            • MD5 SHA1 SHA512 SSDEEP

            download.error

            • Path C:\Users\Admin\AppData\Local\Temp\Symbols\winload_prod.pdb\768283CA443847FB8822F9DB1F36ECC51\download.error
            • Size 492KB
            • SHA256 feb122b7916a1e62a7a6ae8d25ea48a2efc86f6e6384f5526e18ffbfc5f5ff71
            • MD5 SHA1 SHA512 SSDEEP

            Tar7499.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Tar7499.tmp
            • Size 171KB
            • SHA256 4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f
            • MD5 SHA1 SHA512 SSDEEP

            patch.exe

            • Path C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe
            • Size 136KB
            • SHA256 d1fe164bc7c44a7cbf8614118c617afa2d305959e8a960a3b6a95fa8b12b7f8a
            • MD5 SHA1 SHA512 SSDEEP

            ntkrnlmp.exe

            • Path C:\Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
            • Size 28KB
            • SHA256 e10a2447104cddbdfc825022b937375ae620cf3f0bda5b62d0299abbad916b24
            • MD5 SHA1 SHA512 SSDEEP

            csrss.exe

            • Path C:\Windows\rss\csrss.exe
            • Size 128KB
            • SHA256 ffcc19d131a98fd0394eccf4bd26daccb6c9ee189199ec222096e4559bc18518
            • MD5 SHA1 SHA512 SSDEEP

            csrss.exe

            • Path C:\Windows\rss\csrss.exe
            • Size 64KB
            • SHA256 65116d60d74be4a544e2a15d6932d0aeb4b472a4411190a9ba69f3bd5bddb99e
            • MD5 SHA1 SHA512 SSDEEP

            csrss.exe

            • Path C:\Windows\rss\csrss.exe
            • Size 1.4MB
            • SHA256 8522cc93a3160ab0168529621237e9e478d05601f6dc516da24f162b83633893
            • MD5 SHA1 SHA512 SSDEEP

            windefender.exe

            • Path C:\Windows\windefender.exe
            • Size 2.0MB
            • SHA256 166ddb03ff3c89bd4525ac390067e180fdd08f10fbcf4aadb0189541673c03fa
            • MD5 SHA1 SHA512 SSDEEP

            dsefix.exe

            • Path \Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
            • Size 94KB
            • SHA256 414035cc96d8bcc87ed173852a839ffbb45882a98c7a6f7b821e1668891deef0
            • MD5 SHA1 SHA512 SSDEEP

            injector.exe

            • Path \Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
            • Size 281KB
            • SHA256 5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1
            • MD5 SHA1 SHA512 SSDEEP

            patch.exe

            • Path \Users\Admin\AppData\Local\Temp\csrss\patch.exe
            • Size 195KB
            • SHA256 ffa220ca01db9c035a1bfb12d3c9faa33ce59bb28adb62abfc21aa465f60c414
            • MD5 SHA1 SHA512 SSDEEP

            dbghelp.dll

            • Path \Users\Admin\AppData\Local\Temp\dbghelp.dll
            • Size 1.5MB
            • SHA256 6e58fcf4d763022b1f79a3c448eb2ebd8ad1c15df3acf58416893f1cbc699026
            • MD5 SHA1 SHA512 SSDEEP

            ntkrnlmp.exe

            • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
            • Size 2.0MB
            • SHA256 d7b289c14ebe91a4a0b48a7391d419a7f8efded86a67c1f6f8a4010518a633f2
            • MD5 SHA1 SHA512 SSDEEP

            ntkrnlmp.exe

            • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
            • Size 1.9MB
            • SHA256 88bcd139688979f64362f0b408465323ae643fb0f6a453d93ddfe2cb15b798dc
            • MD5 SHA1 SHA512 SSDEEP

            ntkrnlmp.exe

            • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
            • Size 45KB
            • SHA256 ae7482df4f163c9d74df5f0ba85cfa7c0269b2b314eecfda2fac97ee221afe62
            • MD5 SHA1 SHA512 SSDEEP

            osloader.exe

            • Path \Users\Admin\AppData\Local\Temp\osloader.exe
            • Size 591KB
            • SHA256 b74cd24cef07f0226e7b777f7862943faee4cf288178b423d5344b0769dc15d4
            • MD5 SHA1 SHA512 SSDEEP

            symsrv.dll

            • Path \Users\Admin\AppData\Local\Temp\symsrv.dll
            • Size 140KB
            • SHA256 ff6141a2665dc1eb48aaf30d251306d7e24c8abb979e9533dc65e199713a8c16
            • MD5 SHA1 SHA512 SSDEEP

            csrss.exe

            • Path \Windows\rss\csrss.exe
            • Size 256KB
            • SHA256 b4d7bc5b98b5b63c57b5e310ab51e8fb01a9ce1c2fdb612a8cd5bdb2e8b07647
            • MD5 SHA1 SHA512 SSDEEP

            csrss.exe

            • Path \Windows\rss\csrss.exe
            • Size 2.6MB
            • SHA256 bd4ebf845b277f32a59bb86f6427a904529fe39424be81c5086f5077d7a4348c
            • MD5 SHA1 SHA512 SSDEEP

            memory/760-153-0x0000000000400000-0x00000000008DF000-memory.dmp

            memory/760-157-0x0000000000400000-0x00000000008DF000-memory.dmp

            memory/1192-44-0x0000000140000000-0x00000001405E8000-memory.dmp

            memory/1192-30-0x0000000140000000-0x00000001405E8000-memory.dmp

            memory/1480-156-0x0000000000400000-0x00000000008DF000-memory.dmp

            memory/1480-163-0x0000000000400000-0x00000000008DF000-memory.dmp

            memory/1480-169-0x0000000000400000-0x00000000008DF000-memory.dmp

            memory/1480-159-0x0000000000400000-0x00000000008DF000-memory.dmp

            memory/1940-9-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/1940-18-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/1940-21-0x0000000002770000-0x0000000002B68000-memory.dmp

            memory/1940-5-0x0000000002770000-0x0000000002B68000-memory.dmp

            memory/1940-7-0x0000000002770000-0x0000000002B68000-memory.dmp

            memory/2348-1-0x00000000026E0000-0x0000000002AD8000-memory.dmp

            memory/2348-0-0x00000000026E0000-0x0000000002AD8000-memory.dmp

            memory/2348-2-0x0000000002AE0000-0x00000000033CB000-memory.dmp

            memory/2348-3-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2348-8-0x00000000026E0000-0x0000000002AD8000-memory.dmp

            memory/2348-6-0x0000000002AE0000-0x00000000033CB000-memory.dmp

            memory/2348-4-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-148-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-160-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-118-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-152-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-117-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-116-0x00000000027D0000-0x0000000002BC8000-memory.dmp

            memory/2892-101-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-158-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-19-0x00000000027D0000-0x0000000002BC8000-memory.dmp

            memory/2892-23-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-162-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-20-0x00000000027D0000-0x0000000002BC8000-memory.dmp

            memory/2892-164-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-166-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-168-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-22-0x0000000002BD0000-0x00000000034BB000-memory.dmp

            memory/2892-170-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-172-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-174-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2892-176-0x0000000000400000-0x0000000000D1C000-memory.dmp