Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    19/02/2024, 23:48

General

  • Target
    436064e5e336496f35f667079d9d22d2.exe
  • Size 4.1MB
  • Sample240219-3tenbsff7v
  • SHA256 99c1c3d791b1224d504c5e4e86aca05acc1cea4f1e3e08d499be8a1df2dcb69e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Glupteba

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

  • Glupteba payload 22 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 6 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\436064e5e336496f35f667079d9d22d2.exe
    "C:\Users\Admin\AppData\Local\Temp\436064e5e336496f35f667079d9d22d2.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3036
    • C:\Users\Admin\AppData\Local\Temp\436064e5e336496f35f667079d9d22d2.exe
      "C:\Users\Admin\AppData\Local\Temp\436064e5e336496f35f667079d9d22d2.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:2608
      • 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:1776
        • 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:2568
      • 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 system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2692
        • 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:2552
        • C:\Windows\system32\schtasks.exe
          schtasks /delete /tn ScheduledUpdate /f
          4⤵
            PID:1220
          • 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:2924
            • 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:616
            • 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:1948
            • 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:2076
            • 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:2996
            • 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:2140
            • 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:852
            • 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:2188
            • 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:696
            • 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:1764
            • 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:2532
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -timeout 0
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1988
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -default {71A3C7FC-F751-4982-AEC1-E958357E6813}
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1696
          • 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:1956
          • C:\Windows\system32\bcdedit.exe
            C:\Windows\Sysnative\bcdedit.exe /v
            4⤵
            • Modifies boot configuration data using bcdedit
            PID:2796
          • C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
            C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
            4⤵
            • Executes dropped EXE
            PID:1216
          • 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:2052
          • C:\Windows\windefender.exe
            "C:\Windows\windefender.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:240
            • 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:1176
                • 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:2896
      • C:\Windows\system32\makecab.exe
        "C:\Windows\system32\makecab.exe" C:\Windows\Logs\CBS\CbsPersist_20240219234813.log C:\Windows\Logs\CBS\CbsPersist_20240219234813.cab
        1⤵
        • Drops file in Windows directory
        PID:2728
      • C:\Windows\windefender.exe
        C:\Windows\windefender.exe
        1⤵
        • Executes dropped EXE
        • Modifies data under HKEY_USERS
        PID:660

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            CabC7A5.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\CabC7A5.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 5.8MB
            • SHA256 c83028003a1f5ef17f6188e006fe7fdd0d0e7b26442ac009c38cac3ee61cfb03
            • 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

            TarC863.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\TarC863.tmp
            • Size 171KB
            • SHA256 4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f
            • MD5 SHA1 SHA512 SSDEEP

            dsefix.exe

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

            injector.exe

            • Path C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
            • Size 256KB
            • SHA256 b016ff01136266c532dd701b150acdc5007b633171b3604fd1d6f75395890c5b
            • MD5 SHA1 SHA512 SSDEEP

            ntkrnlmp.exe

            • Path C:\Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
            • Size 985KB
            • SHA256 195e9053d1652f0e44b770bd93e6494c5b56802ea6f5b267ac4efe5ec6581560
            • MD5 SHA1 SHA512 SSDEEP

            osloader.exe

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

            csrss.exe

            • Path C:\Windows\rss\csrss.exe
            • Size 2.4MB
            • SHA256 f6f63668c88ecd88913b64bcac0e2496f9762e7c4a018500e7fe3ad11348fc7b
            • MD5 SHA1 SHA512 SSDEEP

            csrss.exe

            • Path C:\Windows\rss\csrss.exe
            • Size 3.5MB
            • SHA256 cd6d3e0cd31d6c00caceb7e6f1ce1a2cb05a819c95f38aa3742756d79b7b96d0
            • MD5 SHA1 SHA512 SSDEEP

            csrss.exe

            • Path C:\Windows\rss\csrss.exe
            • Size 4.1MB
            • SHA256 99c1c3d791b1224d504c5e4e86aca05acc1cea4f1e3e08d499be8a1df2dcb69e
            • MD5 SHA1 SHA512 SSDEEP

            windefender.exe

            • Path C:\Windows\windefender.exe
            • Size 2.0MB
            • SHA256 166ddb03ff3c89bd4525ac390067e180fdd08f10fbcf4aadb0189541673c03fa
            • 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 1.7MB
            • SHA256 f44a7deb678ae7bbaaadf88e4c620d7cdf7e6831a1656c456545b1c06feb4ef3
            • MD5 SHA1 SHA512 SSDEEP

            dbghelp.dll

            • Path \Users\Admin\AppData\Local\Temp\dbghelp.dll
            • Size 1.2MB
            • SHA256 15bf5001f27bb0c956611e19f44682a7eac1db191a6486e9437ecded8164e2b4
            • MD5 SHA1 SHA512 SSDEEP

            ntkrnlmp.exe

            • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
            • Size 1.1MB
            • SHA256 1484710752e54f61039dad53a835c0ca4fa5cd7d4841d0e64971d8dc0a69d717
            • MD5 SHA1 SHA512 SSDEEP

            ntkrnlmp.exe

            • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
            • Size 1.2MB
            • SHA256 dbb6aa4b12594e8354d586b4e601323086a5eaca813cc79db1d65f6ade49f71b
            • MD5 SHA1 SHA512 SSDEEP

            ntkrnlmp.exe

            • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
            • Size 1.7MB
            • SHA256 8e8378f83746090df6c1205304d1ac60f0446108f930030d8f4dfc9469824152
            • MD5 SHA1 SHA512 SSDEEP

            symsrv.dll

            • Path \Users\Admin\AppData\Local\Temp\symsrv.dll
            • Size 163KB
            • SHA256 e11e0f7804bfc485b19103a940be3d382f31c1378caca0c63076e27797d7553f
            • MD5 SHA1 SHA512 SSDEEP

            csrss.exe

            • Path \Windows\rss\csrss.exe
            • Size 2.2MB
            • SHA256 a0fc1d1d1091a63b58b7fd0f514b7b7168def52f9f9c10715c47ff29bb6ba6e1
            • MD5 SHA1 SHA512 SSDEEP

            csrss.exe

            • Path \Windows\rss\csrss.exe
            • Size 3.2MB
            • SHA256 f3fe1930c54f8317c48802e0075991b6d0323f1fdd79381c644263d5904d1d0e
            • MD5 SHA1 SHA512 SSDEEP

            memory/240-153-0x0000000000400000-0x00000000008DF000-memory.dmp

            memory/240-149-0x0000000000400000-0x00000000008DF000-memory.dmp

            memory/660-159-0x0000000000400000-0x00000000008DF000-memory.dmp

            memory/660-155-0x0000000000400000-0x00000000008DF000-memory.dmp

            memory/660-152-0x0000000000400000-0x00000000008DF000-memory.dmp

            memory/2608-7-0x0000000002770000-0x0000000002B68000-memory.dmp

            memory/2608-18-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2608-9-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2608-4-0x0000000002770000-0x0000000002B68000-memory.dmp

            memory/2692-156-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-145-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-102-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-103-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-104-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-172-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-170-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-98-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-168-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-160-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-166-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-164-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-20-0x00000000027B0000-0x0000000002BA8000-memory.dmp

            memory/2692-162-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-154-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2692-19-0x00000000027B0000-0x0000000002BA8000-memory.dmp

            memory/2692-158-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/2924-25-0x0000000140000000-0x00000001405E8000-memory.dmp

            memory/2924-41-0x0000000140000000-0x00000001405E8000-memory.dmp

            memory/3036-3-0x0000000000400000-0x0000000000D1C000-memory.dmp

            memory/3036-0-0x0000000002880000-0x0000000002C78000-memory.dmp

            memory/3036-8-0x0000000002880000-0x0000000002C78000-memory.dmp

            memory/3036-1-0x0000000002880000-0x0000000002C78000-memory.dmp

            memory/3036-2-0x0000000002C80000-0x000000000356B000-memory.dmp

            memory/3036-6-0x0000000002C80000-0x000000000356B000-memory.dmp

            memory/3036-5-0x0000000000400000-0x0000000000D1C000-memory.dmp