Analysis

  • max time kernel
    149s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    26/01/2024, 10:14

General

  • Target
    029cfa383c2a3c9934a370a3b88f93e1.exe
  • Size 4.1MB
  • Sample240126-l9mkfacfdp
  • SHA256 452c2fae1cf93f933ef30e73cd3ae5d8afc14286b0aa58a512c40f3e81e5a922
  • 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 9 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\029cfa383c2a3c9934a370a3b88f93e1.exe
    "C:\Users\Admin\AppData\Local\Temp\029cfa383c2a3c9934a370a3b88f93e1.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3056
    • C:\Users\Admin\AppData\Local\Temp\029cfa383c2a3c9934a370a3b88f93e1.exe
      "C:\Users\Admin\AppData\Local\Temp\029cfa383c2a3c9934a370a3b88f93e1.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:2540
        • 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:2572
      • 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:3068
        • C:\Windows\system32\schtasks.exe
          schtasks /delete /tn ScheduledUpdate /f
          4⤵
            PID:1900
          • 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:2588
          • 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:1984
            • 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:2072
            • 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:1644
            • 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:824
            • 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:684
            • 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:1928
            • 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:2012
            • 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:1000
            • 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:2456
            • 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:2304
            • 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:860
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -default {71A3C7FC-F751-4982-AEC1-E958357E6813}
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:2180
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -timeout 0
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:732
            • 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:1512
          • 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:2884
          • C:\Windows\system32\bcdedit.exe
            C:\Windows\Sysnative\bcdedit.exe /v
            4⤵
            • Modifies boot configuration data using bcdedit
            PID:1580
          • C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
            C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
            4⤵
            • Executes dropped EXE
            PID:2792
          • 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:1848
          • C:\Windows\windefender.exe
            "C:\Windows\windefender.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:2720
            • 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:840
                • 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:1564
      • C:\Windows\system32\makecab.exe
        "C:\Windows\system32\makecab.exe" C:\Windows\Logs\CBS\CbsPersist_20240126101411.log C:\Windows\Logs\CBS\CbsPersist_20240126101411.cab
        1⤵
          PID:2804
        • C:\Windows\windefender.exe
          C:\Windows\windefender.exe
          1⤵
          • Executes dropped EXE
          • Modifies data under HKEY_USERS
          PID:2052

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              Cab72C2.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\Cab72C2.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 419KB
              • SHA256 ffaf3ea80372449614145e5670c0576164afe2281d433e952ea8cc4611cfa552
              • MD5 SHA1 SHA512 SSDEEP

              download.error

              • Path C:\Users\Admin\AppData\Local\Temp\Symbols\winload_prod.pdb\768283CA443847FB8822F9DB1F36ECC51\download.error
              • Size 197KB
              • SHA256 443e7217ab26da9f18e13455748cd3a47559c9eebc51be401a4da6ab8dc14583
              • MD5 SHA1 SHA512 SSDEEP

              Tar7342.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\Tar7342.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 150KB
              • SHA256 08c478b0643c010ca649aed6e18d78706efd5ba7aa0523ffffd9bd75aa1bfb7c
              • MD5 SHA1 SHA512 SSDEEP

              patch.exe

              • Path C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe
              • Size 907KB
              • SHA256 99c46f85ed2d33b62d3ac4a9881bb65bd2c90f920fad7eb03475ea5856f8f29b
              • MD5 SHA1 SHA512 SSDEEP

              ntkrnlmp.exe

              • Path C:\Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
              • Size 126KB
              • SHA256 801bc94ad16800cc9c78b6d256579d74cdf12bb6dd210111f38c4a7b0ac32da7
              • 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 1.5MB
              • SHA256 1c8d8d590a02713ae183dda5bd1070aad7dc7533bb97c3d49b9314ef39ce1b77
              • MD5 SHA1 SHA512 SSDEEP

              csrss.exe

              • Path C:\Windows\rss\csrss.exe
              • Size 1.8MB
              • SHA256 86c15a5591514a0c3d759d10a26fcd233c8db76802bb70a43db557f4b77ab07e
              • MD5 SHA1 SHA512 SSDEEP

              csrss.exe

              • Path C:\Windows\rss\csrss.exe
              • Size 475KB
              • SHA256 fb9f84db0c55f4d304b327ebde17bf46b7fc3b030031eabaf07fe46b0ce887bd
              • MD5 SHA1 SHA512 SSDEEP

              windefender.exe

              • Path C:\Windows\windefender.exe
              • Size 46KB
              • SHA256 e1fa96048a41c3e18d6f3d08df8b30965dfd7e5592b932a461de74bc78bc8236
              • MD5 SHA1 SHA512 SSDEEP

              windefender.exe

              • Path C:\Windows\windefender.exe
              • Size 1.3MB
              • SHA256 2cdc748fb7fa7a6a4158d69190cb8e992630646741d6ed5deec9062a0137fc86
              • MD5 SHA1 SHA512 SSDEEP

              windefender.exe

              • Path C:\Windows\windefender.exe
              • Size 1.1MB
              • SHA256 9cdb710270b41ad2a8c6977e7457091aae3a35e735d1edfdd50915cae752c58b
              • MD5 SHA1 SHA512 SSDEEP

              injector.exe

              • Path \Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
              • Size 114KB
              • SHA256 c702a6c3977f3d99452aa5404dfe6645fe98723158edc165380aafd8f5528ec5
              • MD5 SHA1 SHA512 SSDEEP

              patch.exe

              • Path \Users\Admin\AppData\Local\Temp\csrss\patch.exe
              • Size 719KB
              • SHA256 e241202c5406be4a6460ac3e85812b0ca9a42a69e91574aed898b16a2180d545
              • MD5 SHA1 SHA512 SSDEEP

              dbghelp.dll

              • Path \Users\Admin\AppData\Local\Temp\dbghelp.dll
              • Size 427KB
              • SHA256 283f5f4ce5d2ef2cd31136078c9ec5bea6798a2b436b661dbd1a5e0ee97c7bce
              • MD5 SHA1 SHA512 SSDEEP

              ntkrnlmp.exe

              • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
              • Size 184KB
              • SHA256 0e1b490e6db5fe740e0cd283473a1ada699e3983cd08627bc8b568009d827bcb
              • MD5 SHA1 SHA512 SSDEEP

              ntkrnlmp.exe

              • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
              • Size 70KB
              • SHA256 f2ff66e2dc23df4672643ac87d90c4114b9fdc1b153e0bcfe4a568318d517985
              • MD5 SHA1 SHA512 SSDEEP

              ntkrnlmp.exe

              • Path \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
              • Size 78KB
              • SHA256 7e4dbcf634b3b3c7a295b633a790031f8c162985c62373da1180e47929150844
              • 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 1.5MB
              • SHA256 f107fb4de989919ed74298d5bd60a43ec5cbec607c9b926db93fd99926d9a64f
              • MD5 SHA1 SHA512 SSDEEP

              csrss.exe

              • Path \Windows\rss\csrss.exe
              • Size 1.2MB
              • SHA256 946601266eeb32b598872887adfbabac3bab9035b48d687626339c5abd8363e4
              • MD5 SHA1 SHA512 SSDEEP

              memory/1984-60-0x0000000140000000-0x00000001405E8000-memory.dmp

              memory/1984-41-0x0000000140000000-0x00000001405E8000-memory.dmp

              memory/2052-156-0x0000000000400000-0x00000000008DF000-memory.dmp

              memory/2052-168-0x0000000000400000-0x00000000008DF000-memory.dmp

              memory/2052-162-0x0000000000400000-0x00000000008DF000-memory.dmp

              memory/2052-158-0x0000000000400000-0x00000000008DF000-memory.dmp

              memory/2704-7-0x00000000032E0000-0x00000000036D8000-memory.dmp

              memory/2704-21-0x00000000032E0000-0x00000000036D8000-memory.dmp

              memory/2704-20-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/2704-10-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/2704-9-0x0000000004C70000-0x000000000555B000-memory.dmp

              memory/2704-5-0x00000000032E0000-0x00000000036D8000-memory.dmp

              memory/2720-152-0x0000000000400000-0x00000000008DF000-memory.dmp

              memory/2720-155-0x0000000000400000-0x00000000008DF000-memory.dmp

              memory/3056-2-0x0000000004AB0000-0x000000000539B000-memory.dmp

              memory/3056-8-0x0000000004AB0000-0x000000000539B000-memory.dmp

              memory/3056-6-0x0000000002F90000-0x0000000003388000-memory.dmp

              memory/3056-0-0x0000000002F90000-0x0000000003388000-memory.dmp

              memory/3056-4-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3056-1-0x0000000002F90000-0x0000000003388000-memory.dmp

              memory/3056-3-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-148-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-19-0x0000000003060000-0x0000000003458000-memory.dmp

              memory/3068-117-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-112-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-128-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-157-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-116-0x0000000003060000-0x0000000003458000-memory.dmp

              memory/3068-159-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-161-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-23-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-163-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-165-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-167-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-22-0x0000000003060000-0x0000000003458000-memory.dmp

              memory/3068-169-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-171-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-173-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-175-0x0000000000400000-0x0000000002EFA000-memory.dmp

              memory/3068-177-0x0000000000400000-0x0000000002EFA000-memory.dmp