Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    02/06/2026, 11:15

General

  • Target
    tmpmvx2mpfs.exe
  • Size 4.1MB
  • Sample260602-ncwsyscx9q
  • SHA256 7b54e3fbfeb7238f60e3d1d2649aed347f28a77dabcfee0811eee6608e659fbb
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Glupteba

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

  • Glupteba payload 22 IoCs
  • Windows security bypass 2 TTPs 7 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Executes dropped EXE 6 IoCs
  • 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 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 2 IoCs
  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 4 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\tmpmvx2mpfs.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpmvx2mpfs.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:5212
    • C:\Users\Admin\AppData\Local\Temp\tmpmvx2mpfs.exe
      "C:\Users\Admin\AppData\Local\Temp\tmpmvx2mpfs.exe"
      2⤵
      • Windows security bypass
      • Windows security modification
      • Adds Run key to start application
      • Checks for VirtualBox DLLs, possible anti-VM trick
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:6108
      • 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:4052
        • 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
          • Event Triggered Execution: Netsh Helper DLL
          PID:2024
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Manipulates WinMonFS driver.
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3848
        • C:\Windows\SYSTEM32\schtasks.exe
          schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:4440
        • C:\Windows\SYSTEM32\schtasks.exe
          schtasks /delete /tn ScheduledUpdate /f
          4⤵
            PID:1768
          • 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:1904
          • C:\Windows\SYSTEM32\schtasks.exe
            schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
            4⤵
            • Scheduled Task/Job: Scheduled Task
            PID:1088
    • C:\Windows\rss\csrss.exe
      "C:\Windows\rss\csrss.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4336
      • C:\Windows\rss\csrss.exe
        "C:\Windows\rss\csrss.exe"
        2⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:5252
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 5252 -s 836
          3⤵
          • Program crash
          PID:2656
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4336 -s 828
        2⤵
        • Program crash
        PID:5848
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4336 -ip 4336
      1⤵
        PID:5764
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe
        1⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:5512
        • C:\Windows\rss\csrss.exe
          "C:\Windows\rss\csrss.exe"
          2⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:2596
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 2596 -s 820
            3⤵
            • Program crash
            PID:2100
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 5512 -s 824
          2⤵
          • Program crash
          PID:5900
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 5252 -ip 5252
        1⤵
          PID:5620
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 5512 -ip 5512
          1⤵
            PID:4860
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 2596 -ip 2596
            1⤵
              PID:1648

            Network

                  MITRE ATT&CK Enterprise v16

                  Replay Monitor

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                  Downloads

                  injector.exe

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

                  csrss.exe

                  • Path C:\Windows\rss\csrss.exe
                  • Size 4.1MB
                  • SHA256 7b54e3fbfeb7238f60e3d1d2649aed347f28a77dabcfee0811eee6608e659fbb
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  memory/2596-30-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-36-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-37-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-43-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-42-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-41-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-40-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-39-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-38-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-28-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-35-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-31-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-32-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-33-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/3848-34-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/4336-15-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/5212-2-0x0000000002E70000-0x00000000036E6000-memory.dmp

                  memory/5212-1-0x0000000002A70000-0x0000000002E64000-memory.dmp

                  memory/5212-4-0x0000000002E70000-0x00000000036E6000-memory.dmp

                  memory/5212-3-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/5252-25-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/5512-27-0x0000000000400000-0x0000000000C91000-memory.dmp

                  memory/6108-6-0x0000000002A20000-0x0000000002E16000-memory.dmp

                  memory/6108-11-0x0000000000400000-0x0000000000C91000-memory.dmp