Analysis

  • max time kernel
    149s
  • max time network
    142s
  • platform
    windows10-1703_x64
  • resource
    win10-20230220-en
  • resource tags

    arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system
  • submitted
    28-03-2023 19:39

General

  • Target

    6e88c879b593368a166e415ae74bb518b381bff385c0b716033d8c676d7c4d3c.exe

  • Size

    4.1MB

  • MD5

    537e7b65d99664786a92f79df3ef9998

  • SHA1

    b5a654e245561788ee9400bb81681424a0be3690

  • SHA256

    6e88c879b593368a166e415ae74bb518b381bff385c0b716033d8c676d7c4d3c

  • SHA512

    24bdb4905b1a6d95246963aa3a59faec0fef4f92c2318e2dae2e7b39a6618dfe87dcc97e3b270a32024d742b08cbcb594aecedb5bf8bd6d84b54af0de7436ea0

  • SSDEEP

    98304:m5WAcVPIJkEpWqzo2CYKTP49xfEJicYRmST5XhK2k70cm:MCweEp5zo2C3TP49cicYoGdU2A0cm

Malware Config

Signatures

  • Glupteba

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

  • Glupteba payload 17 IoCs
  • Windows security bypass 2 TTPs 7 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Executes dropped EXE 2 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.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • 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
  • 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
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 9 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\6e88c879b593368a166e415ae74bb518b381bff385c0b716033d8c676d7c4d3c.exe
    "C:\Users\Admin\AppData\Local\Temp\6e88c879b593368a166e415ae74bb518b381bff385c0b716033d8c676d7c4d3c.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3076
    • C:\Users\Admin\AppData\Local\Temp\6e88c879b593368a166e415ae74bb518b381bff385c0b716033d8c676d7c4d3c.exe
      "C:\Users\Admin\AppData\Local\Temp\6e88c879b593368a166e415ae74bb518b381bff385c0b716033d8c676d7c4d3c.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
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4372
      • 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:8
        • 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:408
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Manipulates WinMonFS driver.
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2088
        • 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:1960
        • C:\Windows\SYSTEM32\schtasks.exe
          schtasks /delete /tn ScheduledUpdate /f
          4⤵
            PID:2768
          • 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:4660
          • 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:4136

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
      Filesize

      281KB

      MD5

      d98e33b66343e7c96158444127a117f6

      SHA1

      bb716c5509a2bf345c6c1152f6e3e1452d39d50d

      SHA256

      5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1

      SHA512

      705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5

    • C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
      Filesize

      281KB

      MD5

      d98e33b66343e7c96158444127a117f6

      SHA1

      bb716c5509a2bf345c6c1152f6e3e1452d39d50d

      SHA256

      5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1

      SHA512

      705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5

    • C:\Windows\rss\csrss.exe
      Filesize

      4.1MB

      MD5

      537e7b65d99664786a92f79df3ef9998

      SHA1

      b5a654e245561788ee9400bb81681424a0be3690

      SHA256

      6e88c879b593368a166e415ae74bb518b381bff385c0b716033d8c676d7c4d3c

      SHA512

      24bdb4905b1a6d95246963aa3a59faec0fef4f92c2318e2dae2e7b39a6618dfe87dcc97e3b270a32024d742b08cbcb594aecedb5bf8bd6d84b54af0de7436ea0

    • C:\Windows\rss\csrss.exe
      Filesize

      4.1MB

      MD5

      537e7b65d99664786a92f79df3ef9998

      SHA1

      b5a654e245561788ee9400bb81681424a0be3690

      SHA256

      6e88c879b593368a166e415ae74bb518b381bff385c0b716033d8c676d7c4d3c

      SHA512

      24bdb4905b1a6d95246963aa3a59faec0fef4f92c2318e2dae2e7b39a6618dfe87dcc97e3b270a32024d742b08cbcb594aecedb5bf8bd6d84b54af0de7436ea0

    • memory/2088-138-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-141-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-148-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-135-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-136-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-137-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-147-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-139-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-140-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-146-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-142-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-143-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-144-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/2088-145-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/3076-121-0x0000000005070000-0x00000000058E7000-memory.dmp
      Filesize

      8.5MB

    • memory/3076-122-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB

    • memory/4372-127-0x0000000000400000-0x0000000002F4D000-memory.dmp
      Filesize

      43.3MB