Analysis

  • max time kernel
    151s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/02/2024, 02:32

General

  • Target
    8dff603b6b82c94d3f83ef03c9c6f952.exe
  • Size 4.4MB
  • Sample240204-c1ct7sfdb5
  • SHA256 5b51e7565c63fd0e891dce9421fbf2f24a413100f5307bf8298cef3a1d0de1d1
  • 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 20 IoCs
  • MetaSploit

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

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Executes dropped EXE 2 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 WinMonFS driver. 1 IoCs

    Roottkits write to WinMonFS to hide directories/files from being detected.

  • Drops file in System32 directory 8 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 2 IoCs
  • Creates scheduled task(s) 1 TTPs 1 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 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 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\8dff603b6b82c94d3f83ef03c9c6f952.exe
    "C:\Users\Admin\AppData\Local\Temp\8dff603b6b82c94d3f83ef03c9c6f952.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3508
    • C:\Users\Admin\AppData\Local\Temp\8dff603b6b82c94d3f83ef03c9c6f952.exe
      "C:\Users\Admin\AppData\Local\Temp\8dff603b6b82c94d3f83ef03c9c6f952.exe"
      2⤵
      • Adds Run key to start application
      • Drops file in System32 directory
      • Checks for VirtualBox DLLs, possible anti-VM trick
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3832
      • 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:864
        • 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
          PID:648
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe /197-197
        3⤵
        • Executes dropped EXE
        • Manipulates WinMonFS driver.
        • Modifies data under HKEY_USERS
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4512
        • 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:4048
        • 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:4888

Network

        MITRE ATT&CK Enterprise v15

        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

        csrss.exe

        • Path C:\Windows\rss\csrss.exe
        • Size 2.3MB
        • SHA256 19244a4234232cf01d727391fc6e4227b1f912e0794d3ea016b5738d55d34e62
        • MD5 SHA1 SHA512 SSDEEP

        csrss.exe

        • Path C:\Windows\rss\csrss.exe
        • Size 2.2MB
        • SHA256 e950ca69858a76919348d9741ccc1f4f6ab951f2449e9d0d958ce745bbfe2104
        • MD5 SHA1 SHA512 SSDEEP

        memory/3508-2-0x0000000002FF0000-0x0000000003916000-memory.dmp

        memory/3508-3-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/3508-4-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/3508-6-0x0000000002FF0000-0x0000000003916000-memory.dmp

        memory/3508-1-0x0000000002BB0000-0x0000000002FEE000-memory.dmp

        memory/3832-7-0x0000000002D90000-0x00000000031D9000-memory.dmp

        memory/3832-8-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/3832-15-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-27-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-33-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-20-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-19-0x0000000003000000-0x0000000003500000-memory.dmp

        memory/4512-28-0x0000000003000000-0x0000000003500000-memory.dmp

        memory/4512-29-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-30-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-31-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-32-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-21-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-34-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-35-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-36-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-37-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-38-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-39-0x0000000000400000-0x00000000027DD000-memory.dmp

        memory/4512-40-0x0000000000400000-0x00000000027DD000-memory.dmp