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Analysis

  • max time kernel
    150s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/03/2023, 01:12

General

  • Target

    d04d671861107d45589a22b2ceb2d02fe54c378cd698014e24ac7c718c40c0a1.exe

  • Size

    4.1MB

  • MD5

    92e57cfea586564113688d4d0583e1dd

  • SHA1

    e364d576e1ff519d74ba0caa29fa706df82f5527

  • SHA256

    d04d671861107d45589a22b2ceb2d02fe54c378cd698014e24ac7c718c40c0a1

  • SHA512

    ae00f79bd7a94c2f2265861f11c805a573032f9339bdfe33d450f9329db5d4b522002dd4f62e62324bd4beb7ed11f5f09f8fc3ee5dec54ca00177d7cde8bf190

  • SSDEEP

    98304:qOvZkWifERBwBvxjcKaTrMwi2GNRp1swkhINlWN6ulhd6:DhkswFFcKUrVi2pweINlWsk/6

Malware Config

Signatures

  • Glupteba

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

  • Glupteba payload 16 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Executes dropped EXE 2 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\d04d671861107d45589a22b2ceb2d02fe54c378cd698014e24ac7c718c40c0a1.exe
    "C:\Users\Admin\AppData\Local\Temp\d04d671861107d45589a22b2ceb2d02fe54c378cd698014e24ac7c718c40c0a1.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1160
    • C:\Users\Admin\AppData\Local\Temp\d04d671861107d45589a22b2ceb2d02fe54c378cd698014e24ac7c718c40c0a1.exe
      "C:\Users\Admin\AppData\Local\Temp\d04d671861107d45589a22b2ceb2d02fe54c378cd698014e24ac7c718c40c0a1.exe"
      2⤵
      • 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:3404
      • 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:4568
        • 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:4300
      • 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:3664
        • 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:1004
        • C:\Windows\SYSTEM32\schtasks.exe
          schtasks /delete /tn ScheduledUpdate /f
          4⤵
            PID:1204
          • 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:3676
          • 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:2092

    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

      92e57cfea586564113688d4d0583e1dd

      SHA1

      e364d576e1ff519d74ba0caa29fa706df82f5527

      SHA256

      d04d671861107d45589a22b2ceb2d02fe54c378cd698014e24ac7c718c40c0a1

      SHA512

      ae00f79bd7a94c2f2265861f11c805a573032f9339bdfe33d450f9329db5d4b522002dd4f62e62324bd4beb7ed11f5f09f8fc3ee5dec54ca00177d7cde8bf190

    • C:\Windows\rss\csrss.exe

      Filesize

      4.1MB

      MD5

      92e57cfea586564113688d4d0583e1dd

      SHA1

      e364d576e1ff519d74ba0caa29fa706df82f5527

      SHA256

      d04d671861107d45589a22b2ceb2d02fe54c378cd698014e24ac7c718c40c0a1

      SHA512

      ae00f79bd7a94c2f2265861f11c805a573032f9339bdfe33d450f9329db5d4b522002dd4f62e62324bd4beb7ed11f5f09f8fc3ee5dec54ca00177d7cde8bf190

    • memory/1160-134-0x0000000005100000-0x0000000005977000-memory.dmp

      Filesize

      8.5MB

    • memory/1160-135-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3404-140-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-151-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-149-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-150-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-148-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-152-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-153-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-154-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-155-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-156-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-157-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-158-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-159-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB

    • memory/3664-160-0x0000000000400000-0x0000000002F43000-memory.dmp

      Filesize

      43.3MB