Analysis

  • max time kernel
    91s
  • max time network
    93s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    14-02-2022 19:19

General

  • Target

    bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe

  • Size

    60KB

  • MD5

    0ed2ca539a01cdb86c88a9a1604b2005

  • SHA1

    4fed7eae00bfa21938e49f33b7c6794fd7d0750c

  • SHA256

    bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8

  • SHA512

    34dad101cd7c5f9ff2267674d224986b9274e0e17d9ae665ca1af4ffa57408106238b1e248045465ab17c72a4b92473ab3714aefb705d95f9725a4251379c7e2

Malware Config

Signatures

  • WastedLocker

    Ransomware family seen in the wild since May 2020.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 2 IoCs
  • Modifies extensions of user files 18 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Possible privilege escalation attempt 2 IoCs
  • Modifies file permissions 1 TTPs 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Windows directory 3 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies data under HKEY_USERS 53 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs
  • Views/modifies file attributes 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe
    "C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe"
    1⤵
    • NTFS ADS
    • Suspicious use of WriteProcessMemory
    PID:396
    • C:\Users\Admin\AppData\Roaming\Net:bin
      C:\Users\Admin\AppData\Roaming\Net:bin -r
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:3004
      • C:\Windows\system32\vssadmin.exe
        C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Interacts with shadow copies
        PID:1252
      • C:\Windows\SysWOW64\takeown.exe
        C:\Windows\system32\takeown.exe /F C:\Windows\system32\Graphics.exe
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:3896
      • C:\Windows\SysWOW64\icacls.exe
        C:\Windows\system32\icacls.exe C:\Windows\system32\Graphics.exe /reset
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:3904
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Net" & del "C:\Users\Admin\AppData\Roaming\Net"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:988
        • C:\Windows\SysWOW64\choice.exe
          choice /t 10 /d y
          4⤵
            PID:284
          • C:\Windows\SysWOW64\attrib.exe
            attrib -h "C:\Users\Admin\AppData\Roaming\Net"
            4⤵
            • Views/modifies file attributes
            PID:2860
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe" & del "C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1396
        • C:\Windows\SysWOW64\choice.exe
          choice /t 10 /d y
          3⤵
            PID:276
          • C:\Windows\SysWOW64\attrib.exe
            attrib -h "C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe"
            3⤵
            • Views/modifies file attributes
            PID:1572
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2184
      • C:\Windows\system32\MusNotifyIcon.exe
        %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
        1⤵
        • Checks processor information in registry
        PID:3364
      • C:\Windows\SysWOW64\Graphics.exe
        C:\Windows\SysWOW64\Graphics.exe -s
        1⤵
        • Executes dropped EXE
        • Modifies extensions of user files
        • Suspicious use of WriteProcessMemory
        PID:3980
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Graphics.exe" & del "C:\Windows\SysWOW64\Graphics.exe"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:648
          • C:\Windows\SysWOW64\choice.exe
            choice /t 10 /d y
            3⤵
              PID:2180
            • C:\Windows\SysWOW64\attrib.exe
              attrib -h "C:\Windows\SysWOW64\Graphics.exe"
              3⤵
              • Drops file in System32 directory
              • Views/modifies file attributes
              PID:3316
        • C:\Windows\System32\svchost.exe
          C:\Windows\System32\svchost.exe -k NetworkService -p
          1⤵
          • Drops file in Windows directory
          • Modifies data under HKEY_USERS
          PID:1364
        • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
          C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
          1⤵
          • Drops file in Windows directory
          • Suspicious use of AdjustPrivilegeToken
          PID:2688

        Network

        MITRE ATT&CK Enterprise v6

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