Analysis

  • max time kernel
    119s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04-09-2024 06:41

General

  • Target

    2024-09-04_944a94e955dcdfd6bf8d20ac6f09b0de_wannacry.exe

  • Size

    388KB

  • MD5

    944a94e955dcdfd6bf8d20ac6f09b0de

  • SHA1

    9f1debe6edea9c586a2b4376b6ec57047bec7e0d

  • SHA256

    f16e0c8253a5d0e297a752f506b266e1525c593ca1f78c71f252544f6d2c84c1

  • SHA512

    b966fb881df5d5faff8a2f808a81d0b288072b476155a40f4abcf5e0b298a7154a0102603187bfe3d7eedc1cb8e16d4ccd7c52f7a23694b31222f447afb8116c

  • SSDEEP

    6144:KvEr9gXp97YQY8kuOybsP5OaoWzw7zDUJZP6l8cND0:ID7VY8kuOybsP5fKl84D

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Drops startup file 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 34 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Interacts with shadow copies 3 TTPs 1 IoCs

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

  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of WriteProcessMemory 30 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.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-09-04_944a94e955dcdfd6bf8d20ac6f09b0de_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-09-04_944a94e955dcdfd6bf8d20ac6f09b0de_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2880
    • C:\Users\Admin\AppData\Roaming\windowsdefender.exe
      "C:\Users\Admin\AppData\Roaming\windowsdefender.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Sets desktop wallpaper using registry
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1864
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2972
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:992
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2104
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:444
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2140
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2508
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1888
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:820
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\README.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:1624
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2032
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:108
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2176
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2132

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Roaming\windowsdefender.exe

        Filesize

        388KB

        MD5

        944a94e955dcdfd6bf8d20ac6f09b0de

        SHA1

        9f1debe6edea9c586a2b4376b6ec57047bec7e0d

        SHA256

        f16e0c8253a5d0e297a752f506b266e1525c593ca1f78c71f252544f6d2c84c1

        SHA512

        b966fb881df5d5faff8a2f808a81d0b288072b476155a40f4abcf5e0b298a7154a0102603187bfe3d7eedc1cb8e16d4ccd7c52f7a23694b31222f447afb8116c

      • C:\Users\Admin\Documents\README.txt

        Filesize

        158B

        MD5

        fd0f1ca751bd4de5c2a568bf3f988858

        SHA1

        ea9f1c0c32d0cea7f908541c8e21f4ef85944f44

        SHA256

        68f2dd3a115e2eb559140cef68b871dd60afa0f972bff9cbcfb4582ad65f6b5f

        SHA512

        5bea4f1b6526fb6a8c29410a6aab20b294dc421619a5e83402ab58cf0eb574044257fd3d4bd0dabe32273f9fd0e90cbf167f092d6e37903633b73e73a90bf777

      • memory/1864-7-0x00000000013B0000-0x0000000001416000-memory.dmp

        Filesize

        408KB

      • memory/1864-9-0x000007FEF64F0000-0x000007FEF6EDC000-memory.dmp

        Filesize

        9.9MB

      • memory/1864-10-0x000007FEF64F0000-0x000007FEF6EDC000-memory.dmp

        Filesize

        9.9MB

      • memory/1864-494-0x000007FEF64F0000-0x000007FEF6EDC000-memory.dmp

        Filesize

        9.9MB

      • memory/1864-495-0x000007FEF64F0000-0x000007FEF6EDC000-memory.dmp

        Filesize

        9.9MB

      • memory/2880-0-0x000007FEF64F3000-0x000007FEF64F4000-memory.dmp

        Filesize

        4KB

      • memory/2880-1-0x0000000000320000-0x0000000000386000-memory.dmp

        Filesize

        408KB