Analysis

  • max time kernel
    117s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    23/03/2025, 23:54

General

  • Target

    2025-03-23_d3c77a381d509db6785a4d23b15d79d5_wannacry.exe

  • Size

    2.4MB

  • MD5

    d3c77a381d509db6785a4d23b15d79d5

  • SHA1

    1b8031147c9084068a013a7230b2adedf8a03fef

  • SHA256

    f0b4cc9ca7207386fa06793a0fd2dd2b2d5a0ee019af0a7afbeb5b1665af4271

  • SHA512

    0636a78a892878cc73c997d90553a358dc09c0dc6439dc5507db71b483d7b90dfd80a4b26cf0329b136bff422b8a32759a255812591390217c97beaceac416cd

  • SSDEEP

    24576:lNQl+ulA8Msy1byaVJW9uyb/is+9qi/8EnTx4tTlR6:lNa+uBy1bHVJomsMqqfFKx

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Chaos family
  • 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 3 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\2025-03-23_d3c77a381d509db6785a4d23b15d79d5_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-03-23_d3c77a381d509db6785a4d23b15d79d5_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2160
    • 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:2648
      • 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:2956
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:1304
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1336
      • 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:1952
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1488
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2180
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:648
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1624
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\bruh.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:1676
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1792
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1032
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:3000
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1760

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        2.4MB

        MD5

        d3c77a381d509db6785a4d23b15d79d5

        SHA1

        1b8031147c9084068a013a7230b2adedf8a03fef

        SHA256

        f0b4cc9ca7207386fa06793a0fd2dd2b2d5a0ee019af0a7afbeb5b1665af4271

        SHA512

        0636a78a892878cc73c997d90553a358dc09c0dc6439dc5507db71b483d7b90dfd80a4b26cf0329b136bff422b8a32759a255812591390217c97beaceac416cd

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

        Filesize

        292B

        MD5

        77718d329c0a749558fa94d4f6573036

        SHA1

        c2e6873c2a39944ed0c779cd5c8f479862f6a6e9

        SHA256

        e299ac3129c2dc99599080423ba6e68c3bc372b58cba6319e326f6e9266d22f1

        SHA512

        67c227dcfcf45742a1e6bfea6f57eabbc347e864349b1cc917b2384ae8dd91d6b2702fdc863fb926707ccb54db27f1cf3001b4242220c1a5ab623151b1dd4162

      • memory/2160-0-0x000007FEF5A23000-0x000007FEF5A24000-memory.dmp

        Filesize

        4KB

      • memory/2160-1-0x0000000000280000-0x00000000004E6000-memory.dmp

        Filesize

        2.4MB

      • memory/2648-7-0x0000000001140000-0x00000000013A6000-memory.dmp

        Filesize

        2.4MB

      • memory/2648-21-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

        Filesize

        9.9MB

      • memory/2648-30-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

        Filesize

        9.9MB

      • memory/2648-507-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

        Filesize

        9.9MB