Analysis

  • max time kernel
    147s
  • max time network
    139s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    08-03-2024 10:42

General

  • Target

    2024-03-08_619fc98c120d10c8b5be2215153d4b46_wannacry.exe

  • Size

    1.1MB

  • MD5

    619fc98c120d10c8b5be2215153d4b46

  • SHA1

    72cec945d3e057ee27e9ff2b6ede6ac8ca127eb5

  • SHA256

    7267439752d21c7856257c4a766b10d9d49301ee7207390d57025d1071bb080f

  • SHA512

    c443c07685c63c2e9c2ef025e6ba6b4b49679acd8ee2c27fddc305e6d08182cd6647ae4b590b00d1f9c90792dcf8d5906ce3fcfa3aedb775559c29fb6e4728a9

  • SSDEEP

    12288:yBo9M904nKzuJpWissPWYkeRLSyXd8R84sZKIhwiGXIVmgf//9b31q3C/NwHGlLi:D9TaXk89Lgwd/RlNzS6XB

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 4 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Detects command variations typically used by ransomware 4 IoCs
  • Detects executables containing many references to VEEAM. Observed in ransomware 4 IoCs
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (171) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Disables Task Manager via registry modification
  • Drops startup file 2 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 64 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 2 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 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 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\2024-03-08_619fc98c120d10c8b5be2215153d4b46_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-08_619fc98c120d10c8b5be2215153d4b46_wannacry.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1992
    • C:\Users\Admin\AppData\Roaming\Micosoft Edge (7).exe
      "C:\Users\Admin\AppData\Roaming\Micosoft Edge (7).exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • 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:2672
      • 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:2944
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:1512
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3052
      • 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:648
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1944
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2264
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2128
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2356
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:2184
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1100
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:768
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1784
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1968

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\Adobe\Updater6\read_it.txt

        Filesize

        361B

        MD5

        f20c9e44f4ebffc60633fdda598d46df

        SHA1

        603231bca4cb23c096e8a9517cd62d4d1b7d087e

        SHA256

        c6f95cdd7ab574f945f41309157e15012a29fb998281a23c4edd378584625f10

        SHA512

        4446bec8f45f2251a927fae44304ecc47587f31c774ee0701090b5366c6aa3ce0197acbe52453d6348fc7e088bc62fe90e483e05847f8b6ba325849bc4c3abd5

      • C:\Users\Admin\AppData\Roaming\Micosoft Edge (7).exe

        Filesize

        1.1MB

        MD5

        619fc98c120d10c8b5be2215153d4b46

        SHA1

        72cec945d3e057ee27e9ff2b6ede6ac8ca127eb5

        SHA256

        7267439752d21c7856257c4a766b10d9d49301ee7207390d57025d1071bb080f

        SHA512

        c443c07685c63c2e9c2ef025e6ba6b4b49679acd8ee2c27fddc305e6d08182cd6647ae4b590b00d1f9c90792dcf8d5906ce3fcfa3aedb775559c29fb6e4728a9

      • C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Notepad.lnk

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/1992-11-0x000007FEF5970000-0x000007FEF635C000-memory.dmp

        Filesize

        9.9MB

      • memory/1992-4-0x000000001AFC0000-0x000000001B040000-memory.dmp

        Filesize

        512KB

      • memory/1992-3-0x000007FEF5970000-0x000007FEF635C000-memory.dmp

        Filesize

        9.9MB

      • memory/1992-0-0x0000000000B40000-0x0000000000C56000-memory.dmp

        Filesize

        1.1MB

      • memory/1992-2-0x000000001AFC0000-0x000000001B040000-memory.dmp

        Filesize

        512KB

      • memory/1992-1-0x000007FEF5970000-0x000007FEF635C000-memory.dmp

        Filesize

        9.9MB

      • memory/2672-13-0x000000001B080000-0x000000001B100000-memory.dmp

        Filesize

        512KB

      • memory/2672-12-0x000007FEF5970000-0x000007FEF635C000-memory.dmp

        Filesize

        9.9MB

      • memory/2672-10-0x0000000000A00000-0x0000000000B16000-memory.dmp

        Filesize

        1.1MB

      • memory/2672-883-0x000007FEF5970000-0x000007FEF635C000-memory.dmp

        Filesize

        9.9MB

      • memory/2672-884-0x000000001B080000-0x000000001B100000-memory.dmp

        Filesize

        512KB