Analysis

  • max time kernel
    144s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-05-2024 13:30

General

  • Target

    2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe

  • Size

    3.2MB

  • MD5

    db5c28ec647afd894c01422584d551a5

  • SHA1

    fa0b5ebcb983509eebc7222725792976fad2aca8

  • SHA256

    524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4

  • SHA512

    730054505deddeeefce4b1cc3b8ea362946e9e12ea289bc64285c0ce417d8964a767d03ccdf69ab4dd184d9888b9f3c1b51134cfb9c067861b5c1f4c06a3f67a

  • SSDEEP

    24576:s0JR6V45PL2ybTlBpPcmtR9tArJms0dIU1wuKav4WgNFlLKKDGyMgl+ICHusEd:5iylZ9tAcBSGgJtAZu

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Detects command variations typically used by ransomware 2 IoCs
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

    SCSI 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 registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 48 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of WriteProcessMemory 20 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\2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-25_db5c28ec647afd894c01422584d551a5_wannacry.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4436
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Sets desktop wallpaper using registry
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3648
      • 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:3548
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:3604
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4540
      • 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:4228
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:4908
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3508
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4504
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2776
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Leggimi.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:4468
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1356
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4732
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:3376
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3960

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Execution

    Windows Management Instrumentation

    1
    T1047

    Command and Scripting Interpreter

    1
    T1059

    Defense Evasion

    Indicator Removal

    3
    T1070

    File Deletion

    3
    T1070.004

    Modify Registry

    1
    T1112

    Credential Access

    Unsecured Credentials

    1
    T1552

    Credentials In Files

    1
    T1552.001

    Discovery

    Query Registry

    3
    T1012

    System Information Discovery

    3
    T1082

    Peripheral Device Discovery

    1
    T1120

    Collection

    Data from Local System

    1
    T1005

    Impact

    Inhibit System Recovery

    4
    T1490

    Defacement

    1
    T1491

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\svchost.exe
      Filesize

      3.2MB

      MD5

      db5c28ec647afd894c01422584d551a5

      SHA1

      fa0b5ebcb983509eebc7222725792976fad2aca8

      SHA256

      524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4

      SHA512

      730054505deddeeefce4b1cc3b8ea362946e9e12ea289bc64285c0ce417d8964a767d03ccdf69ab4dd184d9888b9f3c1b51134cfb9c067861b5c1f4c06a3f67a

    • C:\Users\Admin\Documents\Leggimi.txt
      Filesize

      437B

      MD5

      9c5d9fd5db486b31324ad8eef0558c1b

      SHA1

      4d6e0b43ae59b8420730294d371118d6e429157f

      SHA256

      1f2154533308355548ad3694f03cc1582bc0aa549173a5d11920ac38469d6f3b

      SHA512

      b5c27756cbf8756dcfea07c6134e8711b61fcaa87360056609d65354e845adf2f00bc05140bf40044675b7c6cc7ef0b546bad3886a4cf34d12251570b49e80f7

    • memory/3648-15-0x00007FF96DF70000-0x00007FF96EA31000-memory.dmp
      Filesize

      10.8MB

    • memory/3648-487-0x00007FF96DF70000-0x00007FF96EA31000-memory.dmp
      Filesize

      10.8MB

    • memory/4436-0-0x00007FF96DF73000-0x00007FF96DF75000-memory.dmp
      Filesize

      8KB

    • memory/4436-1-0x0000000000600000-0x000000000093C000-memory.dmp
      Filesize

      3.2MB

    • memory/4436-2-0x00007FF96DF73000-0x00007FF96DF75000-memory.dmp
      Filesize

      8KB