Analysis

  • max time kernel
    143s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-03-2024 05:38

General

  • Target

    2024-03-25_57099c6158c0aa97503a9c27243352a9_wannacry.exe

  • Size

    291KB

  • MD5

    57099c6158c0aa97503a9c27243352a9

  • SHA1

    845d6af54e4adfefb4d41c8163fd267149a8eede

  • SHA256

    f813c628d489e6da2a57ac1ef6c4152382f810ffe3e19ac2c296c7a26b5a6a99

  • SHA512

    5c912fe51e9d0d5b5e2c8d50933dc82b7fdaed2f4c12b83c67b0dc8d50f36af9d0a00ff060c1528dd08f6c6a3f6f7c42d674b7a4d3e7e98f419f1352c2afe200

  • SSDEEP

    6144:sRr9JniaNck2r4EARGbZT5q6IAMun3BjuApIVFyAyABZn14UcfV426wsyijk:s9iaWk2XARw5qFAMun8ApIVFyLAY

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • Deletes shadow copies 2 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 51 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\2024-03-25_57099c6158c0aa97503a9c27243352a9_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-25_57099c6158c0aa97503a9c27243352a9_wannacry.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4924
    • C:\Users\Admin\AppData\Roaming\SatanCD.exe
      "C:\Users\Admin\AppData\Roaming\SatanCD.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:5044
      • 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:4776
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:4360
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1340
      • 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:5080
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:392
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3144
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4352
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:4912
      • 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:1048
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4252 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2208
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3992
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4424
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:3684
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
        • Checks SCSI registry key(s)
        PID:284

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        291KB

        MD5

        57099c6158c0aa97503a9c27243352a9

        SHA1

        845d6af54e4adfefb4d41c8163fd267149a8eede

        SHA256

        f813c628d489e6da2a57ac1ef6c4152382f810ffe3e19ac2c296c7a26b5a6a99

        SHA512

        5c912fe51e9d0d5b5e2c8d50933dc82b7fdaed2f4c12b83c67b0dc8d50f36af9d0a00ff060c1528dd08f6c6a3f6f7c42d674b7a4d3e7e98f419f1352c2afe200

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

        Filesize

        3KB

        MD5

        bfd6e91030d6beb16abc89281846bb72

        SHA1

        1b508a68c2d0fb9a58253e6e461acd033fb6ac95

        SHA256

        3a01b0fc15adfcefe454da22414399f8a8c504887dce78c7d24988448d1c9817

        SHA512

        4c528a32b498e2827ea40cea90a4a6a8cf25466f0eb0ea62543e99f5eaf3dab0195dc6d07a5c570fd7c86bf720066ab144c2f222b813050ed3cccab9880e23f1

      • memory/4924-0-0x0000000000980000-0x00000000009D0000-memory.dmp

        Filesize

        320KB

      • memory/4924-1-0x00007FFCA2B00000-0x00007FFCA35C1000-memory.dmp

        Filesize

        10.8MB

      • memory/4924-15-0x00007FFCA2B00000-0x00007FFCA35C1000-memory.dmp

        Filesize

        10.8MB

      • memory/5044-14-0x00007FFCA2B00000-0x00007FFCA35C1000-memory.dmp

        Filesize

        10.8MB

      • memory/5044-17-0x0000000001560000-0x0000000001570000-memory.dmp

        Filesize

        64KB

      • memory/5044-355-0x00007FFCA2B00000-0x00007FFCA35C1000-memory.dmp

        Filesize

        10.8MB

      • memory/5044-434-0x0000000001560000-0x0000000001570000-memory.dmp

        Filesize

        64KB