Analysis

  • max time kernel
    122s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    13-02-2024 06:23

General

  • Target

    2024-02-13_6720d54c57eaf67f1abb0a02f30a8da1_wannacry.exe

  • Size

    2.1MB

  • MD5

    6720d54c57eaf67f1abb0a02f30a8da1

  • SHA1

    5e3e55ed9f0e8aa23ce86a03bf8f2e2a0c77a170

  • SHA256

    7be39ec32895583ce17edf3573e8471987f666d8fb56ecb6d4437bd4a6102b2f

  • SHA512

    b146ca2df3ee5016400064e51a87853e5897a638d8b3a81ac0b6c984acdef7490f39137d210a738dd562c7eb0a46e4b4f7b7e8b6bdf5a557a978131f0ab52304

  • SSDEEP

    1536:okYsc9Ovtaz4jaxtfb5Rxp17kZJr97nOcLyKnal:Esc9OvteJRf17EVLR6

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Detects command variations typically used by ransomware 3 IoCs
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (125) 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 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) 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 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 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\2024-02-13_6720d54c57eaf67f1abb0a02f30a8da1_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-13_6720d54c57eaf67f1abb0a02f30a8da1_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2324
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.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:2044
      • 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:2340
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2836
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2644
      • 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:2548
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2908
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2888
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2924
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1016
      • 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:272
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2828
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1264
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1624
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:800

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\read_it.txt

        Filesize

        511B

        MD5

        253ee1435cc73c85a7c2d3d8c001687c

        SHA1

        d482162d305dd0e9b30ed8cadad5ec5c2c8f4388

        SHA256

        c5304432c7fd799eff1fa7da45df706900b6028d76632c09e1ebe2ac7dd4a906

        SHA512

        48a462980836b64878ca10d329a9f814d65984c1a8ad4cb8e65b191627adc8a019b0635719ceb353e9c218612ac92a00797e8f7fab4d139f952944ed77889f04

      • C:\Users\Admin\AppData\Roaming\ShowImport.wmv

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

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

        Filesize

        2.1MB

        MD5

        6720d54c57eaf67f1abb0a02f30a8da1

        SHA1

        5e3e55ed9f0e8aa23ce86a03bf8f2e2a0c77a170

        SHA256

        7be39ec32895583ce17edf3573e8471987f666d8fb56ecb6d4437bd4a6102b2f

        SHA512

        b146ca2df3ee5016400064e51a87853e5897a638d8b3a81ac0b6c984acdef7490f39137d210a738dd562c7eb0a46e4b4f7b7e8b6bdf5a557a978131f0ab52304

      • memory/2044-7-0x0000000000020000-0x0000000000036000-memory.dmp

        Filesize

        88KB

      • memory/2044-9-0x000007FEF5C40000-0x000007FEF662C000-memory.dmp

        Filesize

        9.9MB

      • memory/2044-54-0x000000001AD00000-0x000000001AD80000-memory.dmp

        Filesize

        512KB

      • memory/2044-648-0x000007FEF5C40000-0x000007FEF662C000-memory.dmp

        Filesize

        9.9MB

      • memory/2044-657-0x000000001AD00000-0x000000001AD80000-memory.dmp

        Filesize

        512KB

      • memory/2324-0-0x0000000000D80000-0x0000000000D96000-memory.dmp

        Filesize

        88KB

      • memory/2324-1-0x000007FEF5C40000-0x000007FEF662C000-memory.dmp

        Filesize

        9.9MB

      • memory/2324-8-0x000007FEF5C40000-0x000007FEF662C000-memory.dmp

        Filesize

        9.9MB