Analysis

  • max time kernel
    122s
  • max time network
    127s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    19-02-2025 04:55

General

  • Target

    2025-02-19_ee93e7fdbd5b2c719a449bd6f20f4470_wannacry.exe

  • Size

    2.4MB

  • MD5

    ee93e7fdbd5b2c719a449bd6f20f4470

  • SHA1

    d72a94fa8008d7cd412717b38481a52aabf69140

  • SHA256

    3ee96efb06a74e9e6dd975669490a6422373e4ee1858b9779809e2a5668440bf

  • SHA512

    1de992e6989573d2b2601569878bcd80736d39607905fe08ee933c88409264b9618d225d7df195a84573f33a5dc83adc315e07fc7700a672646883c1c92fb0cc

  • SSDEEP

    24576:MuaKvKYhkjUKGueMQcvD+96bK+/bAzkKh2fo1MEHY+tvR2lBicNRK:tKhpGd9V4D+Fi0cr

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.

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 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 2 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\2025-02-19_ee93e7fdbd5b2c719a449bd6f20f4470_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-02-19_ee93e7fdbd5b2c719a449bd6f20f4470_wannacry.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2780
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.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:2760
      • 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:1608
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2560
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2488
      • 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:1656
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2052
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1004
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1396
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:828
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\decrypt.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:1708
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2432
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1436
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2856
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1160

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        499B

        MD5

        fe3f7675f090724058c4e9e610f0f7ed

        SHA1

        7aa494428ab7c8d7a8506acbef1dc338866a6346

        SHA256

        a5d2e7640d0c847fd536dbed93c55f5d9256de078fa36259e7d8979593006d56

        SHA512

        55608e8c78324e13377842270e495f5753fffe059b29829783834971ccfe790c15e8a45572ed7cb470102716b5233401baad46aaa682599b321071ce696a3a7a

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

        Filesize

        2.4MB

        MD5

        ee93e7fdbd5b2c719a449bd6f20f4470

        SHA1

        d72a94fa8008d7cd412717b38481a52aabf69140

        SHA256

        3ee96efb06a74e9e6dd975669490a6422373e4ee1858b9779809e2a5668440bf

        SHA512

        1de992e6989573d2b2601569878bcd80736d39607905fe08ee933c88409264b9618d225d7df195a84573f33a5dc83adc315e07fc7700a672646883c1c92fb0cc

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2760-10-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

        Filesize

        9.9MB

      • memory/2760-9-0x0000000001210000-0x0000000001486000-memory.dmp

        Filesize

        2.5MB

      • memory/2760-11-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

        Filesize

        9.9MB

      • memory/2760-1052-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

        Filesize

        9.9MB

      • memory/2780-0-0x000007FEF5BC3000-0x000007FEF5BC4000-memory.dmp

        Filesize

        4KB

      • memory/2780-1-0x00000000011D0000-0x0000000001446000-memory.dmp

        Filesize

        2.5MB

      • memory/2780-2-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

        Filesize

        9.9MB

      • memory/2780-8-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

        Filesize

        9.9MB