Analysis

  • max time kernel
    121s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    20-12-2024 05:34

General

  • Target

    2024-12-20_9ce3929aaec5d8761a8e30097e005abf_wannacry.exe

  • Size

    518KB

  • MD5

    9ce3929aaec5d8761a8e30097e005abf

  • SHA1

    7d3747521d2d4eb933427891c6df6eb2adbe69ef

  • SHA256

    4e4f4ecd0a58337656a6f4fd8a2e728c7c8f4f33ca8886e0db16035f588d7680

  • SHA512

    360b7bbaaf2825a8ae472321d6d1173b37d8548e7bb5383b75222fd412794aa276f82efd492f4dbbac1d08ff80317264f2aaa0fd700bd77e424965d87722c4a6

  • SSDEEP

    12288:jI6ml8eenfmeq8je6e6U0T0aYA0eFHkRNaGU3N9nQFZ:2HosVN1jZ

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 1 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\2024-12-20_9ce3929aaec5d8761a8e30097e005abf_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-12-20_9ce3929aaec5d8761a8e30097e005abf_wannacry.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:612
    • 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:1060
      • 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:2704
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2708
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2580
      • 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:3036
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1716
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1708
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2804
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2876
      • 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:2552
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2664
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2416
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1772
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2840

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        288B

        MD5

        02d8e6c2e71aa2fc4ef58fa78d19327a

        SHA1

        17a5e1d326c50862e9bf137c2637eec016444cdf

        SHA256

        77b5b78f95f36dc5926ccbd9997cf490317a59ddf0d4fa824078004ab84fdbe7

        SHA512

        b115995d33820b71fddb9f35e84b3882b2c96d631c0268390fd1e4b4c98e7f5a3fac2335ff4d8071b50f21d4c87b9ea40c5b9bf74c5c769f08ab504589131152

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

        Filesize

        518KB

        MD5

        9ce3929aaec5d8761a8e30097e005abf

        SHA1

        7d3747521d2d4eb933427891c6df6eb2adbe69ef

        SHA256

        4e4f4ecd0a58337656a6f4fd8a2e728c7c8f4f33ca8886e0db16035f588d7680

        SHA512

        360b7bbaaf2825a8ae472321d6d1173b37d8548e7bb5383b75222fd412794aa276f82efd492f4dbbac1d08ff80317264f2aaa0fd700bd77e424965d87722c4a6

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/612-0-0x000007FEF5D33000-0x000007FEF5D34000-memory.dmp

        Filesize

        4KB

      • memory/612-1-0x0000000000960000-0x00000000009E8000-memory.dmp

        Filesize

        544KB

      • memory/612-3-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

        Filesize

        9.9MB

      • memory/612-7-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

        Filesize

        9.9MB

      • memory/1060-10-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

        Filesize

        9.9MB

      • memory/1060-9-0x0000000000010000-0x0000000000098000-memory.dmp

        Filesize

        544KB

      • memory/1060-11-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

        Filesize

        9.9MB

      • memory/1060-1049-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

        Filesize

        9.9MB