Analysis

  • max time kernel
    121s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    08-07-2024 01:29

General

  • Target

    2024-07-08_bfc7d2b1138466cf6227670d9f8731ad_destroyer_wannacry.exe

  • Size

    27KB

  • MD5

    bfc7d2b1138466cf6227670d9f8731ad

  • SHA1

    7bab71576d5f05802cd63876f3e42e489775a9a8

  • SHA256

    ef97bc79042f3929e9e0cc2459f036857a53fee41d673ba54727c5ee219dafc8

  • SHA512

    db41b7923ed6cde870201f4fbe18779165df76510912644c0f4f28c29bf9aad1867a4316c08118ad32f094569d4ba5720a70295b7351899a2a3d038a1d473283

  • SSDEEP

    384:AmtWZPzzxAm1vAddehhvLKe21GS2NiNWllOy5o91Qd7aNI82vl:Ar7zxAmIde3ee2ISSigho9M7aa82t

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (186) 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 2 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 64 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.

  • 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\2024-07-08_bfc7d2b1138466cf6227670d9f8731ad_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-07-08_bfc7d2b1138466cf6227670d9f8731ad_destroyer_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2088
    • 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)
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2108
      • 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:3032
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2548
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2464
      • 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:604
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2356
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2248
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1572
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1900
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ-ME-H2490WRFSFSU.txt
        3⤵
          PID:440
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2644
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2420
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:2348
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
          PID:2200

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\ProgramData\Adobe\Updater6\READ-ME-H2490WRFSFSU.txt

          Filesize

          382B

          MD5

          12088a613ef8dc298111eb8745d1a4ec

          SHA1

          11daa8929a23b51f7e57219b029813e4f3fa01d3

          SHA256

          d6646124e0d5ad091a5f3b851539de0f59f15d6c02edf0af2ec673db632eb469

          SHA512

          5a3c8ac62132d951000d8182580809ef467ffdc4703e2b4382a55ee12c33dfbcaed6bf35c3535296b4b95043e4ca95f1876c30cfbe85e0bb89972a06e83fb957

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

          Filesize

          27KB

          MD5

          bfc7d2b1138466cf6227670d9f8731ad

          SHA1

          7bab71576d5f05802cd63876f3e42e489775a9a8

          SHA256

          ef97bc79042f3929e9e0cc2459f036857a53fee41d673ba54727c5ee219dafc8

          SHA512

          db41b7923ed6cde870201f4fbe18779165df76510912644c0f4f28c29bf9aad1867a4316c08118ad32f094569d4ba5720a70295b7351899a2a3d038a1d473283

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

          Filesize

          1B

          MD5

          d1457b72c3fb323a2671125aef3eab5d

          SHA1

          5bab61eb53176449e25c2c82f172b82cb13ffb9d

          SHA256

          8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

          SHA512

          ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

        • memory/2088-0-0x000007FEF5EA3000-0x000007FEF5EA4000-memory.dmp

          Filesize

          4KB

        • memory/2088-1-0x00000000013D0000-0x00000000013DE000-memory.dmp

          Filesize

          56KB

        • memory/2088-4-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

          Filesize

          9.9MB

        • memory/2088-11-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

          Filesize

          9.9MB

        • memory/2108-8-0x0000000000EE0000-0x0000000000EEE000-memory.dmp

          Filesize

          56KB

        • memory/2108-9-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

          Filesize

          9.9MB

        • memory/2108-10-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

          Filesize

          9.9MB

        • memory/2108-950-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

          Filesize

          9.9MB