Analysis

  • max time kernel
    117s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    16-06-2024 19:24

General

  • Target

    2024-06-16_39606f25a795d1f1ae8d8a154780fab4_chaos_destroyer_wannacry.exe

  • Size

    27KB

  • MD5

    39606f25a795d1f1ae8d8a154780fab4

  • SHA1

    bfda025d280b22371f987b702e94682b1c0b7ba6

  • SHA256

    95b3dde51afe570553bd0f1ddba81a399532e33e5ac8979d64aaa9b009d071fb

  • SHA512

    6ecbac36383230b6d1891f5992adef8a3cc295ca64ba19d7221c093904a0b2174577b51e75e048b7853e95d0e5e14b9aedf0e97486b9071457009e85cb0bd61a

  • SSDEEP

    384:LtWZPzzxAm1vwePsd7lMDwXIYNl3Oy5o91s6x82vb:C7zxAmZsdweIAho92o82D

Malware Config

Extracted

Path

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

Ransom Note
Don't worry, you can return all your files! All your files like documents, photos, databases and other important are encrypted What guarantees do we give to you? You can send 3 of your encrypted files and we decrypt it for free. You must follow these steps To decrypt your files : 1) Write on our e-mail :[email protected] ( In case of no answer in 24 hours check your spam folder or write us to this e-mail: [email protected]) 2) Obtain Bitcoin (You have to pay for decryption in Bitcoins. After payment we will send you the tool that will decrypt all your files.)

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.

  • Detects command variations typically used by ransomware 3 IoCs
  • Detects executables containing many references to VEEAM. Observed in ransomware 3 IoCs
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (175) 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 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\2024-06-16_39606f25a795d1f1ae8d8a154780fab4_chaos_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-16_39606f25a795d1f1ae8d8a154780fab4_chaos_destroyer_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1652
    • 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:2732
      • 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:2688
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2848
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2116
      • 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:2536
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2916
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2932
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2976
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2972
      • 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:2184
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2844
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:300
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1424
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2780

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        582B

        MD5

        ed5cc52876db869de48a4783069c2a5e

        SHA1

        a9d51ceaeff715ace430f9462ab2ee4e7f33e70e

        SHA256

        45726f2f29967ef016f8d556fb6468a577307d67388cc4530295a9ca10fdfa36

        SHA512

        1745aefb9b4db4cdd7c08ee3a7d133db08f35a336fd18b598211519b481ef25ac84a3e8a3da3db06caef9f531288d1cf0ca8d4b2560637945e7953e8b45421f5

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

        Filesize

        27KB

        MD5

        39606f25a795d1f1ae8d8a154780fab4

        SHA1

        bfda025d280b22371f987b702e94682b1c0b7ba6

        SHA256

        95b3dde51afe570553bd0f1ddba81a399532e33e5ac8979d64aaa9b009d071fb

        SHA512

        6ecbac36383230b6d1891f5992adef8a3cc295ca64ba19d7221c093904a0b2174577b51e75e048b7853e95d0e5e14b9aedf0e97486b9071457009e85cb0bd61a

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/1652-0-0x000007FEF54C3000-0x000007FEF54C4000-memory.dmp

        Filesize

        4KB

      • memory/1652-1-0x0000000000890000-0x000000000089E000-memory.dmp

        Filesize

        56KB

      • memory/1652-3-0x000007FEF54C0000-0x000007FEF5EAC000-memory.dmp

        Filesize

        9.9MB

      • memory/1652-9-0x000007FEF54C0000-0x000007FEF5EAC000-memory.dmp

        Filesize

        9.9MB

      • memory/2732-8-0x00000000009A0000-0x00000000009AE000-memory.dmp

        Filesize

        56KB

      • memory/2732-10-0x000007FEF54C0000-0x000007FEF5EAC000-memory.dmp

        Filesize

        9.9MB

      • memory/2732-11-0x000007FEF54C0000-0x000007FEF5EAC000-memory.dmp

        Filesize

        9.9MB

      • memory/2732-896-0x000007FEF54C0000-0x000007FEF5EAC000-memory.dmp

        Filesize

        9.9MB