Analysis

  • max time kernel
    122s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    21-02-2025 11:22

General

  • Target

    2025-02-21_e9cd337f5a8c2e65b8ac6e27593af184_destroyer_wannacry.exe

  • Size

    59KB

  • MD5

    e9cd337f5a8c2e65b8ac6e27593af184

  • SHA1

    f28caa61be74d34334837447cb727559ffc2aeb9

  • SHA256

    1eb024838ac5cc347fc5e318e98f69c5866dc102669af8d7ba07b87895e61f64

  • SHA512

    18fc6c8152dc9e896e8d44ceb5601ca2844c07d3809b54f017f3279b6282e79e1e93098ce83434742e54fde148f3bdc2d167566de22f2a456f32809445cae1ae

  • SSDEEP

    1536:tF2AxIc9SA7oC2IFNR7jwYkh2sdN3GMyry:6QIc9SZC2Iv9jwYU/3GM

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
  • Renames multiple (190) 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 3 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 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 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 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\2025-02-21_e9cd337f5a8c2e65b8ac6e27593af184_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-02-21_e9cd337f5a8c2e65b8ac6e27593af184_destroyer_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2120
    • C:\Users\Admin\AppData\Roaming\update.exe
      "C:\Users\Admin\AppData\Roaming\update.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:988
      • 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:2200
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2760
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2632
      • 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:3056
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1284
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1868
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1492
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:812
      • 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:2596
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2852
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1996
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1796
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1736

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        1KB

        MD5

        152ed25c08a2cf8815661d452628c6e4

        SHA1

        8ae021ddc75ce3b07c058c24c22d2d170c757cd1

        SHA256

        ef6453462375c4d30e60e51daafb848ba60d6a65683cf8e66be5fd70dadbda75

        SHA512

        b6512f2b3f084b770c66bf852460bdf1c1127d8bf548125f1fbf41171a1402ed7c7908d491281303109c2e053e5fd29dec28d8117443966d2cc6096bbf9469b4

      • C:\Users\Admin\AppData\Roaming\RenameResume.cab

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

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

        Filesize

        59KB

        MD5

        e9cd337f5a8c2e65b8ac6e27593af184

        SHA1

        f28caa61be74d34334837447cb727559ffc2aeb9

        SHA256

        1eb024838ac5cc347fc5e318e98f69c5866dc102669af8d7ba07b87895e61f64

        SHA512

        18fc6c8152dc9e896e8d44ceb5601ca2844c07d3809b54f017f3279b6282e79e1e93098ce83434742e54fde148f3bdc2d167566de22f2a456f32809445cae1ae

      • memory/988-8-0x0000000000A40000-0x0000000000A56000-memory.dmp

        Filesize

        88KB

      • memory/988-10-0x000007FEF5210000-0x000007FEF5BFC000-memory.dmp

        Filesize

        9.9MB

      • memory/988-69-0x000007FEF5210000-0x000007FEF5BFC000-memory.dmp

        Filesize

        9.9MB

      • memory/988-962-0x000007FEF5210000-0x000007FEF5BFC000-memory.dmp

        Filesize

        9.9MB

      • memory/2120-0-0x000007FEF5213000-0x000007FEF5214000-memory.dmp

        Filesize

        4KB

      • memory/2120-1-0x0000000001080000-0x0000000001096000-memory.dmp

        Filesize

        88KB

      • memory/2120-2-0x000007FEF5213000-0x000007FEF5214000-memory.dmp

        Filesize

        4KB