Analysis

  • max time kernel
    121s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    10-05-2024 00:47

General

  • Target

    2024-05-10_a87448407f580aca26856668b1421ca3_destroyer_wannacry.exe

  • Size

    27KB

  • MD5

    a87448407f580aca26856668b1421ca3

  • SHA1

    ea453ed748d7b59f27e6ccbe7a3c47982b8d831a

  • SHA256

    018699d7f48805c5eec9236d386c71883a3bb78cc29eec6a354784547672c267

  • SHA512

    9e0e24f0aef6aaf7a13cbb646084484f7eaf80f83eb2390e3764cd28982ec5d4148291e14c617f6fe38fe2eb5f8dbae3a45770a7d0919860d09c582e02743233

  • SSDEEP

    384:QtWZPzzxAm1vqD8Sks4grPiEDNBYfpQlQ/xsV7LlJqGNl8Oy5o91oc882vy:l7zxAmu8Sn4LEZVqDho9aP826

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.

  • 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 (170) 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 5 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\2024-05-10_a87448407f580aca26856668b1421ca3_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-10_a87448407f580aca26856668b1421ca3_destroyer_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1384
    • 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:2356
      • 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:2760
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2684
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2444
      • 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:1924
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1664
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2520
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1672
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2712
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\unlock.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:2140
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2780
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:764
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1436
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1756

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        484B

        MD5

        19c0d8b1825404eeeb36aba59ad88a6b

        SHA1

        5b9e2eb1f8ceaa14af46733b64d568aeacd96380

        SHA256

        d1cc4594d393c62ebe735dde25d60b49501a99447b7bc2329f6d94c9a942c56c

        SHA512

        9700451a730dc67bc1e2284f9e082e467b5a2bcb9f54d4446368b02edf8809de1a8ce3d43a14fbcdb91adbdca23bfaf64f7b0053552844068ec96f5ee8f0965d

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

        Filesize

        27KB

        MD5

        a87448407f580aca26856668b1421ca3

        SHA1

        ea453ed748d7b59f27e6ccbe7a3c47982b8d831a

        SHA256

        018699d7f48805c5eec9236d386c71883a3bb78cc29eec6a354784547672c267

        SHA512

        9e0e24f0aef6aaf7a13cbb646084484f7eaf80f83eb2390e3764cd28982ec5d4148291e14c617f6fe38fe2eb5f8dbae3a45770a7d0919860d09c582e02743233

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/1384-0-0x000007FEF5B03000-0x000007FEF5B04000-memory.dmp

        Filesize

        4KB

      • memory/1384-1-0x0000000000B80000-0x0000000000B8E000-memory.dmp

        Filesize

        56KB

      • memory/1384-3-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

        Filesize

        9.9MB

      • memory/1384-10-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

        Filesize

        9.9MB

      • memory/2356-8-0x0000000000270000-0x000000000027E000-memory.dmp

        Filesize

        56KB

      • memory/2356-9-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

        Filesize

        9.9MB

      • memory/2356-11-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

        Filesize

        9.9MB

      • memory/2356-877-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

        Filesize

        9.9MB