Analysis

  • max time kernel
    140s
  • max time network
    106s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-05-2024 17:26

General

  • Target

    2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe

  • Size

    43KB

  • MD5

    5a493651ebb3bfd33efff93951a1c39e

  • SHA1

    e3a5f99912ecae3059d4aaf0a337773a8c591d3c

  • SHA256

    e1319577144e33e76755ce24657a28b4bbbe2809fb2917590cc786f1b1293394

  • SHA512

    0adab6a1a1583dc1f05da8fe5e178e3ca4d569865a94776e281d6e2751645e2275a8f91551bc13f24f3c0a09b577b682e1f5026837e271ebdbe39f18c93bd69c

  • SSDEEP

    768:qqo2ypUFA4+kR7Fr9NQAkrJHzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz9:xo2h6417Fr9NQAkrJHzzzzzzzzzzzzz9

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Detects command variations typically used by ransomware 2 IoCs
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 3 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.

  • Drops desktop.ini file(s) 34 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).

  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 49 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of WriteProcessMemory 20 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\2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-17_5a493651ebb3bfd33efff93951a1c39e_destroyer_wannacry.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2944
    • C:\Users\Admin\AppData\Roaming\winlogon.exe
      "C:\Users\Admin\AppData\Roaming\winlogon.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Sets desktop wallpaper using registry
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4604
      • 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:532
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2428
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4220
      • 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:928
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2288
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1964
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4460
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:3884
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\bot.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:1252
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3440
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1092
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2592
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2252

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      43KB

      MD5

      5a493651ebb3bfd33efff93951a1c39e

      SHA1

      e3a5f99912ecae3059d4aaf0a337773a8c591d3c

      SHA256

      e1319577144e33e76755ce24657a28b4bbbe2809fb2917590cc786f1b1293394

      SHA512

      0adab6a1a1583dc1f05da8fe5e178e3ca4d569865a94776e281d6e2751645e2275a8f91551bc13f24f3c0a09b577b682e1f5026837e271ebdbe39f18c93bd69c

    • C:\Users\Admin\Documents\bot.txt

      Filesize

      25B

      MD5

      3b21b92f6121f297db717b540fff87b8

      SHA1

      ad154c96bb9fcf9e671a807eb87c2083b9cf03a4

      SHA256

      bbac48b7084c4e86d42c528b568702f8aa0a36b4a64aa99fcdf76901c8ca9cad

      SHA512

      f2eac60dadb0b9b14609d4ae74fb10da354faa39bf0b6c121d2184e5d757275d376585a072b515840339abab95cd50352ebefb6b2746501ea20a3b2109973686

    • memory/2944-0-0x0000000000390000-0x00000000003A2000-memory.dmp

      Filesize

      72KB

    • memory/2944-1-0x00007FF816413000-0x00007FF816415000-memory.dmp

      Filesize

      8KB

    • memory/4604-14-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

      Filesize

      10.8MB

    • memory/4604-22-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

      Filesize

      10.8MB

    • memory/4604-447-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

      Filesize

      10.8MB