Analysis

  • max time kernel
    136s
  • max time network
    134s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-07-2024 18:36

General

  • Target

    2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe

  • Size

    39KB

  • MD5

    a6f55eb63c97d4099876dcbe3e2e007a

  • SHA1

    4f554f5bf5381285c5fd9199107ff91aa42798ab

  • SHA256

    3c19762ef8551c8f97ebac5fc0b5d37023286c96c3e70a18840bd86fa3800d14

  • SHA512

    7637b96c1ce28619af005d4d012968953f6d1fc7c81f7444557a33d86e7081c3d0aa9919cb6ae95fcf1febabaf5feae5ca7ad5d002c4901ede9bf93dbc212818

  • SSDEEP

    768:hqo2WM71np65YAHMDr9gzPHSDqfTyPPDdXOyT1/WwrwgceeU:ko2WMKCAHMDr9gzaDNPPDdXb/YgheU

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 3 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 48 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\2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-07-01_a6f55eb63c97d4099876dcbe3e2e007a_destroyer_wannacry.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1248
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.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:2340
      • 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:4008
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:64
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4348
      • 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:2268
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:4928
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:4276
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2596
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1244
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\lol.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:3944
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2424
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2248
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2580
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:4448

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      39KB

      MD5

      a6f55eb63c97d4099876dcbe3e2e007a

      SHA1

      4f554f5bf5381285c5fd9199107ff91aa42798ab

      SHA256

      3c19762ef8551c8f97ebac5fc0b5d37023286c96c3e70a18840bd86fa3800d14

      SHA512

      7637b96c1ce28619af005d4d012968953f6d1fc7c81f7444557a33d86e7081c3d0aa9919cb6ae95fcf1febabaf5feae5ca7ad5d002c4901ede9bf93dbc212818

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

      Filesize

      55B

      MD5

      d49031810fc87f72297762dd70e14a66

      SHA1

      1eea7d9acfcd5c1ffc4fb68413424a87ec7756de

      SHA256

      b6481a1305eb2633d7a73e81b20eaf4184eb614632c5780e5517531804cc54e3

      SHA512

      e24ac495ce8cd4c05dc6a50d799abc7c2911ce50b54cee7e49831f7fa8454aa3f79ddd404cc3623b5340802abb57dda7451059b8ad3d2989d3746a7195932a5b

    • memory/1248-0-0x0000000000570000-0x0000000000580000-memory.dmp

      Filesize

      64KB

    • memory/1248-1-0x00007FFA9CB13000-0x00007FFA9CB15000-memory.dmp

      Filesize

      8KB

    • memory/2340-14-0x00007FFA9CB10000-0x00007FFA9D5D1000-memory.dmp

      Filesize

      10.8MB

    • memory/2340-484-0x00007FFA9CB10000-0x00007FFA9D5D1000-memory.dmp

      Filesize

      10.8MB