Analysis

  • max time kernel
    140s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-02-2024 11:25

General

  • Target

    2024-02-17_22c442d48aa7c9f9d35eecd0666dea14_wannacry.exe

  • Size

    317KB

  • MD5

    22c442d48aa7c9f9d35eecd0666dea14

  • SHA1

    a1fdc523787aa5c068613867d0b6c27ee40b70e1

  • SHA256

    8d20fefdcc204570b0d19b26fd99553ea89697b3646073b769466aa8ac5fc730

  • SHA512

    1d8705708afeccaaaf467d6466d0dbaa6097b2942c7b45c548175c17b771182e89c7557175b8d830ae9e721471aad20ce0902d6861ab3bb9c35a1cf334f2a308

  • SSDEEP

    1536:Ho2jYNMNXr9MaAQ/e9rh12xwpUlwhNNxI5/fbBIGbtGutFnL5iU66tDwU1yw+TN+:HojMNXr9MaAQ/eH6wp2wjW/jIIv

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • Deletes shadow copies 2 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 52 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\2024-02-17_22c442d48aa7c9f9d35eecd0666dea14_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-17_22c442d48aa7c9f9d35eecd0666dea14_wannacry.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5096
    • C:\Users\Admin\AppData\Roaming\tikcp.exe
      "C:\Users\Admin\AppData\Roaming\tikcp.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:2672
      • 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:2416
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:3832
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3884
      • 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:5028
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1956
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2140
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3292
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2876
      • 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:3712
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:336
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4628
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:4768
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2784

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      317KB

      MD5

      22c442d48aa7c9f9d35eecd0666dea14

      SHA1

      a1fdc523787aa5c068613867d0b6c27ee40b70e1

      SHA256

      8d20fefdcc204570b0d19b26fd99553ea89697b3646073b769466aa8ac5fc730

      SHA512

      1d8705708afeccaaaf467d6466d0dbaa6097b2942c7b45c548175c17b771182e89c7557175b8d830ae9e721471aad20ce0902d6861ab3bb9c35a1cf334f2a308

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

      Filesize

      729B

      MD5

      6307522e98de22e159d4f7e943a92c20

      SHA1

      788a9f81a924b60246ebb96b13aaf9df53e4a5ba

      SHA256

      a77f348ad194923a42d74f5b8e225ddf713b4d651d228638f8379d1aa1a37379

      SHA512

      59354eaf95a8af38366afa5e16379e901ef6bc391119bd14385249dbda1cec789ccb93e220b0ac9d3af11eefea555d13a4bb1321c68489c7997f78788244faae

    • memory/2672-15-0x00007FF8D22C0000-0x00007FF8D2D81000-memory.dmp

      Filesize

      10.8MB

    • memory/2672-17-0x000000001BA20000-0x000000001BA30000-memory.dmp

      Filesize

      64KB

    • memory/2672-459-0x00007FF8D22C0000-0x00007FF8D2D81000-memory.dmp

      Filesize

      10.8MB

    • memory/2672-460-0x000000001BA20000-0x000000001BA30000-memory.dmp

      Filesize

      64KB

    • memory/5096-0-0x0000000000C30000-0x0000000000C84000-memory.dmp

      Filesize

      336KB

    • memory/5096-1-0x00007FF8D22C0000-0x00007FF8D2D81000-memory.dmp

      Filesize

      10.8MB

    • memory/5096-14-0x00007FF8D22C0000-0x00007FF8D2D81000-memory.dmp

      Filesize

      10.8MB