Analysis

  • max time kernel
    76s
  • max time network
    93s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-03-2024 04:49

Errors

Reason
Machine shutdown

General

  • Target

    ransomwares/Annabelle/Annabelle.exe

  • Size

    15.9MB

  • MD5

    0f743287c9911b4b1c726c7c7edcaf7d

  • SHA1

    9760579e73095455fcbaddfe1e7e98a2bb28bfe0

  • SHA256

    716335ba5cd1e7186c40295b199190e2b6655e48f1c1cbe12139ba67faa5e1ac

  • SHA512

    2a6dd6288303700ef9cb06ae1efeb1e121c89c97708e5ecd15ed9b2a35d0ecff03d8da58b30daeadad89bd38dc4649521ada149fb457408e5a2bdf1512f88677

  • SSDEEP

    393216:UMwm0qBknxdEX+LbMUgoSZmWSmh4aaRN22ChHCMNku1y:UMcKX+Lbjgd7W1RNVC9ku1

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies Windows Defender Real-time Protection settings 3 TTPs 2 IoCs
  • UAC bypass 3 TTPs 1 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Disables RegEdit via registry modification 2 IoCs
  • Disables Task Manager via registry modification
  • Disables use of System Restore points 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets file execution options in registry 2 TTPs 64 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Interacts with shadow copies 2 TTPs 3 IoCs

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

  • Modifies data under HKEY_USERS 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • System policy modification 1 TTPs 9 IoCs
  • 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\ransomwares\Annabelle\Annabelle.exe
    "C:\Users\Admin\AppData\Local\Temp\ransomwares\Annabelle\Annabelle.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Modifies Windows Defender Real-time Protection settings
    • UAC bypass
    • Disables RegEdit via registry modification
    • Sets file execution options in registry
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4020
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1936
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:4696
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:2536
    • C:\Windows\SYSTEM32\NetSh.exe
      NetSh Advfirewall set allprofiles state off
      2⤵
      • Modifies Windows Firewall
      PID:4496
    • C:\Windows\System32\shutdown.exe
      "C:\Windows\System32\shutdown.exe" -r -t 00 -f
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4164
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1424 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2940
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:748
    • C:\Windows\system32\LogonUI.exe
      "LogonUI.exe" /flags:0x4 /state0:0xa3943055 /state1:0x41c64e6d
      1⤵
      • Modifies data under HKEY_USERS
      • Suspicious use of SetWindowsHookEx
      PID:4408

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/4020-0-0x0000020FD4E50000-0x0000020FD5E44000-memory.dmp

      Filesize

      16.0MB

    • memory/4020-1-0x00007FFAE3000000-0x00007FFAE3AC1000-memory.dmp

      Filesize

      10.8MB

    • memory/4020-2-0x0000020FF0550000-0x0000020FF1ADE000-memory.dmp

      Filesize

      21.6MB

    • memory/4020-3-0x0000020FD6250000-0x0000020FD6260000-memory.dmp

      Filesize

      64KB

    • memory/4020-4-0x00007FFAE3000000-0x00007FFAE3AC1000-memory.dmp

      Filesize

      10.8MB

    • memory/4020-134-0x0000020FD6250000-0x0000020FD6260000-memory.dmp

      Filesize

      64KB

    • memory/4020-160-0x00007FFAE3000000-0x00007FFAE3AC1000-memory.dmp

      Filesize

      10.8MB