Analysis

  • max time kernel
    120s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    25-12-2024 17:01

General

  • Target

    RansomewareBuilder.exe

  • Size

    5.4MB

  • MD5

    e326e0bb654c0c28d1683c3f740e9a9d

  • SHA1

    9c1cbd909ab5897532c11be445cf8384f71ee9b7

  • SHA256

    aad594c4d58ad64350c4e9b4314dcf7fa5b8bb70eb41b0d20f6a0c49a058086c

  • SHA512

    86c01e92a90ee6573e2f0e384191f0b4ee56ddb92ad9bd8023cbf86a4566d999d56e186eacdfc0ce6f0bb3c4960def13beacb067444a1a229ad7d58d81ba5f91

  • SSDEEP

    49152:NuKIx29kk3sN2rEt/U964aKjSEvoYY+A2N:

Malware Config

Extracted

Path

C:\ProgramData\Adobe\Updater6\read_it.txt

Ransom Note
~~~ RdpLocker Recode the world's fastest ransomware~ ~ ~ >>>> Your data are stolen and encrypted >>>> Info Our encryption is undetectable and we can encrypt terabytes of data in minutes. A unique public and private key is generated exclusively for you. No one else can decrypt the files we have encrypted. Our services are cheap and reliable. >>>> What guarantees that we will not deceive you? We are not a politically motivated group and we do not need anything other than your money. If you pay, we will provide you the programs for decryption and we will delete your data. If we do not give you decrypters, or we do not delete your data after payment, then nobody will pay us in the future. Therefore to us our reputation is very important. We attack the companies worldwide and there is no dissatisfied victim after payment. You can contact us using Tox messenger without registration and SMS to negotiate the price. https://tox.chat/download.html Using Tox messenger, we will never know your real name, it means your privacy is guaranteed. Raven Tox ID: 25547C7BB6441FDFBB3BEEB09CC1EE3FF5B2A0389F6739A3DDA6948E464B611D7C885232644B
URLs

https://tox.chat/download.html

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Chaos family
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (198) 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 3 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
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 3 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 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 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\RansomewareBuilder.exe
    "C:\Users\Admin\AppData\Local\Temp\RansomewareBuilder.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3056
    • 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)
      • Sets desktop wallpaper using registry
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:776
      • 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:2880
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2244
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2684
      • 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:1340
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:680
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:900
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1020
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2924
      • 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:2028
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2840
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:768
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2816
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2356

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        1KB

        MD5

        989c56f4275e6e04986ce8d7557519b4

        SHA1

        4e291831db153b00f3a8829a633fdbbe43cf9838

        SHA256

        169545482fca28799ea6fb239991d8e6dbee49e22efa25c81d5240fe5252ebf6

        SHA512

        37f3ee52a840b7b5ab53e515400f7d888c794640c0d327f224ae921dcfd5cc537b10de6d34e944e0a0460e518d4e721a92a417fed2824ab77533e8048ce1383d

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

        Filesize

        5.4MB

        MD5

        e326e0bb654c0c28d1683c3f740e9a9d

        SHA1

        9c1cbd909ab5897532c11be445cf8384f71ee9b7

        SHA256

        aad594c4d58ad64350c4e9b4314dcf7fa5b8bb70eb41b0d20f6a0c49a058086c

        SHA512

        86c01e92a90ee6573e2f0e384191f0b4ee56ddb92ad9bd8023cbf86a4566d999d56e186eacdfc0ce6f0bb3c4960def13beacb067444a1a229ad7d58d81ba5f91

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/776-9-0x000007FEF58B0000-0x000007FEF629C000-memory.dmp

        Filesize

        9.9MB

      • memory/776-10-0x0000000001010000-0x000000000157E000-memory.dmp

        Filesize

        5.4MB

      • memory/776-11-0x000007FEF58B0000-0x000007FEF629C000-memory.dmp

        Filesize

        9.9MB

      • memory/776-993-0x000007FEF58B0000-0x000007FEF629C000-memory.dmp

        Filesize

        9.9MB

      • memory/3056-0-0x000007FEF58B3000-0x000007FEF58B4000-memory.dmp

        Filesize

        4KB

      • memory/3056-1-0x0000000000970000-0x0000000000EDE000-memory.dmp

        Filesize

        5.4MB

      • memory/3056-2-0x000007FEF58B0000-0x000007FEF629C000-memory.dmp

        Filesize

        9.9MB

      • memory/3056-8-0x000007FEF58B0000-0x000007FEF629C000-memory.dmp

        Filesize

        9.9MB