Resubmissions

20-06-2024 08:48

240620-kqtzqsydnc 10

08-04-2024 07:35

240408-jer6bsfc6w 10

Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    20-06-2024 08:48

General

  • Target

    2024-04-08_bc7d2982cf93e751f42e42e649856949_wannacry.exe

  • Size

    435KB

  • MD5

    bc7d2982cf93e751f42e42e649856949

  • SHA1

    5d760bf9bacdd2dbb77c1c31af142025fe8a1a91

  • SHA256

    88003a5d7e92939d923369ef7d7a9d54230dd8aa1e97760a04df75b89aa62126

  • SHA512

    610c05f78f380c1875160d76ec08e5c5b5cf37c17c759ff51fdfa86dc0191e88c7e174789450f754c469476afdfeb45d4cc4ed6ba17e52b39ad3b2faaaad2524

  • SSDEEP

    12288:34J5PLJED4FtD2IOyd0K5Qzpi/MhHvFOHHHRw3+Ue70VkF33T8Wx355N:3QWOYKAJqnxLH

Malware Config

Extracted

Path

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

Ransom Note
If you are opportune to see this message right now, that means your data security has been compromised !!! You have been hit hard by a sophisticated Ransomware Attack by CROCODILE SMILE, LOL. This Attack is known as OPERATION FLUSH. All your critical and confidential files, including private documents, photos, databases, and other important informations, have been encrypted, leaked, and transferred to our servers. In accordance with European data protection regulations, we are reaching out to inform you of this breach and to offer assistance in recovering your encrypted files. We acknowledge the gravity of the situation and are fully dedicated to swiftly delivering a solution. Our priority is to safeguard your organization's reputation and ensure the confidentiality of your files and documents remains intact, free from any leaks or compromises. To initiate the decryption process and retrieve your files, please follow these official steps: 1) Contact our designated communication channel via Telegram ID: CrocodileSmile 2) Make the necessary arrangements to obtain 20.6 Bitcoin, as payment for the decryption service. Please note that decryption can only be completed upon receipt of payment in Bitcoins. 3) Upon successful payment, we will provide you with the decryption key required to swiftly decrypt all affected files. We assure you that compliance with these instructions is crucial for the recovery of your data. We urge you to act swiftly to mitigate further data loss and restore the integrity of your information assets. Should you require any clarification or assistance, do not hesitate to contact us through the designated communication channel.

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • 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 (180) 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 2 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 1 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\2024-04-08_bc7d2982cf93e751f42e42e649856949_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-08_bc7d2982cf93e751f42e42e649856949_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2976
    • 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:2256
      • 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:2736
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1428
      • 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:2960
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2268
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2180
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1768
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2764
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ_SOLUTION.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:2492
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2080
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1936
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1536
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1448
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\New folder\READ_SOLUTION.txt
        1⤵
          PID:2224
        • C:\Windows\system32\NOTEPAD.EXE
          "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\READ_SOLUTION.txt
          1⤵
            PID:1204

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

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

            Filesize

            1KB

            MD5

            faba0e52e452fb256d3901b8ec1df56c

            SHA1

            a38022b53fdec72d447793ca584141b32c87f1a9

            SHA256

            1403f8a01c4359367cc06a63e2c382146f7cf8f297cf9d66b325f54823105fd2

            SHA512

            849a08ea30209c17c4dcd34521af2c27e4d062f4b6736c0418dce0c3f04de08f90cae36e433a87186bf0bf257a943e57685cc285b6d2171daf48e35e9a5fa737

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

            Filesize

            435KB

            MD5

            bc7d2982cf93e751f42e42e649856949

            SHA1

            5d760bf9bacdd2dbb77c1c31af142025fe8a1a91

            SHA256

            88003a5d7e92939d923369ef7d7a9d54230dd8aa1e97760a04df75b89aa62126

            SHA512

            610c05f78f380c1875160d76ec08e5c5b5cf37c17c759ff51fdfa86dc0191e88c7e174789450f754c469476afdfeb45d4cc4ed6ba17e52b39ad3b2faaaad2524

          • C:\Users\Admin\Desktop\PingStart.contact

            Filesize

            1B

            MD5

            d1457b72c3fb323a2671125aef3eab5d

            SHA1

            5bab61eb53176449e25c2c82f172b82cb13ffb9d

            SHA256

            8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

            SHA512

            ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

          • memory/2256-10-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

            Filesize

            9.9MB

          • memory/2256-8-0x00000000010A0000-0x0000000001114000-memory.dmp

            Filesize

            464KB

          • memory/2256-11-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

            Filesize

            9.9MB

          • memory/2256-918-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

            Filesize

            9.9MB

          • memory/2976-0-0x000007FEF5BD3000-0x000007FEF5BD4000-memory.dmp

            Filesize

            4KB

          • memory/2976-1-0x0000000000100000-0x0000000000174000-memory.dmp

            Filesize

            464KB

          • memory/2976-3-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

            Filesize

            9.9MB

          • memory/2976-9-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

            Filesize

            9.9MB