Analysis

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

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    27/03/2025, 04:49

General

  • Target

    Ransomware.exe

  • Size

    77KB

  • MD5

    559b0d30b7bbf2d514c01e275fadbc90

  • SHA1

    25f2a1d11717d9127ced536d89caeb0c54edad26

  • SHA256

    d196d67dbaa312f08d963d404d4237eed1cbb708168f732893dbf91d85d3d493

  • SHA512

    ac3e6b24416812f2cdf54f1131d5235ce47481bd5336029f6ff1dd4b292eba33d1c33c07949c0f197166bc438fad66a773aebc989d31a4d65d2c86e449d89727

  • SSDEEP

    1536:5Ni6hsq9licc1/auzQX3unCfjiKG19ukYlUSaL7TOiwjJ:uisq9l/cVMTi1skYlURPR6J

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\SPECTRARANSOMWARE.txt

Ransom Note
CONFIDENTIAL AND URGENT To the Management and IT Department of your company, You are now faced with a critical situation. Your company's digital assets, including sensitive data, financial records, and intellectual property, have been compromised. Our group has successfully infiltrated your network, exploiting vulnerabilities that your security measures failed to address. As a result, we have encrypted all accessible data, rendering it inaccessible to your organization. The encryption method used is highly sophisticated, and decryption without our provided key is virtually impossible. Your attempts to restore from backups will be futile, as we have also compromised your backup systems. The following data has been encrypted and is currently being held for ransom: Financial records, including invoices, payments, and accounting data Sensitive customer information, including personal identifiable data Proprietary software and intellectual property Email communications and internal memos Database files, including SQL and NoSQL data We are willing to provide the decryption key in exchange for a payment of $5000 in Bitcoin. This amount is non-negotiable, and any attempts to bargain or delay payment will result in the permanent deletion of your data. You have 72 hours to comply with our demands. Failure to pay the ransom within the specified timeframe will result in: 1. Permanent deletion of your encrypted data 2. Public release of sensitive customer information 3. Disclosure of your company's security vulnerabilities to the public and competitors 4. Initiation of a targeted attack on your remaining infrastructure To facilitate the payment process, we have provided a Bitcoin wallet address below: bc1q88r38gk8ynrhdfur7yefwf5hrn2y56s90vlrvq Once the payment is confirmed, we will provide the decryption key and instructions on how to restore your data. Please note that any attempts to involve law enforcement or cybersecurity firms will be detected, and we will take immediate action to destroy your data. You are advised to take this situation seriously and act promptly to avoid any further consequences. We are monitoring your company's activities closely and will respond accordingly. DO NOT IGNORE THIS MESSAGE Your company's future depends on your prompt response to this situation. We expect your cooperation and payment within the specified timeframe. Sincerely, Spectra Ransomware

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
  • 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 FindShellTrayWindow 1 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\Ransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\Ransomware.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2208
    • 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:2112
      • 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:2812
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2756
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1412
      • 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:2472
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1080
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1936
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2056
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1340
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\SPECTRARANSOMWARE.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        • Suspicious use of FindShellTrayWindow
        PID:2024
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2584
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:764
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:444
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2084

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\SPECTRARANSOMWARE.txt

        Filesize

        2KB

        MD5

        4203f97be5cb713003dbf23a880f5eaa

        SHA1

        4c2484d42cf32442f54df672a352596c88350d01

        SHA256

        da85ae8957301fd1095c9a52b2d6a6e43b24393696f99dc359440a726fe33eb1

        SHA512

        4041df6a662ad9915bc5e0f038fda046954c16b703975e4b2d8a4ec10db0b39ed08d6d12c91b13ad1e5a40e836a7806e7b060355b4ec3b11822ab93f46be0212

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

        Filesize

        77KB

        MD5

        559b0d30b7bbf2d514c01e275fadbc90

        SHA1

        25f2a1d11717d9127ced536d89caeb0c54edad26

        SHA256

        d196d67dbaa312f08d963d404d4237eed1cbb708168f732893dbf91d85d3d493

        SHA512

        ac3e6b24416812f2cdf54f1131d5235ce47481bd5336029f6ff1dd4b292eba33d1c33c07949c0f197166bc438fad66a773aebc989d31a4d65d2c86e449d89727

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2112-9-0x0000000000BE0000-0x0000000000BFA000-memory.dmp

        Filesize

        104KB

      • memory/2112-10-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp

        Filesize

        9.9MB

      • memory/2112-11-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp

        Filesize

        9.9MB

      • memory/2112-1054-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp

        Filesize

        9.9MB

      • memory/2208-0-0x000007FEF5063000-0x000007FEF5064000-memory.dmp

        Filesize

        4KB

      • memory/2208-1-0x0000000000DE0000-0x0000000000DFA000-memory.dmp

        Filesize

        104KB

      • memory/2208-2-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp

        Filesize

        9.9MB

      • memory/2208-8-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp

        Filesize

        9.9MB