Windows 7 deprecation

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Analysis

  • max time kernel
    146s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    03/02/2024, 17:09

General

  • Target

    681489e93c845e475a4ff0878a9244e9a1519668ecdffbe46507c9f3cfb20c1e.exe

  • Size

    42KB

  • MD5

    0ae0e189bbe1e33cc08e905ab98b0a69

  • SHA1

    140ab08c71a4e1014f132ffae4428cbafcd7b8ad

  • SHA256

    681489e93c845e475a4ff0878a9244e9a1519668ecdffbe46507c9f3cfb20c1e

  • SHA512

    5a7c567926bc24aab379b1ad1dfa866e992f4df39195165c8fb4941b8aada8cb1043ca7b7568051e29035c4473555345959477876f24d675555220b6aca52479

  • SSDEEP

    768:EO1oR/DVS1RzK4wbs+D/SIJX+ZZ1SQQwVTIOPzDq1xTq3ZQJtCQ:EBS1FKnDtmTImq+3ZQX

Score
10/10

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\+README-WARNING+.txt

Ransom Note
::: Greetings ::: Little FAQ: .1. Q: Whats Happen? A: Your files have been encrypted. The file structure was not damaged, we did everything possible so that this could not happen. .2. Q: How to recover files? A: If you wish to decrypt your files you will need to pay us. .3. Q: What about guarantees? A: Its just a business. We absolutely do not care about you and your deals, except getting benefits. If we do not do our work and liabilities - nobody will cooperate with us. Its not in our interests. To check the ability of returning files, you can send to us any 2 files with SIMPLE extensions(jpg,xls,doc, etc... not databases!) and low sizes(max 1 mb), we will decrypt them and send back to you. That is our guarantee. .4. Q: How to contact with you? A: You can write us to our mailboxes: [email protected] or [email protected] .5. Q: How will the decryption process proceed after payment? A: After payment we will send to you our scanner-decoder program and detailed instructions for use. With this program you will be able to decrypt all your encrypted files. .6. Q: If I don�t want to pay bad people like you? A: If you will not cooperate with our service - for us, its does not matter. But you will lose your time and data, cause only we have the private key. In practice - time is much more valuable than money. :::BEWARE::: DON'T try to change encrypted files by yourself! If you will try to use any third party software for restoring your data or antivirus solutions - please make a backup for all encrypted files! Any changes in encrypted files may entail damage of the private key and, as result, the loss all data.

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (7555) 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.

  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of WriteProcessMemory 13 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\681489e93c845e475a4ff0878a9244e9a1519668ecdffbe46507c9f3cfb20c1e.exe
    "C:\Users\Admin\AppData\Local\Temp\681489e93c845e475a4ff0878a9244e9a1519668ecdffbe46507c9f3cfb20c1e.exe"
    1⤵
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:760
    • C:\Users\Admin\AppData\Local\Temp\681489e93c845e475a4ff0878a9244e9a1519668ecdffbe46507c9f3cfb20c1e.exe
      "C:\Users\Admin\AppData\Local\Temp\681489e93c845e475a4ff0878a9244e9a1519668ecdffbe46507c9f3cfb20c1e.exe" n760
      2⤵
        PID:2628
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2520
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:2264
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          3⤵
          • Deletes backup catalog
          PID:2720
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:324
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2260
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2564
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:2244
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
          PID:2372
        • C:\Windows\system32\Dwm.exe
          "C:\Windows\system32\Dwm.exe"
          1⤵
            PID:2928

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\+README-WARNING+.txt

            Filesize

            1KB

            MD5

            188a9a72e507cbbbc03dd35d3540958c

            SHA1

            7faa9360d11290cadabc0beceaec5eb76c489343

            SHA256

            9cbbebceb3bd201e96418d93d2e48cbcb302dc56499b5fc2b6f5ce33ff60cd7e

            SHA512

            375dd83f5a6b195d02e5e58b9ef4e6e82903cbce4be1181ef64a0b215c2e4c5873705672b869feed20c209e8926034d84e51a3bb491f2c196f373895a551eff2