Overview

overview

10

Static

static

10

2026-10-02...op.exe

windows10-2004-x64

10

2026-10-02...op.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    02/10/2026, 22:53

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General

  • Target
    2026-10-02_f054f2bc0116e73a4db1b39ec66cad74_elex_makop.exe
  • Size 49KB
  • Sample261002-2t2mesxvht
  • SHA256 73ff29363a7f3b4aa85ea77bbf56ace59deec0b7ba0efb6c39a5151d8e4bd993
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defense_evasiondiscoveryexecutionmakopimpactpersistenceransomware

Malware Config

Extracted

Path

  • C:\Program Files\7-Zip\+README-WARNING+.txt

  • makop

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

  • Family: Makop

    Ransomware family discovered by @VK_Intel in early 2020.

    ransomwaremakop
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Renames multiple (3666) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

    ransomware
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in System32 directory 8 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

    discovery
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Interacts with shadow copies 3 TTPs 1 IoCs

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

    ransomware
  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 4 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.

    persistence
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-10-02_f054f2bc0116e73a4db1b39ec66cad74_elex_makop.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-10-02_f054f2bc0116e73a4db1b39ec66cad74_elex_makop.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3840
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1780
      • C:\Windows\system32\vssadmin.exe
        vssadmin delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2304
      • C:\Windows\system32\wbadmin.exe
        wbadmin delete catalog -quiet
        3⤵
        • Deletes backup catalog
        PID:1532
      • C:\Windows\System32\Wbem\WMIC.exe
        wmic shadowcopy delete
        3⤵
        • Reads the TCP/IP host and domain name from the registry
        • Suspicious use of AdjustPrivilegeToken
        PID:1988
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:672
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2416
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:740
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2776
    • C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe
      "C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service
      1⤵
      • Drops file in System32 directory
      • Checks processor information in registry
      • Enumerates system info in registry
      • Modifies data under HKEY_USERS
      • Suspicious use of SetWindowsHookEx
      PID:1948

    Network

          MITRE ATT&CK Enterprise v16

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          Downloads

          +README-WARNING+.txt
          • Path C:\Program Files\7-Zip\+README-WARNING+.txt
          • Size 1KB
          • SHA256 6df6782ffc5dd8e5bdae805f8afc4a455489803efee6dd5713e03822f5b15554
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          classes.jsa.[4DA91AAC].[[email protected]].mkp
          • Path C:\Program Files\Java\jdk-1.8\jre\bin\server\classes.jsa.[4DA91AAC].[[email protected]].mkp
          • Size 18.8MB
          • SHA256 7023dbeceb5601c49031b6927e8c550cff6546fc0ecd5af1b19bcf160be66d6a
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          classes.jsa.[4DA91AAC].[[email protected]].mkp
          • Path C:\Program Files\Java\jre-1.8\bin\server\classes.jsa.[4DA91AAC].[[email protected]].mkp
          • Size 18.3MB
          • SHA256 bbaaea5ff522369fd6029107b12b1f24ce81bd28f66863a61e8d1d73904d161f
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download