Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows11-21h2_x64
  • resource
    win11-20251231-en
  • resource tags

    arch:x64arch:x86image:win11-20251231-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    10/01/2026, 02:28

General

  • Target
    2026-01-10_4e1e2f5debe2ba60e3ea38dabf95200a_conti.exe
  • Size 357KB
  • Sample260110-cydnqabv8a
  • SHA256 0d693df400e0d34b206cbfa8ce1d7ce1180557aad022c13c3ea0ca274ffb92b7
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Babuk Locker

    RaaS first seen in 2021 initially called Vasa Locker.

  • Babuk family
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (2224) files with added filename extension

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

  • Credentials from Password Stores: Windows Credential Manager 1 TTPs

    Suspicious access to Credentials History.

  • Drops startup file 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks processor information in registry 2 TTPs 4 IoCs

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

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

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

  • Modifies registry class 29 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs
  • 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\2026-01-10_4e1e2f5debe2ba60e3ea38dabf95200a_conti.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-01-10_4e1e2f5debe2ba60e3ea38dabf95200a_conti.exe"
    1⤵
    • Drops startup file
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: RenamesItself
    • Suspicious use of WriteProcessMemory
    PID:5356
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5544
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:5844
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:6116
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Checks processor information in registry
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:3984
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
    1⤵
    • Enumerates system info in registry
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2540

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        StartUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat
        • Size 26KB
        • SHA256 72d3d3be5a1fb841070b9a3a00792b5efa3946d663e1fab31dd80c847cf40919
        • MD5 SHA1 SHA512 SSDEEP TLSH

        StartUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat
        • Size 32KB
        • SHA256 55fee5bd4e17f9e44bed19af23e162583ef2ddb52637a6cd21efebd2faa31703
        • MD5 SHA1 SHA512 SSDEEP TLSH

        StartUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat
        • Size 32KB
        • SHA256 cf03ab476b9980298ffe7d4b9b434d54c965a8f5dd6dbcf45a05a0b4698ad10b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        www.bing[1].xml

        • Path C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\P0C739MW\www.bing[1].xml
        • Size 96B
        • SHA256 82a2c683acaccab6b73e71341a54cd3c33c80b8ec0295d78889a6ed368748e81
        • MD5 SHA1 SHA512 TLSH

        SearchUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchUnifiedTileModelCache.dat
        • Size 28KB
        • SHA256 9e19b31f4c52c2fbe95e4a095e050abb3ebe2cf5ad7484242a0e9e888f8f591d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        SearchUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchUnifiedTileModelCache.dat
        • Size 28KB
        • SHA256 ceef1e5e59b4a1bd5c9566abfc09f0ab67f46420c3b9821627caef7562c15d2a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Como restaurar seus arquivos.txt

        • Path F:\Como restaurar seus arquivos.txt
        • Size 1KB
        • SHA256 8395d7bad7ba2adc14d41fcc899ca7d92de2b5f59b1f61700531a13b3f44f27f
        • MD5 SHA1 SHA512 TLSH

        memory/2540-1592-0x000002233E600000-0x000002233E700000-memory.dmp

        memory/2540-1663-0x0000022462A70000-0x0000022462A90000-memory.dmp

        memory/2540-1640-0x0000022361F00000-0x0000022361F20000-memory.dmp

        memory/2540-1639-0x0000022462600000-0x0000022462620000-memory.dmp

        memory/2540-1638-0x00000223616B0000-0x00000223617B0000-memory.dmp

        memory/2540-1612-0x0000022361F60000-0x0000022361F80000-memory.dmp

        memory/2540-1810-0x00000224637B0000-0x00000224637D0000-memory.dmp

        memory/2540-1562-0x000002233E720000-0x000002233E820000-memory.dmp

        memory/3984-1514-0x00000177F1570000-0x00000177F1571000-memory.dmp

        memory/3984-1510-0x00000177F1570000-0x00000177F1571000-memory.dmp

        memory/3984-1511-0x00000177F1570000-0x00000177F1571000-memory.dmp

        memory/3984-1512-0x00000177F1570000-0x00000177F1571000-memory.dmp

        memory/3984-1513-0x00000177F1570000-0x00000177F1571000-memory.dmp

        memory/3984-1515-0x00000177F1570000-0x00000177F1571000-memory.dmp

        memory/3984-1516-0x00000177F1570000-0x00000177F1571000-memory.dmp

        memory/3984-1504-0x00000177F1570000-0x00000177F1571000-memory.dmp

        memory/3984-1505-0x00000177F1570000-0x00000177F1571000-memory.dmp

        memory/3984-1506-0x00000177F1570000-0x00000177F1571000-memory.dmp

        memory/5356-63-0x00007FF683830000-0x00007FF683883000-memory.dmp