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, 02:07

General

  • Target
    2026-01-10_1d6f7f8565c5c5978e3bac65736cdbe0_conti.exe
  • Size 358KB
  • Sample260110-ckbbfaa17h
  • SHA256 81344d0d8040a55e059b0145164039c82159517be492fb75b179b6423aa51419
  • 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 (2384) 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_1d6f7f8565c5c5978e3bac65736cdbe0_conti.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-01-10_1d6f7f8565c5c5978e3bac65736cdbe0_conti.exe"
    1⤵
    • Drops startup file
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: RenamesItself
    • Suspicious use of WriteProcessMemory
    PID:4632
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5016
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:4676
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4112
  • 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:5976
  • 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:1868

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 30KB
        • SHA256 386667c071cfb922879d39948bf1a81c9fee7e92815e74d8d38e039681146f5c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        StartUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat
        • Size 30KB
        • SHA256 c3f7aa18c1fcf2f211531885e150b935fcc4e907fc39dba1c33301d427648071
        • MD5 SHA1 SHA512 SSDEEP TLSH

        StartUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat
        • Size 24KB
        • SHA256 5d944901073e334db8c8419562ba1fce28abb91a17f0a30b841d981e85312b72
        • 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\6LOPTR81\www.bing[1].xml
        • Size 96B
        • SHA256 91c7a2866b32e875ce4127c96450997bf51ca95f41d763adbae71ad24a4a48a9
        • MD5 SHA1 SHA512 TLSH

        SearchUnifiedTileModelCache.dat

        • Path C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchUnifiedTileModelCache.dat
        • Size 27KB
        • SHA256 cb0bcb9cdd4ad32e67e8bf112d32db34cdf0367606b5c2dd898c40db37863092
        • 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/1868-1718-0x00000201F8BE0000-0x00000201F8C00000-memory.dmp

        memory/1868-1783-0x00000201F8A00000-0x00000201F8B00000-memory.dmp

        memory/1868-1903-0x00000202F9D20000-0x00000202F9D40000-memory.dmp

        memory/1868-1755-0x00000202F95F0000-0x00000202F9610000-memory.dmp

        memory/1868-1733-0x00000201F8B80000-0x00000201F8BA0000-memory.dmp

        memory/1868-1732-0x00000202F9170000-0x00000202F9190000-memory.dmp

        memory/1868-1730-0x00000201F8400000-0x00000201F8500000-memory.dmp

        memory/1868-1640-0x00000201E5400000-0x00000201E5500000-memory.dmp

        memory/4632-63-0x00007FF7E5160000-0x00007FF7E51B3000-memory.dmp

        memory/5976-1611-0x0000028D687E0000-0x0000028D687E1000-memory.dmp

        memory/5976-1605-0x0000028D687E0000-0x0000028D687E1000-memory.dmp

        memory/5976-1606-0x0000028D687E0000-0x0000028D687E1000-memory.dmp

        memory/5976-1607-0x0000028D687E0000-0x0000028D687E1000-memory.dmp

        memory/5976-1608-0x0000028D687E0000-0x0000028D687E1000-memory.dmp

        memory/5976-1609-0x0000028D687E0000-0x0000028D687E1000-memory.dmp

        memory/5976-1610-0x0000028D687E0000-0x0000028D687E1000-memory.dmp

        memory/5976-1601-0x0000028D687E0000-0x0000028D687E1000-memory.dmp

        memory/5976-1599-0x0000028D687E0000-0x0000028D687E1000-memory.dmp

        memory/5976-1600-0x0000028D687E0000-0x0000028D687E1000-memory.dmp