Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    02/05/2026, 12:16

General

  • Target
    tavsegitseg.exe
  • Size 29.6MB
  • Sample260502-pffftaav8n
  • SHA256 735262d6b7f50a669d4d53d567b2c4b252c5293f9cf2a574bbf4885199a67589
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 12 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Reads user/profile data of web browsers 3 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry class 1 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tavsegitseg.exe
    "C:\Users\Admin\AppData\Local\Temp\tavsegitseg.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1776
    • C:\Users\Admin\AppData\Local\Temp\TeamViewer\TeamViewer.exe
      "C:\Users\Admin\AppData\Local\Temp\TeamViewer\TeamViewer.exe" --configuration zg8mcsa
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:3132
      • C:\Users\Admin\AppData\Local\Temp\TeamViewer\tv_w32.exe
        "C:\Users\Admin\AppData\Local\Temp\TeamViewer\tv_w32.exe" --action hooks --log
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Modifies data under HKEY_USERS
        PID:4780
      • C:\Users\Admin\AppData\Local\Temp\TeamViewer\tv_x64.exe
        "C:\Users\Admin\AppData\Local\Temp\TeamViewer\tv_x64.exe" --action hooks --log
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Modifies data under HKEY_USERS
        PID:5064

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        TV_w32.dll

        • Path C:\Users\Admin\AppData\Local\Temp\TeamViewer\TV_w32.dll
        • Size 491KB
        • SHA256 8883f4d4d05c96e8586365ef284b3e85a11218d9aa778a03ac6d3a38aa716287
        • MD5 SHA1 SHA512 SSDEEP TLSH

        TV_w32.exe

        • Path C:\Users\Admin\AppData\Local\Temp\TeamViewer\TV_w32.exe
        • Size 346KB
        • SHA256 955ff4af38e189063050c0ad545d1152f82f29470606ab776317bc710f3bb81c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        TV_x64.dll

        • Path C:\Users\Admin\AppData\Local\Temp\TeamViewer\TV_x64.dll
        • Size 621KB
        • SHA256 d0e33832de0f96ef5ca21d62d0c989a20881b5c1bc732da206f2fa82b4baee8a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        TV_x64.exe

        • Path C:\Users\Admin\AppData\Local\Temp\TeamViewer\TV_x64.exe
        • Size 414KB
        • SHA256 6b9188dd6d88d7ffb2efa42acd4ced3105a30b7fc7e57a326af432fb40e61383
        • MD5 SHA1 SHA512 SSDEEP TLSH

        TeamViewer_Resource_de.dll

        • Path C:\Users\Admin\AppData\Local\Temp\TeamViewer\TeamViewer_Resource_de.dll
        • Size 439KB
        • SHA256 d122bd2b1a0f1fc25412e432c96161f555b29ed551a0a7397e7c3d424ee4c424
        • MD5 SHA1 SHA512 SSDEEP TLSH

        TeamViewer_Resource_en.dll

        • Path C:\Users\Admin\AppData\Local\Temp\TeamViewer\TeamViewer_Resource_en.dll
        • Size 383KB
        • SHA256 2a66ea2ba9840f475ae71678b46563a1f69032a16a2b82a87d0eb99241824d4b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        TeamViewer_StaticRes.dll

        • Path C:\Users\Admin\AppData\Local\Temp\TeamViewer\TeamViewer_StaticRes.dll
        • Size 9.2MB
        • SHA256 39f551c8351c4b94fad288f0c4ab3c5d3bcdadde597bca46e169d1402a8b53f0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        logo.png

        • Path C:\Users\Admin\AppData\Local\Temp\TeamViewer\logo.png
        • Size 29KB
        • SHA256 00b05ba624790add4551f1038e82384ef2ba016530ac35f6e2bda6d1f67f9420
        • MD5 SHA1 SHA512 SSDEEP TLSH

        tvinfo.ini

        • Path C:\Users\Admin\AppData\Local\Temp\TeamViewer\tvinfo.ini
        • Size 41B
        • SHA256 a37411ae102e9610de5aaa51157aedc256fba3c954dfed5ada02caa3faa7cc8a
        • MD5 SHA1 SHA512

        TeamViewer.json

        • Path C:\Users\Admin\AppData\Local\Temp\TeamViewer\{c050d327-b46a-4eba-b4a6-49f961f2ea25}\TeamViewer.json
        • Size 920B
        • SHA256 f74061e9cc22aeb423aa97eecf2f28cf9c67a386b43bc28d89bd8f634f729746
        • MD5 SHA1 SHA512 TLSH

        TeamViewer.sig

        • Path C:\Users\Admin\AppData\Local\Temp\TeamViewer\{c050d327-b46a-4eba-b4a6-49f961f2ea25}\TeamViewer.sig
        • Size 216B
        • SHA256 18b047f1d622c3021d26a5079922956cecc53076fa5ce621ac423e8407223aae
        • MD5 SHA1 SHA512 TLSH

        CustomerTools.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsg21FC.tmp\CustomerTools.dll
        • Size 1.1MB
        • SHA256 6428451d60cb29e9a8a3e1fe60d92819ad6861634128e5dd4492086be40001de
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsg21FC.tmp\System.dll
        • Size 12KB
        • SHA256 8b4c47c4cf5e76ec57dd5a050d5acd832a0d532ee875d7b44f6cdaf68f90d37c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        TvGetVersion.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsg21FC.tmp\TvGetVersion.dll
        • Size 696KB
        • SHA256 e35396c7d7e32a8fe771895ed9ea16bd85c8544410bf4dc70a42ccd2884cfd83
        • MD5 SHA1 SHA512 SSDEEP TLSH

        nsJSON.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsg21FC.tmp\nsJSON.dll
        • Size 30KB
        • SHA256 018cba12efaab3ec61cfa2c54772f0e070452d57f2fc71026826fd7e3f59bd39
        • MD5 SHA1 SHA512 SSDEEP TLSH

        nsis7z.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsg21FC.tmp\nsis7z.dll
        • Size 187KB
        • SHA256 5d71aaeefbc81732017e9040c8087e6686a16dd54e6d9bcd5ba7a47af68cc925
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/3132-229-0x0000000008380000-0x00000000083D1000-memory.dmp

        memory/4780-230-0x0000000002F60000-0x0000000002FB1000-memory.dmp

        memory/5064-232-0x000001F654DF0000-0x000001F654E0F000-memory.dmp

        memory/5064-231-0x000001F654A70000-0x000001F654A7C000-memory.dmp