Overview

overview

6

Static

static

1

YandexPackSetup.exe

windows10-2004-x64

6

YandexPackSetup.exe

windows11-ltsc_2024-x64

6

Analysis

  • max time kernel
    105s
  • max time network
    126s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    19/06/2026, 12:17

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General

  • Target
    YandexPackSetup.exe
  • Size 10.1MB
  • Sample260619-pf3lcahs21
  • SHA256 d5b72aa5b7c38546bf8b8bcd2ed5349f15a20e23cff2542ee77df782be549b3f
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
6/10
adwaredefense_evasiondiscoverypersistenceransomwarespywarestealertrojan

Malware Config

Signatures

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    persistence
  • Enumerates connected drives 3 TTPs 48 IoCs

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

  • Checks installed software on the system 1 TTPs

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

    discovery
  • Drops file in Windows directory 21 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 10 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

    discovery
  • 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.

    spywarestealer
  • System Location Discovery: System Language Discovery 1 TTPs 5 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 62 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 3 IoCs
    adwarespyware
  • Modifies registry class 38 IoCs
  • Modifies system certificate store 2 TTPs 7 IoCs
    defense_evasionspywaretrojan
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 55 IoCs
  • Suspicious use of SendNotifyMessage 40 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 5 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 WMI provider

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

    ransomware
  • 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\YandexPackSetup.exe
    "C:\Users\Admin\AppData\Local\Temp\YandexPackSetup.exe"
    1⤵
    • Enumerates connected drives
    • System Location Discovery: System Language Discovery
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2592
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2000
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding FA7E1A7576490BB1940EDF5C19D4B98A
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4920
      • C:\Users\Admin\AppData\Local\Temp\3CEBB137-F8EC-49F2-A78A-37986FD92C21\lite_installer.exe
        "C:\Users\Admin\AppData\Local\Temp\3CEBB137-F8EC-49F2-A78A-37986FD92C21\lite_installer.exe" --use-user-default-locale --silent --cumtom-welcome-page=https://browser.yandex.ru/promo/welcome_com/5/
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:4188
      • C:\Users\Admin\AppData\Local\Temp\C434907A-8FD7-4F97-97B6-7619AA3AA752\seederexe.exe
        "C:\Users\Admin\AppData\Local\Temp\C434907A-8FD7-4F97-97B6-7619AA3AA752\seederexe.exe" "--yqs=" "--yhp=" "--ilight=" "--oem=" "--nopin=n" "--pin_custom=n" "--pin_desktop=n" "--pin_taskbar=y" "--locale=us" "--browser=" "--browser_default=" "--loglevel=trace" "--ess=" "--clids=C:\Users\Admin\AppData\Local\Temp\clids-yasearch.xml" "--sender=C:\Users\Admin\AppData\Local\Temp\10F4736E-E43F-42EB-9A3C-2367AC3B846F\sender.exe" "--is_elevated=yes" "--ui_level=5" "--good_token=x" "--no_opera=n"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Modifies Internet Explorer settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:5092
        • C:\Users\Admin\AppData\Local\Temp\10F4736E-E43F-42EB-9A3C-2367AC3B846F\sender.exe
          C:\Users\Admin\AppData\Local\Temp\10F4736E-E43F-42EB-9A3C-2367AC3B846F\sender.exe --send "/status.xml?clid=2255073&uuid=b82f7f1b-d21a-4c54-adb3-077732365d1c&vnt=Windows 11x64&file-no=8%0A15%0A25%0A45%0A57%0A59%0A102%0A111%0A125%0A"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:3384
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:3092
    • C:\Windows\explorer.exe
      explorer.exe /LOADSAVEDWINDOWS
      2⤵
      • Boot or Logon Autostart Execution: Active Setup
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:1424
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:3564
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:740

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        e590d65.rbs
        • Path C:\Config.Msi\e590d65.rbs
        • Size 580B
        • SHA256 12f27a30f2a992f3f791edfb6ef6bc1af6de63a0bdc63f94c7afbc0a0209c45c
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        prep_Activatable Class_Hermes_perf.cache
        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
        • Size 607B
        • SHA256 be6b74e52e5eef1f1c27c0976bf3bf1bfa99958c00bbef2898a602f691be6dae
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        prep_Activatable Class_Hermes_perf.cache
        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
        • Size 599B
        • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        sender.exe
        • Path C:\Users\Admin\AppData\Local\Temp\10F4736E-E43F-42EB-9A3C-2367AC3B846F\sender.exe
        • Size 260KB
        • SHA256 36022c6ecb3426791e6edee9074a3861fe5b660d98f2b2b7c13b80fe11a75577
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        lite_installer.exe
        • Path C:\Users\Admin\AppData\Local\Temp\3CEBB137-F8EC-49F2-A78A-37986FD92C21\lite_installer.exe
        • Size 419KB
        • SHA256 688d0b782437ccfae2944281ade651a2da063f222e80b3510789dbdce8b00fdc
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        seederexe.exe
        • Path C:\Users\Admin\AppData\Local\Temp\C434907A-8FD7-4F97-97B6-7619AA3AA752\seederexe.exe
        • Size 8.6MB
        • SHA256 35585d12899435e13e186490fcf1d270adbe3c74a1e0578b3d9314858bf2d797
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        YandexSearch00000.log
        • Path C:\Users\Admin\AppData\Local\Temp\YandexSearch00000.log
        • Size 34KB
        • SHA256 c375627e8084ace41e3ea1db98675967cb03e2b3e3ce3b05d57514845e56dbc2
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        clids-yasearch.xml
        • Path C:\Users\Admin\AppData\Local\Temp\clids-yasearch.xml
        • Size 560B
        • SHA256 52d8e057664a63a6c14fb766f45ad5a5b2f40383a81a1251b3de94291adb7845
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        vendor00000.xml
        • Path C:\Users\Admin\AppData\Local\Temp\vendor00000.xml
        • Size 577B
        • SHA256 d68fa576fc72424371c6a475337ab2cec8b3a305f8c3979e144ff3edf4898a2f
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        YandexSearch.msi
        • Path C:\Users\Admin\AppData\Local\Temp\{5B964E0E-B9A3-4276-9ED9-4D5A5720747A}\YandexSearch.msi
        • Size 9.8MB
        • SHA256 bfb1e5c8aee5ce902c33d2bf8d57c8a868c4e0e3fb2e776ab53efc42b758b98e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        places.sqlite
        • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\31kw45k8.Admin\places.sqlite
        • Size 68KB
        • SHA256 b6d278384a3684409a2a86f03e4f52869818ce7dd8b5779876960353f7d35dc1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Bookmarks
        • Path C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Bookmarks
        • Size 1KB
        • SHA256 2b167248e8136c4d45c2c46e2bff6fb5e5137dd4dfdccde998599be2df2e9335
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        Preferences
        • Path C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Preferences
        • Size 313B
        • SHA256 ed6a32e11cc99728771989b01f5ae813de80c46a59d3dc68c23a4671a343cb8c
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ui
        • Path C:\Users\Admin\AppData\Roaming\Yandex\ui
        • Size 38B
        • SHA256 938039397e823cace26b0864a0d84c014de7049468558dde51c84ff053cc8318
        • MD5 SHA1 SHA512
        Submit Download

        MSI1033.tmp
        • Path C:\Windows\Installer\MSI1033.tmp
        • Size 181KB
        • SHA256 a5dd2f97c6787c335b7807ff9b6966877e9dd811f9e26326837a7d2bd224de86
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        MSI10B1.tmp
        • Path C:\Windows\Installer\MSI10B1.tmp
        • Size 189KB
        • SHA256 669cc0aae068ced3154acaecb0c692c4c5e61bc2ca95b40395a3399e75fcb9b2
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/3564-254-0x0000021983C70000-0x0000021983C90000-memory.dmp
        Download

        memory/3564-270-0x00000219846A0000-0x00000219846C0000-memory.dmp
        Download

        memory/3564-224-0x00000219801E0000-0x00000219802E0000-memory.dmp
        Download

        memory/3564-236-0x0000021983E50000-0x0000021983F50000-memory.dmp
        Download

        memory/3564-235-0x0000021983A30000-0x0000021983A50000-memory.dmp
        Download