Analysis

  • max time kernel
    149s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    15/04/2026, 12:15

General

  • Target
    YandexPackSetup.exe
  • Size 10.1MB
  • Sample260415-pfbgvsdv9m
  • SHA256 ead7a779cabae642d09be07283cc99e53c84ecf90349444e0d0ac4bf9901fe47
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 10 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Badlisted process makes network request 1 IoCs

    Network request originating from process or tool commonly abused by malware.

  • Checks installed software on the system 1 TTPs

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

  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Drops file in System32 directory 64 IoCs
  • Drops file in Windows directory 17 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 60 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

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:3772
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4092
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding C76C52C8B4962E2AC46C6FFDCF03A7B7
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1552
      • C:\Users\Admin\AppData\Local\Temp\61C56737-8E3E-4B8F-8DBF-EF727FBDDCD0\lite_installer.exe
        "C:\Users\Admin\AppData\Local\Temp\61C56737-8E3E-4B8F-8DBF-EF727FBDDCD0\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:1760
      • C:\Users\Admin\AppData\Local\Temp\B49C07E5-2FEA-475B-A4CF-E078E5BB3758\seederexe.exe
        "C:\Users\Admin\AppData\Local\Temp\B49C07E5-2FEA-475B-A4CF-E078E5BB3758\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\CCABCAFB-BC0F-44D9-97BA-2FE9568C3915\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:4168
        • C:\Users\Admin\AppData\Local\Temp\CCABCAFB-BC0F-44D9-97BA-2FE9568C3915\sender.exe
          C:\Users\Admin\AppData\Local\Temp\CCABCAFB-BC0F-44D9-97BA-2FE9568C3915\sender.exe --send "/status.xml?clid=6035492&uuid=e0edc133-8932-4080-a064-abd4d166a697&vnt=Windows 10x64&file-no=8%0A15%0A25%0A45%0A57%0A59%0A102%0A111%0A125%0A129%0A"
          4⤵
          • Executes dropped EXE
          • Drops file in System32 directory
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:8040
  • C:\Users\Admin\AppData\Local\Temp\CCABCAFB-BC0F-44D9-97BA-2FE9568C3915\sender.exe
    "C:\Users\Admin\AppData\Local\Temp\CCABCAFB-BC0F-44D9-97BA-2FE9568C3915\sender.exe" --job-name=ySenderExe-{BAFA083B-E739-4FD0-AD55-78B17803C8ED} --local-path=C:\Users\Admin\AppData\Local\Temp\yst.tmp --send="/status.xml?clid=6035492&uuid=e0edc133-8932-4080-a064-abd4d166a697&vnt=Windows 10x64&file-no=8%0A15%0A25%0A45%0A57%0A59%0A102%0A111%0A125%0A129"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    PID:9056

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        e58a0c0.rbs

        • Path C:\Config.Msi\e58a0c0.rbs
        • Size 575B
        • SHA256 a0eec60a4e5d5f3ec02aed49a5c424391e0d6d9308843f84e5acedaa51a5fd8a
        • MD5 SHA1 SHA512 TLSH

        357F04AD41BCF5FE18FCB69F60C6680F_394487CAFBCFB8C5917AD7A10924C8A7

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\357F04AD41BCF5FE18FCB69F60C6680F_394487CAFBCFB8C5917AD7A10924C8A7
        • Size 1KB
        • SHA256 7fe9b3c538fa6c1cac4a8cf7dfedd6ac4abd1c7532d720e32cabd7de6244af38
        • MD5 SHA1 SHA512 TLSH

        357F04AD41BCF5FE18FCB69F60C6680F_394487CAFBCFB8C5917AD7A10924C8A7

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\357F04AD41BCF5FE18FCB69F60C6680F_394487CAFBCFB8C5917AD7A10924C8A7
        • Size 536B
        • SHA256 0f116822e31bc5970089213954b8bf43a19006d5d7da9d63d6f33c2a58faea39
        • MD5 SHA1 SHA512 TLSH

        lite_installer.exe

        • Path C:\Users\Admin\AppData\Local\Temp\61C56737-8E3E-4B8F-8DBF-EF727FBDDCD0\lite_installer.exe
        • Size 419KB
        • SHA256 688d0b782437ccfae2944281ade651a2da063f222e80b3510789dbdce8b00fdc
        • MD5 SHA1 SHA512 SSDEEP TLSH

        seederexe.exe

        • Path C:\Users\Admin\AppData\Local\Temp\B49C07E5-2FEA-475B-A4CF-E078E5BB3758\seederexe.exe
        • Size 8.6MB
        • SHA256 35585d12899435e13e186490fcf1d270adbe3c74a1e0578b3d9314858bf2d797
        • MD5 SHA1 SHA512 SSDEEP TLSH

        sender.exe

        • Path C:\Users\Admin\AppData\Local\Temp\CCABCAFB-BC0F-44D9-97BA-2FE9568C3915\sender.exe
        • Size 260KB
        • SHA256 36022c6ecb3426791e6edee9074a3861fe5b660d98f2b2b7c13b80fe11a75577
        • MD5 SHA1 SHA512 SSDEEP TLSH

        YandexSearch00000.log

        • Path C:\Users\Admin\AppData\Local\Temp\YandexSearch00000.log
        • Size 34KB
        • SHA256 3eaed34874a38c75ba36b42293d864b3124f31e204a1e8e3a0c1020bcc372486
        • MD5 SHA1 SHA512 SSDEEP TLSH

        clids-yasearch.xml

        • Path C:\Users\Admin\AppData\Local\Temp\clids-yasearch.xml
        • Size 531B
        • SHA256 081acaf053b713ef777e8d87a0760aeafb97a1e4b0fe8bd1cd631401ac90c7e1
        • MD5 SHA1 SHA512 TLSH

        omnija-20261615.zip

        • Path C:\Users\Admin\AppData\Local\Temp\omnija-20261615.zip
        • Size 45.1MB
        • SHA256 7d5072b7fa0880c245cb54a627474b67df7b4f3f33a7ae828b39417f9621eef0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        vendor00000.xml

        • Path C:\Users\Admin\AppData\Local\Temp\vendor00000.xml
        • Size 510B
        • SHA256 1a855972dc308e47d30d567e1b37fdad349bf555b971bc14ead76e17a8accccc
        • MD5 SHA1 SHA512 TLSH

        YandexSearch.msi

        • Path C:\Users\Admin\AppData\Local\Temp\{5B964E0E-B9A3-4276-9ED9-4D5A5720747A}\YandexSearch.msi
        • Size 9.8MB
        • SHA256 b2fda5fb2d8e65fc0448d308647d8afd1e4ecd7bff0103ec3700e0798a7db0a3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        places.sqlite-20260415121654.994719.backup

        • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\yst4f00o.Admin\places.sqlite-20260415121654.994719.backup
        • Size 68KB
        • SHA256 b6d278384a3684409a2a86f03e4f52869818ce7dd8b5779876960353f7d35dc1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Bookmarks-20260415121655.072841.backup

        • Path C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Bookmarks-20260415121655.072841.backup
        • Size 1KB
        • SHA256 2b167248e8136c4d45c2c46e2bff6fb5e5137dd4dfdccde998599be2df2e9335
        • MD5 SHA1 SHA512 TLSH

        Preferences-20260415121655.072841.backup

        • Path C:\Users\Admin\AppData\Roaming\Opera Software\Opera Stable\Preferences-20260415121655.072841.backup
        • Size 313B
        • SHA256 ed6a32e11cc99728771989b01f5ae813de80c46a59d3dc68c23a4671a343cb8c
        • MD5 SHA1 SHA512 TLSH

        ui

        • Path C:\Users\Admin\AppData\Roaming\Yandex\ui
        • Size 38B
        • SHA256 2963075e70bfd230d367e2833f6fa39750ab2a7da71572af9bcc4bf5b78b519a
        • MD5 SHA1 SHA512

        MSIA39E.tmp

        • Path C:\Windows\Installer\MSIA39E.tmp
        • Size 181KB
        • SHA256 a5dd2f97c6787c335b7807ff9b6966877e9dd811f9e26326837a7d2bd224de86
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSIA41C.tmp

        • Path C:\Windows\Installer\MSIA41C.tmp
        • Size 189KB
        • SHA256 669cc0aae068ced3154acaecb0c692c4c5e61bc2ca95b40395a3399e75fcb9b2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/3772-13-0x0000000005A10000-0x0000000005A17000-memory.dmp

        memory/3772-206-0x0000000005A10000-0x0000000005A17000-memory.dmp

        memory/3772-207-0x0000000006E30000-0x0000000006EAE000-memory.dmp

        memory/4092-9086-0x0000017B97940000-0x0000017B979B9000-memory.dmp

        memory/4092-9087-0x0000017B983A0000-0x0000017B983AC000-memory.dmp