Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/07/2024, 05:16

General

  • Target

    screensavers.exe

  • Size

    500KB

  • MD5

    0f11fe9c10dfa433c3f61d0495fa1ff9

  • SHA1

    f741ce71f51bd87f64fe0e2a8ff8e299b1110c54

  • SHA256

    6c761773c1e1ca06d02f65c8c4d89927e7674666e87c8ef0966987e37f388dad

  • SHA512

    4a486c491a5503109c9f55e695c653c9a071e9d8ad50f7177ade5e3ff015883ef6123027f964c7aa73042b36f673be7ece1b7769d01e57e48398c471b386a9be

  • SSDEEP

    12288:A+EmP70O5pL+puFhc9iZkVMZfis5Sw/YrETyEEmG:A7mgI9FC8kVwisww/YxZmG

Malware Config

Signatures

  • Loads dropped DLL 11 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Installs/modifies Browser Helper Object 2 TTPs 1 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in Program Files directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 49 IoCs
  • Modifies registry class 24 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\screensavers.exe
    "C:\Users\Admin\AppData\Local\Temp\screensavers.exe"
    1⤵
    • Loads dropped DLL
    • Installs/modifies Browser Helper Object
    • Drops file in Program Files directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:828
    • C:\Program Files\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files\Internet Explorer\IEXPLORE.EXE" http://try.screensavers.com/landing/screensavers/intro_01.php
      2⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3432
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3432 CREDAT:17410 /prefetch:2
        3⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:1320

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Starware316\Starware316Config.xml

    Filesize

    107KB

    MD5

    29405c1c64cf0ecf87586d3148dcc15e

    SHA1

    1b88acdb69bebd27266da52c073f75a639bd48f0

    SHA256

    03ae2dc90886350a0ec8eb097944c26804481cc6a24cfbb1bb6ec3014de2f940

    SHA512

    0fbec80223f42b7cc444610120881ff242bf057759b0da7dc48d61272c8e37b010e6f514e7dc7b1732cff3f7838df5a892bf4fca47bf3d3d855d0c69d3a98bc8

  • C:\Program Files (x86)\Starware316\bin\Starware316.dll

    Filesize

    784KB

    MD5

    32e690f3964320bc19e250d3272a8d06

    SHA1

    e90dd4b963ad1cc98d6d152296d1f5f5d42003f1

    SHA256

    10922e8fbaa40bb7e4a41374a9371e94e7537c87185b16db842cca180d033864

    SHA512

    898092d3e4fe8a98d82f84ab342962ae5e764738d79fc736ce596af3e482401ec91ba55bb035fc4ab857343aef046f3c47ec4c4ebae93bb1ff743ae6e5d211b9

  • C:\Users\Admin\AppData\LocalLow\Starware316\Manager\ManagerOptions.xml.backup

    Filesize

    1KB

    MD5

    26a7ef0063b36a6559dba09c0057b8aa

    SHA1

    5a929ec4d005ad990897ce9a05d44899d4d28ddf

    SHA256

    c1e4ccb007a4dcfe2578ca10ef0a94db4e4fcee09c32698cfd81686b8705cd6e

    SHA512

    01b4b17a6f27d43f575287ff721b6db2bfa9ba1d5cc796d44aa58873500c4fd2172a7ab6d1e658e8a5908761abc74954213627fe4e69b6c77d8d52152a915295

  • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\VersionManager\ver153.tmp

    Filesize

    15KB

    MD5

    1a545d0052b581fbb2ab4c52133846bc

    SHA1

    62f3266a9b9925cd6d98658b92adec673cbe3dd3

    SHA256

    557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1

    SHA512

    bd326d111589d87cd6d019378ec725ac9ac7ad4c36f22453941f7d52f90b747ede4783a83dfff6cae1b3bb46690ad49cffa77f2afda019b22863ac485b406e8d

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\Q4XA6QBU\suggestions[1].en-US

    Filesize

    17KB

    MD5

    5a34cb996293fde2cb7a4ac89587393a

    SHA1

    3c96c993500690d1a77873cd62bc639b3a10653f

    SHA256

    c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

    SHA512

    e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

  • C:\Users\Admin\AppData\Local\Temp\nsz853E.tmp\System.dll

    Filesize

    10KB

    MD5

    05e52213cfa17dee760186462a9645ed

    SHA1

    f6d5e82080bbba65db7d54e89250c95af833aae3

    SHA256

    d9d3ffa4c7d7a152f435f4777e72aa1b6a6c0555f277e59eedebc587c3b66ba5

    SHA512

    586eea0bec6345b437667ce528bc2396427dd444a396456e38046a8962e92a52e7ee62b9f6c97f41bc1fb4a1b3905a302d6f7055e26b84e60709ba3b416ad172

  • C:\Users\Admin\AppData\Local\Temp\nsz853E.tmp\UserInfo.dll

    Filesize

    4KB

    MD5

    b27f488adb12bef2ccf9b9b900ec090c

    SHA1

    4c0049d304e3233246151e1bec1ed770fc226240

    SHA256

    62f30ca60cfc2e2a64c159f28b5caf59c6af96fac64c59ed8d8512d7083e9439

    SHA512

    a4ae24c48e49c11d589430f47c76f4ab5f22521e0a8b5ce9b0f9a3da81417e082ac5a0b9d2960e146c987773bce074883a818ba6d3e45d665ed96ccb945be3cf

  • C:\Users\Admin\AppData\Local\Temp\nsz853E.tmp\welcome.ini

    Filesize

    1KB

    MD5

    cd3ed70dd937c7dd738a54c06c6cac56

    SHA1

    80e0d8d7d6933f599a064a8a85464c1a8a7dc075

    SHA256

    b74fab0acfa93ace409c063371b9e1d9d6d2bdb7bf08cdc192b50adcf7c66c7c

    SHA512

    972fa80af01a06e8018cae6b5db6e763758078835b6ecc0d4fb625b5159c50e83852e2f47e79c924cc101f584672f19f8cc94379431010109e20abf2c0577bf3

  • C:\Users\Admin\AppData\Local\Temp\nsz853E.tmp\welcome.ini

    Filesize

    2KB

    MD5

    23f9a746b385dc57e322e92dd97df3b9

    SHA1

    3545cf39b92e1623c5109ea48044c7f8c0042e7c

    SHA256

    3f7940d8ae1266369b760625a30a7d7477b2762807de5729b3426a85f6ed60b7

    SHA512

    5949734af89325c7a40b5db95d050f0234c294a6313276d1eccc9173ff2d3cf0dc8f1e1bff5541ce0e7f9a62163143e3ef2c247b23801383dbefc1f0a569e254