Analysis

  • max time kernel
    94s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-03-2024 17:57

General

  • Target

    $TEMP/$_8_.dll

  • Size

    380KB

  • MD5

    9ea41d845f06f65cc4f18c0c60a4a69f

  • SHA1

    c3d119060bb7273798571d790d49cc1a2c890204

  • SHA256

    edbe235ae1344856534b60a92a08d69ce8ef18c4656853340acbad2f4e70326c

  • SHA512

    12fc02282533df30cf6ca5ca5973d746d9a4064877287a7247cfd39cdcb4dbf132526188d6f97033777e38431e3c4c76d54a291163c8e4241f0bffc4513727e0

  • SSDEEP

    6144:W5vuZ2WFasIULOmdIiyPuseKUINW5hqrSzAxbkDyl9OIzNIk/qfhCIq2igR/5:Avu9F1IULOmyPusfs54SzAxbkDyOIzNC

Malware Config

Signatures

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 40 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\$TEMP\$_8_.dll
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4784
    • C:\Windows\SysWOW64\regsvr32.exe
      /s C:\Users\Admin\AppData\Local\Temp\$TEMP\$_8_.dll
      2⤵
      • Adds Run key to start application
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:4996
  • C:\Program Files (x86)\Internet Explorer\ielowutil.exe
    "C:\Program Files (x86)\Internet Explorer\ielowutil.exe" -CLSID:{0002DF01-0000-0000-C000-000000000046} -Embedding
    1⤵
      PID:5092
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4048
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4048 CREDAT:17410 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:4688

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

      Filesize

      471B

      MD5

      6f11b9401e2b512faaad278ff27f8e5a

      SHA1

      3a8a8ed2f92c4165059e8d11c70ed0140cc99d3b

      SHA256

      abbacb77eb59b95f5b3b50eeec27dbd6e689bc98f36a4bcdbd5a9c583fbad122

      SHA512

      569744b04e01f935dbfa776b6d55aa43fbb24fc770b4996c00dba788791c7eea05ee5d9ab7eb48b45996e1fa29062717c13b0c3c6704211f7eed7e0b552aaa0c

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

      Filesize

      404B

      MD5

      b92775f5ea0aa2d205108029e25c1863

      SHA1

      5dfbfca5f9e0bb534d4c12a9549278ef46a46240

      SHA256

      63ad6946c34cda3a363c620cc0c414f62708f8e20e3f9adf14e342bf729d34b2

      SHA512

      95284dc74d43ce3424da5124c8ae79cb4dfb0f32a607dc7cc823deb849af79130bf3948e38b1d3ef231a50c7ab1413d0f1dd52f72ecee3c4d85b9431d49d65f9

    • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\DomainSuggestions\en-US.1

      Filesize

      17KB

      MD5

      5a34cb996293fde2cb7a4ac89587393a

      SHA1

      3c96c993500690d1a77873cd62bc639b3a10653f

      SHA256

      c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

      SHA512

      e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

    • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\VersionManager\verBF77.tmp

      Filesize

      15KB

      MD5

      1a545d0052b581fbb2ab4c52133846bc

      SHA1

      62f3266a9b9925cd6d98658b92adec673cbe3dd3

      SHA256

      557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1

      SHA512

      bd326d111589d87cd6d019378ec725ac9ac7ad4c36f22453941f7d52f90b747ede4783a83dfff6cae1b3bb46690ad49cffa77f2afda019b22863ac485b406e8d