Analysis

  • max time kernel
    90s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-01-2024 01:22

General

  • Target

    $TEMP/$_8_.dll

  • Size

    387KB

  • MD5

    786a5685af4b708e62acfbad7fc6c769

  • SHA1

    7e49ca417e0ae64e9a415251e016b55bfe7cb9b2

  • SHA256

    a6311b27642edf137af5eb9850eb6c1ecc86162040c03642a5b8afd7744f520a

  • SHA512

    181a537da11911fe7c94597968edaa28c7bbb97c0db9f760e0fd7fd3fb4cb0a7e2b228c8598e571e68a54bef2bb3da151c998b6a341ffc0ec985150f2485a850

  • SSDEEP

    12288:ELYeMLuvtV3PwvVQsM0+qd7hxVYkUHsU:9iX34VQsM0+qd7h7He

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 57 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:3272
    • 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:4524
  • 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:3420
    • 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:3612
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3612 CREDAT:17410 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:1912

    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

      55adff48fbcd7763c70a0d51d485d24f

      SHA1

      8ba66cb09d8e16d22c35931083d443155d3a04fa

      SHA256

      801c05af90120efdf31e4dfdcc5e7f2b76b9ca0e0746f58fdf12bf99287d8aca

      SHA512

      a3151d562469fd2412c237bb5646bb214a9a9f8664be4eb48fdf704d9710872e41947669f770ac74d9d1eb5d6ea5953e40cc5a85d57e56fc82708341154eee7b

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

      Filesize

      404B

      MD5

      6ab43691cfceb3b485f6e55acd29f558

      SHA1

      b7d1c82ea626a608e4d26c9afe217967a05179ff

      SHA256

      b140739043c650f03251f2ff87f946c5cbd22480211c0fd60324940420dcaa3a

      SHA512

      d060ef5b826b7caea0617d7080667661f024dfc5a526886d41977833b890192c39d5828af61e404d39180d63e9e6dce925857e650adc12a7abf73c5153cbeeeb

    • C:\Users\Admin\AppData\LocalLow\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico

      Filesize

      4KB

      MD5

      da597791be3b6e732f0bc8b20e38ee62

      SHA1

      1125c45d285c360542027d7554a5c442288974de

      SHA256

      5b2c34b3c4e8dd898b664dba6c3786e2ff9869eff55d673aa48361f11325ed07

      SHA512

      d8dc8358727590a1ed74dc70356aedc0499552c2dc0cd4f7a01853dd85ceb3aead5fbdc7c75d7da36db6af2448ce5abdff64cebdca3533ecad953c061a9b338e

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\8D1Z5HG5\suggestions[1].en-US

      Filesize

      17KB

      MD5

      5a34cb996293fde2cb7a4ac89587393a

      SHA1

      3c96c993500690d1a77873cd62bc639b3a10653f

      SHA256

      c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

      SHA512

      e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee