Analysis

  • max time kernel
    125s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    04/02/2024, 16:19

General

  • Target

    VirusShare_a8c1c370bc3667f8ab42733e0473125e.exe

  • Size

    634KB

  • MD5

    a8c1c370bc3667f8ab42733e0473125e

  • SHA1

    16adebdd0b46f44e568375dd00c3d48cc7b51487

  • SHA256

    fa32c94aff2c3c6635800ccd22320866ca0217a7b151992674bb8fee63e2edae

  • SHA512

    ce17b1df01af7b280050401d2c47007cfa596a650f8193d414f1925fb1098b6373b5b7664379d44f365efecc1d988d605495f4e580439ffd081cad5cc34c3a3f

  • SSDEEP

    12288:sF1iai8G4GjeZHkwuPikQ7lKH5p5H9x1+eZHkwuziDQBlKR5psxjlf6:suP8G4GjeZEXi37l6Br1+eZEriMBlm0+

Malware Config

Signatures

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • 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 3 IoCs

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

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 22 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Modifies registry class 36 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\VirusShare_a8c1c370bc3667f8ab42733e0473125e.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_a8c1c370bc3667f8ab42733e0473125e.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2140
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\MediaWatchV1\MediaWatchV1home1747\ie\MediaWatchV1home1747.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:2680
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:2660

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Program Files (x86)\MediaWatchV1\MediaWatchV1home1747\ie\MediaWatchV1home1747.dll

            Filesize

            85KB

            MD5

            6588cc802bcc1b1a75c466b176354b71

            SHA1

            1d9cd3d5b14d5507f2ceb941d00f2da237012f63

            SHA256

            4e1f8de9ad11ad28e0f11d9985afaf8d3ed54805ab740b663df2342da13d3558

            SHA512

            ff166a11d3bfbbc8c2f370f6adcf29daf66b6eb38403298bebec8e1ce040e721020c3793b3e38bf020cf76c37db654bec7616e8668b9fe4392236bf9720e750d

          • \Users\Admin\AppData\Local\Temp\nsy70DD.tmp\aminsis.dll

            Filesize

            559KB

            MD5

            51ba1095f0ae45a2d444bea506cb9ad4

            SHA1

            038a5d53d055a6d440bd2c8864c2f51db206c5e5

            SHA256

            b620091bf9973e807e12155d2247a6d233b5d13ec38c426675470ab4b26f0539

            SHA512

            f5fe2dd0f19bcaab47540ceedbec71f7f7c5b833c8772c097594c458e5f1101fe9feb849812b65c175055f71dfb13f11c4ad94fef42cd66f247413e453de3361