Analysis

  • max time kernel
    117s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    04/02/2024, 16:23

General

  • Target

    VirusShare_ef628936d86c881711b36ed9f2fe244e.exe

  • Size

    657KB

  • MD5

    ef628936d86c881711b36ed9f2fe244e

  • SHA1

    0ee27bfdc1c657606e247b5381ed2ececf48b763

  • SHA256

    208d2d73481c89d5d3f2a83835ba6f64d3afe07b0604fc339a7e90ad596ae9ac

  • SHA512

    aaacb435de31bbf4ca8954974c40f400f247e874a4fdc29ae7e3ebe48f245b229c03cbf11d543c937a5d734207ed9f9426db502836e6cdbfcb2ba8f8717c1118

  • SSDEEP

    12288:Zp6v0xwNG4GQTq4OaQQTYJ8eP4/L5uO7D3f5Beq4kaJQTgJ8ePB/t5uO7SU26BBY:Zp6SqG4GQm4OaHYJ8eP4D5uOHBBD4kao

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_ef628936d86c881711b36ed9f2fe244e.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_ef628936d86c881711b36ed9f2fe244e.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:1972
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release116\ie\RichMediaViewV1release116.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:1744
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:2648

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release116\ie\RichMediaViewV1release116.dll

            Filesize

            85KB

            MD5

            edda7b7b239ba2b1f370145ee2defe4e

            SHA1

            66d60c54bbdaa26be11c3cd2cb7f0d7c9bbbb31f

            SHA256

            c1eb71dae33b855f250ce059f4c34e29b48f4e9580bf40a681c02d68133767e5

            SHA512

            7ed55891333448bbe5dc5bbf791534e6b6b47123c9bdebdb04463befed24853ddfad2980f551986635c89f24f9d9888847441f3c1aa8a1950d535d747017a7b4

          • \Users\Admin\AppData\Local\Temp\nsd1A74.tmp\aminsis.dll

            Filesize

            567KB

            MD5

            450753ad96785a240a39deccab3af0d0

            SHA1

            21c544064d2ffa6444508268ce258a330d459fc5

            SHA256

            1c371dcc6c3428ea98fb0d2dcb612b4ebc731f3ed72e683c8e33058cd2a952d3

            SHA512

            c41b834f4228b7668316095569c836b4e0d55c5fbf310c65b0e0453ef0e74a3ce8f9357cea90b80f6590f85dd7708eeb4eec27518811ea4aab20c0e7f5643dab