Analysis

  • max time kernel
    123s
  • max time network
    127s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    04/02/2024, 20:44

General

  • Target

    VirusShare_abfb01a66ce9f58efb046a181a0e83fe.exe

  • Size

    657KB

  • MD5

    abfb01a66ce9f58efb046a181a0e83fe

  • SHA1

    47424864ec6f2517c599f0c9532b3971108ced25

  • SHA256

    dab2bc2dbbc75f4acc79370c9199ee22593620f2e468717485709661d63cbb89

  • SHA512

    6b22f7ec5a273ccaa0bfc918c63e64801de90c6d512c125f607d5d51707e85ad9e6585c5954b71329684549197001f36f7a41425eb02b81fde90b9a7782c75fd

  • SSDEEP

    12288:zvUbUUG4GQTq4OaQQTYJ8eP4/L5uO7D3f5Bvq4GanQTcJ8ePx/Z5uO7dApqz/lQ:zOUUG4GQm4OaHYJ8eP4D5uOHBBS4GamZ

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_abfb01a66ce9f58efb046a181a0e83fe.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_abfb01a66ce9f58efb046a181a0e83fe.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:2192
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release45\ie\RichMediaViewV1release45.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:2288
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:2580

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release45\ie\RichMediaViewV1release45.dll

            Filesize

            85KB

            MD5

            322fa7a3c9c2507d4c53e5a1bd6dd774

            SHA1

            b0cd9c6eaad5569a296e607ecaaa84d5df3511e7

            SHA256

            21db324b3c5141e45d240428a0c80e256cbba804265aafeb81b3897b2ae09633

            SHA512

            4a34f3f962a631225c4b6aff7838d0389dc2fead2cdeeb71257fd33ecd8529519943796ecd79133e2892deacc15e32e50548bf69358e498f9b63bec4fc99ee8e

          • \Users\Admin\AppData\Local\Temp\nso2CFB.tmp\aminsis.dll

            Filesize

            567KB

            MD5

            450753ad96785a240a39deccab3af0d0

            SHA1

            21c544064d2ffa6444508268ce258a330d459fc5

            SHA256

            1c371dcc6c3428ea98fb0d2dcb612b4ebc731f3ed72e683c8e33058cd2a952d3

            SHA512

            c41b834f4228b7668316095569c836b4e0d55c5fbf310c65b0e0453ef0e74a3ce8f9357cea90b80f6590f85dd7708eeb4eec27518811ea4aab20c0e7f5643dab