Analysis

  • max time kernel
    121s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/02/2024, 16:21

General

  • Target

    VirusShare_de1d9d35a790080138c0aa5efd78ac2c.exe

  • Size

    657KB

  • MD5

    de1d9d35a790080138c0aa5efd78ac2c

  • SHA1

    200c752cc0a14d35e88d9cf20ae7167fbe854a52

  • SHA256

    597c1d7ea178d6def194608b6bbf233a8892ec001a6c0063a35553dde948c5b0

  • SHA512

    181000822b86a08a520be38dc205eb804ca3aeee49f3d311287aa7cfaf5cb633e0b45df726192546f0494195043af199b6744d5474067d7ba65f74163b6d3dfc

  • SSDEEP

    12288:Q0SLgVCG4GQTq4OaQQTYJ8eP4/L5uO7D3f5Bkq4Ga7QT2J8ePP/Z5uO7FApmz/d:Q04gVCG4GQm4OaHYJ8eP4D5uOHBBZ4Ga

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\VirusShare_de1d9d35a790080138c0aa5efd78ac2c.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_de1d9d35a790080138c0aa5efd78ac2c.exe"
    1⤵
    • Checks computer location settings
    • 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:1896
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release234\ie\RichMediaViewV1release234.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:2296
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:2264
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
      1⤵
        PID:1376
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
        1⤵
          PID:2960

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              • C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release234\ie\RichMediaViewV1release234.dll

                Filesize

                85KB

                MD5

                54172d2c0816ec37f97ea8fdef19b247

                SHA1

                a44af12822a1567276bedf0dd148bb6dc6e94b78

                SHA256

                a05699032c4a81e650a626ca06bd8eb84b721d1884651972e8ac4027befcabc0

                SHA512

                b41411b71139ab023e4e69fa16a066dd0bb8d1712d860ef69446c40229a0b3481a1c6dc9466f8b7701923761bd6fcc5f51e099f89ce27290c6502a0f2f0d134a

              • C:\Users\Admin\AppData\Local\Temp\nsa48D1.tmp\aminsis.dll

                Filesize

                567KB

                MD5

                450753ad96785a240a39deccab3af0d0

                SHA1

                21c544064d2ffa6444508268ce258a330d459fc5

                SHA256

                1c371dcc6c3428ea98fb0d2dcb612b4ebc731f3ed72e683c8e33058cd2a952d3

                SHA512

                c41b834f4228b7668316095569c836b4e0d55c5fbf310c65b0e0453ef0e74a3ce8f9357cea90b80f6590f85dd7708eeb4eec27518811ea4aab20c0e7f5643dab