Analysis

  • max time kernel
    121s
  • max time network
    124s
  • 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, 15:48

General

  • Target
    VirusShare_f36ac7fe92af1b022706d3f38a491f80.exe
  • Size 657KB
  • Sample240204-s8t2fsfebl
  • SHA256 2a194c3d5a62b2ef02d04ddfe3b986bff84cd721645804b9e6a9fa16fd44ff1e
  • MD5 SHA1 SHA512 SSDEEP

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_f36ac7fe92af1b022706d3f38a491f80.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_f36ac7fe92af1b022706d3f38a491f80.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:3528
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release4992\ie\RichMediaViewV1release4992.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:3644
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:3648
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
      1⤵
        PID:3848
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
        1⤵
          PID:2424

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              RichMediaViewV1release4992.dll

              • Path C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release4992\ie\RichMediaViewV1release4992.dll
              • Size 85KB
              • SHA256 303b8bb5c34ae7bc977177b734f6f845650d4cada97caaa9a02c2694e4e76d89
              • MD5 SHA1 SHA512 SSDEEP

              aminsis.dll

              • Path C:\Users\Admin\AppData\Local\Temp\nsm3ECF.tmp\aminsis.dll
              • Size 567KB
              • SHA256 1c371dcc6c3428ea98fb0d2dcb612b4ebc731f3ed72e683c8e33058cd2a952d3
              • MD5 SHA1 SHA512 SSDEEP