Analysis

  • max time kernel
    143s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/02/2024, 13:21

General

  • Target
    VirusShare_39b9b39deb1168228ae87fa2086d43f6.exe
  • Size 634KB
  • Sample240204-qls5jaafe8
  • SHA256 1bd9b20c888a94b7cea6df18dcb401b599777c5c5fa0375adb2f720ab81abddc
  • 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_39b9b39deb1168228ae87fa2086d43f6.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_39b9b39deb1168228ae87fa2086d43f6.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:1928
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\MediaWatchV1\MediaWatchV1home289\ie\MediaWatchV1home289.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:1148
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:4772
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
      1⤵
        PID:4832
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
        1⤵
          PID:4516

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              MediaWatchV1home289.dll

              • Path C:\Program Files (x86)\MediaWatchV1\MediaWatchV1home289\ie\MediaWatchV1home289.dll
              • Size 85KB
              • SHA256 abdae40439549f1dd6f831a444ef37c210e93d8700ce02ebd1b8f7b736649fbc
              • MD5 SHA1 SHA512 SSDEEP

              aminsis.dll

              • Path C:\Users\Admin\AppData\Local\Temp\nsn736C.tmp\aminsis.dll
              • Size 559KB
              • SHA256 b620091bf9973e807e12155d2247a6d233b5d13ec38c426675470ab4b26f0539
              • MD5 SHA1 SHA512 SSDEEP