Analysis

  • max time kernel
    121s
  • max time network
    149s
  • 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, 14:41

General

  • Target
    VirusShare_f744078dcb8127c67b384204063c3e9a.exe
  • Size 657KB
  • Sample240204-r2f1kscbe2
  • SHA256 1a57e79dd08fe6a8e049efaa195efbb410b8103439c1b8a37355f3bf1380915f
  • 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_f744078dcb8127c67b384204063c3e9a.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_f744078dcb8127c67b384204063c3e9a.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:4868
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release6203\ie\RichMediaViewV1release6203.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:3592
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:3528
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
      1⤵
        PID:4988
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
        1⤵
          PID:4412

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              RichMediaViewV1release6203.dll

              • Path C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release6203\ie\RichMediaViewV1release6203.dll
              • Size 85KB
              • SHA256 9f0e44f81f5123a68245eb67c608b1a91cfbc35db1cda612799331b031118de0
              • MD5 SHA1 SHA512 SSDEEP

              aminsis.dll

              • Path C:\Users\Admin\AppData\Local\Temp\nsw499D.tmp\aminsis.dll
              • Size 395KB
              • SHA256 aeee87c5b3f61725d96442681dae22143da93cb52c26874981676c9aba67f8ad
              • MD5 SHA1 SHA512 SSDEEP

              aminsis.dll

              • Path C:\Users\Admin\AppData\Local\Temp\nsw499D.tmp\aminsis.dll
              • Size 384KB
              • SHA256 46f12654e0bc632efa9cefe42c464fb24a11c9ce04292352f8e6a127dd205521
              • MD5 SHA1 SHA512 SSDEEP