Resubmissions

02/03/2024, 22:38

240302-2kwptaae3710

02/03/2024, 22:34

240302-2g86qsad9610

Analysis

  • max time kernel
    1364s
  • max time network
    1156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/03/2024, 22:38

General

  • Target
    Fake AV/PCDefender.exe
  • Size 878KB
  • Sample240302-2kwptaae37
  • SHA256 5ae57d8750822c203f5bf5e241c7132377b250df36a215dff2f396c8440b82dd
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 12 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 7 IoCs
  • Modifies registry class 31 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Fake AV\PCDefender.exe
    "C:\Users\Admin\AppData\Local\Temp\Fake AV\PCDefender.exe"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3096
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\RarSFX0\PCDefenderSilentSetup.msi"
      2⤵
      • Enumerates connected drives
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:1140
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4464
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:1616
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 886EB165EAC48AE813F96AEBB1C88F22 E Global\MSI0000
        2⤵
        • Modifies WinLogon for persistence
        • Modifies data under HKEY_USERS
        PID:4908
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:4980

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          e593765.rbs

          • Path C:\Config.Msi\e593765.rbs
          • Size 10KB
          • SHA256 59be083df29bdadbbe21e6fd3215c71b22477c0785472e28b553073afe79f3b1
          • MD5 SHA1 SHA512 SSDEEP

          PCDefenderSilentSetup.msi

          • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\PCDefenderSilentSetup.msi
          • Size 691KB
          • SHA256 4af1c191aada8163783e2cd865a2b989afd936b4c2dd68a71f8a9d7b5f484a05
          • MD5 SHA1 SHA512 SSDEEP

          PCDefenderSilentSetup.msi

          • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\PCDefenderSilentSetup.msi
          • Size 870KB
          • SHA256 586f9a9af50b2a3321e77d2b4583741cc4842967af9429cc371534f7179caec4
          • MD5 SHA1 SHA512 SSDEEP

          _3F16219B047CF8432B7ADA.exe

          • Path C:\Windows\Installer\{FC2ABC8E-3715-4A32-B8B5-559380F45282}\_3F16219B047CF8432B7ADA.exe
          • Size 21KB
          • SHA256 912ebab4ab2ea830b961df778dd854e555c89e05e25b7c02b3737429115405f9
          • MD5 SHA1 SHA512 SSDEEP

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 23.7MB
          • SHA256 36f9eec57a138eb99f1114c89d57d9f7b594ddafb0f2d85edf3701ea33ad2760
          • MD5 SHA1 SHA512 SSDEEP

          {54f0104d-039e-4672-8020-c81f00ee1bc6}_OnDiskSnapshotProp

          • Path \??\Volume{eb4950db-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{54f0104d-039e-4672-8020-c81f00ee1bc6}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 d047655816ba9a550cd3f5d0df790ccea9447302007922e041d4e9d920ac4e18
          • MD5 SHA1 SHA512 SSDEEP