Analysis

  • max time kernel
    118s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    18/06/2024, 16:07

General

  • Target
    375dbccaa8451b917097b50444b2ddeb9e43402172b6908e1182795dbae75904.msi
  • Size 5.4MB
  • Sample240618-tkzsgavdnp
  • SHA256 375dbccaa8451b917097b50444b2ddeb9e43402172b6908e1182795dbae75904
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Blocklisted process makes network request 2 IoCs
  • 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 System32 directory 1 IoCs
  • Drops file in Windows directory 13 IoCs
  • Loads dropped DLL 4 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Event Triggered Execution: Installer Packages 1 TTPs 1 IoCs
  • Modifies data under HKEY_USERS 43 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\375dbccaa8451b917097b50444b2ddeb9e43402172b6908e1182795dbae75904.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2932
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2956
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding C7E1A13122B185170321C1DB577DB2BA
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2716
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        -NoProfile -Noninteractive -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\Temp\pss2447.ps1" -propFile "C:\Users\Admin\AppData\Local\Temp\msi23E5.txt" -scriptFile "C:\Users\Admin\AppData\Local\Temp\scr23F6.ps1" -scriptArgsFile "C:\Users\Admin\AppData\Local\Temp\scr23F7.txt" -propSep " :<->: " -lineSep " <<:>> " -testPrefix "_testValue."
        3⤵
        • Blocklisted process makes network request
        • Drops file in System32 directory
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1512
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2660
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "0000000000000570" "00000000000003E0"
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:2436

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        f761f67.rbs

        • Path C:\Config.Msi\f761f67.rbs
        • Size 655KB
        • SHA256 7cf8b012f7100890a6bc93bb7c15f73a318a9cfbf38c77c9fc2ea0cc3b4da259
        • MD5 SHA1 SHA512 SSDEEP

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
        • Size 70KB
        • SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
        • MD5 SHA1 SHA512 SSDEEP

        Tar3412.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\Tar3412.tmp
        • Size 181KB
        • SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
        • MD5 SHA1 SHA512 SSDEEP

        pss2447.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\pss2447.ps1
        • Size 6KB
        • SHA256 53094df6fa4e57a3265ff04bc1e970c10bcdb3d4094ad6dd610c05b7a8b79e0f
        • MD5 SHA1 SHA512 SSDEEP

        scr23F6.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\scr23F6.ps1
        • Size 1KB
        • SHA256 3841721b0494fc9c5367c78122caef55faa0dfd94195800974ab9528f2ac86ee
        • MD5 SHA1 SHA512

        MSI1FB1.tmp

        • Path C:\Windows\Installer\MSI1FB1.tmp
        • Size 588KB
        • SHA256 39fd8d36f8e5d915ad571ea429db3c3de6e9c160dbea7c3e137c9ba4b7fd301d
        • MD5 SHA1 SHA512 SSDEEP

        MSI22C2.tmp

        • Path \Windows\Installer\MSI22C2.tmp
        • Size 649KB
        • SHA256 7a23e492658e6d38873f3ad82f41ec1fa45102da59fa8d87595d85dafca6fa98
        • MD5 SHA1 SHA512 SSDEEP