Analysis

  • max time kernel
    148s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    05/07/2026, 06:24

General

  • Target
    CH341-USB-Serial-Drivers.exe
  • Size 2.2MB
  • Sample260705-g6ecfaaw8t
  • SHA256 2d4f8c3c6e4ec3c2bc278fab74bfc6a739b1c22f1ab735ed94a5a1a62648a6b0
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Drops file in Drivers directory 13 IoCs
  • Executes dropped EXE 3 IoCs
  • Drops file in System32 directory 54 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Inno Setup is an open-source installation builder for Windows applications. 3 IoCs

    Inno Setup installer

  • Checks SCSI registry key(s) 3 TTPs 32 IoCs

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

  • Modifies data under HKEY_USERS 41 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 23 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\CH341-USB-Serial-Drivers.exe
    "C:\Users\Admin\AppData\Local\Temp\CH341-USB-Serial-Drivers.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2512
    • C:\Users\Admin\AppData\Local\Temp\is-XBADUI1P8J.tmp\CH341-USB-Serial-Drivers.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-XBADUI1P8J.tmp\CH341-USB-Serial-Drivers.tmp" /SL5="$70252,1088934,842752,C:\Users\Admin\AppData\Local\Temp\CH341-USB-Serial-Drivers.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:5896
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -File "C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\Install-CH341SER-Auto.ps1" -NoPause
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1732
        • C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\SETUP.EXE
          "C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\SETUP.EXE" /S
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4444
          • C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\DRVSETUP64\DRVSETUP64.EXE
            C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\DRVSETUP64\DRVSETUP64.EXE \s
            5⤵
            • Drops file in Drivers directory
            • Executes dropped EXE
            • Drops file in System32 directory
            • Drops file in Windows directory
            • Checks SCSI registry key(s)
            • Suspicious use of AdjustPrivilegeToken
            PID:1300
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "4" "0" "C:\Users\Admin\AppData\Local\Temp\{536f6678-054f-9543-b2ad-b2e69d956042}\CH341SER.INF" "9" "4a6a21c03" "0000000000000188" "WinSta0\Default" "0000000000000130" "208" "C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\WIN 1X"
    1⤵
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Checks SCSI registry key(s)
    • Modifies data under HKEY_USERS
    PID:6396

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        CH341PT.DLL

        • Path C:\Users\Admin\AppData\Local\Temp\IS-I0T~1.TMP\CH341SER\WIN1X~1\CH341PT.DLL
        • Size 58KB
        • SHA256 4fae54a4cc5cbfd5bd0a59b6aff3f888bebeb3c78521dadcdd1247b40012c580
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CH341P~1.DLL

        • Path C:\Users\Admin\AppData\Local\Temp\IS-I0T~1.TMP\CH341SER\WIN1X~1\CH341P~1.DLL
        • Size 69KB
        • SHA256 7e2169a614c608475921c45ca9d73ad63cb3bc82b2198197e6aecb969b9ed0e4
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CH341P~2.DLL

        • Path C:\Users\Admin\AppData\Local\Temp\IS-I0T~1.TMP\CH341SER\WIN1X~1\CH341P~2.DLL
        • Size 81KB
        • SHA256 16ad9a058df6b58ce8259e086275b81f663f43202a2b7f0da7a634c356203e1d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CH341P~3.DLL

        • Path C:\Users\Admin\AppData\Local\Temp\IS-I0T~1.TMP\CH341SER\WIN1X~1\CH341P~3.DLL
        • Size 76KB
        • SHA256 9f8b6dbe2b81a720184f0a0a269e17a90ed6da9ecbb3fa3d9fa32d2b95ab1adc
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CH341S64.SYS

        • Path C:\Users\Admin\AppData\Local\Temp\IS-I0T~1.TMP\CH341SER\WIN1X~1\CH341S64.SYS
        • Size 82KB
        • SHA256 a8cb7cf5050f9d14106b27d45d50dfb85f6cb119c0e871e673743ad62ecaeed0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CH341SER.SYS

        • Path C:\Users\Admin\AppData\Local\Temp\IS-I0T~1.TMP\CH341SER\WIN1X~1\CH341SER.SYS
        • Size 62KB
        • SHA256 2e8a6011677450461adc019a3bcc1829424924cf0ee91906ce0e05ccecff370f
        • MD5 SHA1 SHA512 SSDEEP TLSH

        __PSScriptPolicyTest_3ppw231q.pkk.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3ppw231q.pkk.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512 TLSH

        CH341SER.CAT

        • Path C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\CH341SER.CAT
        • Size 14KB
        • SHA256 b44f551843d0e36319ab4e911d4579a866b175201980daa9e8973919ad3fb1fe
        • MD5 SHA1 SHA512 SSDEEP TLSH

        DRVSETUP64.EXE

        • Path C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\DRVSETUP64\DRVSETUP64.EXE
        • Size 52KB
        • SHA256 b5d55fa31753fcd86145c460d644bac78f171f51d708a050326234b4a2876c4c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Install-CH341SER-Auto.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\Install-CH341SER-Auto.ps1
        • Size 5KB
        • SHA256 1d7988c1d9efcf4a05e2cfa60c139612aaae7e0dab640e085532675c134c60ed
        • MD5 SHA1 SHA512 SSDEEP TLSH

        SETUP.EXE

        • Path C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\SETUP.EXE
        • Size 90KB
        • SHA256 b89fd6c6a1eb20df0fb347e9af5e935be2e6f2e2915b984543c0532e6d0ffaa2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CH341SER.INF

        • Path C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\WIN 1X\CH341SER.INF
        • Size 9KB
        • SHA256 fb573086ee1b6f65d68a330cc4b48350439e3327c85292fc455b3588dff053a3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ch341ser-auto-20260705-072457.log

        • Path C:\Users\Admin\AppData\Local\Temp\is-I0TUDQ9PAC.tmp\CH341SER\logs\ch341ser-auto-20260705-072457.log
        • Size 329B
        • SHA256 f30f96f2cbaf41c27e4c8012b897490d30826a8887871fc58760a18519fce0b8
        • MD5 SHA1 SHA512 TLSH

        CH341-USB-Serial-Drivers.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\is-XBADUI1P8J.tmp\CH341-USB-Serial-Drivers.tmp
        • Size 4.1MB
        • SHA256 aceb078799a88255882e3344a0213f625f8836def840fb673bb60af8c94de9a0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ch341ser.inf_amd64_34a3206305b40d57.ini

        • Path C:\Windows\System32\DriverStore\FileRepository\ch341ser.inf_amd64_34a3206305b40d57.ini
        • Size 768B
        • SHA256 a3a2a7cd0ec1c56965643cb0cf65bdd99339c7b044cb6a85d47e5ecd4cc1f045
        • MD5 SHA1 SHA512 TLSH

        memory/1732-76-0x0000000005D20000-0x0000000005D86000-memory.dmp

        memory/1732-86-0x00000000062C0000-0x00000000062DE000-memory.dmp

        memory/1732-143-0x0000000072CA0000-0x000000007345C000-memory.dmp

        memory/1732-87-0x00000000067E0000-0x000000000682C000-memory.dmp

        memory/1732-91-0x0000000007460000-0x00000000074F6000-memory.dmp

        memory/1732-92-0x00000000073F0000-0x000000000740A000-memory.dmp

        memory/1732-93-0x0000000007500000-0x0000000007522000-memory.dmp

        memory/1732-94-0x0000000007AF0000-0x00000000080AA000-memory.dmp

        memory/1732-95-0x0000000008730000-0x0000000008DAC000-memory.dmp

        memory/1732-99-0x000000006F710000-0x000000006F75C000-memory.dmp

        memory/1732-98-0x0000000007710000-0x0000000007746000-memory.dmp

        memory/1732-101-0x0000000072CA0000-0x000000007345C000-memory.dmp

        memory/1732-106-0x0000000072CA0000-0x000000007345C000-memory.dmp

        memory/1732-108-0x00000000076F0000-0x0000000007710000-memory.dmp

        memory/1732-109-0x0000000007760000-0x0000000007803000-memory.dmp

        memory/1732-110-0x0000000007880000-0x000000000788A000-memory.dmp

        memory/1732-111-0x00000000079E0000-0x00000000079F1000-memory.dmp

        memory/1732-140-0x0000000072CA0000-0x000000007345C000-memory.dmp

        memory/1732-75-0x00000000054F0000-0x0000000005512000-memory.dmp

        memory/1732-115-0x0000000072CA0000-0x000000007345C000-memory.dmp

        memory/1732-139-0x0000000072CB2000-0x0000000072CB3000-memory.dmp

        memory/1732-83-0x0000000005E00000-0x000000000615B000-memory.dmp

        memory/1732-84-0x0000000072CA0000-0x000000007345C000-memory.dmp

        memory/1732-77-0x0000000005D90000-0x0000000005DF6000-memory.dmp

        memory/1732-74-0x0000000072CA0000-0x000000007345C000-memory.dmp

        memory/1732-73-0x00000000056D0000-0x0000000005D1A000-memory.dmp

        memory/1732-72-0x0000000002F10000-0x0000000002F46000-memory.dmp

        memory/1732-71-0x0000000072CB2000-0x0000000072CB3000-memory.dmp

        memory/2512-0-0x0000000000810000-0x00000000008EC000-memory.dmp

        memory/2512-88-0x0000000000810000-0x00000000008EC000-memory.dmp

        memory/2512-148-0x0000000000810000-0x00000000008EC000-memory.dmp

        memory/5896-70-0x0000000002E50000-0x0000000002E51000-memory.dmp

        memory/5896-89-0x0000000000980000-0x0000000000DB7000-memory.dmp

        memory/5896-145-0x0000000000980000-0x0000000000DB7000-memory.dmp

        memory/5896-6-0x0000000002E50000-0x0000000002E51000-memory.dmp

        memory/5896-147-0x0000000000980000-0x0000000000DB7000-memory.dmp