Analysis

  • user interaction
    yes
  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260706-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260706-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/07/2026, 12:30

General

  • Target
    FluxusZ Windows 1.2.5_51322530.exe
  • Size 702KB
  • Sample260708-ppm71sfw7x
  • SHA256 35d5cdf23553b14ad8051f68b1af8199805f06479391888f609af4ed54ed5a63
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 2 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 21 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies trusted root certificate store through registry 1 TTPs 7 IoCs

    A root certificate was added, modified, or removed in the trusted certificate store registry paths.

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • Modifies data under HKEY_USERS 40 IoCs
  • Modifies registry class 5 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs -p -s Schedule
    1⤵
    • Executes dropped EXE
    PID:1724
  • C:\Users\Admin\AppData\Local\Temp\FluxusZ Windows 1.2.5_51322530.exe
    "C:\Users\Admin\AppData\Local\Temp\FluxusZ Windows 1.2.5_51322530.exe"
    1⤵
    • Modifies registry class
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:916
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\file.txt
      2⤵
      • Opens file in notepad (likely ransom note)
      PID:4588
    • C:\Users\Admin\AppData\Local\Temp\PremierOpinion\ContentI3.exe
      "C:\Users\Admin\AppData\Local\Temp\PremierOpinion\ContentI3.exe" -c:1538 -t:InstallUnion
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:468
      • C:\Program Files (x86)\PremierOpinion\pmropn.exe
        C:\Program Files (x86)\PremierOpinion\pmropn.exe -install -uninst:PremierOpinion -t:InstallUnion -bid:KuwWdrYy4lkGrTh8rJPOPN -o:0
        3⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Modifies trusted root certificate store through registry
        • System Location Discovery: System Language Discovery
        • Modifies system certificate store
        PID:2756
  • C:\Program Files (x86)\PremierOpinion\pmservice.exe
    "C:\Program Files (x86)\PremierOpinion\pmservice.exe" /service
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Modifies trusted root certificate store through registry
    • System Location Discovery: System Language Discovery
    • Modifies data under HKEY_USERS
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4292
    • C:\Windows\system32\rundll32.exe
      C:\Windows\system32\rundll32.exe C:\Windows\system32\pmls64.dll,UpdateProcess 1724
      2⤵
      • Loads dropped DLL
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3940
    • C:\Windows\SysWOW64\reg.exe
      reg.exe EXPORT "HKLM\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{eeb86aef-4a5d-4b75-9d74-f16d438fc286}" C:\PROGRA~2\PREMIE~1\RData.reg /y
      2⤵
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      PID:2760
    • \??\c:\program files (x86)\premieropinion\pmropn.exe
      "c:\program files (x86)\premieropinion\pmropn.exe" -boot
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:4404
    • \??\c:\program files (x86)\premieropinion\pmropn.exe
      "c:\program files (x86)\premieropinion\pmropn.exe" -boot
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:5344

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        cacert.pem

        • Path C:\Program Files (x86)\PremierOpinion\cacert.pem
        • Size 3KB
        • SHA256 9f19e7a7139cca8373b516ab1ae49c644aa1c8048e8c7aa5784774a081dcbb87
        • MD5 SHA1 SHA512 TLSH

        ContentI3.exe

        • Path C:\Users\Admin\AppData\Local\Temp\PremierOpinion\ContentI3.exe
        • Size 3.8MB
        • SHA256 ef2734657b11113a433abb7ebac962e2bf6bf685f05c5f672997f01875430168
        • MD5 SHA1 SHA512 SSDEEP TLSH

        pmls.dll

        • Path C:\Users\Admin\AppData\Local\Temp\~os1F6C.tmp\pmls.dll
        • Size 884KB
        • SHA256 e471da417462c9f60181c27efe2355db4f0b3b4df6bd0d4097864a72677d8e5d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        pmls64.dll

        • Path C:\Users\Admin\AppData\Local\Temp\~os1F6C.tmp\pmls64.dll
        • Size 1.1MB
        • SHA256 877c2894f42bf078dfa36f06b543490d800a32c4f5245464bfec300b56867661
        • MD5 SHA1 SHA512 SSDEEP TLSH

        pmph.dll

        • Path C:\Users\Admin\AppData\Local\Temp\~os1F6C.tmp\pmph.dll
        • Size 806KB
        • SHA256 7cdd0b4b6492483d07ddd1869ea4c213d8d5043aec14117b1a5926093bedc7e1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        pmropn.exe

        • Path C:\Users\Admin\AppData\Local\Temp\~os1F6C.tmp\pmropn.exe
        • Size 7.4MB
        • SHA256 b8e134c1518903be8b260f821d1896b521f7f70956090562b3cc71b71bf8cb1b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        pmropn32.exe

        • Path C:\Users\Admin\AppData\Local\Temp\~os1F6C.tmp\pmropn32.exe
        • Size 244KB
        • SHA256 b56a74fbe9b0a0c027f230a412dd69afbb697c41f31635352b37fe74d334fc15
        • MD5 SHA1 SHA512 SSDEEP TLSH

        pmropn64.exe

        • Path C:\Users\Admin\AppData\Local\Temp\~os1F6C.tmp\pmropn64.exe
        • Size 303KB
        • SHA256 f6de7618e24c0731e5ff77aa56f200d3c0e30e672a63c7d11b9717ece29e6814
        • MD5 SHA1 SHA512 SSDEEP TLSH

        pmservice.exe

        • Path C:\Users\Admin\AppData\Local\Temp\~os1F6C.tmp\pmservice.exe
        • Size 4.6MB
        • SHA256 f76c45ac8440c5a36096d7956bdf933bfff268469d1a73573c7f001f790dafa1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        file.txt

        • Path C:\Users\Admin\AppData\Local\file.txt
        • Size 58B
        • SHA256 3928ca0335595047d82c7f2177b5859d18b802a33aa319bac7ba8b14c8ebc9c5
        • MD5 SHA1 SHA512 TLSH

        memory/3940-107-0x00007FFFECA70000-0x00007FFFECB37000-memory.dmp

        memory/3940-109-0x00007FFFED010000-0x00007FFFED084000-memory.dmp

        memory/3940-108-0x00007FFFEACD0000-0x00007FFFEB071000-memory.dmp

        memory/3940-112-0x00007FFFE3720000-0x00007FFFE3846000-memory.dmp

        memory/3940-113-0x00007FFFE9A10000-0x00007FFFE9A58000-memory.dmp

        memory/3940-111-0x00007FFFE9C70000-0x00007FFFE9CD8000-memory.dmp

        memory/3940-110-0x00007FFFD77E0000-0x00007FFFD7A63000-memory.dmp

        memory/3940-114-0x00007FFFEB8F0000-0x00007FFFEBFE6000-memory.dmp