Analysis
- user interaction
yes - max time kernel
22s - max time network
42s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
19/08/2026, 00:12
General
- Target BossFixAgent.exe
- Size 7.5MB
- Sample260819-ahcelstbpe
- SHA256 2c6fb933d140bfd8c92390e9f08113f62bff42c861da29105b20d9980f2e49ca
Malware Config
Signatures
- Creates a file in the Startup directory 1 TTPs 1 IoCs
A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.
- Executes dropped EXE 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Looks up external IP address via web service 1 TTPs 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Hide Artifacts: Hidden Files and Directories 1 TTPs 2 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
- Enumerates system info in registry 2 TTPs 4 IoCs
- GoLang User-Agent 1 IoCs
Uses default user-agent string defined by GoLang HTTP packages.
- 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 3 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 6 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.
- Views/modifies file attributes 1 TTPs 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\BossFixAgent.exe"C:\Users\Admin\AppData\Local\Temp\BossFixAgent.exe"1⤵
- Adds Run key to start application
- Enumerates system info in registry
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cmd.execmd /c attrib +h +s +i C:\Users\Admin\AppData\Roaming\BossFix\BossFixAgent.exe2⤵
- Hide Artifacts: Hidden Files and Directories
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\attrib.exeattrib +h +s +i C:\Users\Admin\AppData\Roaming\BossFix\BossFixAgent.exe3⤵
- Views/modifies file attributes
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-
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C:\Windows\system32\schtasks.exeschtasks /Create /F /TN BossFixAgentUpdate /TR \"C:\Users\Admin\AppData\Roaming\BossFix\BossFixAgent.exe\" /SC ONLOGON /RL LIMITED2⤵
- Scheduled Task/Job: Scheduled Task
-
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -NoProfile -NonInteractive -ExecutionPolicy Bypass -Command "$ws = New-Object -ComObject WScript.Shell; $s = $ws.CreateShortcut('C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\BossFixAgent.exe.lnk'); $s.TargetPath = 'C:\Users\Admin\AppData\Roaming\BossFix\BossFixAgent.exe'; $s.WorkingDirectory = 'C:\Users\Admin\AppData\Roaming\BossFix'; $s.Save()"2⤵
- Creates a file in the Startup directory
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\cmd.execmd /c attrib +h +s +i C:\Users\Admin\AppData\Roaming\BossFix2⤵
- Hide Artifacts: Hidden Files and Directories
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\attrib.exeattrib +h +s +i C:\Users\Admin\AppData\Roaming\BossFix3⤵
- Views/modifies file attributes
-
-
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C:\Users\Admin\AppData\Roaming\BossFix\BossFixAgent.exe"C:\Users\Admin\AppData\Roaming\BossFix\BossFixAgent.exe"1⤵
- Executes dropped EXE
- Enumerates system info in registry
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Hide Artifacts
2Hidden Files and Directories
2Modify Registry
1Replay Monitor
Loading Replay Monitor...
Downloads
BossFixAgent.exe
memory/5792-3-0x00007FFF9ED3F000-0x00007FFF9ED40000-memory.dmp
memory/5792-4-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-7-0x00000205E15E0000-0x00000205E1602000-memory.dmp
memory/5792-8-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-9-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-10-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-11-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-12-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-13-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-15-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-17-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-18-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-19-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-20-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-22-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp
memory/5792-23-0x00007FFF9EBB0000-0x00007FFF9F554000-memory.dmp