Analysis
- max time kernel
149s - max time network
116s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
21/04/2026, 23:14
General
- Target b906e3cf3fdea849de9bfae1672b00669e6760d326a5a672bfb9eaf8c4d4ca4e.exe
- Size 1.1MB
- Sample260421-28ca3sg15v
- SHA256 b906e3cf3fdea849de9bfae1672b00669e6760d326a5a672bfb9eaf8c4d4ca4e
Malware Config
Signatures
- Family: FlyAgent
FlyAgent is a backdoor written in C++.
- Detects FlyAgent Backdoor 15 IoCs
- Deletes itself 1 IoCs
- Executes dropped EXE 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 11 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Modifies registry class 8 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: RenamesItself 1 IoCs
- Suspicious use of SetWindowsHookEx 10 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\b906e3cf3fdea849de9bfae1672b00669e6760d326a5a672bfb9eaf8c4d4ca4e.exe"C:\Users\Admin\AppData\Local\Temp\b906e3cf3fdea849de9bfae1672b00669e6760d326a5a672bfb9eaf8c4d4ca4e.exe"1⤵
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"2⤵
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"2⤵
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"3⤵
- Deletes itself
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"4⤵
- System Location Discovery: System Language Discovery
- Modifies registry class
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"4⤵
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"5⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"6⤵
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"7⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"6⤵
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"7⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
Config.ini
VBS3.vbs
VBS3.vbs
VBS3.vbs
svchcst.exe
svchcst.exe
svchcst.exe
memory/2012-83-0x0000000003070000-0x0000000003131000-memory.dmp
memory/2012-84-0x0000000004610000-0x0000000004678000-memory.dmp
memory/2288-34-0x00000000031A0000-0x00000000031AE000-memory.dmp
memory/2288-61-0x0000000002970000-0x0000000002A31000-memory.dmp
memory/2288-62-0x0000000004EF0000-0x0000000004F09000-memory.dmp
memory/2288-37-0x00000000031A0000-0x00000000031AE000-memory.dmp
memory/2340-59-0x0000000005FF0000-0x0000000006009000-memory.dmp
memory/2340-33-0x0000000003900000-0x000000000390E000-memory.dmp
memory/2340-36-0x0000000003900000-0x000000000390E000-memory.dmp
memory/2340-57-0x00000000037D0000-0x0000000003891000-memory.dmp
memory/2340-58-0x0000000005D80000-0x0000000005D95000-memory.dmp
memory/3508-85-0x00000000009C0000-0x0000000000A81000-memory.dmp
memory/3508-86-0x0000000000400000-0x000000000055F000-memory.dmp
memory/3508-76-0x0000000000400000-0x000000000055F000-memory.dmp
memory/3676-73-0x0000000000400000-0x000000000055F000-memory.dmp
memory/3676-55-0x0000000000400000-0x000000000055F000-memory.dmp
memory/3676-72-0x0000000000980000-0x0000000000A41000-memory.dmp
memory/4908-20-0x0000000003140000-0x0000000003201000-memory.dmp
memory/4956-13-0x0000000000400000-0x000000000055F000-memory.dmp
memory/4956-11-0x0000000000400000-0x000000000055F000-memory.dmp
memory/4956-12-0x0000000000C20000-0x0000000000CE1000-memory.dmp
memory/4956-17-0x0000000000400000-0x000000000055F000-memory.dmp
memory/4956-0-0x0000000000400000-0x000000000055F000-memory.dmp
memory/4956-16-0x0000000000C20000-0x0000000000CE1000-memory.dmp
memory/5276-41-0x0000000000A10000-0x0000000000AD1000-memory.dmp
memory/5276-52-0x0000000000400000-0x000000000055F000-memory.dmp
memory/5276-32-0x0000000000400000-0x000000000055F000-memory.dmp
memory/5276-51-0x0000000000A10000-0x0000000000AD1000-memory.dmp
memory/5276-31-0x0000000000A10000-0x0000000000AD1000-memory.dmp
memory/5920-80-0x0000000004EB0000-0x0000000004F18000-memory.dmp
memory/5920-79-0x0000000002F70000-0x0000000003031000-memory.dmp
memory/5956-82-0x0000000000400000-0x000000000055F000-memory.dmp
memory/5956-78-0x0000000000400000-0x000000000055F000-memory.dmp
memory/5956-81-0x0000000000980000-0x0000000000A41000-memory.dmp