Analysis
- max time kernel
125s - max time network
152s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
16/04/2026, 21:35
General
- Target c4b40464da5ff62b2b224e0f5932faedbd6e79e9dad63bc899cfcf4b9200b73c.exe
- Size 1.4MB
- Sample260416-1fkw3set61
- SHA256 c4b40464da5ff62b2b224e0f5932faedbd6e79e9dad63bc899cfcf4b9200b73c
Malware Config
Signatures
- Family: FlyAgent
FlyAgent is a backdoor written in C++.
- Detects FlyAgent Backdoor 5 IoCs
- Deletes itself 1 IoCs
- Executes dropped EXE 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 registry class 4 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: RenamesItself 1 IoCs
- Suspicious use of SetWindowsHookEx 4 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\c4b40464da5ff62b2b224e0f5932faedbd6e79e9dad63bc899cfcf4b9200b73c.exe"C:\Users\Admin\AppData\Local\Temp\c4b40464da5ff62b2b224e0f5932faedbd6e79e9dad63bc899cfcf4b9200b73c.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
- 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"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
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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
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
Config.ini
VBS3.vbs
VBS3.vbs
svchcst.exe
memory/4984-20-0x0000000003BD0000-0x00000000041D2000-memory.dmp
memory/4988-19-0x0000000003CC0000-0x00000000042C2000-memory.dmp
memory/5064-15-0x0000000000400000-0x000000000055F000-memory.dmp
memory/5064-16-0x0000000000AD0000-0x00000000010D2000-memory.dmp
memory/5064-0-0x0000000000400000-0x000000000055F000-memory.dmp
memory/5064-12-0x0000000000AD0000-0x00000000010D2000-memory.dmp
memory/5064-11-0x0000000000400000-0x000000000055F000-memory.dmp
memory/5336-32-0x0000000000400000-0x000000000055F000-memory.dmp
memory/5336-31-0x0000000000AD0000-0x00000000010D2000-memory.dmp