Analysis
- max time kernel
73s - max time network
108s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
21/04/2026, 08:51
General
- Target d55df7fb63670337b47c25c6cec7a00d649e007f191b7241b996d30970de936d.exe
- Size 1.3MB
- Sample260421-kr7bfsev5x
- SHA256 d55df7fb63670337b47c25c6cec7a00d649e007f191b7241b996d30970de936d
Malware Config
Signatures
- Family: FlyAgent
FlyAgent is a backdoor written in C++.
- Detects FlyAgent Backdoor 8 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\d55df7fb63670337b47c25c6cec7a00d649e007f191b7241b996d30970de936d.exe"C:\Users\Admin\AppData\Local\Temp\d55df7fb63670337b47c25c6cec7a00d649e007f191b7241b996d30970de936d.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
-
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
-
-
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
-
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
-
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
-
-
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
-
C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"5⤵
-
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"6⤵
-
C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"7⤵
-
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"8⤵
-
-
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"8⤵
-
C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"9⤵
-
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"10⤵
-
C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"11⤵
-
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"12⤵
-
-
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"12⤵
-
-
-
-
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"10⤵
-
-
-
-
-
-
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"6⤵
-
-
-
-
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
Config.ini
VBS3.vbs
VBS3.vbs
VBS3.vbs
VBS3.vbs
VBS3.vbs
VBS3.vbs
svchcst.exe
svchcst.exe
svchcst.exe
svchcst.exe
svchcst.exe
memory/1096-115-0x0000000005C40000-0x0000000005CC8000-memory.dmp
memory/1096-109-0x0000000001530000-0x0000000001555000-memory.dmp
memory/1096-116-0x0000000005CD0000-0x0000000005CED000-memory.dmp
memory/1472-96-0x00000000049E0000-0x0000000004A48000-memory.dmp
memory/1472-87-0x0000000000B80000-0x0000000000BA5000-memory.dmp
memory/1800-13-0x0000000001780000-0x00000000017A5000-memory.dmp
memory/1900-68-0x0000000000990000-0x00000000009B5000-memory.dmp
memory/1900-71-0x0000000000990000-0x00000000009B5000-memory.dmp
memory/2152-12-0x00000000011E0000-0x0000000001205000-memory.dmp
memory/2692-98-0x0000000004F10000-0x0000000004F78000-memory.dmp
memory/2692-88-0x00000000007F0000-0x0000000000815000-memory.dmp
memory/2776-11-0x0000000000C20000-0x0000000000C45000-memory.dmp
memory/2776-36-0x0000000000C20000-0x0000000000C45000-memory.dmp
memory/2776-35-0x0000000000400000-0x0000000000551000-memory.dmp
memory/2776-14-0x0000000000400000-0x0000000000551000-memory.dmp
memory/2776-10-0x0000000000400000-0x0000000000551000-memory.dmp
memory/3248-86-0x0000000000AE0000-0x0000000000B05000-memory.dmp
memory/3248-92-0x0000000000AE0000-0x0000000000B05000-memory.dmp
memory/3288-75-0x0000000005C30000-0x0000000005CB8000-memory.dmp
memory/3288-69-0x0000000001610000-0x0000000001635000-memory.dmp
memory/3516-70-0x0000000000D80000-0x0000000000DA5000-memory.dmp
memory/3696-51-0x0000000000BB0000-0x0000000000BD5000-memory.dmp
memory/4108-58-0x0000000005850000-0x00000000058D8000-memory.dmp
memory/4108-57-0x0000000001350000-0x0000000001375000-memory.dmp
memory/4112-108-0x00000000008B0000-0x00000000008D5000-memory.dmp
memory/4112-111-0x00000000008B0000-0x00000000008D5000-memory.dmp
memory/4468-54-0x0000000001100000-0x0000000001125000-memory.dmp
memory/4468-55-0x0000000005620000-0x00000000056A8000-memory.dmp
memory/4468-56-0x0000000005950000-0x0000000005958000-memory.dmp
memory/4500-110-0x0000000000A60000-0x0000000000A85000-memory.dmp