flyagent | a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07

Analysis

max time kernel
46s
max time network
134s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/08/2026, 11:14

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General

Target
a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe
Size 1.1MB
Sample260804-ncdx5svsby
SHA256 a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07
MD5 5d0df3353f3793f740c7b95da6e58e44
SHA1 91d066ef78f5b8417d87084103c6dfdbbb0a6f70
SHA512 cf96b0c5188d925c54c0eb0e89a1f6d56ad6370c4496b8ac79d2e50d79400d7ac7bfef917f34627524a8de0e39f9c5d2944ba644d3e98fd16669bb0e953a6667
SSDEEP 24576:aH0dl8myX9Bg42QoXFkrzkmplSgRDYo0lG4Z8r7Qfbkiu5Qf:acallSllG4ZM7QzMi
TLSH
T1E3458D13F292C0F1E61C227124FB6739BE749B450A71CAC7EB94DD791C32691AB6720E
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor discovery execution flyagent

Malware Config

Signatures

Family: FlyAgent
FlyAgent is a backdoor written in C++.
backdoor flyagent

Detects FlyAgent Backdoor 3 IoCs

resource	yara_rule
behavioral2/memory/4944-0-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/4944-18-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/4944-26-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent

Executes a VBScript file via the Windows Script Host. 1 TTPs 2 IoCs

execution

Visual Basic

T1059.005

pid	Process
3240	WScript.exe
4324	WScript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3986082593-3624157295-3514260330-1000_Classes\Local Settings	a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4944	a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe
4944	a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe
4944	a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe
4944	a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4944	a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4944	a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe
4944	a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4944 wrote to memory of 4324	4944	a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe	88
PID 4944 wrote to memory of 3240	4944	a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe	89

C:\Users\Admin\AppData\Local\Temp\a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.exe
"C:\Users\Admin\AppData\Local\Temp\a1c842f37ee2486f19e6ab1fa1392870014e97b6e89c5dc5351ee9498d34bd07.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
PID:4944
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"
  2⤵
  - Executes a VBScript file via the Windows Script Host.
  - System Location Discovery: System Language Discovery
  PID:4324
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"
  2⤵
  - Executes a VBScript file via the Windows Script Host.
  - System Location Discovery: System Language Discovery
  PID:3240

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Visual Basic

T1059.005

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

VBS3.vbs

Path C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs
Size 753B
SHA256 307417dc7fc39b13b4332538a78fa20147980f3f8624ff806ea5bcbdbb6d000d
MD5 c581ece42c231356156d69b0813b0376
SHA1 00b789f272371b11425a08c562e9cbd3576a16dc
SHA512 e157eeac728ff9aff6f414a713e0526f240f8cc75af7f322154b4cd282bd1100b7a74e8d0da315f56a7b28342380b300f704526e51656a95daf8920947aca4c8
TLSH
T16D01CB10DE8CC25D603553BA2572A44EF3EE1603A303ACD9B899C1A52FB0658DDB0A32
MD5 SHA1 SHA512 TLSH

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memory/4944-0-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/4944-18-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/4944-26-0x0000000000400000-0x000000000055F000-memory.dmp

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