flyagent | 6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441

Analysis

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

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
07/08/2026, 09:12

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General

Target
6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe
Size 1.4MB
Sample260807-k6bs4avsdx
SHA256 6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441
MD5 95288ff3e53bf33f7673fcde9c0d31e8
SHA1 f86855c0b1cba2e858999e7fdb93d9361b94e645
SHA512 278f22c8bd19e30c5bf4b9ea6252245430464159ef5d0c96fff4bfeee450aa50281c1a8542f962fbe2711e25f93378cc028c87fc08e7285b0ad3fd55b3de1087
SSDEEP 24576:GH0dl8myX9Bg42QoXFkrzkmplSgRDYo0lG4Z8r7Qfbkiu5Q/:GcallSllG4ZM7QzMY
TLSH
T160658D13F292C0F1E61C227124FB6339BE749B450A71CAC7EB95DD791C32691AB6720E
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/1628-0-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/1628-18-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/1628-19-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent

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

execution

Visual Basic

T1059.005

pid	Process
5652	WScript.exe
3624	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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.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-1-5-21-3989226554-2204910950-1522900112-1000_Classes\Local Settings	6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1628	6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe
1628	6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe
1628	6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe
1628	6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1628	6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1628	6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe
1628	6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1628 wrote to memory of 3624	1628	6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe	89
PID 1628 wrote to memory of 5652	1628	6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe	90

C:\Users\Admin\AppData\Local\Temp\6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.exe
"C:\Users\Admin\AppData\Local\Temp\6f8592138d697b8c61e5137a28bfab9d20098b4dbbb600cbced6681bddcb9441.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:1628
- 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:3624
- 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:5652

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 082a6d14019ff0e47f5171143b1011cfcfa76c773cb16f830a036e0e7d448e6f
MD5 9ac0b7c7990ed654394aa9ef01e96973
SHA1 0ff622e15fc69e030d67e6247e85800971f024f2
SHA512 98b9d769cd52f0dbc714be8881966f3cc9b08bb5c184d1930e75b2392ffe0221230c99fa0e9d2ae89f82fbcf7bc6eb027e30e9cd29ec6f34e683f7a1a03672ff
TLSH
T11601CB04DD5C8258507557753432A80FF7AE1543A303ACD8B899D1A13F707A89CB5A36
MD5 SHA1 SHA512 TLSH

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memory/1628-0-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/1628-18-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/1628-19-0x0000000000400000-0x000000000055F000-memory.dmp

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