flyagent | 450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe

Analysis

max time kernel
48s
max time network
147s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
09/10/2026, 07:03

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General

Target
450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe
Size 1.3MB
Sample261009-hvthnazzhs
SHA256 450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe
MD5 528a6cb9862c742372fb9527c98fa310
SHA1 1961e98246193add805a6ff8572fff648b3da110
SHA512 3679257839fb7e862c345dade5e78fd2f7f5921c82097088f0f288e8dc16473385625869c665d969384a09f919e77d97e743416b059ffc706ff539da89e96853
SSDEEP 24576:WBS9qQEK6QywlBqH82QoXFkrzkmmlSgRDko0lG4Z8r7Qfd7iu5k:WZaClSFlG4ZM7QlVS
TLSH
T10E557C13F692C0F1E61C227124FB6339BE7497450A71CACBE794DD791C32691ABA720E
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 1 IoCs

resource	yara_rule
behavioral2/memory/3648-17-0x0000000000400000-0x0000000000551000-memory.dmp	flyagent

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

execution

Visual Basic

T1059.005

pid	Process
3500	WScript.exe
5292	WScript.exe

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

System Information Discovery
T1082

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WScript.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WScript.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WScript.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WScript.exe

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	450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.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-1-5-21-4154726816-2055034831-2297277433-1000_Classes\Local Settings	450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3648	450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe
3648	450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe
3648	450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe
3648	450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
3648	450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3648	450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe
3648	450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3648 wrote to memory of 5292	3648	450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe	91
PID 3648 wrote to memory of 3500	3648	450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe	92

C:\Users\Admin\AppData\Local\Temp\450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.exe
"C:\Users\Admin\AppData\Local\Temp\450d39fe36a8670e691ad90094171cc1ab616ec67aa77ea147983c3a3c9a7bfe.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:3648
- 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.
  - Reads the TCP/IP host and domain name from the registry
  - System Location Discovery: System Language Discovery
  PID:5292
- 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.
  - Reads the TCP/IP host and domain name from the registry
  - System Location Discovery: System Language Discovery
  PID:3500

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:5708

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

System Network Configuration Discovery

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

VBS3.vbs

Path C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs
Size 753B
SHA256 3fe4d4912905706109fed5c2dc158197951342ec87ba7da77b2ddf72db7e3e21
MD5 060b8c69f499f3a2b96edae4e63a9106
SHA1 65a2c88bd56a611411a8c3ada94ce68a1f7f31ba
SHA512 76848f85d8637cec7a96bd3766af582919fb7f3f029337ed4041657fc431130200b4fda7c2af97254e121e982c7d1bb785d7d0b046f8c4b6f4da90f70a3d6cac
TLSH
T19B01C010DD4CC25D503557752932E44BF7E91513A303ACE87856D1662F707689CB4A37
MD5 SHA1 SHA512 TLSH

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memory/3648-17-0x0000000000400000-0x0000000000551000-memory.dmp

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