flyagent | f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778

Analysis

max time kernel
50s
max time network
126s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
31/08/2026, 04:12

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General

Target
f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe
Size 1.4MB
Sample260831-esttvsvbnb
SHA256 f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778
MD5 ae6e1f7b290b0174e02fb3eb7d2e4a41
SHA1 14f03f988fc9f8ef3fb15cbd5f5ec90dbb7cdc6d
SHA512 fc1da9f655119955afaf83ef40c54a8b0f6bcc6cee1624fa2b77ce9f258c04e9d5c91cfd30685fee74eabab5df32d2a1f20aafaeb194335ea94770d69b4b52a0
SSDEEP 24576:faMoNmfTEs86C9r5m84DVTh22rFvGf9VLegQEollG4uXpeTR6p:f0NeEs86FvMLejlG4uYi
TLSH
T187659E27E9C180F2C198107168AB1F35FEB456912E358B83A7D4EEB85F72790DA3721D
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/4932-16-0x0000000000400000-0x000000000056D000-memory.dmp	flyagent

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

execution

Visual Basic

T1059.005

pid	Process
3284	WScript.exe
628	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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2246396966-3025826688-3847171515-1000_Classes\Local Settings	f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4932	f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe
4932	f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe
4932	f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe
4932	f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4932	f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4932	f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe
4932	f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4932 wrote to memory of 628	4932	f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe	89
PID 4932 wrote to memory of 3284	4932	f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe	90

C:\Users\Admin\AppData\Local\Temp\f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.exe
"C:\Users\Admin\AppData\Local\Temp\f5d08fbc52fb9b05a732ea66fc8ac956588712cfe0b1bea96e2ec443d15d7778.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:4932
- 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:628
- 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:3284

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 7abe14d92201fb2c1d97768205e6c4696292aff491bad472d38d465e451e8894
MD5 2737feeca42a04d030375fc88be1775b
SHA1 2c8161f61d29f4bab3dc2b213aeb9f979988067c
SHA512 55c2382dc15f352cc2797b582929ee85696cb59077377722dd240de15f927029d33e60572689b1cbd6c6885e0a3279066ea26cb48efdc9dbb6e821ab7b938722
TLSH
T1AA01CB00DD8C8628503553766532E40EEBAA1553E303ACE87899D1A52FB0A689CB5A37
MD5 SHA1 SHA512 TLSH

Submit Download

memory/4932-16-0x0000000000400000-0x000000000056D000-memory.dmp

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