flyagent | 64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd

Analysis

max time kernel
47s
max time network
126s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
15/10/2026, 08:51

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General

Target
64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe
Size 1.1MB
Sample261015-ksja1sys4k
SHA256 64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd
MD5 d6c3c69ff1c8fcc9a91798f323ca35b9
SHA1 f59502e8a94430e04fa4473e7c3fb7cf98d2b8df
SHA512 e430c189610610c68b72a7feaf1d99c59fc5e683fd0ddb3695266a6a26930aae35b44c9b73aef0d6bf4726b65fa8d9b695bd4610c68979608c3f9a1257262ad7
SSDEEP 24576:aH0dl8myX9Bg42QoXFkrzkmplSgRDYo0lG4Z8r7Qfbkiu5Qy:acallSllG4ZM7QzMv
TLSH
T153458D13F292C0F1E61C227124FB6739BE749B450A71CAC7E794DD791C32691ABA720E
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 2 IoCs

resource	yara_rule
behavioral2/memory/3528-0-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/3528-19-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent

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

execution

Visual Basic

T1059.005

pid	Process
856	WScript.exe
4088	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\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\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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000_Classes\Local Settings	64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3528	64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe
3528	64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe
3528	64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe
3528	64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
3528	64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3528	64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe
3528	64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3528 wrote to memory of 856	3528	64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe	89
PID 3528 wrote to memory of 4088	3528	64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe	88

C:\Users\Admin\AppData\Local\Temp\64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.exe
"C:\Users\Admin\AppData\Local\Temp\64b6d7fab059575dcaa81b9dd33c50d0d46a840a1e7560b0c12d9be189d6c2dd.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:3528
- 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:4088
- 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:856

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

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Downloads

VBS3.vbs

Path C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs
Size 753B
SHA256 262d0f80ed356242dbc19728b405c31ab3b9fa6862788d46eda6196d0e449a1d
MD5 b890eafed0bc528795747840303d90f2
SHA1 e95df6c524d249ea885c93256e01b73906f50f01
SHA512 a41bc1567bd5e12b7edecb00515f6db08f083826f7bfbc5ab1fb2195cb5a2a9514a27ce9fca2201b16768b772fa5d7b572e75232026e475bf97307d3c3bc19b2
TLSH
T17101CB10ED5C826C613543B22432E84FF3EE1543A3039CE8B889D0A62F707A89DB5A32
MD5 SHA1 SHA512 TLSH

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memory/3528-0-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/3528-19-0x0000000000400000-0x000000000055F000-memory.dmp

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