flyagent | 0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5

Analysis

max time kernel
51s
max time network
145s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
09/09/2026, 06:33

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General

Target
0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe
Size 1.1MB
Sample260909-ha8f3ssfnd
SHA256 0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5
MD5 b2197858d56739bce622be0186cb8617
SHA1 8ee6282d050687965843950af2281b210fc66925
SHA512 9efde56a553bdaf29e1deb0c84de688b577148ce374e4fbe1677e199587da1eb3659993e90e4b66231594bb84536184782b784386b2fd8569fc85c19ab886098
SSDEEP 24576:aH0dl8myX9Bg42QoXFkrzkmplSgRDYo0lG4Z8r7Qfbkiu5Qf:acallSllG4ZM7QzMC
TLSH
T141458D13F292C0F1E61C227124FB6739BE749B450A71CAC7EB94DD791C32691AB6720E
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/5392-0-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/5392-18-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/5392-21-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent

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

execution

Visual Basic

T1059.005

pid	Process
1784	WScript.exe
1920	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	0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2301830172-776172150-2531349243-1000_Classes\Local Settings	0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5392	0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe
5392	0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe
5392	0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe
5392	0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
5392	0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5392	0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe
5392	0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 5392 wrote to memory of 1784	5392	0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe	90
PID 5392 wrote to memory of 1920	5392	0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe	89

C:\Users\Admin\AppData\Local\Temp\0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.exe
"C:\Users\Admin\AppData\Local\Temp\0b91c8aec760cbb6e868f2f6bef49991af89fa520f65e4b9b95eedec5f5c28b5.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:5392
- 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:1920
- 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:1784

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 a1fb19d65bc3be9bce7028d5db30d54d87bd408dca34e8e81f38369f2d779e13
MD5 979885df8f8ff9745ca91d6abf793d88
SHA1 4bb50cb6ce258914b0ccbd0d22d6f5cf68bb1f3d
SHA512 07eef6733abbe062c8d3c0d2b84d13a372c2542427dc63fc19146e6f2c77804746461b9aeda172267ebcae31e31719a9a4c0d43145fa0654a2a4a056ebff9c22
TLSH
T16A01C000DD4CC26C603563752532E44EF7AA15536303ACE9B899D0612FB0B6C5CB0A37
MD5 SHA1 SHA512 TLSH

Submit Download

memory/5392-0-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/5392-18-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/5392-21-0x0000000000400000-0x000000000055F000-memory.dmp

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