flyagent | a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8

Analysis

max time kernel
101s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
24/04/2026, 23:13

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General

Target
a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe
Size 1.4MB
Sample260424-27f8msfs8p
SHA256 a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8
MD5 d0145b6a9c231fe0e0801c616cb32e50
SHA1 09aa233061267573eed10849ec7cca2f56ad2bb5
SHA512 14a4801b6baafb7a51ac3db17fad13a409cb2528f61912850d819675a38c64c9df362a5c657099e7b8ab85ef05b82e69b33a104409a5a74da5cce326c6903bac
SSDEEP 24576:GH0dl8myX9Bg42QoXFkrzkmplSgRDYo0lG4Z8r7Qfbkiu5QS:GcallSllG4ZM7QzMR
TLSH
T13D658D13F292C0F1E61C227124FB6339BE749B450A71CAC7EB95DD791C32691AB6720E
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor discovery 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/792-0-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/792-11-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent

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	a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3847269522-1618051987-1942096715-1000_Classes\Local Settings	a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
792	a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe
792	a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe
792	a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe
792	a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
792	a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
792	a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe
792	a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 792 wrote to memory of 4064	792	a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe	80
PID 792 wrote to memory of 3124	792	a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe	81

C:\Users\Admin\AppData\Local\Temp\a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.exe
"C:\Users\Admin\AppData\Local\Temp\a1d1a1f894514e52f653e39474a6e1f471b40e853a624eaa2813388038cb00b8.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:792
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4064
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3124

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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 670ac338ae8b9865aaaaa5da1e27b56b3e2f51135c7437b322d992b698da8ae0
MD5 af6c92669bf96ad3f75bc5285a96120d
SHA1 d47a03a9122cc3bcdbc7c0a4260f2b615b083ea5
SHA512 08dccbf3de5b5e0f9b7a3672634504dfd6d5ea8d1c7e420c0983c677240f51f2f06c0a05c26f42da8da746655c0fdfdfe790b887de04329dd9d59e05cb0de207
TLSH
T17A01C000ED5CC259503453763432E40AF3AA1957A3139CD8B88AD1A12FB07589DB5E36
MD5 SHA1 SHA512 TLSH

Submit Download

memory/792-0-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/792-11-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/792-12-0x00000000024C0000-0x0000000002524000-memory.dmp

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memory/3124-14-0x0000000001790000-0x00000000017F4000-memory.dmp

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memory/4064-13-0x00000000020D0000-0x0000000002134000-memory.dmp

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