flyagent | 6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1

Resubmissions

16/08/2026, 16:16

260816-tq1lysssft

07/08/2026, 19:22

260807-x3d59shf97

27/07/2026, 21:53

260727-1rpdmsdd9610

Analysis

user interaction
yes
max time kernel
148s
max time network
182s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
27/07/2026, 21:53

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General

Target
Red-Flaged/6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe
Size 1.4MB
Sample260727-1rpdmsdd96
SHA256 6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1
MD5 b48419bb4a0fad2853243d744fc9dca5
SHA1 991802684cc29a9b0742d0521e2a8485d409eef2
SHA512 92be1c65d63a5164c6f91e1abf8069298ecaac84d4111d19bd91b35383e638ebc3066e666808fd961695d3a340bcabf4d1e40f65dd84f9b59a3785a9419fb1a0
SSDEEP 24576:faMoNmfTEs86C9r5m84DVTh22rFvGf9VLegQEollG4uXpeTR6h:f0NeEs86FvMLejlG4uYK
TLSH
T171659E27E9C180F2C198107168AB1F35FEB456912E358B83A7D4EEB85F72790DA3721D
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
behavioral20/memory/5932-16-0x0000000000400000-0x000000000056D000-memory.dmp	flyagent
behavioral20/memory/5932-19-0x0000000000400000-0x000000000056D000-memory.dmp	flyagent
behavioral20/files/0x0008000000019ce0-20.dat	flyagent

Deletes itself 1 IoCs

pid	Process
5372	svchcst.exe

Executes dropped EXE 2 IoCs

pid	Process
4212	svchcst.exe
5372	svchcst.exe

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

execution

Visual Basic

T1059.005

pid	Process
5404	WScript.exe
1892	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 5 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	6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe
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	svchcst.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchcst.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-552508041-2681165170-3229858294-1000_Classes\Local Settings	6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5932	6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe
5932	6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe
5932	6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe
5932	6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
5932	6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
5932	6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe
5932	6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe
4212	svchcst.exe
4212	svchcst.exe
5372	svchcst.exe
5372	svchcst.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5932 wrote to memory of 1892	5932	6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe	88
PID 5932 wrote to memory of 5404	5932	6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe	89
PID 5404 wrote to memory of 4212	5404	WScript.exe	93
PID 1892 wrote to memory of 5372	1892	WScript.exe	92

C:\Users\Admin\AppData\Local\Temp\Red-Flaged\6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.exe
"C:\Users\Admin\AppData\Local\Temp\Red-Flaged\6377d2686feb3c4b20e53085a379e9d2381adeaafc698f56373c1548a74a6fa1.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:5932
- 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
  - Suspicious use of WriteProcessMemory
  PID:1892
- - C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:5372
- 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
  - Suspicious use of WriteProcessMemory
  PID:5404
- - C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4212

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 2b734af22da477a22228948149304bb9b2594d4666138a5d3be4229308d09302
MD5 67adcfb5753ef1c982b4db75f4371a13
SHA1 3d4d58eb5b88f6647c0ae3a7d9f60ef40a85b996
SHA512 d2ddf3f22b7574cff37fe6889ca9370d21bd018c8605d70dc4a7e00af2997bfb61f20c1741f23874653774d1ea1aeef8619e959adbce6292d6ee979650671c7e
TLSH
T17401FE00DD4C825C603453B62432E84EF7EA1543A3039CD8B85ED4B62FB07689CB0E33
MD5 SHA1 SHA512 TLSH

Submit Download

svchcst.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe
Size 1.4MB
SHA256 1a5e5a38073180f77f284c4ba2851208e4c3cca7375ecf627ff272dafac03e31
MD5 01e248297e6963120ef25af3fc259db5
SHA1 c7acac6a769087611ad244f3f90d268314285e36
SHA512 f63db6162e9ef9eee1247f6faacb7eb13b30212eea09d968a4a1409df0a01856236ae683dbb9b47751918ba4e7f1335a879c3ef564b8670e7715c021b3e9fa41
SSDEEP 24576:faMoNmfTEs86C9r5m84DVTh22rFvGf9VLegQEollG4uXpeTR6D:f0NeEs86FvMLejlG4uYM
TLSH
T1E1659E27E9C180F2C198107168AB1F35FEB456912E358B83A7D4EEB85F72790DA3721D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/5932-16-0x0000000000400000-0x000000000056D000-memory.dmp

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memory/5932-19-0x0000000000400000-0x000000000056D000-memory.dmp

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