flyagent | 7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982

Analysis

max time kernel
103s
max time network
117s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
23/04/2026, 11:15

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General

Target
7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe
Size 1.1MB
Sample260423-nc2dfaa16t
SHA256 7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982
MD5 413e671d3bdfce7fbc864b2c340b59fc
SHA1 a31e8b4c4bfa7bfe735a31cbe692f58734aa00a5
SHA512 b65246435d095584865648615f20e3c5451699098cfd01a09c113ca98e8edf2beaa8fbb516aadfea5683633bd67148ab9009623c9909f8cf028915c822f8c3d6
SSDEEP 24576:aH0dl8myX9Bg42QoXFkrzkmplSgRDYo0lG4Z8r7Qfbkiu5Q+:acallSllG4ZM7QzM7
TLSH
T1F5458D13F292C0F1E61C227124FB6739BE749B450A71CAC7EB94DD791C32691AB6720E
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 6 IoCs

resource	yara_rule
behavioral2/memory/576-0-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/576-11-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/576-19-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/576-38-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/files/0x001d00000002b1ed-39.dat	flyagent
behavioral2/memory/2404-54-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent

Deletes itself 1 IoCs

pid	Process
2404	svchcst.exe

Executes dropped EXE 1 IoCs

pid	Process
2404	svchcst.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 6 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	7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3847269522-1618051987-1942096715-1000_Classes\Local Settings	7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	WScript.exe
Key created	\REGISTRY\USER\S-1-5-21-3847269522-1618051987-1942096715-1000_Classes\Local Settings	svchcst.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
576	7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe
576	7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe
576	7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe
576	7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe
2404	svchcst.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
576	7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
576	7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe
576	7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe
2404	svchcst.exe
2404	svchcst.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 576 wrote to memory of 4888	576	7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe	80
PID 576 wrote to memory of 3236	576	7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe	81
PID 4888 wrote to memory of 2404	4888	WScript.exe	83
PID 2404 wrote to memory of 720	2404	svchcst.exe	84
PID 2404 wrote to memory of 3156	2404	svchcst.exe	85

C:\Users\Admin\AppData\Local\Temp\7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.exe
"C:\Users\Admin\AppData\Local\Temp\7e2a3efec83bae80988664fc019585ae3858959504b6035520faa8f2b7f41982.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:576
- 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
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:4888
- - 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
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2404
  - - C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"
      4⤵
      System Location Discovery: System Language Discovery
      PID:720
  - - C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs"
      4⤵
      System Location Discovery: System Language Discovery
      PID:3156
- 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:3236

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

Replay Monitor

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Downloads

Config.ini

Path C:\Users\Admin\AppData\Roaming\Microsoft\Config.ini
Size 92B
SHA256 44063c266686263f14cd2a83fee124fb3e61a9171a6aab69709464f49511011d
MD5 67b9b3e2ded7086f393ebbc36c5e7bca
SHA1 e6299d0450b9a92a18cc23b5704a2b475652c790
SHA512 826fbc9481f46b1ae3db828a665c55c349023caf563e6e8c17321f5f3af3e4c3914955db6f0eebfc6defe561315435d47310b4d0499ab9c2c85bb61264dedc09
MD5 SHA1 SHA512

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VBS3.vbs

Path C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs
Size 696B
SHA256 5e9eb3cc7e536ea1249b6bdb65b934565018fa760198e2b2c8f5537de84b86bd
MD5 0746413c017663c2889cbadf684741eb
SHA1 6a61f92238e17b83adba719b52d2f3d9cd205b8a
SHA512 e222a18584aadd15f5c4706601acc6fa30d6a08325f2679724eba4b2952e56d4d7e1a97c42ae88aefacfa59b87723118d2dd28c1541204715dc1e11b4867b05c
TLSH
T1AC019900DD4C8258503553B62432A44FF7AA1553A303ACE8B899D1B52F707689CB4A36
MD5 SHA1 SHA512 TLSH

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VBS3.vbs

Path C:\Users\Admin\AppData\Roaming\Microsoft\VBS3.vbs
Size 753B
SHA256 499849d305c9b88af262df986ee54cb0b009fc3e58dcf1c76054554a6fb74bea
MD5 75542c40826356242fe13f66681cb4c8
SHA1 df16f999f5bdef9574417886d5561a4177e268a1
SHA512 2d599f33d5bc241980421ef6e42c676bee9c0fa344e9d8e540b9b6b13bcc9327647d8d8bea0252cbdba72de28ae035081a1742272176c94ed8cafead8f7795ff
TLSH
T11D01CB01ED5C8229A13557767832A44EF3AA1953A303ACD9BC99D0A23F7076C8DB5F36
MD5 SHA1 SHA512 TLSH

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svchcst.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\svchcst.exe
Size 1.1MB
SHA256 97b41f680616f5379ec2931edc151884303ca75fb84961006519fbbd6e9dfbf8
MD5 e6acde6f7cbd20dabbdeb9fecabfadc6
SHA1 4695bf70ad7a685bc91e70694be8be31eb3b1209
SHA512 3b30cdfb48b0229c2521fe65dfd2f07f1618a8781db2da106265b1865056905823025fa2781eefc3a879319f711ffef1d6da68cdc401b8d05cf66bafe1ed3e35
SSDEEP 24576:aH0dl8myX9Bg42QoXFkrzkmplSgRDYo0lG4Z8r7Qfbkiu5Qz:acallSllG4ZM7QzMW
TLSH
T183458D13F292C0F1E61C227124FB6739BE749B450A71CAC7EB94DD791C32691AB6720E
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/576-11-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/576-12-0x0000000003630000-0x00000000036B2000-memory.dmp

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memory/576-0-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/576-19-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/576-38-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/576-37-0x0000000003630000-0x00000000036B2000-memory.dmp

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memory/720-55-0x0000000002B90000-0x0000000002C12000-memory.dmp

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memory/2404-53-0x0000000002550000-0x00000000025D2000-memory.dmp

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memory/2404-54-0x0000000000400000-0x000000000055F000-memory.dmp

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memory/3156-56-0x00000000030E0000-0x0000000003162000-memory.dmp

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memory/3236-14-0x0000000002E80000-0x0000000002F02000-memory.dmp

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memory/4888-13-0x00000000026B0000-0x0000000002732000-memory.dmp

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