flyagent | 99c9d68b84af761db80aed4ebeafd16d35e7f4d14adf3ee40eca3732dfeda08b

Analysis

max time kernel
149s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
28/04/2026, 15:25

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General

Target
99c9d68b84af761db80aed4ebeafd16d35e7f4d14adf3ee40eca3732dfeda08b.exe
Size 1.4MB
Sample260428-str9bae15r
SHA256 99c9d68b84af761db80aed4ebeafd16d35e7f4d14adf3ee40eca3732dfeda08b
MD5 5a798c3a1680d7de7b18cbd6d6c10d10
SHA1 5dbd3b0247042fbb5d93670175bf4c85cb86212b
SHA512 13a8ce4d518e65c200bedc8d179352e9cdff5e523bf2dbf1965b24bbf7d3034cb4b19b1784cfa51596c17400f459c5344d12c6526b725a9a0bdaa15e3962d4c5
SSDEEP 24576:GH0dl8myX9Bg42QoXFkrzkmplSgRDYo0lG4Z8r7Q3kiu5r:GcallSllG4ZM7Q3M
TLSH
T111658C13F292C0F1E61C227124FB6339BE749B450A71CAC7EB95DD791C32691AB6720E
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/2084-0-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent
behavioral2/memory/2084-1-0x0000000000400000-0x000000000055F000-memory.dmp	flyagent

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2248	2084	WerFault.exe	79

System Location Discovery: System Language Discovery 1 TTPs 1 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	99c9d68b84af761db80aed4ebeafd16d35e7f4d14adf3ee40eca3732dfeda08b.exe

C:\Users\Admin\AppData\Local\Temp\99c9d68b84af761db80aed4ebeafd16d35e7f4d14adf3ee40eca3732dfeda08b.exe
"C:\Users\Admin\AppData\Local\Temp\99c9d68b84af761db80aed4ebeafd16d35e7f4d14adf3ee40eca3732dfeda08b.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2084
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2084 -s 592
  2⤵
  - Program crash
  PID:2248

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2084 -ip 2084
1⤵
PID:428

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2084-0-0x0000000000400000-0x000000000055F000-memory.dmp

Download

memory/2084-1-0x0000000000400000-0x000000000055F000-memory.dmp