farfli | 947165775a37bd0496e376361698767361d3f8c5b8323b32635df1a206af81c7

Analysis

max time kernel
149s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
01/06/2026, 08:09

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General

Target
947165775a37bd0496e376361698767361d3f8c5b8323b32635df1a206af81c7.exe
Size 236KB
Sample260601-j2kprshs2q
SHA256 947165775a37bd0496e376361698767361d3f8c5b8323b32635df1a206af81c7
MD5 940a5551b6c7791585eb4fe5c9c27489
SHA1 3728f8ee90f4f8f4febbf2de96fede818a724a3b
SHA512 5268a9926f0bb81ad56ab4260a41cf6a026315b30d4dbf94c3e1f9a2004991c4b4cb921c878dce50df9b8ef0c339c0841beec69c761a5f626dec93311b11dad3
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTFKa:X2vnSwjaOcADw9cUeCOfb
TLSH
T1B3340200D7B2E5E8D44824BA0787D310EAE5DCDE7B736B7143D5E31FAB41F0AA4AA194
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

107.163.241.193:6520
http://107.163.241.181:16300/
http://107.163.241.182:12354/login.php

Attributes

user_agent
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C))

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli
Family: Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat

Detects Farfli Backdoor 2 IoCs

resource	yara_rule
behavioral2/memory/5116-20-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/5116-22-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 IoCs

pid	Process
484	udioirpg.exe

Executes dropped EXE 2 IoCs

pid	Process
484	udioirpg.exe
5116	gaa.exe

Loads dropped DLL 1 IoCs

pid	Process
5116	gaa.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1636999435-3883760687-346127294-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\bdeaj\\gaa.exe \"c:\\Program Files\\bdeaj\\gaaux.dll\",Compliance"	gaa.exe

Enumerates connected drives 3 TTPs 2 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\a:	gaa.exe
File opened (read-only)	\??\b:	gaa.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	gaa.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\bdeaj	udioirpg.exe
File created	\??\c:\Program Files\bdeaj\gaaux.dll	udioirpg.exe
File created	\??\c:\Program Files\bdeaj\gaa.exe	udioirpg.exe
File opened for modification	\??\c:\Program Files\bdeaj\gaa.exe	udioirpg.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2216	5116	WerFault.exe	84

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	947165775a37bd0496e376361698767361d3f8c5b8323b32635df1a206af81c7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	udioirpg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gaa.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5008	cmd.exe
3076	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3076	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5116	gaa.exe
5116	gaa.exe
5116	gaa.exe
5116	gaa.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5116	gaa.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2360	947165775a37bd0496e376361698767361d3f8c5b8323b32635df1a206af81c7.exe
484	udioirpg.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2360 wrote to memory of 5008	2360	947165775a37bd0496e376361698767361d3f8c5b8323b32635df1a206af81c7.exe	80
PID 5008 wrote to memory of 3076	5008	cmd.exe	82
PID 5008 wrote to memory of 484	5008	cmd.exe	83
PID 484 wrote to memory of 5116	484	udioirpg.exe	84

C:\Users\Admin\AppData\Local\Temp\947165775a37bd0496e376361698767361d3f8c5b8323b32635df1a206af81c7.exe
"C:\Users\Admin\AppData\Local\Temp\947165775a37bd0496e376361698767361d3f8c5b8323b32635df1a206af81c7.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\udioirpg.exe "C:\Users\Admin\AppData\Local\Temp\947165775a37bd0496e376361698767361d3f8c5b8323b32635df1a206af81c7.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5008
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3076
- - C:\Users\Admin\AppData\Local\Temp\udioirpg.exe
    C:\Users\Admin\AppData\Local\Temp\\udioirpg.exe "C:\Users\Admin\AppData\Local\Temp\947165775a37bd0496e376361698767361d3f8c5b8323b32635df1a206af81c7.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:484
  - - \??\c:\Program Files\bdeaj\gaa.exe
      "c:\Program Files\bdeaj\gaa.exe" "c:\Program Files\bdeaj\gaaux.dll",Compliance C:\Users\Admin\AppData\Local\Temp\udioirpg.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5116
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 5116 -s 1860
        5⤵
        Program crash
        
        PID:2216

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5116 -ip 5116
1⤵
PID:4492

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

gaa.exe

Path C:\Program Files\bdeaj\gaa.exe
Size 40KB
SHA256 8dcaeeebef9b9f3d41d295db145ffb3850f309d089c08125c7fa7034db5fd80e
MD5 22bb5bd901d8b25ac5b41edbb7d5053e
SHA1 8a935dd8d7e104fc553ff7e8b54a404f7b079334
SHA512 cc3fb68fd6791a08e4a7d1a8db8d07cfcc8c9b9dceec10b53f0cb7ee86473303a19be4f23e379f84c59e02d0568e7c066e21cd1300f6032dac4ba52f609f62e7
SSDEEP 768:C67uhQpPPp0nnqFk509FRdVcQX6N58hJYim1jLP3RRe:C67uhQpXp0nnqa5093jKNAmB3RR
TLSH
T10C134C02BE88C071DDA114B41A5DB337939DED604B1586D3593887EBAA2D3E39E343DE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

udioirpg.exe

Path C:\Users\Admin\AppData\Local\Temp\udioirpg.exe
Size 236KB
SHA256 277c5f3e1b79c819f6e46634427991eb3974f52a8a92f633f8a6f4028b7e4add
MD5 870f048b6f9ef7fbcb46b2f4fdccef42
SHA1 6272114daa78905272ea451519894102d43e4950
SHA512 d92a02ad60623bb20cc147eec1caf370dfb2f267354a52dcc905c68dd7eeb12911e7029e623557ad54de774de191aa6384b4f0a5f4414a5b681c08a78db7a074
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTFKb:X2vnSwjaOcADw9cUeCOf0
TLSH
T15A340200D7B2E5E8D44824BA0787D310EAE5DCDE7B736B7143D5E31FAB41F0AA4AA194
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

gaaux.dll

Path \??\c:\Program Files\bdeaj\gaaux.dll
Size 141KB
SHA256 47c59435f8a32e89e4abf80db20a7829e103b82928961a87e8a9e8f987a17ed0
MD5 1db06c02a5430ab7dba654941b50e302
SHA1 b803013434e6294a895bfa80c1ce22280c99fdfb
SHA512 75ccc82c8cfe01fb23eb411636dd0b6264c9230f807d17998f49eac479e45ba96d393e87b60fcb6172324d10088c15fa1a7b0744345a88d615a368c70708e1d1
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4lz:RGMmfToTJY6zpSyvkGSn1tlz
TLSH
T140E312E0F3A7C4B6C269573187937DF31618F4346B18072EFD62A32769394C84A9DA1A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/484-9-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/484-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/484-15-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2360-4-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2360-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2360-2-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2360-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/5116-19-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/5116-20-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/5116-22-0x0000000010000000-0x000000001004E000-memory.dmp

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