farfli | 87aa4ffebbc5208dd1fa3cb8bc790bb9bda51cc21f43cd91781305ee4b2c2ceb

Analysis

max time kernel
149s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
09/08/2026, 09:17

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General

Target
87aa4ffebbc5208dd1fa3cb8bc790bb9bda51cc21f43cd91781305ee4b2c2ceb.exe
Size 201KB
Sample260809-k9eddsvcle
SHA256 87aa4ffebbc5208dd1fa3cb8bc790bb9bda51cc21f43cd91781305ee4b2c2ceb
MD5 02066b95b0b2a387d0cbacec3b93656f
SHA1 c5f208d8775d53eb2b8b17f67952bb5f8b8cfe4c
SHA512 e062fbf8a4ecdea9b9e9b671e7aae497206bbfe969b4ac520281926ad32f460bf31b9b14f881cb783ecadf78adf29821a0288b47dc22d131419d7327be97d2b8
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkT:X2vnSwjaOcADw9cUeCOf
TLSH
T15E141200DBB4A1E8D498607B0AC3A311F7F29ACEAB735BF152D6D22F9F41F162459890
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution 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 4 IoCs

resource	yara_rule
behavioral1/memory/1640-20-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/1640-21-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/1640-23-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/1640-26-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 IoCs

pid	Process
2332	uczeet.exe

Executes dropped EXE 2 IoCs

pid	Process
2332	uczeet.exe
1640	ysulrjir.exe

Loads dropped DLL 1 IoCs

pid	Process
1640	ysulrjir.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-1-5-21-1788976790-1541110888-1636651838-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\vxegzgsv\\ysulrjir.exe \"c:\\Program Files\\vxegzgsv\\ysulrjir.dll\",Compliance"	ysulrjir.exe

Enumerates connected drives 3 TTPs 23 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)	\??\g:	ysulrjir.exe
File opened (read-only)	\??\m:	ysulrjir.exe
File opened (read-only)	\??\s:	ysulrjir.exe
File opened (read-only)	\??\u:	ysulrjir.exe
File opened (read-only)	\??\w:	ysulrjir.exe
File opened (read-only)	\??\y:	ysulrjir.exe
File opened (read-only)	\??\a:	ysulrjir.exe
File opened (read-only)	\??\e:	ysulrjir.exe
File opened (read-only)	\??\l:	ysulrjir.exe
File opened (read-only)	\??\t:	ysulrjir.exe
File opened (read-only)	\??\z:	ysulrjir.exe
File opened (read-only)	\??\h:	ysulrjir.exe
File opened (read-only)	\??\n:	ysulrjir.exe
File opened (read-only)	\??\q:	ysulrjir.exe
File opened (read-only)	\??\r:	ysulrjir.exe
File opened (read-only)	\??\i:	ysulrjir.exe
File opened (read-only)	\??\j:	ysulrjir.exe
File opened (read-only)	\??\k:	ysulrjir.exe
File opened (read-only)	\??\o:	ysulrjir.exe
File opened (read-only)	\??\p:	ysulrjir.exe
File opened (read-only)	\??\v:	ysulrjir.exe
File opened (read-only)	\??\x:	ysulrjir.exe
File opened (read-only)	\??\b:	ysulrjir.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	ysulrjir.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\vxegzgsv	uczeet.exe
File created	\??\c:\Program Files\vxegzgsv\ysulrjir.dll	uczeet.exe
File created	\??\c:\Program Files\vxegzgsv\ysulrjir.exe	uczeet.exe
File opened for modification	\??\c:\Program Files\vxegzgsv\ysulrjir.exe	uczeet.exe

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4108	cmd.exe

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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uczeet.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ysulrjir.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	87aa4ffebbc5208dd1fa3cb8bc790bb9bda51cc21f43cd91781305ee4b2c2ceb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
4108	cmd.exe
1704	PING.EXE

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ysulrjir.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ysulrjir.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1704	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1640	ysulrjir.exe
1640	ysulrjir.exe
1640	ysulrjir.exe
1640	ysulrjir.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1640	ysulrjir.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1232	87aa4ffebbc5208dd1fa3cb8bc790bb9bda51cc21f43cd91781305ee4b2c2ceb.exe
2332	uczeet.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1232 wrote to memory of 4108	1232	87aa4ffebbc5208dd1fa3cb8bc790bb9bda51cc21f43cd91781305ee4b2c2ceb.exe	85
PID 4108 wrote to memory of 1704	4108	cmd.exe	87
PID 4108 wrote to memory of 2332	4108	cmd.exe	91
PID 2332 wrote to memory of 1640	2332	uczeet.exe	92

C:\Users\Admin\AppData\Local\Temp\87aa4ffebbc5208dd1fa3cb8bc790bb9bda51cc21f43cd91781305ee4b2c2ceb.exe
"C:\Users\Admin\AppData\Local\Temp\87aa4ffebbc5208dd1fa3cb8bc790bb9bda51cc21f43cd91781305ee4b2c2ceb.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1232
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\uczeet.exe "C:\Users\Admin\AppData\Local\Temp\87aa4ffebbc5208dd1fa3cb8bc790bb9bda51cc21f43cd91781305ee4b2c2ceb.exe"
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4108
- - 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:1704
- - C:\Users\Admin\AppData\Local\Temp\uczeet.exe
    C:\Users\Admin\AppData\Local\Temp\\uczeet.exe "C:\Users\Admin\AppData\Local\Temp\87aa4ffebbc5208dd1fa3cb8bc790bb9bda51cc21f43cd91781305ee4b2c2ceb.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:2332
  - - \??\c:\Program Files\vxegzgsv\ysulrjir.exe
      "c:\Program Files\vxegzgsv\ysulrjir.exe" "c:\Program Files\vxegzgsv\ysulrjir.dll",Compliance C:\Users\Admin\AppData\Local\Temp\uczeet.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
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1640

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

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

ysulrjir.exe

Path C:\Program Files\vxegzgsv\ysulrjir.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
TLSH
T127532AC2FA00C171D4A7563019778F1A5766AC13DB728ACB94B0B4A41EB3291AD3E5FF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

uczeet.exe

Path C:\Users\Admin\AppData\Local\Temp\uczeet.exe
Size 201KB
SHA256 5d9dd3b238cfd2af88b1a1573119ce709866dfda0d8ad735feb3d997757d8627
MD5 74ec1fc89e81bdbb402466fb3074ec99
SHA1 5ac714558994f60d8026b7195e442ac13199d412
SHA512 bef7c1e7eb7d4470fa2841a01860c28a7ef300e0fba021f391e4959a9d1237811860941eff058870dc4405362c7779d283d15df5e97a129f92d2273ea3db8325
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkT:X2vnSwjaOcADw9cUeCOf
TLSH
T146141200DBB4A1E8D498607B0AC3A311F7F29ACEAB735BF152D6D22F9F41F162459890
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ysulrjir.dll

Path \??\c:\Program Files\vxegzgsv\ysulrjir.dll
Size 141KB
SHA256 9db4b73c5519ae83ef8fed4109cd4c1afe2eade26667156909ec8ff31961e52a
MD5 e3258991339260acb2e6a5bffd263622
SHA1 714d9cc22d9ce596ccb863012b3d9dd483d62971
SHA512 60f2df0591d252f0d804370adb497c0af504b4076b779b5dce5c7417da5f94aa6439f6f9f7579ebf27c342671977fd1676b9c3ca8216f2da9f96829464854d98
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4lR:RGMmfToTJY6zpSyvkGSn1tlR
TLSH
T16BE312E0E3A7C4B6C269573183937DF3162CF5346B18072AFD62A32769394C44B9DA1A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1232-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/1232-2-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/1232-4-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/1232-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/1640-20-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1640-26-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1640-23-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1640-21-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2332-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2332-17-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2332-9-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2332-10-0x0000000000400000-0x000000000044901D-memory.dmp

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