farfli | 87cff480e48a1005fdbc693df17c61b6f430e206b9449fcf7e7c19e7775bcfb8

Analysis

max time kernel
149s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
31/08/2026, 16:19

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General

Target
87cff480e48a1005fdbc693df17c61b6f430e206b9449fcf7e7c19e7775bcfb8.exe
Size 198KB
Sample260831-tsm4msythz
SHA256 87cff480e48a1005fdbc693df17c61b6f430e206b9449fcf7e7c19e7775bcfb8
MD5 425cca9dc3e032c5a258b2b0d13e3ec7
SHA1 dac2c071d7a88a57185b9a91201633913daf9750
SHA512 4df15c29700d6c3f3d884e15065ca55375de0a3452850427151e56831c4ee6cc7322b3ed842032c03e37716a3944ef4f12e497ccd1c4a5a114eb930ecd6d7c17
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkT:X2vnSwjaOcADw9cUeCOf
TLSH
T1DE141200CFA466E8D498607A0AC37321EBF29ACDEB735BF152D6D13B9F51F162859890
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 3 IoCs

resource	yara_rule
behavioral1/memory/1308-20-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/1308-22-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/1308-25-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 IoCs

pid	Process
2080	xqpjl.exe

Executes dropped EXE 2 IoCs

pid	Process
2080	xqpjl.exe
1308	wfsmib.exe

Loads dropped DLL 1 IoCs

pid	Process
1308	wfsmib.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-1-5-21-1074038928-2032447174-945360078-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\btfeebl\\wfsmib.exe \"c:\\Program Files\\btfeebl\\wfsmib.dll\",Compliance"	wfsmib.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)	\??\q:	wfsmib.exe
File opened (read-only)	\??\z:	wfsmib.exe
File opened (read-only)	\??\h:	wfsmib.exe
File opened (read-only)	\??\i:	wfsmib.exe
File opened (read-only)	\??\k:	wfsmib.exe
File opened (read-only)	\??\n:	wfsmib.exe
File opened (read-only)	\??\r:	wfsmib.exe
File opened (read-only)	\??\u:	wfsmib.exe
File opened (read-only)	\??\x:	wfsmib.exe
File opened (read-only)	\??\y:	wfsmib.exe
File opened (read-only)	\??\b:	wfsmib.exe
File opened (read-only)	\??\j:	wfsmib.exe
File opened (read-only)	\??\o:	wfsmib.exe
File opened (read-only)	\??\t:	wfsmib.exe
File opened (read-only)	\??\a:	wfsmib.exe
File opened (read-only)	\??\e:	wfsmib.exe
File opened (read-only)	\??\l:	wfsmib.exe
File opened (read-only)	\??\s:	wfsmib.exe
File opened (read-only)	\??\v:	wfsmib.exe
File opened (read-only)	\??\w:	wfsmib.exe
File opened (read-only)	\??\g:	wfsmib.exe
File opened (read-only)	\??\m:	wfsmib.exe
File opened (read-only)	\??\p:	wfsmib.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	wfsmib.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\btfeebl	xqpjl.exe
File created	\??\c:\Program Files\btfeebl\wfsmib.dll	xqpjl.exe
File created	\??\c:\Program Files\btfeebl\wfsmib.exe	xqpjl.exe
File opened for modification	\??\c:\Program Files\btfeebl\wfsmib.exe	xqpjl.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
3456	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xqpjl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wfsmib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	87cff480e48a1005fdbc693df17c61b6f430e206b9449fcf7e7c19e7775bcfb8.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
3456	cmd.exe
3376	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	wfsmib.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	wfsmib.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3376	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1308	wfsmib.exe
1308	wfsmib.exe
1308	wfsmib.exe
1308	wfsmib.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1308	wfsmib.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3592	87cff480e48a1005fdbc693df17c61b6f430e206b9449fcf7e7c19e7775bcfb8.exe
2080	xqpjl.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3592 wrote to memory of 3456	3592	87cff480e48a1005fdbc693df17c61b6f430e206b9449fcf7e7c19e7775bcfb8.exe	85
PID 3456 wrote to memory of 3376	3456	cmd.exe	87
PID 3456 wrote to memory of 2080	3456	cmd.exe	88
PID 2080 wrote to memory of 1308	2080	xqpjl.exe	89

C:\Users\Admin\AppData\Local\Temp\87cff480e48a1005fdbc693df17c61b6f430e206b9449fcf7e7c19e7775bcfb8.exe
"C:\Users\Admin\AppData\Local\Temp\87cff480e48a1005fdbc693df17c61b6f430e206b9449fcf7e7c19e7775bcfb8.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3592
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\xqpjl.exe "C:\Users\Admin\AppData\Local\Temp\87cff480e48a1005fdbc693df17c61b6f430e206b9449fcf7e7c19e7775bcfb8.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:3456
- - 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:3376
- - C:\Users\Admin\AppData\Local\Temp\xqpjl.exe
    C:\Users\Admin\AppData\Local\Temp\\xqpjl.exe "C:\Users\Admin\AppData\Local\Temp\87cff480e48a1005fdbc693df17c61b6f430e206b9449fcf7e7c19e7775bcfb8.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:2080
  - - \??\c:\Program Files\btfeebl\wfsmib.exe
      "c:\Program Files\btfeebl\wfsmib.exe" "c:\Program Files\btfeebl\wfsmib.dll",Compliance C:\Users\Admin\AppData\Local\Temp\xqpjl.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:1308

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

xqpjl.exe

Path C:\Users\Admin\AppData\Local\Temp\xqpjl.exe
Size 198KB
SHA256 8d05931cb355fdddbcb5901976178b1d2cda00c72941697d6f27c8bf6eece6bd
MD5 f8dd35cc1d66b1afe64f861633426ec5
SHA1 43964ce6bdd996f57da6b52d1480895387871638
SHA512 b1ac9e8a7a2de8c78fc1d47fd3e88f23b6753ac6492c0b045e3126b9ab8ceed97581577b751de5889f7cc7484c0e9ca0513e60d518d93c09e1749b3324d5db2c
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkT:X2vnSwjaOcADw9cUeCOf
TLSH
T1EB141200CFA466E8D498607A0AC37321EBF29ACDEB735BF152D6D13B9F51F162819890
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

wfsmib.dll

Path \??\c:\Program Files\btfeebl\wfsmib.dll
Size 141KB
SHA256 3053737754e649c535af8742f6cd323d88b16708b9e790ea55709bdf50378853
MD5 3206c9ecc60590fe56c29adf9839ce82
SHA1 02fbb16657842aec7ac8f1cce35eb8cfb970eee0
SHA512 f14275a6b135e016ccf6eeef1b2893e07a27b00a0d4f2e69a3c34c2d3c2f362a345f8aa3ccc45b1d478663c6ce1d3dd5dc8310184be8b1a164a7b56c3d2dca08
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4lf:RGMmfToTJY6zpSyvkGSn1tlf
TLSH
T110E302E0E3B7C4B6C269573183937DF3161CF5346B18072EED62A32769394C84A9DA1A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

wfsmib.exe

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

Submit Download

memory/1308-25-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1308-22-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1308-20-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1308-19-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2080-9-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2080-18-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2080-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3592-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3592-4-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3592-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3592-2-0x0000000000400000-0x000000000044901D-memory.dmp

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