farfli | 89e086c55c981cab40408cd92bd9ec224933265681daad143ae40daf2fe61669

Analysis

max time kernel
148s
max time network
138s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
24/09/2026, 07:51

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General

Target
89e086c55c981cab40408cd92bd9ec224933265681daad143ae40daf2fe61669.exe
Size 196KB
Sample260924-jp4bcahb53
SHA256 89e086c55c981cab40408cd92bd9ec224933265681daad143ae40daf2fe61669
MD5 03d4db3cb01630d6306835ed68906097
SHA1 844816efdcb4a99c57bcfc8487161601645ef248
SHA512 17d68a806c56ca6d807bfe8c8dbcd44e7e2ebd35a205323a3d973fcc5efffa40866ee2a3384edd14ed2e9e72e5fb7d9246021cc79d2f94fb0be9c0125d7135ef
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkT:X2vnSwjaOcADw9cUeCOf
TLSH
T1DB141200DBA461E8D498607B0AC3B321F7F29ACEEB735BF152D6D13B9F51F162859890
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion 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
behavioral2/memory/3504-17-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/3504-19-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/3504-22-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
2124	cuwyiclq.exe

Executes dropped EXE 2 IoCs

pid	Process
2124	cuwyiclq.exe
3504	ythz.exe

Loads dropped DLL 1 IoCs

pid	Process
3504	ythz.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-1-5-21-4057491610-3392471755-192832105-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\tzcozic\\ythz.exe \"c:\\Program Files\\tzcozic\\ythzp.dll\",Compliance"	ythz.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)	\??\r:	ythz.exe
File opened (read-only)	\??\s:	ythz.exe
File opened (read-only)	\??\t:	ythz.exe
File opened (read-only)	\??\b:	ythz.exe
File opened (read-only)	\??\i:	ythz.exe
File opened (read-only)	\??\m:	ythz.exe
File opened (read-only)	\??\u:	ythz.exe
File opened (read-only)	\??\v:	ythz.exe
File opened (read-only)	\??\w:	ythz.exe
File opened (read-only)	\??\z:	ythz.exe
File opened (read-only)	\??\d:	ythz.exe
File opened (read-only)	\??\h:	ythz.exe
File opened (read-only)	\??\l:	ythz.exe
File opened (read-only)	\??\p:	ythz.exe
File opened (read-only)	\??\j:	ythz.exe
File opened (read-only)	\??\k:	ythz.exe
File opened (read-only)	\??\x:	ythz.exe
File opened (read-only)	\??\y:	ythz.exe
File opened (read-only)	\??\a:	ythz.exe
File opened (read-only)	\??\g:	ythz.exe
File opened (read-only)	\??\n:	ythz.exe
File opened (read-only)	\??\o:	ythz.exe
File opened (read-only)	\??\q:	ythz.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	ythz.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\tzcozic	cuwyiclq.exe
File created	\??\c:\Program Files\tzcozic\ythzp.dll	cuwyiclq.exe
File created	\??\c:\Program Files\tzcozic\ythz.exe	cuwyiclq.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
3232	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	89e086c55c981cab40408cd92bd9ec224933265681daad143ae40daf2fe61669.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	cuwyiclq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ythz.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
3232	cmd.exe
4376	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	ythz.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ythz.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4376	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3504	ythz.exe
3504	ythz.exe
3504	ythz.exe
3504	ythz.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3504	ythz.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4112	89e086c55c981cab40408cd92bd9ec224933265681daad143ae40daf2fe61669.exe
2124	cuwyiclq.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4112 wrote to memory of 3232	4112	89e086c55c981cab40408cd92bd9ec224933265681daad143ae40daf2fe61669.exe	90
PID 3232 wrote to memory of 4376	3232	cmd.exe	92
PID 3232 wrote to memory of 2124	3232	cmd.exe	93
PID 2124 wrote to memory of 3504	2124	cuwyiclq.exe	94

C:\Users\Admin\AppData\Local\Temp\89e086c55c981cab40408cd92bd9ec224933265681daad143ae40daf2fe61669.exe
"C:\Users\Admin\AppData\Local\Temp\89e086c55c981cab40408cd92bd9ec224933265681daad143ae40daf2fe61669.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4112
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\cuwyiclq.exe "C:\Users\Admin\AppData\Local\Temp\89e086c55c981cab40408cd92bd9ec224933265681daad143ae40daf2fe61669.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:3232
- - 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:4376
- - C:\Users\Admin\AppData\Local\Temp\cuwyiclq.exe
    C:\Users\Admin\AppData\Local\Temp\\cuwyiclq.exe "C:\Users\Admin\AppData\Local\Temp\89e086c55c981cab40408cd92bd9ec224933265681daad143ae40daf2fe61669.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:2124
  - - \??\c:\Program Files\tzcozic\ythz.exe
      "c:\Program Files\tzcozic\ythz.exe" "c:\Program Files\tzcozic\ythzp.dll",Compliance C:\Users\Admin\AppData\Local\Temp\cuwyiclq.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:3504

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

Indicator Removal

T1070

File Deletion

T1070.004

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

ythz.exe

Path C:\Program Files\tzcozic\ythz.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

cuwyiclq.exe

Path C:\Users\Admin\AppData\Local\Temp\cuwyiclq.exe
Size 197KB
SHA256 fa4246b156ff9481c3af743fc00be2004ac84c6423bdfca61f5808d2e95fb94a
MD5 db4640a1187497af96c366bc23444854
SHA1 cd076607e8e5a36e4f084bde25f1f8078b278643
SHA512 29f07c1d3dc280e4f2ec9ffb8e9e833c669aae2dd4755e9926b07096059fd632b9b25c0afa60fa1fa13974128b5fd268c24a4e9cdabf8be51142408bdcd464d4
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkT:X2vnSwjaOcADw9cUeCOf
TLSH
T17D141200DBA461E8D498607B0AC3B321F7F29ACEEB735BF152D6D13B9F51F162859890
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ythzp.dll

Path \??\c:\Program Files\tzcozic\ythzp.dll
Size 141KB
SHA256 43c32ab001c72feeff7801ac5cfea2a3a651aac18f2eea4f53b82cb5d4936223
MD5 9a752e447ec05e704bc7958ec4ecc75c
SHA1 aa7be91834a8bc7c890b9e8640cd34d068919de1
SHA512 3877fc462c0136a72504669ff5b29259503fd63c66eb67ec81c2228dd322ba79a1ae4cbe7832897d390cd7edf593293e8233c018cd3824c77427ce0ed7dd22fe
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4la:RGMmfToTJY6zpSyvkGSn1tla
TLSH
T17DE302E0E3A7C4B6C265573183937DF3162CF5346B18072EED62A32769394C44B9DA1A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2124-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2124-9-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2124-13-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3504-16-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/3504-17-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/3504-19-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/3504-22-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/4112-5-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4112-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4112-2-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4112-1-0x0000000000400000-0x000000000044901D-memory.dmp

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