farfli | ff5f1d4a635c365a5020e7b732e273976b73f4e160489a1f4fdf02a813ab7e90

Analysis

max time kernel
148s
max time network
137s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
25/08/2026, 09:06

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General

Target
ff5f1d4a635c365a5020e7b732e273976b73f4e160489a1f4fdf02a813ab7e90.exe
Size 231KB
Sample260825-k225gswtaw
SHA256 ff5f1d4a635c365a5020e7b732e273976b73f4e160489a1f4fdf02a813ab7e90
MD5 07d02e971f34f9bc417bfd81ad1b27a0
SHA1 b2e515b1841d5b406a1ec85361f7c384f7743f94
SHA512 51cfba9b0fd35f27e8752d2b1ca8c2173368d5f49785fcb19bece7faeb2c5b5958feba8eafbba0fb619e5d389134bb342d417a5a3c9036288a8c3417b8ca073f
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTFN:X2vnSwjaOcADw9cUeCOfN
TLSH
T1D2340200DBB2F5E8D44824BA0787D310E7E1DC9E7B73677143D5E22FAB41F1AA4AA194
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
behavioral2/memory/3680-17-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/3680-19-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/3680-22-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 IoCs

pid	Process
4084	pgrrab.exe

Executes dropped EXE 2 IoCs

pid	Process
4084	pgrrab.exe
3680	fwqyjzg.exe

Loads dropped DLL 1 IoCs

pid	Process
3680	fwqyjzg.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-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\wckjd\\fwqyjzg.exe \"c:\\Program Files\\wckjd\\fwqyjzg.dll\",Compliance"	fwqyjzg.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)	\??\y:	fwqyjzg.exe
File opened (read-only)	\??\d:	fwqyjzg.exe
File opened (read-only)	\??\q:	fwqyjzg.exe
File opened (read-only)	\??\w:	fwqyjzg.exe
File opened (read-only)	\??\g:	fwqyjzg.exe
File opened (read-only)	\??\i:	fwqyjzg.exe
File opened (read-only)	\??\p:	fwqyjzg.exe
File opened (read-only)	\??\t:	fwqyjzg.exe
File opened (read-only)	\??\z:	fwqyjzg.exe
File opened (read-only)	\??\h:	fwqyjzg.exe
File opened (read-only)	\??\m:	fwqyjzg.exe
File opened (read-only)	\??\n:	fwqyjzg.exe
File opened (read-only)	\??\o:	fwqyjzg.exe
File opened (read-only)	\??\s:	fwqyjzg.exe
File opened (read-only)	\??\u:	fwqyjzg.exe
File opened (read-only)	\??\x:	fwqyjzg.exe
File opened (read-only)	\??\a:	fwqyjzg.exe
File opened (read-only)	\??\b:	fwqyjzg.exe
File opened (read-only)	\??\j:	fwqyjzg.exe
File opened (read-only)	\??\k:	fwqyjzg.exe
File opened (read-only)	\??\l:	fwqyjzg.exe
File opened (read-only)	\??\r:	fwqyjzg.exe
File opened (read-only)	\??\v:	fwqyjzg.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	fwqyjzg.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\wckjd	pgrrab.exe
File created	\??\c:\Program Files\wckjd\fwqyjzg.dll	pgrrab.exe
File created	\??\c:\Program Files\wckjd\fwqyjzg.exe	pgrrab.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
4852	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	pgrrab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fwqyjzg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ff5f1d4a635c365a5020e7b732e273976b73f4e160489a1f4fdf02a813ab7e90.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
3420	PING.EXE
4852	cmd.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	fwqyjzg.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	fwqyjzg.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3420	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3680	fwqyjzg.exe
3680	fwqyjzg.exe
3680	fwqyjzg.exe
3680	fwqyjzg.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3680	fwqyjzg.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2968	ff5f1d4a635c365a5020e7b732e273976b73f4e160489a1f4fdf02a813ab7e90.exe
4084	pgrrab.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 4852	2968	ff5f1d4a635c365a5020e7b732e273976b73f4e160489a1f4fdf02a813ab7e90.exe	89
PID 4852 wrote to memory of 3420	4852	cmd.exe	91
PID 4852 wrote to memory of 4084	4852	cmd.exe	92
PID 4084 wrote to memory of 3680	4084	pgrrab.exe	93

C:\Users\Admin\AppData\Local\Temp\ff5f1d4a635c365a5020e7b732e273976b73f4e160489a1f4fdf02a813ab7e90.exe
"C:\Users\Admin\AppData\Local\Temp\ff5f1d4a635c365a5020e7b732e273976b73f4e160489a1f4fdf02a813ab7e90.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2968
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\pgrrab.exe "C:\Users\Admin\AppData\Local\Temp\ff5f1d4a635c365a5020e7b732e273976b73f4e160489a1f4fdf02a813ab7e90.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:4852
- - 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:3420
- - C:\Users\Admin\AppData\Local\Temp\pgrrab.exe
    C:\Users\Admin\AppData\Local\Temp\\pgrrab.exe "C:\Users\Admin\AppData\Local\Temp\ff5f1d4a635c365a5020e7b732e273976b73f4e160489a1f4fdf02a813ab7e90.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:4084
  - - \??\c:\Program Files\wckjd\fwqyjzg.exe
      "c:\Program Files\wckjd\fwqyjzg.exe" "c:\Program Files\wckjd\fwqyjzg.dll",Compliance C:\Users\Admin\AppData\Local\Temp\pgrrab.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:3680

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

fwqyjzg.exe

Path C:\Program Files\wckjd\fwqyjzg.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

pgrrab.exe

Path C:\Users\Admin\AppData\Local\Temp\pgrrab.exe
Size 231KB
SHA256 871012266c41256640472aa49cf78e67c2ab38b6eb730c6b5f18a2fee2059421
MD5 fd4e2acddbcfec01c4ba615213e67523
SHA1 5d395748a7fbe4ffa5f3446dd65c8f7155adcd4f
SHA512 b3c9b8de9b5bda64e304ce8ae39bb8ce6edc5b4af852cea2f6c32a191710bd0bb1be8b9e0d45519f8a37c554057790a8e693678043572e88e1f0730ce3a5d628
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTF:X2vnSwjaOcADw9cUeCOf
TLSH
T15D340200DBB2F5E8D44824BA0787D310E7E1DC9E7B73677143D5E22FAB41F1AA4AA194
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fwqyjzg.dll

Path \??\c:\Program Files\wckjd\fwqyjzg.dll
Size 141KB
SHA256 33278db76024d9e41551ba13b2a759636c9f3f069dbc98b39c2311d2274b4cf5
MD5 311223da47428d28af478882b06fb921
SHA1 e5f8c4fff3a600af6dcb7196510db954b7f92386
SHA512 e91f541c7f6bfaca8e2e4f3b69a4b0214b5904efadd857081bd2d6392653a1c8e018244a401a8b144cc7f646cf85eb80e634b8671a471f861bade92fbc3b6bb1
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4la:RGMmfToTJY6zpSyvkGSn1tla
TLSH
T105E302E0E3A7C4B6C269573183937DF3161CF5346B18072EED62A32769394C84B9DB1A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2968-5-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2968-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2968-2-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2968-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3680-16-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/3680-17-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/3680-19-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/3680-22-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/4084-9-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4084-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4084-13-0x0000000000400000-0x000000000044901D-memory.dmp

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