farfli | 16daf287b90fddc4d12b097180b796aa6a1568dbe3e19f9f58656bacacbc55c0

Analysis

max time kernel
150s
max time network
136s
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, 08:22

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General

Target
16daf287b90fddc4d12b097180b796aa6a1568dbe3e19f9f58656bacacbc55c0.exe
Size 196KB
Sample260924-j9tyea1ekf
SHA256 16daf287b90fddc4d12b097180b796aa6a1568dbe3e19f9f58656bacacbc55c0
MD5 01c4aeb9b5e07f385c0ec9951f7bc9d2
SHA1 80f418b25c49885f503760fe34cbdf07358ef248
SHA512 7af240206363780d29cd3fc6c8629ff0547b74776597043d67893b9a4c51a8dd8c342c655747c720e32325d19c3517ba2f883b6ad3085ee0f0388c2ca3d943e4
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTv:X2vnSwjaOcADw9cUeCOfp
TLSH
T1C2141200DBA461E4D498707A0AC37321E7F29ACEEB735BF152D6D12BAF51F162459890
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 4 IoCs

resource	yara_rule
behavioral2/memory/4440-14-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/4440-15-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/4440-17-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/4440-20-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3716	tmumyw.exe

Executes dropped EXE 2 IoCs

pid	Process
3716	tmumyw.exe
4440	fzkv.exe

Loads dropped DLL 1 IoCs

pid	Process
4440	fzkv.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\\ggyfrlto\\fzkv.exe \"c:\\Program Files\\ggyfrlto\\fzkvo.dll\",Compliance"	fzkv.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)	\??\n:	fzkv.exe
File opened (read-only)	\??\o:	fzkv.exe
File opened (read-only)	\??\v:	fzkv.exe
File opened (read-only)	\??\g:	fzkv.exe
File opened (read-only)	\??\i:	fzkv.exe
File opened (read-only)	\??\p:	fzkv.exe
File opened (read-only)	\??\s:	fzkv.exe
File opened (read-only)	\??\y:	fzkv.exe
File opened (read-only)	\??\a:	fzkv.exe
File opened (read-only)	\??\k:	fzkv.exe
File opened (read-only)	\??\r:	fzkv.exe
File opened (read-only)	\??\w:	fzkv.exe
File opened (read-only)	\??\x:	fzkv.exe
File opened (read-only)	\??\z:	fzkv.exe
File opened (read-only)	\??\h:	fzkv.exe
File opened (read-only)	\??\q:	fzkv.exe
File opened (read-only)	\??\t:	fzkv.exe
File opened (read-only)	\??\u:	fzkv.exe
File opened (read-only)	\??\b:	fzkv.exe
File opened (read-only)	\??\d:	fzkv.exe
File opened (read-only)	\??\j:	fzkv.exe
File opened (read-only)	\??\l:	fzkv.exe
File opened (read-only)	\??\m:	fzkv.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	fzkv.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\ggyfrlto	tmumyw.exe
File created	\??\c:\Program Files\ggyfrlto\fzkvo.dll	tmumyw.exe
File created	\??\c:\Program Files\ggyfrlto\fzkv.exe	tmumyw.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
3368	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	16daf287b90fddc4d12b097180b796aa6a1568dbe3e19f9f58656bacacbc55c0.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	tmumyw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fzkv.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
3368	cmd.exe
5036	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	fzkv.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	fzkv.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5036	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4440	fzkv.exe
4440	fzkv.exe
4440	fzkv.exe
4440	fzkv.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4440	fzkv.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4460	16daf287b90fddc4d12b097180b796aa6a1568dbe3e19f9f58656bacacbc55c0.exe
3716	tmumyw.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4460 wrote to memory of 3368	4460	16daf287b90fddc4d12b097180b796aa6a1568dbe3e19f9f58656bacacbc55c0.exe	90
PID 3368 wrote to memory of 5036	3368	cmd.exe	92
PID 3368 wrote to memory of 3716	3368	cmd.exe	93
PID 3716 wrote to memory of 4440	3716	tmumyw.exe	94

C:\Users\Admin\AppData\Local\Temp\16daf287b90fddc4d12b097180b796aa6a1568dbe3e19f9f58656bacacbc55c0.exe
"C:\Users\Admin\AppData\Local\Temp\16daf287b90fddc4d12b097180b796aa6a1568dbe3e19f9f58656bacacbc55c0.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4460
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\tmumyw.exe "C:\Users\Admin\AppData\Local\Temp\16daf287b90fddc4d12b097180b796aa6a1568dbe3e19f9f58656bacacbc55c0.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:3368
- - 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:5036
- - C:\Users\Admin\AppData\Local\Temp\tmumyw.exe
    C:\Users\Admin\AppData\Local\Temp\\tmumyw.exe "C:\Users\Admin\AppData\Local\Temp\16daf287b90fddc4d12b097180b796aa6a1568dbe3e19f9f58656bacacbc55c0.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:3716
  - - \??\c:\Program Files\ggyfrlto\fzkv.exe
      "c:\Program Files\ggyfrlto\fzkv.exe" "c:\Program Files\ggyfrlto\fzkvo.dll",Compliance C:\Users\Admin\AppData\Local\Temp\tmumyw.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:4440

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

fzkv.exe

Path C:\Program Files\ggyfrlto\fzkv.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

tmumyw.exe

Path C:\Users\Admin\AppData\Local\Temp\tmumyw.exe
Size 196KB
SHA256 efa91bfd5293992617a5a7af461677724969bb48fea378c817c7009a8de5325b
MD5 a89c6391a22ad7c93ed9bc45d2ebf415
SHA1 64262c05269a9904466aa2803d59849d295ad95d
SHA512 10a1bd1f211c58829c555c67d0f96969c0276f87bd3560abd73d348f856c5241aa3948e52fcbd4a3ba9d12e1194d28d20cc12d8906335eb0c54e02d71096ac58
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTC:X2vnSwjaOcADw9cUeCOfQ
TLSH
T109141200DBA4A1E8D498707B0AC37321EBF29ACDFB735BF152D6D12BAF41F162459990
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fzkvo.dll

Path \??\c:\Program Files\ggyfrlto\fzkvo.dll
Size 141KB
SHA256 b4888ea78d7b387cd06d0b9abc94564db544f441c2d64e7c9c0fa7d54a057c9f
MD5 f2d933aebfb39cb3cb3286094ebcb61a
SHA1 5f6b887add20afb2801bfe824e9d937bfca2b80f
SHA512 162c1a8b0f0c818245aa59a74b7cad565ddd61a059cac856f2e08d1a893e71b5ab69ad6344010379bde0bc44081a203a901e2ce5141c82e012962e5df47fadc7
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4lE:RGMmfToTJY6zpSyvkGSn1tlE
TLSH
T120E312E0E3A7C4B6C2655B3187937DF3162CF4346B18072EFD62A32769394C44B9DA1A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3716-7-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3716-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3716-11-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4440-14-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/4440-15-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/4440-17-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/4440-20-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/4460-4-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4460-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4460-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4460-2-0x0000000000400000-0x000000000044901D-memory.dmp

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