farfli | 9451272367220ea6a25c0110a36f59977d805917c780af75f854587ca0168a4e

Analysis

max time kernel
149s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
16/04/2026, 05:59

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General

Target
2026-04-16_054a73303f3be9d725eb8e8c5ec5b451_elex_wannacry.exe
Size 332KB
Sample260416-gp3cyabs6v
SHA256 9451272367220ea6a25c0110a36f59977d805917c780af75f854587ca0168a4e
MD5 054a73303f3be9d725eb8e8c5ec5b451
SHA1 81d61e7d99eb429214d9cc2d74e7c56e336ebc31
SHA512 41fb301687ae596abb94314ad0b86427c17be1e24b8ae79dbcf73b625bf20f9297bd506562644a7f2f3878a5002746fbae30a0bc5ff1441dbd49f80d8a1a5f4b
SSDEEP 6144:bhBq6X2tzs/l0HdEezbOGijPwZFvP+TTRLxpxUzdjK8s7:fq6X2tgd4VZBg8k8I
TLSH
T11B74D02231D1C8A9C4C42633CD6DB7F4D7F9CEA8893D9A7B779B3E08EA379444205265
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

107.163.56.251:6658
http://107.163.56.238:18530/
http://107.163.56.239:18963/main.php

Attributes

user_agent
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/5104-17-0x0000000010000000-0x0000000010089000-memory.dmp	family_farfli
behavioral2/memory/5104-20-0x0000000010000000-0x0000000010089000-memory.dmp	family_farfli
behavioral2/memory/5104-21-0x0000000010000000-0x0000000010089000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/5104-17-0x0000000010000000-0x0000000010089000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5104-20-0x0000000010000000-0x0000000010089000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5104-21-0x0000000010000000-0x0000000010089000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Detects executables packed with VMProtect. 5 IoCs

resource	yara_rule
behavioral2/memory/3828-0-0x0000000000400000-0x0000000000452000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/3828-1-0x0000000000400000-0x0000000000452000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/3828-3-0x0000000000400000-0x0000000000452000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/files/0x000c000000027002-5.dat	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/3040-12-0x0000000000400000-0x0000000000452000-memory.dmp	INDICATOR_EXE_Packed_VMProtect

Deletes itself 1 IoCs

pid	Process
3040	xitgfystk.exe

Executes dropped EXE 2 IoCs

pid	Process
3040	xitgfystk.exe
5104	vxnt.exe

Loads dropped DLL 1 IoCs

pid	Process
5104	vxnt.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-1-5-21-600123060-2148212387-2211176695-1000\Software\Microsoft\Windows\CurrentVersion\Run\ECO = "c:\\Program Files\\gktwg\\vxnt.exe \"c:\\Program Files\\gktwg\\vxntj.dll\",EnumClassObjects"	vxnt.exe

Enumerates connected drives 3 TTPs 2 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)	\??\a:	vxnt.exe
File opened (read-only)	\??\b:	vxnt.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	vxnt.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\gktwg	xitgfystk.exe
File created	\??\c:\Program Files\gktwg\vxntj.dll	xitgfystk.exe
File created	\??\c:\Program Files\gktwg\vxnt.exe	xitgfystk.exe
File opened for modification	\??\c:\Program Files\gktwg\vxnt.exe	xitgfystk.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3560	5104	WerFault.exe	83

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	xitgfystk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vxnt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-16_054a73303f3be9d725eb8e8c5ec5b451_elex_wannacry.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
4560	cmd.exe
5196	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5196	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5104	vxnt.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3828	2026-04-16_054a73303f3be9d725eb8e8c5ec5b451_elex_wannacry.exe
3040	xitgfystk.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3828 wrote to memory of 4560	3828	2026-04-16_054a73303f3be9d725eb8e8c5ec5b451_elex_wannacry.exe	79
PID 4560 wrote to memory of 5196	4560	cmd.exe	81
PID 4560 wrote to memory of 3040	4560	cmd.exe	82
PID 3040 wrote to memory of 5104	3040	xitgfystk.exe	83

C:\Users\Admin\AppData\Local\Temp\2026-04-16_054a73303f3be9d725eb8e8c5ec5b451_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_054a73303f3be9d725eb8e8c5ec5b451_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3828
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\xitgfystk.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-16_054a73303f3be9d725eb8e8c5ec5b451_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4560
- - 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:5196
- - C:\Users\Admin\AppData\Local\Temp\xitgfystk.exe
    C:\Users\Admin\AppData\Local\Temp\\xitgfystk.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-16_054a73303f3be9d725eb8e8c5ec5b451_elex_wannacry.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:3040
  - - \??\c:\Program Files\gktwg\vxnt.exe
      "c:\Program Files\gktwg\vxnt.exe" "c:\Program Files\gktwg\vxntj.dll",EnumClassObjects C:\Users\Admin\AppData\Local\Temp\xitgfystk.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
      Suspicious use of AdjustPrivilegeToken
      PID:5104
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 5104 -s 1584
        5⤵
        Program crash
        
        PID:3560

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5104 -ip 5104
1⤵
PID:3692

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

vxnt.exe

Path C:\Program Files\gktwg\vxnt.exe
Size 40KB
SHA256 8dcaeeebef9b9f3d41d295db145ffb3850f309d089c08125c7fa7034db5fd80e
MD5 22bb5bd901d8b25ac5b41edbb7d5053e
SHA1 8a935dd8d7e104fc553ff7e8b54a404f7b079334
SHA512 cc3fb68fd6791a08e4a7d1a8db8d07cfcc8c9b9dceec10b53f0cb7ee86473303a19be4f23e379f84c59e02d0568e7c066e21cd1300f6032dac4ba52f609f62e7
SSDEEP 768:C67uhQpPPp0nnqFk509FRdVcQX6N58hJYim1jLP3RRe:C67uhQpXp0nnqa5093jKNAmB3RR
TLSH
T10C134C02BE88C071DDA114B41A5DB337939DED604B1586D3593887EBAA2D3E39E343DE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

xitgfystk.exe

Path C:\Users\Admin\AppData\Local\Temp\xitgfystk.exe
Size 332KB
SHA256 00789b3b05993c758f284d10835343cc27cbf7074d24f8732a556b92505d6a2b
MD5 44405e93dfa22f60a554df957a7bf91a
SHA1 4fc4436260a813d69607c8459c818a735b5c802e
SHA512 39fbbd0ed956f4a624d8767c014db412cc185d79e9c7357070743515a24c82853cca301dc8605819efda680f93c35815323b941771dbed76fb6dc29e6de4ad5b
SSDEEP 6144:bhBq6X2tzs/l0HdEezbOGijPwZFvP+TTRLxpxUzdjK8sl:fq6X2tgd4VZBg8k84
TLSH
T14A74D02231D1C8A9C4C42633CD6DB7F4D7F9CEA8893D9A7B779B3E08EA379444205265
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

vxntj.dll

Path \??\c:\Program Files\gktwg\vxntj.dll
Size 197KB
SHA256 f57bcb5816138a87ee1a94fd77425535807d9bf8d7a5501e553cd7c3d6b72fb3
MD5 98679f951a6f88d8c6c532f7c5dd1610
SHA1 fd8187cf010886eb5fb6b75724d0bb7d2ddbaeb8
SHA512 29402323aa96976380c59294aae9d4d82f0a8994601f8e22b86dc6933db3bacfefd6d2b63c24f264a71306eb18d2afa9a6c8da96016557bc9080dbe4f88c98e5
SSDEEP 3072:ruc9Y8cZZ/jkk+2FsQAF3jY0gd2mINCTrhcObieOBdq3D143a5gUpP8:m8cZRi2FxAFc0VxNCTmONO+h4K5gi0
TLSH
T1271402C1DBF10372D45F0B314A320D3A7972D8D894888B6AD289D29F6C7BDA9235D36D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3040-12-0x0000000000400000-0x0000000000452000-memory.dmp

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memory/3828-0-0x0000000000400000-0x0000000000452000-memory.dmp

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memory/3828-1-0x0000000000400000-0x0000000000452000-memory.dmp

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memory/3828-3-0x0000000000400000-0x0000000000452000-memory.dmp

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memory/5104-16-0x0000000010000000-0x0000000010089000-memory.dmp

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memory/5104-17-0x0000000010000000-0x0000000010089000-memory.dmp

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memory/5104-20-0x0000000010000000-0x0000000010089000-memory.dmp

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memory/5104-21-0x0000000010000000-0x0000000010089000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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