farfli | 331e5c843ca98fb3e0f9f0af94f1264d44faab4536544bb50a9dd234ff4602b5

Analysis

max time kernel
148s
max time network
156s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
18/08/2026, 23:26

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General

Target
2026-08-18_869250527f9402749c0245314185e853_elex_wannacry.exe
Size 365KB
Sample260818-3e18saca28
SHA256 331e5c843ca98fb3e0f9f0af94f1264d44faab4536544bb50a9dd234ff4602b5
MD5 869250527f9402749c0245314185e853
SHA1 3c59c4fa53f29cec3607d17517505718131d951e
SHA512 4274cbabdfb17cf3289ae03d504f7843916dbd5b9a8286000981d5dde17470890b894c81c134a9152cee27a98f9d651098a75fb28d298c175151e2d23dd6e8e0
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9m:FcirO2PE2QC00me2VCzYYT2U
TLSH
T11984DF1272D048F6E4853633CE76BE74E3F9D4AC5D32DB775F98460C1E26A0993222AD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

107.163.56.251:6658
http://107.163.56.240:18963/main.php
http://107.163.56.241:18530/

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/3644-10-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/3644-12-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/3644-17-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/3644-10-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3644-12-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3644-17-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 IoCs

pid	Process
4332	udutdunk.exe

Executes dropped EXE 2 IoCs

pid	Process
4332	udutdunk.exe
3644	cpgzlqld.exe

Loads dropped DLL 1 IoCs

pid	Process
3644	cpgzlqld.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-1-5-21-4046655672-1449839301-2197395821-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\tunun\\cpgzlqld.exe \"c:\\Program Files\\tunun\\cpgzlqld.dll\",Compliance"	cpgzlqld.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)	\??\j:	cpgzlqld.exe
File opened (read-only)	\??\l:	cpgzlqld.exe
File opened (read-only)	\??\s:	cpgzlqld.exe
File opened (read-only)	\??\x:	cpgzlqld.exe
File opened (read-only)	\??\v:	cpgzlqld.exe
File opened (read-only)	\??\w:	cpgzlqld.exe
File opened (read-only)	\??\d:	cpgzlqld.exe
File opened (read-only)	\??\n:	cpgzlqld.exe
File opened (read-only)	\??\q:	cpgzlqld.exe
File opened (read-only)	\??\r:	cpgzlqld.exe
File opened (read-only)	\??\y:	cpgzlqld.exe
File opened (read-only)	\??\z:	cpgzlqld.exe
File opened (read-only)	\??\a:	cpgzlqld.exe
File opened (read-only)	\??\b:	cpgzlqld.exe
File opened (read-only)	\??\k:	cpgzlqld.exe
File opened (read-only)	\??\m:	cpgzlqld.exe
File opened (read-only)	\??\o:	cpgzlqld.exe
File opened (read-only)	\??\p:	cpgzlqld.exe
File opened (read-only)	\??\t:	cpgzlqld.exe
File opened (read-only)	\??\u:	cpgzlqld.exe
File opened (read-only)	\??\g:	cpgzlqld.exe
File opened (read-only)	\??\h:	cpgzlqld.exe
File opened (read-only)	\??\i:	cpgzlqld.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	cpgzlqld.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\tunun\cpgzlqld.dll	udutdunk.exe
File created	\??\c:\Program Files\tunun\cpgzlqld.exe	udutdunk.exe
File opened for modification	\??\c:\Program Files\tunun	udutdunk.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
2200	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	cpgzlqld.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-18_869250527f9402749c0245314185e853_elex_wannacry.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	udutdunk.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
2200	cmd.exe
3316	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	cpgzlqld.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	cpgzlqld.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3316	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3644	cpgzlqld.exe
3644	cpgzlqld.exe
3644	cpgzlqld.exe
3644	cpgzlqld.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3644	cpgzlqld.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3336	2026-08-18_869250527f9402749c0245314185e853_elex_wannacry.exe
4332	udutdunk.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3336 wrote to memory of 2200	3336	2026-08-18_869250527f9402749c0245314185e853_elex_wannacry.exe	90
PID 2200 wrote to memory of 3316	2200	cmd.exe	92
PID 2200 wrote to memory of 4332	2200	cmd.exe	93
PID 4332 wrote to memory of 3644	4332	udutdunk.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-08-18_869250527f9402749c0245314185e853_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-18_869250527f9402749c0245314185e853_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3336
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\udutdunk.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-18_869250527f9402749c0245314185e853_elex_wannacry.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:2200
- - 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:3316
- - C:\Users\Admin\AppData\Local\Temp\udutdunk.exe
    C:\Users\Admin\AppData\Local\Temp\\udutdunk.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-18_869250527f9402749c0245314185e853_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:4332
  - - \??\c:\Program Files\tunun\cpgzlqld.exe
      "c:\Program Files\tunun\cpgzlqld.exe" "c:\Program Files\tunun\cpgzlqld.dll",Compliance C:\Users\Admin\AppData\Local\Temp\udutdunk.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:3644

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

Replay Monitor

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Downloads

cpgzlqld.exe

Path C:\Program Files\tunun\cpgzlqld.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

udutdunk.exe

Path C:\Users\Admin\AppData\Local\Temp\udutdunk.exe
Size 365KB
SHA256 8da6ef9154ab36265ab765cad5bf33292e33be0b07e623daf03adffb6ec899b0
MD5 105c456c9cd647ba00582bd96ba556d5
SHA1 d440422fcc039093791bf23016fd476052724d02
SHA512 55ca98e1b89cadb32ebc34201f0ffdb1e56bb0366205ab4469acbae84c298c43e8da80e79fdf51f29b61ebac2bd39ab3081f5eddda218804698dd9f16298f7e4
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9x:FcirO2PE2QC00me2VCzYYT2f
TLSH
T17E84DF1272D048F6E4853633CE76BE74E3F9D4AC5D32DB775F98460C1E26A0993222AD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

cpgzlqld.dll

Path \??\c:\Program Files\tunun\cpgzlqld.dll
Size 179KB
SHA256 2eb471e45bd476c629429dc86aa5b2d6cabe47e17be72fcacae56f1bd44fb093
MD5 07683bfc70b759078ca58e4d08f5489a
SHA1 941af5919ab9f35067f9df077b29b6ffa91d8d9b
SHA512 5acedd58b938935f5109a7c411b2d5691c0a54339fd7a465b6cec5f3d8d75bd16d585dfcfe7870c3931bd159320f3fb88b68a535ad01273b79fcabce802d5a2e
SSDEEP 3072:EC5Wpfs98nVCWdKycHtld8VBt7NUalwXH9RqYzJabTYd3KIdj6+uFdi98pvO0hfh:ECOfQ8nVcycHrd8VBtBUa4HfRzJabT86
TLSH
T1160423EABF42C652C84F677676AF244437AE05D91BC1E0A56F0482CE39C3135E67DE48
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3336-0-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/3336-2-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/3644-11-0x00000000024E0000-0x00000000024E1000-memory.dmp

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memory/3644-10-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/3644-12-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/3644-17-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/4332-8-0x0000000000400000-0x0000000000458000-memory.dmp

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