farfli | 58c5b1cdaba6c27143a4c64b01c865919543fc3d325cf1e33011c3a44eec0b3e

Analysis

max time kernel
149s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
09/08/2026, 06:40

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General

Target
2026-08-09_88f86a97918c295e3ca9d0b2c45f6065_coinminer_elex_wannacry.exe
Size 236KB
Sample260809-hfd5essejg
SHA256 58c5b1cdaba6c27143a4c64b01c865919543fc3d325cf1e33011c3a44eec0b3e
MD5 88f86a97918c295e3ca9d0b2c45f6065
SHA1 0510f993905a5ed10e0ed3049370f586d97cf5cf
SHA512 595d88f635ed22c9df754c187a842fec43d66d8b8a391f50f8b6dbb622d72756044f356e0fe86dc706d8e2aa697153f7a8e20003ac5ce76de6839e25804f965a
SSDEEP 6144:eMgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSoc:tgmYA/nsYf8QdsINkZ6CQetF
TLSH
T16334F18136A5CD77F0221B7D4D7B163A8537BE691B00B49BD3C4AD4FB431AE46E2E209
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

98.126.40.18:3204
http://98.126.40.19:805/index.php
http://98.126.40.20:803/

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 2 IoCs

resource	yara_rule
behavioral1/memory/3848-16-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli
behavioral1/memory/3848-18-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/3848-16-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3848-18-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/812-0-0x0000000000400000-0x0000000000468000-memory.dmp	UPX
behavioral1/memory/812-2-0x0000000000400000-0x0000000000468000-memory.dmp	UPX
behavioral1/files/0x0013000000024346-4.dat	UPX
behavioral1/memory/4024-13-0x0000000000400000-0x0000000000468000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
4024	ghcha.exe

Executes dropped EXE 2 IoCs

pid	Process
4024	ghcha.exe
3848	ydwf.exe

Loads dropped DLL 1 IoCs

pid	Process
3848	ydwf.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-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\it = "c:\\Program Files\\amulbj\\ydwf.exe \"c:\\Program Files\\amulbj\\ydwfs.dll\",Interface"	ydwf.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)	\??\e:	ydwf.exe
File opened (read-only)	\??\h:	ydwf.exe
File opened (read-only)	\??\j:	ydwf.exe
File opened (read-only)	\??\n:	ydwf.exe
File opened (read-only)	\??\o:	ydwf.exe
File opened (read-only)	\??\r:	ydwf.exe
File opened (read-only)	\??\a:	ydwf.exe
File opened (read-only)	\??\b:	ydwf.exe
File opened (read-only)	\??\g:	ydwf.exe
File opened (read-only)	\??\k:	ydwf.exe
File opened (read-only)	\??\u:	ydwf.exe
File opened (read-only)	\??\z:	ydwf.exe
File opened (read-only)	\??\p:	ydwf.exe
File opened (read-only)	\??\q:	ydwf.exe
File opened (read-only)	\??\i:	ydwf.exe
File opened (read-only)	\??\l:	ydwf.exe
File opened (read-only)	\??\m:	ydwf.exe
File opened (read-only)	\??\s:	ydwf.exe
File opened (read-only)	\??\t:	ydwf.exe
File opened (read-only)	\??\w:	ydwf.exe
File opened (read-only)	\??\v:	ydwf.exe
File opened (read-only)	\??\x:	ydwf.exe
File opened (read-only)	\??\y:	ydwf.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	ydwf.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\amulbj\ydwf.exe	ghcha.exe
File opened for modification	\??\c:\Program Files\amulbj	ghcha.exe
File created	\??\c:\Program Files\amulbj\ydwfs.dll	ghcha.exe
File created	\??\c:\Program Files\amulbj\ydwf.exe	ghcha.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
2932	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	ydwf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-09_88f86a97918c295e3ca9d0b2c45f6065_coinminer_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	ghcha.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
2932	cmd.exe
4360	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	ydwf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ydwf.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4360	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3848	ydwf.exe
3848	ydwf.exe
3848	ydwf.exe
3848	ydwf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3848	ydwf.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
812	2026-08-09_88f86a97918c295e3ca9d0b2c45f6065_coinminer_elex_wannacry.exe
4024	ghcha.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 812 wrote to memory of 2932	812	2026-08-09_88f86a97918c295e3ca9d0b2c45f6065_coinminer_elex_wannacry.exe	85
PID 2932 wrote to memory of 4360	2932	cmd.exe	87
PID 2932 wrote to memory of 4024	2932	cmd.exe	88
PID 4024 wrote to memory of 3848	4024	ghcha.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-08-09_88f86a97918c295e3ca9d0b2c45f6065_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_88f86a97918c295e3ca9d0b2c45f6065_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:812
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ghcha.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_88f86a97918c295e3ca9d0b2c45f6065_coinminer_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:2932
- - 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:4360
- - C:\Users\Admin\AppData\Local\Temp\ghcha.exe
    C:\Users\Admin\AppData\Local\Temp\\ghcha.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_88f86a97918c295e3ca9d0b2c45f6065_coinminer_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:4024
  - - \??\c:\Program Files\amulbj\ydwf.exe
      "c:\Program Files\amulbj\ydwf.exe" "c:\Program Files\amulbj\ydwfs.dll",Interface C:\Users\Admin\AppData\Local\Temp\ghcha.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:3848

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

ydwf.exe

Path C:\Program Files\amulbj\ydwf.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
TLSH
T127532AC2FA00C171D4A7563019778F1A5766AC13DB728ACB94B0B4A41EB3291AD3E5FF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ghcha.exe

Path C:\Users\Admin\AppData\Local\Temp\ghcha.exe
Size 237KB
SHA256 789260061f871f96308bbd8e55b38f5000cc84426f77e955359768bacd4e13d6
MD5 192942fb3c341672c2e71f60a2bf5749
SHA1 0fe726743b917261874574e697911521d9c232d8
SHA512 3f315f5d727e5e298113952bc15f1c4d3e78b3b29b25ea5ddc5ab04f64c8f6c349bffd173445aca3bd364a83d5c36dae62683a60ad930bae9c7b10476a61e8f2
SSDEEP 6144:eMgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSocO:tgmYA/nsYf8QdsINkZ6CQetFI
TLSH
T1FC34F18136A5CD77F0231B7D4D7B163A8536BE691B407097D3C4AE4FB431AE46E2E209
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ydwfs.dll

Path \??\c:\Program Files\amulbj\ydwfs.dll
Size 168KB
SHA256 4c87e32b425c155a9d88454c9d57fccca0082d7961ca2cf4b59483a98c29139d
MD5 bcb784fce2e10fb4aebb4017b821ea5d
SHA1 c20489dc6206b050d874e5eca9c7ef3d005a009d
SHA512 e90904a61c01b530aa51f37f0be42f2efb07cf4c0595965d1bd377d35d2385718bc82dd03ffef189f3a3897aea34b3464e8d1317979f628441c4e10031277f3c
SSDEEP 3072:S25S8qsPfVoCxEI5GRycgzQkf2+JKC8L1MwwYsg89R5gZMR:SJ8T1xE3ocg9f2nfLnwYsxf2Zw
TLSH
T17EF312D3EFB649E0C0361BB06C53C10FB8620C6498715B5643D9FEEA3DA668E493D3A1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/812-0-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/812-2-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/3848-14-0x0000000010000000-0x000000001006D000-memory.dmp

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memory/3848-16-0x0000000010000000-0x000000001006D000-memory.dmp

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memory/3848-18-0x0000000010000000-0x000000001006D000-memory.dmp

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memory/4024-13-0x0000000000400000-0x0000000000468000-memory.dmp

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