farfli | 786d3a96a6a893ff18c8b0be48379c5d2989cedc45494b9ef2e3c750d07ab781

Analysis

max time kernel
149s
max time network
153s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
31/05/2026, 03:33

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-05-31_8857a1ad1e113bda474e51706fbad952_elex_wannacry.exe
Size 337KB
Sample260531-d4e96sbs3j
SHA256 786d3a96a6a893ff18c8b0be48379c5d2989cedc45494b9ef2e3c750d07ab781
MD5 8857a1ad1e113bda474e51706fbad952
SHA1 9160e658414cb909d77d251269a6650cef37235b
SHA512 e3fca612d2480c1d79eaf6169ffefb3b7934ad97e715569b6e79d3fbbeca506debccee0efac8813f826f18447484ba21cc3ed9ed496290e0e34027c50747e0d1
SSDEEP 6144:bhBq6X2tzs/l0HdEezbOGijPwZFvP+TTRLxpxUzdjK8sMU:fq6X2tgd4VZBg8k8A
TLSH
T10574D06231D1C8A9C4C42633CD6DB7F4D7E9CEA88D3D8A7B779B3E08EA379444205265
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/5488-17-0x0000000010000000-0x0000000010089000-memory.dmp	family_farfli
behavioral2/memory/5488-16-0x0000000010000000-0x0000000010089000-memory.dmp	family_farfli
behavioral2/memory/5488-20-0x0000000010000000-0x0000000010089000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/5488-17-0x0000000010000000-0x0000000010089000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5488-16-0x0000000010000000-0x0000000010089000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5488-20-0x0000000010000000-0x0000000010089000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

Detects executables packed with VMProtect. 5 IoCs

resource	yara_rule
behavioral2/memory/1948-0-0x0000000000400000-0x0000000000452000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/1948-1-0x0000000000400000-0x0000000000452000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/1948-3-0x0000000000400000-0x0000000000452000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/files/0x0007000000025f55-5.dat	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/3308-12-0x0000000000400000-0x0000000000452000-memory.dmp	INDICATOR_EXE_Packed_VMProtect

Deletes itself 1 IoCs

pid	Process
3308	yupqi.exe

Executes dropped EXE 2 IoCs

pid	Process
3308	yupqi.exe
5488	ooalgk.exe

Loads dropped DLL 1 IoCs

pid	Process
5488	ooalgk.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-1-5-21-226940941-599731907-2645636698-1000\Software\Microsoft\Windows\CurrentVersion\Run\ECO = "c:\\Program Files\\jgbava\\ooalgk.exe \"c:\\Program Files\\jgbava\\ooalgk.dll\",EnumClassObjects"	ooalgk.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:	ooalgk.exe
File opened (read-only)	\??\b:	ooalgk.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	ooalgk.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\jgbava	yupqi.exe
File created	\??\c:\Program Files\jgbava\ooalgk.dll	yupqi.exe
File created	\??\c:\Program Files\jgbava\ooalgk.exe	yupqi.exe
File opened for modification	\??\c:\Program Files\jgbava\ooalgk.exe	yupqi.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5784	5488	WerFault.exe	84

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	yupqi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ooalgk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-31_8857a1ad1e113bda474e51706fbad952_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
3352	cmd.exe
4608	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	ooalgk.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ooalgk.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4608	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5488	ooalgk.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1948	2026-05-31_8857a1ad1e113bda474e51706fbad952_elex_wannacry.exe
3308	yupqi.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1948 wrote to memory of 3352	1948	2026-05-31_8857a1ad1e113bda474e51706fbad952_elex_wannacry.exe	80
PID 3352 wrote to memory of 4608	3352	cmd.exe	82
PID 3352 wrote to memory of 3308	3352	cmd.exe	83
PID 3308 wrote to memory of 5488	3308	yupqi.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-05-31_8857a1ad1e113bda474e51706fbad952_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-31_8857a1ad1e113bda474e51706fbad952_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1948
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\yupqi.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-31_8857a1ad1e113bda474e51706fbad952_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3352
- - 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:4608
- - C:\Users\Admin\AppData\Local\Temp\yupqi.exe
    C:\Users\Admin\AppData\Local\Temp\\yupqi.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-31_8857a1ad1e113bda474e51706fbad952_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:3308
  - - \??\c:\Program Files\jgbava\ooalgk.exe
      "c:\Program Files\jgbava\ooalgk.exe" "c:\Program Files\jgbava\ooalgk.dll",EnumClassObjects C:\Users\Admin\AppData\Local\Temp\yupqi.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 use of AdjustPrivilegeToken
      PID:5488
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 5488 -s 1308
        5⤵
        Program crash
        
        PID:5784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5488 -ip 5488
1⤵
PID:1008

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

Replay Monitor

Loading Replay Monitor...

Downloads

ooalgk.dll

Path C:\Program Files\jgbava\ooalgk.dll
Size 197KB
SHA256 f144b9b72a4efa7eea5de670272f3b58ebca63e7c31bb4e34f4c815e66151774
MD5 6d649eb6f6aa57454fc90f24f551f3f8
SHA1 43ef4cd4b2ab56602764118107afd54e44b2fae7
SHA512 5a8a714b6372853670ab67f3ad3bc1a8135d5373861b722791ddb046cd2da719aba0114d51f1a2f016d5a6156e15e3a8ef64945558fa8bf19d2c969cff296111
SSDEEP 3072:ruc9Y8cZZ/jkk+2FsQAF3jY0gd2mINCTrhcObieOBdq3D143a5gUpPu:m8cZRi2FxAFc0VxNCTmONO+h4K5giW
TLSH
T1AC1402C1DBF10372D45F0B314A320D3A7972D8D894888B6AD289D29F6C7BDE9235D369
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ooalgk.exe

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

Submit Download

yupqi.exe

Path C:\Users\Admin\AppData\Local\Temp\yupqi.exe
Size 337KB
SHA256 2050215911c440cf109de3f44a1e5d937f9049d502d8799972d360443e2f7809
MD5 c36fb69d64f5407f3835348c399879ae
SHA1 3262e322c05bd3a220403c4b9e61af204cb652da
SHA512 f9db5c1d3d22f52fc835eb8e1982cccd2c24b54ae77015dacc28dd7518b2d5d89741f505d9963009c09fcd3120cd1c15d3918059a6f56c9b16a4a1985db2833e
SSDEEP 6144:bhBq6X2tzs/l0HdEezbOGijPwZFvP+TTRLxpxUzdjK8sMD:fq6X2tgd4VZBg8k8X
TLSH
T1F274D06231D1C8A9C4C42633CD6DB7F4D7E9CEA88D3D8A7B779B3E08EA378444205265
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1948-0-0x0000000000400000-0x0000000000452000-memory.dmp

Download

memory/1948-1-0x0000000000400000-0x0000000000452000-memory.dmp

Download

memory/1948-3-0x0000000000400000-0x0000000000452000-memory.dmp

Download

memory/3308-12-0x0000000000400000-0x0000000000452000-memory.dmp

Download

memory/5488-17-0x0000000010000000-0x0000000010089000-memory.dmp

Download

memory/5488-16-0x0000000010000000-0x0000000010089000-memory.dmp

Download

memory/5488-20-0x0000000010000000-0x0000000010089000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads