farfli | da2995b1a63db42b81885660757b5d358d5653f558a98b803813d42977eb89e1

Analysis

max time kernel
150s
max time network
147s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
15/09/2026, 10:29

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General

Target
2026-09-14_651539db4f20470dce9bd20930d12a92_elex_wannacry.exe
Size 326KB
Sample260915-mja96atvbv
SHA256 da2995b1a63db42b81885660757b5d358d5653f558a98b803813d42977eb89e1
MD5 651539db4f20470dce9bd20930d12a92
SHA1 eae53a3ad65cee3f207c2a3401187e8c090b9bcf
SHA512 795738518ca31adc1224235343dac2e37c1e1018d3319c45b908a6a1f4a68d2d710a29bea07b364e245153b864bc91fc04a89b08f1d63b2d2714331e21e5a2be
SSDEEP 6144:bhBqzL2XTl/a0HdEezbOGijPwZFvP+TTRLxpxUzdjK:fqzL2XJC4VZBg8k
TLSH
T1D964CE2231C188A9C4C42633CD6EB7B4F7E9DEA84D7D9A7B77DB360DDA379048205264
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://107.163.56.238:18530/
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 2 IoCs

resource	yara_rule
behavioral2/memory/6092-11-0x0000000010000000-0x0000000010089000-memory.dmp	family_farfli
behavioral2/memory/6092-14-0x0000000010000000-0x0000000010089000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/6092-11-0x0000000010000000-0x0000000010089000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/6092-14-0x0000000010000000-0x0000000010089000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 IoCs

pid	Process
3912	wqztl.exe

Executes dropped EXE 2 IoCs

pid	Process
3912	wqztl.exe
6092	surr.exe

Loads dropped DLL 1 IoCs

pid	Process
6092	surr.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-1-5-21-2304238888-3968896904-642854331-1000\Software\Microsoft\Windows\CurrentVersion\Run\ECO = "c:\\Program Files\\wygyu\\surr.exe \"c:\\Program Files\\wygyu\\surrn.dll\",EnumClassObjects"	surr.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)	\??\k:	surr.exe
File opened (read-only)	\??\p:	surr.exe
File opened (read-only)	\??\r:	surr.exe
File opened (read-only)	\??\t:	surr.exe
File opened (read-only)	\??\x:	surr.exe
File opened (read-only)	\??\b:	surr.exe
File opened (read-only)	\??\l:	surr.exe
File opened (read-only)	\??\m:	surr.exe
File opened (read-only)	\??\a:	surr.exe
File opened (read-only)	\??\g:	surr.exe
File opened (read-only)	\??\h:	surr.exe
File opened (read-only)	\??\u:	surr.exe
File opened (read-only)	\??\v:	surr.exe
File opened (read-only)	\??\y:	surr.exe
File opened (read-only)	\??\z:	surr.exe
File opened (read-only)	\??\d:	surr.exe
File opened (read-only)	\??\n:	surr.exe
File opened (read-only)	\??\o:	surr.exe
File opened (read-only)	\??\q:	surr.exe
File opened (read-only)	\??\s:	surr.exe
File opened (read-only)	\??\w:	surr.exe
File opened (read-only)	\??\i:	surr.exe
File opened (read-only)	\??\j:	surr.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	surr.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\wygyu	wqztl.exe
File created	\??\c:\Program Files\wygyu\surrn.dll	wqztl.exe
File created	\??\c:\Program Files\wygyu\surr.exe	wqztl.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
3068	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wqztl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	surr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-09-14_651539db4f20470dce9bd20930d12a92_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
4580	PING.EXE
3068	cmd.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	surr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	surr.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4580	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
6092	surr.exe
6092	surr.exe
6092	surr.exe
6092	surr.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	6092	surr.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2200	2026-09-14_651539db4f20470dce9bd20930d12a92_elex_wannacry.exe
3912	wqztl.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 3068	2200	2026-09-14_651539db4f20470dce9bd20930d12a92_elex_wannacry.exe	88
PID 3068 wrote to memory of 4580	3068	cmd.exe	90
PID 3068 wrote to memory of 3912	3068	cmd.exe	91
PID 3912 wrote to memory of 6092	3912	wqztl.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-09-14_651539db4f20470dce9bd20930d12a92_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-14_651539db4f20470dce9bd20930d12a92_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\wqztl.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-14_651539db4f20470dce9bd20930d12a92_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:3068
- - 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:4580
- - C:\Users\Admin\AppData\Local\Temp\wqztl.exe
    C:\Users\Admin\AppData\Local\Temp\\wqztl.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-14_651539db4f20470dce9bd20930d12a92_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:3912
  - - \??\c:\Program Files\wygyu\surr.exe
      "c:\Program Files\wygyu\surr.exe" "c:\Program Files\wygyu\surrn.dll",EnumClassObjects C:\Users\Admin\AppData\Local\Temp\wqztl.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:6092

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

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Downloads

surr.exe

Path C:\Program Files\wygyu\surr.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

wqztl.exe

Path C:\Users\Admin\AppData\Local\Temp\wqztl.exe
Size 326KB
SHA256 352988a7805a33fe9df85182ced7c14fb07ade643b64dfccdab38c7d974a297d
MD5 95454690eddf4cc2d92b0e9b983eb64e
SHA1 8396a95059b69b4a44b397bbc98882e40a4d6725
SHA512 ffca1b8ec42340d6974b826b0a043ddbe576780f54c0ad597562114e0ec52723b460b5e9e58a8870fa08b4e8072f5106b0b88562a62e2a55ec188177e61d4a74
SSDEEP 6144:bhBqzL2XTl/a0HdEezbOGijPwZFvP+TTRLxpxUzdjKH:fqzL2XJC4VZBg8kH
TLSH
T11464CE2231C188A9C4C42633CD6EB7B4F7E9DEA84D7D9A7B77DB360DDA379048205264
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

surrn.dll

Path \??\c:\Program Files\wygyu\surrn.dll
Size 197KB
SHA256 4afe7bb20e6ff75b4b9f53d1140db06980b22e57582488ca020babcad1061b6b
MD5 220a8d9f465a2dd5c2bd5dfc4233a3df
SHA1 73d7287d349a63092065833707b01b3e38fa60e3
SHA512 4961b6d23a30b76f5c2f1c8418e68ad8d56202ecac94d80aa6550a17ac0c88f4379e4278f0da4e6cde9ccd73870457224fd158c8d535db01e19fc9c626625ad8
SSDEEP 3072:ruc9Y8cZZ/jkk+2FsQAF3jY0gd2mINCTrhcObieOBdq3D143a5gUpPS:m8cZRi2FxAFc0VxNCTmONO+h4K5giq
TLSH
T1B41402C1DBF10372D45F0B314A320D3A7972D8D894888B6AD289D29F6C7BDA9235D36D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2200-0-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/2200-2-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/3912-7-0x0000000000400000-0x0000000000467000-memory.dmp

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memory/6092-10-0x0000000010000000-0x0000000010089000-memory.dmp

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memory/6092-11-0x0000000010000000-0x0000000010089000-memory.dmp

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memory/6092-14-0x0000000010000000-0x0000000010089000-memory.dmp

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