farfli | 0a8caff1f4dcc8b414f8ffae07bc7d067b56c3e6b8f1e5bd611cd19082633cca

General

Target
2026-08-13_f4355b49c90b5faa383273253ebc54c5_elex_strictor_wannacry.exe
Size 128KB
Sample260813-1yspmszalg
SHA256 0a8caff1f4dcc8b414f8ffae07bc7d067b56c3e6b8f1e5bd611cd19082633cca
MD5 f4355b49c90b5faa383273253ebc54c5
SHA1 b4555268d6c2848c8e519eae51a7760d98de8f49
SHA512 eb32f8c702bd3b92cdf5910dad7e94a396a59702a1ac919449bda3f0a7bb03a6b612ba55a8f83883d186f1935cce2d999ad8e0c045871ab4f40619587b77c667
SSDEEP 1536:QaaczXhtqkUlX/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJnddI3GMbBan:la7qc9rqzMseNoVv9EJFdXMbBc
TLSH
T12DD3170263F6C184F1B21A30CA3646F04BA7BC6AF970926B17847E4EBD31A55ED21777
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 4 IoCs

resource	yara_rule
behavioral2/memory/3868-6-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/3868-7-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/3868-9-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/3868-8-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/3868-6-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3868-8-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 4 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
7	3868	rundll32.exe
9	3868	rundll32.exe
10	3868	rundll32.exe
11	3868	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5548	llwgt.exe

Executes dropped EXE 1 IoCs

pid	Process
5548	llwgt.exe

Loads dropped DLL 1 IoCs

pid	Process
3868	rundll32.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-1-5-21-2246396966-3025826688-3847171515-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\clswo\\yfikn.dll\",init"	rundll32.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:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.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	rundll32.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
6068	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	llwgt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-13_f4355b49c90b5faa383273253ebc54c5_elex_strictor_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
6068	cmd.exe
4144	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	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4144	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3868	rundll32.exe
3868	rundll32.exe
3868	rundll32.exe
3868	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3868	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1156	2026-08-13_f4355b49c90b5faa383273253ebc54c5_elex_strictor_wannacry.exe
5548	llwgt.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1156 wrote to memory of 6068	1156	2026-08-13_f4355b49c90b5faa383273253ebc54c5_elex_strictor_wannacry.exe	89
PID 6068 wrote to memory of 4144	6068	cmd.exe	91
PID 6068 wrote to memory of 5548	6068	cmd.exe	92
PID 5548 wrote to memory of 3868	5548	llwgt.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-13_f4355b49c90b5faa383273253ebc54c5_elex_strictor_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-13_f4355b49c90b5faa383273253ebc54c5_elex_strictor_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1156
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\llwgt.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-13_f4355b49c90b5faa383273253ebc54c5_elex_strictor_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:6068
- - 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:4144
- - \??\c:\llwgt.exe
    c:\llwgt.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-13_f4355b49c90b5faa383273253ebc54c5_elex_strictor_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5548
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\clswo\yfikn.dll",init c:\llwgt.exe
      4⤵
      Badlisted process makes network request
      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:3868

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

llwgt.exe

Path C:\llwgt.exe
Size 128KB
SHA256 422828f55be4e5e36ebd3bc02b6e719fa989d8cbbec6dd63275572b710bc047b
MD5 b752e6f8a069962dd5eb7cd9ac05453d
SHA1 62cbc9a0004b7241abd17e4293e10f8f160cc337
SHA512 ab0e44219a77d5f31c0379de0e260b59a2c37d50578e2bf08e57ad2c1e331400b1c81935a6e75a0a9087620e001b24cd695787249a62136d434dd690cd12a9e8
SSDEEP 1536:QaaczXhtqkUlX/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJnddI3GMbBaT:la7qc9rqzMseNoVv9EJFdXMbB2
TLSH
T133D3170263F6C184F1B21A30CA3646F04BA7BC6AF970926B17847E4EBD31A55ED21777
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

yfikn.dll

Path \??\c:\clswo\yfikn.dll
Size 50KB
SHA256 a632527bcd457c9a4cfce83e7a9a675baff790b0279de5d8ea3192dfb2dd888a
MD5 ab32c5bfd7ecfbe9ed733dfb81210933
SHA1 4d5c6e7a0031691f12e78b096ff928b0d55bdfab
SHA512 59b971146292074d76d23d5f26889108f4d6e33804332449f4c589bf8a8d53e37ac8dfea47e9d3c5ae0f382ae1acf25c4968bea87b3f5ff9d51f2274229c1ab5
SSDEEP 1536:mrrG57ZqLLpf+Xz+HOtygmRnO/x5Rq8Gm:mwKGqutWM/x281
TLSH
T12033F1F4EFB4E067ECBA5F743E6A6215DA727B10C63188EA518090135F335CACA18717
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3868-6-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/3868-7-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/3868-9-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/3868-8-0x0000000010000000-0x0000000010032000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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