farfli | 45e383eca3c5a8341a5641e197f4aa0c0daf0bd4574d7e787ee2b2b9204c442d

Analysis

max time kernel
148s
max time network
146s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
31/07/2026, 11:59

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General

Target
2026-07-31_48f0fb0396048a475afeb21d066f77ad_elex_wannacry.exe
Size 105KB
Sample260731-n526fascma
SHA256 45e383eca3c5a8341a5641e197f4aa0c0daf0bd4574d7e787ee2b2b9204c442d
MD5 48f0fb0396048a475afeb21d066f77ad
SHA1 6b4e1cda9379fa03238c8f1535ad5ceb3ff20ca6
SHA512 0ba238d6d103bf575da353cd2b90e4afff6cb9cd4974624c34d9a701c9c9e5b487fb1f32c22d2fab8367ab0ff5331786ddd32d2f50c09173d1e3517fdc3e847b
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX47dq:piAXaKDeKNnD36cb8tI7o
TLSH
T167B3AE42ABF087A1E06159B506735B629EB3FC6B2934822777D7B70EAC30F40EE25355
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/4900-9-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/4900-10-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral2/memory/4900-11-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/4900-12-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4900-9-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4900-11-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
7	4900	rundll32.exe
8	4900	rundll32.exe
9	4900	rundll32.exe
11	4900	rundll32.exe
12	4900	rundll32.exe
14	4900	rundll32.exe
15	4900	rundll32.exe
17	4900	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4932	wfnru.exe

Executes dropped EXE 1 IoCs

pid	Process
4932	wfnru.exe

Loads dropped DLL 1 IoCs

pid	Process
4900	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-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\jmhan\\qxoyl.dll\",GetWindowClass"	rundll32.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)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\r:	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
3292	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	2026-07-31_48f0fb0396048a475afeb21d066f77ad_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	wfnru.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
3292	cmd.exe
2968	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
2968	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4900	rundll32.exe
4900	rundll32.exe
4900	rundll32.exe
4900	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4900	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4280	2026-07-31_48f0fb0396048a475afeb21d066f77ad_elex_wannacry.exe
4932	wfnru.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4280 wrote to memory of 3292	4280	2026-07-31_48f0fb0396048a475afeb21d066f77ad_elex_wannacry.exe	89
PID 3292 wrote to memory of 2968	3292	cmd.exe	91
PID 3292 wrote to memory of 4932	3292	cmd.exe	92
PID 4932 wrote to memory of 4900	4932	wfnru.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-31_48f0fb0396048a475afeb21d066f77ad_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-31_48f0fb0396048a475afeb21d066f77ad_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4280
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\wfnru.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-31_48f0fb0396048a475afeb21d066f77ad_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:3292
- - 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:2968
- - \??\c:\wfnru.exe
    c:\wfnru.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-31_48f0fb0396048a475afeb21d066f77ad_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4932
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\jmhan\qxoyl.dll",GetWindowClass c:\wfnru.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:4900

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

qxoyl.dll

Path \??\c:\jmhan\qxoyl.dll
Size 46KB
SHA256 f57f9e54f4774c2b944fb070ae0c2a02cbb4b7686ab3207544c3ccaff0ff3dd9
MD5 a3fd41430ddcaa55fde840788925406a
SHA1 dbdd87f5c1bbf6a6f44c2e2c4744675d5e4e75c2
SHA512 23109572cfc9a282ea3ec84d93bfe02303d27f365ad2d9f47f6234f91da14c64f80133cc5e49746dfcb65d2454b7e7c13eff59ba4bbc18e09d2fb1c630ba59c9
SSDEEP 768:2sUfnvxs6iLlhpfFPtnQf7kifD/v7yb9Bh7Cb0VQJojZC/xjTk:2sJT1qf4W/vub9nnV1jZC/xE
TLSH
T19D2302C8A6F08EF3D2F90B7980E046DCDCFDB939877381150566008E7C71057FA446AA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

wfnru.exe

Path \??\c:\wfnru.exe
Size 106KB
SHA256 050e6572ea2e0ddc596f18b4db5a17087e1909dd1ef12328deaecbe337415e07
MD5 43f2a585a88265dbd5d09bc52d04734a
SHA1 0c399dc611c2ebd7f174fe6cdeda3edb90b45234
SHA512 0265a0c0b1c9bc571ba21d71552aac25a102b84f23de5cc32565901da146f6dc6ba885b64deaef665d8b9f9467276aaa6bbbaa215dc689c0b2bad1afa5222e19
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX47dqv:piAXaKDeKNnD36cb8tI7ov
TLSH
T155B39E42ABF0C761E06159B506735B629EB2FC6B2934822777D6B70FDC30F00EA25355
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4280-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4280-2-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4900-9-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4900-10-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4900-11-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4900-12-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4932-6-0x0000000000400000-0x000000000041A000-memory.dmp

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