farfli | 4dad808dd35f1a8233ebfae3c8fb1612f5da052b6d8d931b0b227e16911fd8a4

Analysis

max time kernel
148s
max time network
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
11/11/2026, 22:49

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-11-10_b1be84c001196fa39818f565f88fc59d_elex_wannacry.exe
Size 99KB
Sample261111-2r1mcasthv
SHA256 4dad808dd35f1a8233ebfae3c8fb1612f5da052b6d8d931b0b227e16911fd8a4
MD5 b1be84c001196fa39818f565f88fc59d
SHA1 58fea8b3d940325674bd2283fb9b3a3199e7328c
SHA512 f9c4b7bc9f1378edd5495c67fd3fdc495968bad80562812fae4005f301a2be2fc0a9a0896fe60e2697f2c83e4ea415f546701ad3a82a6d4a61c864c79feaafb3
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcHa:ELRrO10TiJD9yjqrilyxOAa
TLSH
T1D6A3BF5D7893C85EE4048B7047539626B6A26C59FA704F338340BA1EBB37907EDE928D
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion discovery execution farfli persistence spyware stealer

Malware Config

Signatures

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

Detects Farfli Backdoor 3 IoCs

resource	yara_rule
behavioral2/memory/4756-9-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/4756-11-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/4756-14-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4756-9-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4756-11-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4756-14-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 3 IoCs

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

flow	pid	Process
13	4756	rundll32.exe
14	4756	rundll32.exe
16	4756	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
2940	aijrwltb.exe

Executes dropped EXE 1 IoCs

pid	Process
2940	aijrwltb.exe

Loads dropped DLL 1 IoCs

pid	Process
4756	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-1-5-21-1262770251-41185387-1005173349-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\wvvzxeggz\\xfnbp.dll\",QueryPluginInterface"	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)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\i:	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
5292	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	rundll32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	rundll32.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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-11-10_b1be84c001196fa39818f565f88fc59d_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	aijrwltb.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
4280	PING.EXE
5292	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	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
4280	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4756	rundll32.exe
4756	rundll32.exe
4756	rundll32.exe
4756	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4756	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1944	2026-11-10_b1be84c001196fa39818f565f88fc59d_elex_wannacry.exe
2940	aijrwltb.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1944 wrote to memory of 5292	1944	2026-11-10_b1be84c001196fa39818f565f88fc59d_elex_wannacry.exe	90
PID 5292 wrote to memory of 4280	5292	cmd.exe	92
PID 5292 wrote to memory of 2940	5292	cmd.exe	93
PID 2940 wrote to memory of 4756	2940	aijrwltb.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-11-10_b1be84c001196fa39818f565f88fc59d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-10_b1be84c001196fa39818f565f88fc59d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1944
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\aijrwltb.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-10_b1be84c001196fa39818f565f88fc59d_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:5292
- - 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:4280
- - C:\Users\Admin\AppData\Local\Temp\aijrwltb.exe
    C:\Users\Admin\AppData\Local\Temp\\aijrwltb.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-10_b1be84c001196fa39818f565f88fc59d_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2940
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\wvvzxeggz\xfnbp.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\aijrwltb.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)
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4756

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

Indicator Removal

T1070

File Deletion

T1070.004

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

aijrwltb.exe

Path C:\Users\Admin\AppData\Local\Temp\aijrwltb.exe
Size 99KB
SHA256 4a197c08dbf50b1e3cfcf5dbbc3211458688b359bc6e8b1b324da0bd6016bb05
MD5 9de292652cda0b988b38748e75d2d18e
SHA1 edd54dcde8091fa09a5089def1e67e7fad9e1114
SHA512 86ee7dedfa1242cf463d5cb66c3cbd9b4410b4b6c1dd59d806bd5b7d5b8ef3b650a32b6707d5caf11db269d8c036f10a6298138b70ccb9933e8a67f863fc55ef
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcHp:ELRrO10TiJD9yjqrilyxOAp
TLSH
T1EAA3BF5D7C93C85EE4048B7047539626B6A26C59FA704F378340BA1EBB37907EDE928C
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

xfnbp.dll

Path \??\c:\wvvzxeggz\xfnbp.dll
Size 44KB
SHA256 9111c1eb1f0b59dcd49cfd5a0abc0ba100ac59a3bcae8623ff091dfdc46fed3c
MD5 0f12a7d509b2c9bb9b4cd6d8a0325e86
SHA1 f5fb59ad4f0633d115b06f35a2dc161dc4367157
SHA512 e3c84a643ff0a2627daba8a056221985a472aaf07bade61b3e9459db4bfc8792c1347606911e3fcc01581508004b18b5435bcccd5e7617cc6d091f37a5f42e7f
SSDEEP 768:DICzePjle2367kjhrXLdCuYMW8QVnwrLDGe/brbtJyOTuXfADVjeJ2i/MVJWAE:DDePjA23Ukjh37YMonwrvGybrbbRCf4E
TLSH
T1FD23F1A7B94E8D4FC0AE41F7078FC8D422B5589A97A7CB4626008F216CC4FB07E52376
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1944-0-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/1944-2-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/2940-6-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/4756-9-0x0000000010000000-0x0000000010023000-memory.dmp

Download

memory/4756-10-0x0000000001040000-0x0000000001042000-memory.dmp

Download

memory/4756-11-0x0000000010000000-0x0000000010023000-memory.dmp

Download

memory/4756-14-0x0000000010000000-0x0000000010023000-memory.dmp

Download