farfli | 3da3e772a43695bea2bd62548a886db616c324aa2feca9f688882bd8e4ff1303

Analysis

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

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
07/11/2026, 03:32

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General

Target
2026-11-05_3dd710a2f91cb44c007d552b7c39026b_elex_wannacry.exe
Size 264KB
Sample261107-d3xstsav2l
SHA256 3da3e772a43695bea2bd62548a886db616c324aa2feca9f688882bd8e4ff1303
MD5 3dd710a2f91cb44c007d552b7c39026b
SHA1 aa2e1bb9ad8ee21c2123b773544944420285a050
SHA512 20adcb5bf55d763fd52a3ba9608e8fdb0f4500e82e0834ac78296c2f4a959df67ebd334a98c3a42888234db76cdd6c2a286128ec4076467a1af060ed0e087c9d
SSDEEP 6144:H8AbwMmJOyOK5ZV7NHPR519jtr5a8MueZG7HF:PwVJOp8FNprdrMul7l
TLSH
T10C44DF11F622C945E4724C3176AE59298724FC15EB0CB687E3F46F0FDC2EE92A93C256
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion discovery execution farfli persistence spyware stealer upx

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/4464-10-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli
behavioral2/memory/4464-12-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli
behavioral2/memory/4464-15-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4464-10-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4464-12-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4464-15-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral2/memory/3116-6-0x0000000000400000-0x000000000043A000-memory.dmp	UPX
behavioral2/files/0x000e00000001c54e-7.dat	UPX
behavioral2/memory/4464-9-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/4464-10-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/4464-12-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/4464-15-0x0000000010000000-0x000000001003D000-memory.dmp	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
8	4464	rundll32.exe
10	4464	rundll32.exe
11	4464	rundll32.exe
12	4464	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3116	lnluh.exe

Executes dropped EXE 1 IoCs

pid	Process
3116	lnluh.exe

Loads dropped DLL 1 IoCs

pid	Process
4464	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-1-5-21-696679853-3915825385-3233721679-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\fdtuwwbix\\shnlywwo.hls\",RAFlush"	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)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	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

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000e00000001c54e-7.dat	upx
behavioral2/memory/4464-9-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4464-10-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4464-12-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4464-15-0x0000000010000000-0x000000001003D000-memory.dmp	upx

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
6056	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	lnluh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-11-05_3dd710a2f91cb44c007d552b7c39026b_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
6056	cmd.exe
1476	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
1476	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe
4464	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4464	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
500	2026-11-05_3dd710a2f91cb44c007d552b7c39026b_elex_wannacry.exe
3116	lnluh.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 500 wrote to memory of 6056	500	2026-11-05_3dd710a2f91cb44c007d552b7c39026b_elex_wannacry.exe	89
PID 6056 wrote to memory of 1476	6056	cmd.exe	91
PID 6056 wrote to memory of 3116	6056	cmd.exe	92
PID 3116 wrote to memory of 4464	3116	lnluh.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-11-05_3dd710a2f91cb44c007d552b7c39026b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-05_3dd710a2f91cb44c007d552b7c39026b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:500
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\lnluh.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-05_3dd710a2f91cb44c007d552b7c39026b_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:6056
- - 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:1476
- - C:\Users\Admin\AppData\Local\Temp\lnluh.exe
    C:\Users\Admin\AppData\Local\Temp\\lnluh.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-05_3dd710a2f91cb44c007d552b7c39026b_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3116
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\fdtuwwbix\shnlywwo.hls",RAFlush C:\Users\Admin\AppData\Local\Temp\lnluh.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:4464

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

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Downloads

lnluh.exe

Path C:\Users\Admin\AppData\Local\Temp\lnluh.exe
Size 264KB
SHA256 f17e35f8400bb623e98d6fa0e1459dab1a966b5cb8122b20ee9068988670a540
MD5 f1fdf7115973f90507b7288e23c9abab
SHA1 a10c412b24468336236e2a950a2350c9dd83aad2
SHA512 64ddf8469117c52de68e7ca26f708f469245c217f646ac1d54899fbab004722a67ff919ba2eb42987ec772b635300b47b2d4bb966a66aa70ab5f9e4f4dfefc40
SSDEEP 6144:H8AbwMmJOyOK5ZV7NHPR519jtr5a8MueZG7HO:PwVJOp8FNprdrMul7u
TLSH
T18B44DF11F622C945E4724C3176AE59298724FC15EB0CB687E3F46F0FDC2EE92A93C256
MD5 SHA1 SHA512 SSDEEP TLSH

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shnlywwo.hls

Path \??\c:\fdtuwwbix\shnlywwo.hls
Size 81KB
SHA256 2973a0957bd204e123307415bade58f84cdf272c659048a99bf42dfdb563415a
MD5 fe3b1b222244f783fe9927ff16813c45
SHA1 69c88427b6fe1b75b4f5dc51d7dcce1bc438de9b
SHA512 ad16236d7b0bca4f021d031c8c75c5a339218f6e27dd8be62dfc3719cf945ba832ec6c4c04483622431ed545125415ca03a636a22b2d4f13cc9545fffbe7bd64
SSDEEP 1536:gz2wGkhJuwe4428NPz+Sczth8kgodmbxLhevko1pLHKDwJ:gzzTw4kN7TEtmbFhebJKsJ
TLSH
T1D783AD8AEB9E4B3EE84D4633AD929D31DC27FB5526588F7A43FC102CEE46752B200107
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/500-0-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/500-2-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/3116-6-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/4464-9-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/4464-10-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/4464-12-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/4464-15-0x0000000010000000-0x000000001003D000-memory.dmp

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