farfli | 2c2d60cc2058f56d85616ffe1c5e8348f3d36b76e04c072652dc555783fa0b70

General

Target
2026-09-23_20791a9fac491dbf545625848dd3b34b_elex_wannacry.exe
Size 130KB
Sample260924-py47wstgqa
SHA256 2c2d60cc2058f56d85616ffe1c5e8348f3d36b76e04c072652dc555783fa0b70
MD5 20791a9fac491dbf545625848dd3b34b
SHA1 e6b635df47e36522100b663244a1cda8d9dcf720
SHA512 6853d847b41629b2a1746451c0c58e64ef53b01ad0b7dd277b4571d4296c67db8a76e8b7b23edb4b77771a0984725b040024d474f9574262f5474b34b0a48b80
SSDEEP 1536:f/6EkrKHqgGFs5N6s7H3dPT+X/O3DX6HZ9am1AEgHZ5bdpDvkDBlxZP1nU:fSKP3Pe/Oz67aKVgbbdpDcljZ9nU
TLSH
T1B5D3BF527A6085F0E01645335397AB3186B1EC5D3A1813EE93C8EF0FBD65725ECBB298
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 2 IoCs

resource	yara_rule
behavioral2/memory/5152-9-0x0000000010000000-0x0000000010030000-memory.dmp	family_farfli
behavioral2/memory/5152-10-0x0000000010000000-0x0000000010030000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/5152-9-0x0000000010000000-0x0000000010030000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5152-10-0x0000000010000000-0x0000000010030000-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
8	5152	rundll32.exe
7	5152	rundll32.exe
10	5152	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3440	wfubwwge.exe

Executes dropped EXE 1 IoCs

pid	Process
3440	wfubwwge.exe

Loads dropped DLL 1 IoCs

pid	Process
5152	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-1-5-21-560646293-820748483-2532804640-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\kftnh\\gnwpu.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)	\??\a:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	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 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4120-0-0x0000000000400000-0x000000000041E000-memory.dmp	upx
behavioral2/memory/4120-2-0x0000000000400000-0x000000000041E000-memory.dmp	upx
behavioral2/files/0x000600000001b84b-3.dat	upx
behavioral2/memory/3440-6-0x0000000000400000-0x000000000041E000-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
4624	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-09-23_20791a9fac491dbf545625848dd3b34b_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	wfubwwge.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
4624	cmd.exe
3632	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
3632	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5152	rundll32.exe
5152	rundll32.exe
5152	rundll32.exe
5152	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5152	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4120	2026-09-23_20791a9fac491dbf545625848dd3b34b_elex_wannacry.exe
3440	wfubwwge.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4120 wrote to memory of 4624	4120	2026-09-23_20791a9fac491dbf545625848dd3b34b_elex_wannacry.exe	89
PID 4624 wrote to memory of 3632	4624	cmd.exe	91
PID 4624 wrote to memory of 3440	4624	cmd.exe	92
PID 3440 wrote to memory of 5152	3440	wfubwwge.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-09-23_20791a9fac491dbf545625848dd3b34b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-23_20791a9fac491dbf545625848dd3b34b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4120
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\wfubwwge.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-23_20791a9fac491dbf545625848dd3b34b_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:4624
- - 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:3632
- - C:\Users\Admin\AppData\Local\Temp\wfubwwge.exe
    C:\Users\Admin\AppData\Local\Temp\\wfubwwge.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-23_20791a9fac491dbf545625848dd3b34b_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3440
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\kftnh\gnwpu.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\wfubwwge.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:5152

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

Indicator Removal

1

T1070

File Deletion

Modify Registry

Pre-OS Boot

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

wfubwwge.exe

Path C:\Users\Admin\AppData\Local\Temp\wfubwwge.exe
Size 131KB
SHA256 7a9c8a405ba108a020035397e87428be5771c4f11c7b9df9e688501d0ac1d349
MD5 b96415ea6996195e204328e716963886
SHA1 2bece038a3f63a2a1365190fec1a45a4f8ef6ab7
SHA512 aa8776765228ffd55658f9a560a86fc48f413c4292c4233552b38d8a2a118ba61dd55fd903d2c7634b62da556e97d4b77a649c3c29b3cb6bbf7c474ad37b07f6
SSDEEP 1536:f/6EkrKHqgGFs5N6s7H3dPT+X/O3DX6HZ9am1AEgHZ5bdpDvkDBlxZP1n4:fSKP3Pe/Oz67aKVgbbdpDcljZ9n4
TLSH
T1A7D3BF527A6085F0E01645335397AB3186B1DC5D3A1813EE93C8EF0FBD65B25ECBB298
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

gnwpu.dll

Path \??\c:\kftnh\gnwpu.dll
Size 59KB
SHA256 12264670242948b129acc4d9cd80cdf83fac88e662c09a57ce5ac6b39510618d
MD5 8552951ec6ab253e038ffc809235b08c
SHA1 c59e347bfebd96c0e4b60a0d33b5923fb137af55
SHA512 17864dfff89f397c647ec02926cfd639e33a05061cb6164756afd3d8c4e24281cba9c4770d16927ba56e1e02a139faf970748bfe07454f4528eab9f87e2c0cd9
SSDEEP 1536:x0u5H+DyujZ2uoHzCf/IYmRGMJnc7Z4ch:x04eDyY/oH8SIMJncNnh
TLSH
T12843F21CE351855BDAAB0672678F6F407A238A7F5B32485A914C2454BF3BE77C937380
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3440-6-0x0000000000400000-0x000000000041E000-memory.dmp

Download

memory/4120-0-0x0000000000400000-0x000000000041E000-memory.dmp

Download

memory/4120-2-0x0000000000400000-0x000000000041E000-memory.dmp

Download

memory/5152-9-0x0000000010000000-0x0000000010030000-memory.dmp

Download

memory/5152-10-0x0000000010000000-0x0000000010030000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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