farfli | 011922cf6a32fde87b02f4e5d8eed4a10d6d58ae70a92fe51fda97d2af2c2542

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
21/04/2026, 03:36

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General

Target
2026-04-21_4dadf63b49fea50d1f5dc3f911646449_elex_wannacry.exe
Size 96KB
Sample260421-d6bd1ahs5k
SHA256 011922cf6a32fde87b02f4e5d8eed4a10d6d58ae70a92fe51fda97d2af2c2542
MD5 4dadf63b49fea50d1f5dc3f911646449
SHA1 b4d51ca71bccc83d6c160626010eae72b6e33730
SHA512 be74e5c04ac59eece171ffe872ea34ef010cd09a6ca683786492c7577c8dd1a7d45f5f0d0f0f1960db561a36e42b94e5ff4fdaba7ec6116b4fdb0bd78e8eb649
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo6ai:el69Ml0TEM
TLSH
T1A8A3AE035BB589C9E5216C34562E773083BEA85D3B1457639388EE4EE837D85EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery 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
behavioral1/memory/3760-10-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/3760-11-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/3760-12-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/3760-13-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/3760-10-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3760-12-0x0000000010000000-0x0000000010032000-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
11	3760	rundll32.exe
12	3760	rundll32.exe
13	3760	rundll32.exe
14	3760	rundll32.exe
28	3760	rundll32.exe
38	3760	rundll32.exe
46	3760	rundll32.exe
47	3760	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000a000000024404-8.dat	acprotect

Deletes itself 1 IoCs

pid	Process
4580	vghsx.exe

Executes dropped EXE 1 IoCs

pid	Process
4580	vghsx.exe

Loads dropped DLL 1 IoCs

pid	Process
3760	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-1-5-21-312252282-3884318443-358092420-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\eeyfr\\nvltu.dll\",DoVirusScan"	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)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	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

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	2026-04-21_4dadf63b49fea50d1f5dc3f911646449_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	vghsx.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
2348	PING.EXE
4728	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
2348	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3760	rundll32.exe
3760	rundll32.exe
3760	rundll32.exe
3760	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3760	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2984	2026-04-21_4dadf63b49fea50d1f5dc3f911646449_elex_wannacry.exe
4580	vghsx.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2984 wrote to memory of 4728	2984	2026-04-21_4dadf63b49fea50d1f5dc3f911646449_elex_wannacry.exe	84
PID 4728 wrote to memory of 2348	4728	cmd.exe	86
PID 4728 wrote to memory of 4580	4728	cmd.exe	87
PID 4580 wrote to memory of 3760	4580	vghsx.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-04-21_4dadf63b49fea50d1f5dc3f911646449_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-21_4dadf63b49fea50d1f5dc3f911646449_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2984
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\vghsx.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-21_4dadf63b49fea50d1f5dc3f911646449_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4728
- - 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:2348
- - \??\c:\vghsx.exe
    c:\vghsx.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-21_4dadf63b49fea50d1f5dc3f911646449_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4580
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\eeyfr\nvltu.dll",DoVirusScan c:\vghsx.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:3760

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

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Downloads

vghsx.exe

Path C:\vghsx.exe
Size 96KB
SHA256 9ea58fc6abfb0dfc62d46022f53d7e82312b458d9a53567cfea2ff3f7b8bb1ec
MD5 98bf561fdb566edf9f672783453ca111
SHA1 888daf8efd9a4bc9fd76189c120eca6d02bc2ee2
SHA512 c0592a52270c3e8532ade2102221d94b4ceb278982c02399279f38e8bd259fe817d2abb60f75b641c0932adceef41d2b633758b2e766685758d1bd266fb700bc
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo6aO:el69Ml0TEE
TLSH
T1ECA3AE035BB589C9E5216C34562E7730C3BEA85D3B1457639388EE4EE837D85EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nvltu.dll

Path \??\c:\eeyfr\nvltu.dll
Size 50KB
SHA256 b2d21c40c5bfc0f7695945946fa1cdd4eaf2f66a8391ddde6307c5f765fbf525
MD5 cbfc06794d16ace6adf42210183fc1b9
SHA1 74fc68a2af225b0aca954b3684940747511013c5
SHA512 181dbe8b63e28a81cb8e0b7240df8745da350e1ab433b157b8b4fd36aa10f0782e807c09563bcffe37cfe64aa1b514b2cc1f179fbcba422d96867179d88e13c9
SSDEEP 768:Z+arYIR3u5v4bGwCl56LNQQe5JBtGf1oTYtx/qQvorLOpqPJ/UP2Gy+OIudD05:ZPrG57TzDxJS6Etx/Zv2OwSy+OIOD05
TLSH
T15733F1ACE2F064F5D0AF6B345952225CF5C26F238D3190DB4A8214BF3C32A5B5B5E721
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2984-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2984-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3760-10-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/3760-11-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/3760-12-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/3760-13-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/4580-7-0x0000000000400000-0x0000000000417000-memory.dmp

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