farfli | 6088c50e7c190204446c4c6c43b48426f9d66c928e2a1a77f5e97cc23974f4b8

General

Target
2026-07-20_1ca3d7d30ea23e9f9eacf2a271f477bf_elex_wannacry.exe
Size 97KB
Sample260720-n565dsbv81
SHA256 6088c50e7c190204446c4c6c43b48426f9d66c928e2a1a77f5e97cc23974f4b8
MD5 1ca3d7d30ea23e9f9eacf2a271f477bf
SHA1 992a92ca253c1c8ea66006c64820c0063562c4aa
SHA512 008f3906367b0ede8a9cb12f6e4fed0ddecd5829b9c2f12fdf6e0378f75d3364957c5dd5b788a09a822e739593d7165422b7a2a9c41f6ad83ad5396a28b5d226
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo6S:el69Ml0TEZ
TLSH
T139A3AF03ABA589D9F5216C30562E773087BFA85D3F1457639348EE4EE437D81EC3628A
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 1 IoCs

resource	yara_rule
behavioral1/memory/3912-11-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 1 IoCs

resource	yara_rule
behavioral1/memory/3912-11-0x0000000010000000-0x0000000010032000-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
16	3912	rundll32.exe
20	3912	rundll32.exe
21	3912	rundll32.exe
40	3912	rundll32.exe
54	3912	rundll32.exe
68	3912	rundll32.exe
76	3912	rundll32.exe
81	3912	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x0008000000024435-8.dat	acprotect

Deletes itself 1 IoCs

pid	Process
2952	unvba.exe

Executes dropped EXE 1 IoCs

pid	Process
2952	unvba.exe

Loads dropped DLL 1 IoCs

pid	Process
3912	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-1-5-21-1788976790-1541110888-1636651838-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\lwupubea\\wfsmib.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)	\??\s:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	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)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\v:	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)	\??\o:	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
3352	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	unvba.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-20_1ca3d7d30ea23e9f9eacf2a271f477bf_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

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
3352	cmd.exe
2384	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
2384	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3912	rundll32.exe
3912	rundll32.exe
3912	rundll32.exe
3912	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3912	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4912	2026-07-20_1ca3d7d30ea23e9f9eacf2a271f477bf_elex_wannacry.exe
2952	unvba.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4912 wrote to memory of 3352	4912	2026-07-20_1ca3d7d30ea23e9f9eacf2a271f477bf_elex_wannacry.exe	85
PID 3352 wrote to memory of 2384	3352	cmd.exe	87
PID 3352 wrote to memory of 2952	3352	cmd.exe	88
PID 2952 wrote to memory of 3912	2952	unvba.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-07-20_1ca3d7d30ea23e9f9eacf2a271f477bf_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-20_1ca3d7d30ea23e9f9eacf2a271f477bf_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4912
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\unvba.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-20_1ca3d7d30ea23e9f9eacf2a271f477bf_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:3352
- - 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:2384
- - \??\c:\unvba.exe
    c:\unvba.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-20_1ca3d7d30ea23e9f9eacf2a271f477bf_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2952
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\lwupubea\wfsmib.dll",DoVirusScan c:\unvba.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:3912

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

Modify Registry

1

T1112

Pre-OS Boot

1

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

unvba.exe

Path C:\unvba.exe
Size 97KB
SHA256 04423a033eebf9af85980f5a2865e44573d884ddf23769569e34f1b775c04ab4
MD5 e99f37fa7dd066febbb70ef2e51c80d9
SHA1 374ebb09cd4460c48cae03920da83fdc88f9a3ab
SHA512 3452f02e54d5bbd80077979947b49623cb8702a2157b3f3aab852bdcd0774f00926242f537fb6fa018e64467c4a32077ffaa720cfa2ea8a5cf774fdfe69ba510
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo6P:el69Ml0TEY
TLSH
T161A3AE03ABA589D9F5217C30562E773087BEA85D3F1457639348EE4EE437D81EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

wfsmib.dll

Path \??\c:\lwupubea\wfsmib.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/2952-7-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/3912-10-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/3912-11-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/4912-0-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/4912-2-0x0000000000400000-0x0000000000417000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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