farfli | 25627d1216a8c2327930cac953d15bb1a717b9e48712535253a08851ee16315a

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
23/10/2026, 05:36

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General

Target
2026-10-23_f80d213f8a9c325bf1166b94a5600239_elex_wannacry.exe
Size 97KB
Sample261023-gap43ab16p
SHA256 25627d1216a8c2327930cac953d15bb1a717b9e48712535253a08851ee16315a
MD5 f80d213f8a9c325bf1166b94a5600239
SHA1 4d088778ffae5ed4dc142c94de4ca9182fc0b0e7
SHA512 8cd1af9fd2cbab7b6f3d55ad3f25d1c833022f88ec3f56e1eea1860196980831d9cd7da42379364a83318fe0ac969a8c322f53391c13ba009d2351c4714a95a3
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo6E:el69Ml0TEr
TLSH
T188A3AE17ABA588C9F1217C30566E373587BF985E3F1457A79348EE4E9433D80EC3628A
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 4 IoCs

resource	yara_rule
behavioral2/memory/3364-9-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/3364-10-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/3364-11-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/3364-12-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/3364-9-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3364-11-0x0000000010000000-0x0000000010032000-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
7	3364	rundll32.exe
8	3364	rundll32.exe
10	3364	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000e00000001c527-7.dat	acprotect

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3452	ayvvadz.exe

Executes dropped EXE 1 IoCs

pid	Process
3452	ayvvadz.exe

Loads dropped DLL 1 IoCs

pid	Process
3364	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-1-5-21-4280978039-528710165-233981602-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\qjsay\\uncus.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)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	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
2648	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ayvvadz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-23_f80d213f8a9c325bf1166b94a5600239_elex_wannacry.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
2648	cmd.exe
4276	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
4276	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3364	rundll32.exe
3364	rundll32.exe
3364	rundll32.exe
3364	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3364	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4092	2026-10-23_f80d213f8a9c325bf1166b94a5600239_elex_wannacry.exe
3452	ayvvadz.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 2648	4092	2026-10-23_f80d213f8a9c325bf1166b94a5600239_elex_wannacry.exe	89
PID 2648 wrote to memory of 4276	2648	cmd.exe	91
PID 2648 wrote to memory of 3452	2648	cmd.exe	92
PID 3452 wrote to memory of 3364	3452	ayvvadz.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-10-23_f80d213f8a9c325bf1166b94a5600239_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-23_f80d213f8a9c325bf1166b94a5600239_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4092
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\ayvvadz.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-23_f80d213f8a9c325bf1166b94a5600239_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:2648
- - 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:4276
- - \??\c:\ayvvadz.exe
    c:\ayvvadz.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-23_f80d213f8a9c325bf1166b94a5600239_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3452
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\qjsay\uncus.dll",DoVirusScan c:\ayvvadz.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:3364

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

ayvvadz.exe

Path \??\c:\ayvvadz.exe
Size 97KB
SHA256 09a8b11abaf89b4897fbc10e1d1d0f5df83f9add4052cf5074982b7cf5cd795e
MD5 ade40451aff69c6cd1916d80ac396fce
SHA1 552f62ed7a010c9f83cf7430fa77bfb1a04c5427
SHA512 5c45e393ce8ace30f8e9b2a91ce6200ca45b5b1fca98451ecfec08b4f90719bb3161b7b25ba554f150e68f6c7f2eb03766be664ead662a0294f1517a92834bc5
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo6N:el69Ml0TEo
TLSH
T13FA3AE17ABA588C9F1217C30566E373587BF985E3F1457A79348EE4E9433D80EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

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uncus.dll

Path \??\c:\qjsay\uncus.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/3364-9-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/3364-10-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/3364-11-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/3364-12-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/3452-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4092-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4092-2-0x0000000000400000-0x0000000000417000-memory.dmp

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