farfli | 7dd4a88e37001a7a0a21f55c3a28a421ad60d45f1255301f67cff35e52185d7d

Analysis

max time kernel
148s
max time network
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
15/08/2026, 12:13

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General

Target
2026-08-15_a2301fdd16e0c66e7072be7e713230a5_elex_wannacry.exe
Size 97KB
Sample260815-pd5mxsff45
SHA256 7dd4a88e37001a7a0a21f55c3a28a421ad60d45f1255301f67cff35e52185d7d
MD5 a2301fdd16e0c66e7072be7e713230a5
SHA1 25bf46ccba7da17bc1b4a60b5d294282d5997b50
SHA512 ecc5eaf9516828dc563c5cc2fa10c0e0f23a212896a7a794fed7619e6b2bdc8b76ca0841e15ebde5818511ed0cd915447c78d7c31bb10465410cc4e3e9deee1a
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo60:el69Ml0TE
TLSH
T112A3AE035BB588C9F5216C70562E773087BEA85E3F1457639388EE4EE437D85EC3628A
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 4 IoCs

resource	yara_rule
behavioral2/memory/2936-10-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/2936-9-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/2936-11-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/2936-12-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/2936-9-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2936-11-0x0000000010000000-0x0000000010032000-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
7	2936	rundll32.exe
8	2936	rundll32.exe
9	2936	rundll32.exe
11	2936	rundll32.exe
12	2936	rundll32.exe
15	2936	rundll32.exe
17	2936	rundll32.exe
21	2936	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000e00000001c51e-7.dat	acprotect

Deletes itself 1 IoCs

pid	Process
4500	buxqprdi.exe

Executes dropped EXE 1 IoCs

pid	Process
4500	buxqprdi.exe

Loads dropped DLL 1 IoCs

pid	Process
2936	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-1-5-21-189034102-168398478-1159367937-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\wnelbeww\\ezsnu.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)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	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)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	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
1668	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	2026-08-15_a2301fdd16e0c66e7072be7e713230a5_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	buxqprdi.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
1668	cmd.exe
2472	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
2472	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2936	rundll32.exe
2936	rundll32.exe
2936	rundll32.exe
2936	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2936	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4852	2026-08-15_a2301fdd16e0c66e7072be7e713230a5_elex_wannacry.exe
4500	buxqprdi.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4852 wrote to memory of 1668	4852	2026-08-15_a2301fdd16e0c66e7072be7e713230a5_elex_wannacry.exe	89
PID 1668 wrote to memory of 2472	1668	cmd.exe	91
PID 1668 wrote to memory of 4500	1668	cmd.exe	92
PID 4500 wrote to memory of 2936	4500	buxqprdi.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-15_a2301fdd16e0c66e7072be7e713230a5_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-15_a2301fdd16e0c66e7072be7e713230a5_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4852
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\buxqprdi.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-15_a2301fdd16e0c66e7072be7e713230a5_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:1668
- - 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:2472
- - \??\c:\buxqprdi.exe
    c:\buxqprdi.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-15_a2301fdd16e0c66e7072be7e713230a5_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4500
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\wnelbeww\ezsnu.dll",DoVirusScan c:\buxqprdi.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:2936

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

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

buxqprdi.exe

Path \??\c:\buxqprdi.exe
Size 97KB
SHA256 44958b455efef9555d2edcd33c62ffba12ed41b87e315d7189434cb4e396115f
MD5 0f4fe3665c52f64483c7cb45f1f889c3
SHA1 46d2bc16ed40ed97daf48aefb24381ba27e588f6
SHA512 73a7f8c2b8f680de333b8e7d9275bd33772f6b60e4111ffda2ad8af3e6dc019d3d275d234073216fdd4dede29037ff7739683d19e2107e0228fc1518d9bfbb53
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo60Z:el69Ml0TEN
TLSH
T1A2A3AE035BB489C9F5216C70562E773087BEA85E3F1457639388EE4EE437D85EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

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ezsnu.dll

Path \??\c:\wnelbeww\ezsnu.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/2936-10-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/2936-9-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/2936-11-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/2936-12-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/4500-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4852-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4852-2-0x0000000000400000-0x0000000000417000-memory.dmp

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