farfli | 4ad404c17881fd76e47bc162fc45f4a590a7577843818bcbb4f079d33701d24d

Analysis

max time kernel
150s
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
16/08/2026, 10:33

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General

Target
2026-08-16_86b85534f378079306db6ad29bac7621_elex_wannacry.exe
Size 88KB
Sample260816-mlvftawalb
SHA256 4ad404c17881fd76e47bc162fc45f4a590a7577843818bcbb4f079d33701d24d
MD5 86b85534f378079306db6ad29bac7621
SHA1 9bdc0ebfce5565aae72a5bbf4a15ef75ec06cd46
SHA512 49c67463191098a52d123275a48622c47022388a75f38f9d2f02296662fb4c237d98d5d43c79e61012ad2cba0c329ed139098c8fa4d9d98ba17f94431b540e29
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSdY:a14ZaKOTZSMcJVgDKxAH9MhtfSdY
TLSH
T10793BF232BBB4175DD44AFB11F6B5625E6F2BC36212082728B5C9A8DEA3CF45DB0131C
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 3 IoCs

resource	yara_rule
behavioral2/memory/5840-11-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/5840-14-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/5840-17-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/5840-11-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5840-14-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5840-17-0x0000000010000000-0x0000000010021000-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	5840	rundll32.exe
8	5840	rundll32.exe
9	5840	rundll32.exe
11	5840	rundll32.exe
12	5840	rundll32.exe
14	5840	rundll32.exe
16	5840	rundll32.exe
18	5840	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1112	cwvzgzf.exe

Executes dropped EXE 1 IoCs

pid	Process
1112	cwvzgzf.exe

Loads dropped DLL 1 IoCs

pid	Process
5840	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-1-5-21-552508041-2681165170-3229858294-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\lgizye\\kzcdz.dll\",GetWindowClass"	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)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\t:	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)	\??\d:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	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
3944	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cwvzgzf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-16_86b85534f378079306db6ad29bac7621_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
3944	cmd.exe
4080	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
4080	PING.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
5840	rundll32.exe
5840	rundll32.exe
5840	rundll32.exe
5840	rundll32.exe
5840	rundll32.exe
5840	rundll32.exe
5840	rundll32.exe
5840	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5840	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3704	2026-08-16_86b85534f378079306db6ad29bac7621_elex_wannacry.exe
1112	cwvzgzf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3704 wrote to memory of 3944	3704	2026-08-16_86b85534f378079306db6ad29bac7621_elex_wannacry.exe	88
PID 3944 wrote to memory of 4080	3944	cmd.exe	91
PID 3944 wrote to memory of 1112	3944	cmd.exe	92
PID 1112 wrote to memory of 5840	1112	cwvzgzf.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-16_86b85534f378079306db6ad29bac7621_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-16_86b85534f378079306db6ad29bac7621_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3704
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\cwvzgzf.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-16_86b85534f378079306db6ad29bac7621_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:3944
- - 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:4080
- - \??\c:\cwvzgzf.exe
    c:\cwvzgzf.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-16_86b85534f378079306db6ad29bac7621_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1112
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\lgizye\kzcdz.dll",GetWindowClass c:\cwvzgzf.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:5840

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

cwvzgzf.exe

Path \??\c:\cwvzgzf.exe
Size 88KB
SHA256 543cd7898cb6e383ed55fa8b27408d1a1e9d22f93e1adecf8ef5f2f14786cf82
MD5 9abd2b6ba7dfc6b75c25c95dd6c823e9
SHA1 112a6e611475ab06c6321a8368991d845a917207
SHA512 4018f329c04bc61edc1c627e0767e7970198f90b6de447ea11588f14fc96e2d509ff8628d6ab8a39b309224da8eaca3d94bb4dc187026bf2f8edfa96aea3ada8
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSdZ:a14ZaKOTZSMcJVgDKxAH9MhtfSdZ
TLSH
T1B193BF232BBB4175ED44AFB11F6B5625E6E2BC36312082728B5C9A8DE93CF05DB1131C
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

kzcdz.dll

Path \??\c:\lgizye\kzcdz.dll
Size 43KB
SHA256 0b747c32730f2ad29b44299054bc22f8075702b081e91edaaead528abca227d2
MD5 0164aeb78f4d2181e817a9a6b0ad22f1
SHA1 c56c6a743e48e8652707a34e4cddc1f645f140ea
SHA512 e69ad90790d8062a903954f7ea85cacd241113afaf0eb16098f473835cffcda6e1f9fa9844a8618cc297fffa2e6ff7d458f9ebb2ce3febf7ffd683ffd6ad44f5
SSDEEP 768:2DdBa8mqIOiSUZrBGhvQLq6UYiaKRsRMwwY2BjkTrXW/VJZ581swUqHhiQREQoJs:kwqnPUb+v0q6UY+sRMwwY2Jkal+1ZUqJ
TLSH
T19613F133EACCDFDFF8A05271C576D0FCD337AC2849669A0395A0219D9D60948B878F66
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1112-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3704-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3704-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5840-9-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/5840-10-0x0000000000FC0000-0x0000000000FC2000-memory.dmp

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memory/5840-11-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/5840-12-0x0000000000FC0000-0x0000000000FC2000-memory.dmp

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memory/5840-14-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/5840-17-0x0000000010000000-0x0000000010021000-memory.dmp

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