farfli | b3b54f5f69035de14d8bc8b53b02f5aaf10a399a1d3369e9b2040851cf8ce477

Analysis

max time kernel
148s
max time network
136s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/08/2026, 12:03

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General

Target
2026-08-03_4d60743a673b507775a295a8d8711800_elex_wannacry.exe
Size 91KB
Sample260804-n8d8sav1fx
SHA256 b3b54f5f69035de14d8bc8b53b02f5aaf10a399a1d3369e9b2040851cf8ce477
MD5 4d60743a673b507775a295a8d8711800
SHA1 3232d79474391c7aca361c792ef67a4150a25d81
SHA512 0235024241251273b2ed745c0857f90023b2cabc0a3cbf9071688886b6032a78589d50ec85d171d4ca6e3f1fa8c43d7e52feed17afef1c6d6917cce23add0c19
SSDEEP 1536:cRiAXaKD5g4ZlYjqe2M4VlCmfvrr7EC6QucEqrtmA6AeSWt3SdR:KiAXaKDXZa/4VlCm7fE7QlEKtSNidR
TLSH
T1C893AE066BF4CD62E0A549B51B7307A54E77BC7A2D24C30B9BA1B91E9C30F40EF24369
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/4788-9-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/4788-10-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral2/memory/4788-11-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/4788-12-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4788-9-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4788-11-0x0000000010000000-0x000000001002E000-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
1	4788	rundll32.exe
2	4788	rundll32.exe
3	4788	rundll32.exe
4	4788	rundll32.exe
5	4788	rundll32.exe
6	4788	rundll32.exe
7	4788	rundll32.exe
8	4788	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5896	pnpctzvy.exe

Executes dropped EXE 1 IoCs

pid	Process
5896	pnpctzvy.exe

Loads dropped DLL 1 IoCs

pid	Process
4788	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:\\dizjj\\zyblx.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)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	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)	\??\q:	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)	\??\i:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	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
4172	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	pnpctzvy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-03_4d60743a673b507775a295a8d8711800_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
4172	cmd.exe
1540	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
1540	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4788	rundll32.exe
4788	rundll32.exe
4788	rundll32.exe
4788	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4788	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3948	2026-08-03_4d60743a673b507775a295a8d8711800_elex_wannacry.exe
5896	pnpctzvy.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3948 wrote to memory of 4172	3948	2026-08-03_4d60743a673b507775a295a8d8711800_elex_wannacry.exe	89
PID 4172 wrote to memory of 1540	4172	cmd.exe	91
PID 4172 wrote to memory of 5896	4172	cmd.exe	92
PID 5896 wrote to memory of 4788	5896	pnpctzvy.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-03_4d60743a673b507775a295a8d8711800_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-03_4d60743a673b507775a295a8d8711800_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3948
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\pnpctzvy.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_4d60743a673b507775a295a8d8711800_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:4172
- - 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:1540
- - \??\c:\pnpctzvy.exe
    c:\pnpctzvy.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_4d60743a673b507775a295a8d8711800_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5896
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\dizjj\zyblx.dll",GetWindowClass c:\pnpctzvy.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:4788

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

zyblx.dll

Path \??\c:\dizjj\zyblx.dll
Size 46KB
SHA256 615e79da4fd5512e796a7aa7335791445c4419564a62065b96ec6af4f45c5da0
MD5 e1b69009b84a57990f394d671390ed02
SHA1 586cb5213c9cbdfe5ce94a284c324d917cc52903
SHA512 c78b9484fa33cf5379257ab965d56b229d696fe262367a180bf7b50691b0c51e5a07dc7b96be07cf977ea0aab9ce29c503c4f36c4009ec480e2fb0498ffc13bc
SSDEEP 768:KsUfnvxs6iLlhpfFPtnQf7kifD/v7yb9BEtoyviA1129Vvi3UTP:KsJT1qf4W/vub9yNiA118d+kP
TLSH
T17823F2A947B44EB3E2BD0779889187DC69BD6D26173384054A6301DF7C70443EA6C6EE
MD5 SHA1 SHA512 SSDEEP TLSH

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pnpctzvy.exe

Path \??\c:\pnpctzvy.exe
Size 91KB
SHA256 3b60ba8bcf687c651a9c7ebb6d4ff6175215428ad7a08b411cdf747f1156cfd9
MD5 23b799224ea8348ece3f38abf203f479
SHA1 2a5780e98b578ba13218a76f4aa3888b320bf143
SHA512 27669dc70289ec5a4fb508de538e8bf6c437d9c7b28a23fac1b3c900ad413ec37e742f2c11fbcd9b5d9bff9939eef4c6884f254b2a5c26e1f5cfb9902301189d
SSDEEP 1536:cRiAXaKD5g4ZlYjqe2M4VlCmfvrr7EC6QucEqrtmA6AeSWt3SdRD:KiAXaKDXZa/4VlCm7fE7QlEKtSNidRD
TLSH
T19293AE166BF4CD62E0A549B5177707A54E77BC7A2D24C30B9BA0B91E9C30F40EF24369
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3948-0-0x0000000000400000-0x000000000041B000-memory.dmp

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memory/3948-2-0x0000000000400000-0x000000000041B000-memory.dmp

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memory/4788-9-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4788-10-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4788-11-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4788-12-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/5896-6-0x0000000000400000-0x000000000041B000-memory.dmp

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