farfli | 0de3490a6e04dc68b2c30c19bea170188e7d8435f56c5cfc840f6cafc7f548de

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
24/10/2026, 22:39

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General

Target
2026-10-22_0743bf2a41b075b6e42ea61f6ce345c8_elex_wannacry.exe
Size 151KB
Sample261024-2k589aew3n
SHA256 0de3490a6e04dc68b2c30c19bea170188e7d8435f56c5cfc840f6cafc7f548de
MD5 0743bf2a41b075b6e42ea61f6ce345c8
SHA1 5a1dc61720f18edd45cf9d8664a8d22fc5f37c57
SHA512 fff30941545f7f9ac459b279af60b294c1fcb4539e22013e62765720596ced28d7a7d642f625fce0d00c2c2025b9cf537af0bbb560507dca9e27de16e517ee18
SSDEEP 3072:KK4RNx65b4RoIwZpx10ZENfrGSQ7sDU/ySkNAq1:Kl65xiZuKoDkySkNA+
TLSH
T143E3DFCE1B7ACEDBD2201C75D0B456F792669CD9DA2147974381FD9EB432CC1AC3222A
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 2 IoCs

resource	yara_rule
behavioral2/memory/4988-11-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/4988-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4988-11-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4988-12-0x0000000010000000-0x000000001002E000-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	4988	rundll32.exe
8	4988	rundll32.exe
10	4988	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4204	wjdhudzmn.exe

Executes dropped EXE 1 IoCs

pid	Process
4204	wjdhudzmn.exe

Loads dropped DLL 1 IoCs

pid	Process
4988	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-1-5-21-4154726816-2055034831-2297277433-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\izfjm\\gvjiuzic.dll\",init"	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)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	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)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\p:	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)	\??\z:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\h:	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
1424	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	2026-10-22_0743bf2a41b075b6e42ea61f6ce345c8_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	wjdhudzmn.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
1424	cmd.exe
2840	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2840	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4988	rundll32.exe
4988	rundll32.exe
4988	rundll32.exe
4988	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4988	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3300	2026-10-22_0743bf2a41b075b6e42ea61f6ce345c8_elex_wannacry.exe
4204	wjdhudzmn.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3300 wrote to memory of 1424	3300	2026-10-22_0743bf2a41b075b6e42ea61f6ce345c8_elex_wannacry.exe	89
PID 1424 wrote to memory of 2840	1424	cmd.exe	91
PID 1424 wrote to memory of 4204	1424	cmd.exe	92
PID 4204 wrote to memory of 4988	4204	wjdhudzmn.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-10-22_0743bf2a41b075b6e42ea61f6ce345c8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-22_0743bf2a41b075b6e42ea61f6ce345c8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3300
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\wjdhudzmn.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-22_0743bf2a41b075b6e42ea61f6ce345c8_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:1424
- - 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:2840
- - \??\c:\wjdhudzmn.exe
    c:\wjdhudzmn.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-22_0743bf2a41b075b6e42ea61f6ce345c8_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4204
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\izfjm\gvjiuzic.dll",init c:\wjdhudzmn.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:4988

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

Replay Monitor

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Downloads

gvjiuzic.dll

Path \??\c:\izfjm\gvjiuzic.dll
Size 42KB
SHA256 c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7
MD5 36e3fb5964d663272cf1169e1e1ca478
SHA1 58115e08b49505bcbbb5c88a28a86222ba18d5d4
SHA512 daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442
SSDEEP 768:t0inj1jJ5OeUMhBNSqHvMjjAipMkuG30sv2xEZkWldADAKPIp:t0ipV5uMhBt0jjAiusv22ZkWTOAKP8
TLSH
T1D813E19B6BEC7029FDD22BB4F4F66815EEB63F388CB2C70E114941AB1C3A9D51251706
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

wjdhudzmn.exe

Path \??\c:\wjdhudzmn.exe
Size 151KB
SHA256 208f8e13309caede9fda11ff034bf4a17e6dd248bf769d0f7ae7c6a01103cc2f
MD5 82ba5cf3244814ea6119167519041039
SHA1 1729da278a5062acaa00dc1a4f4dc90034cff16f
SHA512 8e250d9b17f2eaab3e333326527c0322ad2c0fddf215db4c7b497853adfd9c080e0ab90e38d804b7a595d9b8f6b7db24cb588e2c977801ace326eb954a912548
SSDEEP 3072:KK4RNx65b4RoIwZpx10ZENfrGSQ7sDU/ySkNAq7:Kl65xiZuKoDkySkNAu
TLSH
T1D0E3DFCE1B7ACEDBD2201C75D0B416F792669CD9DA2157974381FD9EB432CC1AC3222A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3300-0-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/3300-2-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/4204-6-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/4988-9-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4988-10-0x0000000002A80000-0x0000000002A81000-memory.dmp

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memory/4988-11-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4988-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4988-13-0x0000000002A80000-0x0000000002A81000-memory.dmp

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