farfli | 44746a44239dc480283b635e8ce346efa7a023d94e0ac3dba50be2f903f35f6b

Analysis

max time kernel
148s
max time network
138s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
13/11/2026, 11:00

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-11-11_651ebc59bb8bab90d1ee45d05c8493e2_elex_wannacry.exe
Size 123KB
Sample261113-m4fqdatw8n
SHA256 44746a44239dc480283b635e8ce346efa7a023d94e0ac3dba50be2f903f35f6b
MD5 651ebc59bb8bab90d1ee45d05c8493e2
SHA1 c976ef90ed2fc7b0826c4626394ab919d980d957
SHA512 462e3d060670e6edd1c6754981ef1545d48d222a4cc2aa5b3649b71bbdadd958c7465a9ef78a8151c9a593d0ec5ed6321feccc86adfc03324763a62c188a3531
SSDEEP 1536:N/14ZaKO/mHFqDMt8vdDMwgUmyZRTzeueKXOYDoAQLG7Y1iWtXoa:Z14ZaKOytU//RXeu7OWoAQJpYa
TLSH
T175C33A0327F98195F0B63E73567A19204AB2BCD87D38CE1E5F54664E9970F30DA633A2
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 5 IoCs

resource	yara_rule
behavioral2/memory/1264-11-0x0000000010000000-0x0000000010020000-memory.dmp	family_farfli
behavioral2/memory/1264-14-0x0000000010000000-0x0000000010020000-memory.dmp	family_farfli
behavioral2/memory/1264-15-0x0000000010000000-0x0000000010020000-memory.dmp	family_farfli
behavioral2/memory/1264-16-0x0000000010000000-0x0000000010020000-memory.dmp	family_farfli
behavioral2/memory/1264-17-0x0000000010000000-0x0000000010020000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral2/memory/1264-11-0x0000000010000000-0x0000000010020000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1264-14-0x0000000010000000-0x0000000010020000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1264-15-0x0000000010000000-0x0000000010020000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1264-16-0x0000000010000000-0x0000000010020000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1264-17-0x0000000010000000-0x0000000010020000-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
8	1264	rundll32.exe
10	1264	rundll32.exe
11	1264	rundll32.exe
12	1264	rundll32.exe
13	1264	rundll32.exe
15	1264	rundll32.exe
17	1264	rundll32.exe
18	1264	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4680	uihow.exe

Executes dropped EXE 1 IoCs

pid	Process
4680	uihow.exe

Loads dropped DLL 1 IoCs

pid	Process
1264	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:\\kjhgm\\ensxu.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)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	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)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	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)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	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
4656	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 1 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

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	2026-11-11_651ebc59bb8bab90d1ee45d05c8493e2_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	uihow.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
4656	cmd.exe
1520	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
1520	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1264	rundll32.exe
1264	rundll32.exe
1264	rundll32.exe
1264	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1264	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
548	2026-11-11_651ebc59bb8bab90d1ee45d05c8493e2_elex_wannacry.exe
4680	uihow.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 548 wrote to memory of 4656	548	2026-11-11_651ebc59bb8bab90d1ee45d05c8493e2_elex_wannacry.exe	88
PID 4656 wrote to memory of 1520	4656	cmd.exe	90
PID 4656 wrote to memory of 4680	4656	cmd.exe	92
PID 4680 wrote to memory of 1264	4680	uihow.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-11-11_651ebc59bb8bab90d1ee45d05c8493e2_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-11_651ebc59bb8bab90d1ee45d05c8493e2_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:548
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\uihow.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-11_651ebc59bb8bab90d1ee45d05c8493e2_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:4656
- - 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:1520
- - \??\c:\uihow.exe
    c:\uihow.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-11_651ebc59bb8bab90d1ee45d05c8493e2_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4680
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\kjhgm\ensxu.dll",GetWindowClass c:\uihow.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:1264

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

Loading Replay Monitor...

Downloads

ensxu.dll

Path \??\c:\kjhgm\ensxu.dll
Size 42KB
SHA256 c667caef3521735f1179dbb8e175cc34aeccb3c4ca99a33b6439f5434ad13297
MD5 fbb8994174071ab6aeee5a03ff4146c0
SHA1 53778e5cf624302ebc20bacab571402aa10bd991
SHA512 3f83a6556c5bed000e02a47f01dacb08a50517fd20670fcbb06f0a3d3bb7ea6d1d5a6ad0132f21450f900a10f5c994fd7ee20f3a2caea5da6ac09f67fa591a77
SSDEEP 768:repK1xR2eqF+ln9wUpfL8WjTkXaKf1YuwWvScERZk8mIYkJWAEvU:S82eqFi9Ppf4Wjl2bwEEuIYdAE
TLSH
T11113E173BFE82954D4EA4B3399E2C59EC232EC310682C26EB510926F3D70759DA53387
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

uihow.exe

Path \??\c:\uihow.exe
Size 123KB
SHA256 b75079adf87fa7944e5ff3a7fe477279b8c767fe17badda92ead465a1650794d
MD5 390b0bee26bf204ef2efc13c81a9f9b9
SHA1 eb715a819de832c82380807f904f4480da6ce0de
SHA512 2dd455656a534fb9258be5b409da1fd0972ebb2960adeefadac74a352033ceb87a8b97d8da40eb8505d51926467b5fac62a5cf5a04310d1d28160d51fcc09d39
SSDEEP 1536:N/14ZaKO/mHFqDMt8vdDMwgUmyZRTzeueKXOYDoAQLG7Y1iWtXoaW:Z14ZaKOytU//RXeu7OWoAQJpYaW
TLSH
T15CC33A0327F98195F0B63E73567A19204AB2BCD87D38CE1E5F54664E9970F30DA633A2
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/548-2-0x0000000000400000-0x000000000041C000-memory.dmp

Download

memory/548-0-0x0000000000400000-0x000000000041C000-memory.dmp

Download

memory/1264-14-0x0000000010000000-0x0000000010020000-memory.dmp

Download

memory/1264-9-0x0000000010000000-0x0000000010020000-memory.dmp

Download

memory/1264-10-0x0000000002F40000-0x0000000002F42000-memory.dmp

Download

memory/1264-11-0x0000000010000000-0x0000000010020000-memory.dmp

Download

memory/1264-12-0x0000000002F40000-0x0000000002F42000-memory.dmp

Download

memory/1264-15-0x0000000010000000-0x0000000010020000-memory.dmp

Download

memory/1264-16-0x0000000010000000-0x0000000010020000-memory.dmp

Download

memory/1264-17-0x0000000010000000-0x0000000010020000-memory.dmp

Download

memory/4680-6-0x0000000000400000-0x000000000041C000-memory.dmp

Download