farfli | 4f7c27beeeb134e7d5eb46c1f6dc460e957419399497b2aff77813d0d990d345

Analysis

max time kernel
148s
max time network
146s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
17/08/2026, 23:55

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General

Target
2026-08-17_c05489a27f68debee28954a172520abc_elex_wannacry.exe
Size 91KB
Sample260817-3ye5nasbnd
SHA256 4f7c27beeeb134e7d5eb46c1f6dc460e957419399497b2aff77813d0d990d345
MD5 c05489a27f68debee28954a172520abc
SHA1 4f05ebb9be12e298619e232e37366914a63d4c8a
SHA512 8b4a1937a4e1357b0fd86d115c91e082302d23509eaeb6a225a512a156c9dfbaf95114d61b4e7a124f27170c2e153a1c83e63ca9dac16cbba093538ac176faf3
SSDEEP 1536:SaK4RNx6nb4RoIw/vvBSxXsral6x2aE0zLve2yESXGTBcvt8UaKW40AEEo:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvC
TLSH
T11593AE47ABA50DD5E1204DF401AB7B36937654892F25A787D388DE0EA43EDC0DB362CE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer upx

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/5756-10-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/5756-12-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/5756-13-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/5756-14-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/5756-17-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral2/memory/5756-10-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5756-12-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5756-13-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5756-14-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5756-17-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 8 IoCs

resource	yara_rule
behavioral2/memory/1252-6-0x0000000000400000-0x0000000000417000-memory.dmp	UPX
behavioral2/files/0x00060000000187dc-7.dat	UPX
behavioral2/memory/5756-9-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/5756-10-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/5756-12-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/5756-13-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/5756-14-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/5756-17-0x0000000010000000-0x0000000010024000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
3	5756	rundll32.exe
10	5756	rundll32.exe
11	5756	rundll32.exe
12	5756	rundll32.exe
13	5756	rundll32.exe
14	5756	rundll32.exe
17	5756	rundll32.exe
18	5756	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x00060000000187dc-7.dat	acprotect

Deletes itself 1 IoCs

pid	Process
1252	uuxmqvxv.exe

Executes dropped EXE 1 IoCs

pid	Process
1252	uuxmqvxv.exe

Loads dropped DLL 1 IoCs

pid	Process
5756	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-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\lnszsnf\\kiidb.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)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	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)	\??\u:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	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

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x00060000000187dc-7.dat	upx
behavioral2/memory/5756-9-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/5756-10-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/5756-12-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/5756-13-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/5756-14-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/5756-17-0x0000000010000000-0x0000000010024000-memory.dmp	upx

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
4812	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	uuxmqvxv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-17_c05489a27f68debee28954a172520abc_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

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
4812	cmd.exe
3296	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
3296	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5756	rundll32.exe
5756	rundll32.exe
5756	rundll32.exe
5756	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5756	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3316	2026-08-17_c05489a27f68debee28954a172520abc_elex_wannacry.exe
1252	uuxmqvxv.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3316 wrote to memory of 4812	3316	2026-08-17_c05489a27f68debee28954a172520abc_elex_wannacry.exe	89
PID 4812 wrote to memory of 3296	4812	cmd.exe	91
PID 4812 wrote to memory of 1252	4812	cmd.exe	92
PID 1252 wrote to memory of 5756	1252	uuxmqvxv.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-17_c05489a27f68debee28954a172520abc_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-17_c05489a27f68debee28954a172520abc_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3316
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\uuxmqvxv.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-17_c05489a27f68debee28954a172520abc_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:4812
- - 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:3296
- - \??\c:\uuxmqvxv.exe
    c:\uuxmqvxv.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-17_c05489a27f68debee28954a172520abc_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1252
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\lnszsnf\kiidb.dll",init c:\uuxmqvxv.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:5756

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

kiidb.dll

Path \??\c:\lnszsnf\kiidb.dll
Size 46KB
SHA256 b6bc7902da0250f6ca920b35b222f6a0fe62102caf05d2a1722c4d3b225a0a9e
MD5 42fe886bcb6460f7c2a46e21ecac5da6
SHA1 7d9a1c9fe17121cf61444da965f29e974a95ede2
SHA512 3d1a7dc1d9ca8a4376302ba20df584ad59b98e0d3b18b06b22d7f5a455833ce124e412fc1922a3b704dcbafa31987cda3115c9a71dd6299683502cebae33567c
SSDEEP 768:P60NIyOvlPSGxZ00FBsMT0fdB5h3vU7ExCClpoduUglNgLoR/C:P6e4lP5rvz1Vd8H/C
TLSH
T10023F15733A8577BC9E621FA3263BE142B357019CB3A83545CB9B6572C21C8D927930F
MD5 SHA1 SHA512 SSDEEP TLSH

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uuxmqvxv.exe

Path \??\c:\uuxmqvxv.exe
Size 91KB
SHA256 8f5276a625503b590c26d5edbef9b8b1bfbc9a1d3c63fccaf1d8d218c5ab166a
MD5 460b5dfada7888416bd1d649bd471f63
SHA1 228b8435d079b128e963acf1d2758b0175f89777
SHA512 fd61ce481f6c3b5892816cce00ae1b454f95a9d93a2bbcf0fb78bb204d2c91627684227b34ee3a4c4fe9064acece2859b7fc7ef47f3e638fc870d4a063f266b1
SSDEEP 1536:SaK4RNx6nb4RoIw/vvBSxXsral6x2aE0zLve2yESXGTBcvt8UaKW40AEEok:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvT
TLSH
T15C93BE47ABA50DD5E1204DF401AB7B35937694892F25A787D388DE0EA43EDC0DB362CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1252-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3316-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3316-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5756-9-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5756-10-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5756-12-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5756-13-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5756-14-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5756-17-0x0000000010000000-0x0000000010024000-memory.dmp

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