farfli | d788f9d6c7d003acc72e2e92ee5f29b0c7bfef862664eddbf5f5c4304b722103

Analysis

max time kernel
148s
max time network
147s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
28/07/2026, 03:49

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-07-28_1bd8ff7f9c634ab37d5f83f20eb1fa21_elex_wannacry.exe
Size 98KB
Sample260728-edndjaxekf
SHA256 d788f9d6c7d003acc72e2e92ee5f29b0c7bfef862664eddbf5f5c4304b722103
MD5 1bd8ff7f9c634ab37d5f83f20eb1fa21
SHA1 ef6094fc800cbbb17bb9f71a26be5d56d8180f25
SHA512 306c6fa104a4e8a6e60ee140096b0237c5d4b44d994e35ff2abb8e3a38b32be8473be1b03d0a0f8d3ef9e7f15065ed9466cd0c10178f6be1984a385741c167d5
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmy6:uLRrO10TiJD9yjqrilyxOuP
TLSH
T14AA38C5C6962C59EE4054B7443479321A6A2AC59FA304F334380BB4EFF36E1BEDE91D8
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/4496-11-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/4496-13-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/4496-16-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4496-11-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4496-13-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4496-16-0x0000000010000000-0x0000000010023000-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
4	4496	rundll32.exe
5	4496	rundll32.exe
6	4496	rundll32.exe
12	4496	rundll32.exe
13	4496	rundll32.exe
14	4496	rundll32.exe
17	4496	rundll32.exe
18	4496	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2816	rffavku.exe

Executes dropped EXE 1 IoCs

pid	Process
2816	rffavku.exe

Loads dropped DLL 1 IoCs

pid	Process
4496	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:\\cofxc\\qiuza.dll\",QueryPluginInterface"	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	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)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\l:	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
4724	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	rffavku.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-28_1bd8ff7f9c634ab37d5f83f20eb1fa21_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
4724	cmd.exe
3024	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
3024	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4496	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3564	2026-07-28_1bd8ff7f9c634ab37d5f83f20eb1fa21_elex_wannacry.exe
2816	rffavku.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3564 wrote to memory of 4724	3564	2026-07-28_1bd8ff7f9c634ab37d5f83f20eb1fa21_elex_wannacry.exe	89
PID 4724 wrote to memory of 3024	4724	cmd.exe	91
PID 4724 wrote to memory of 2816	4724	cmd.exe	92
PID 2816 wrote to memory of 4496	2816	rffavku.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-28_1bd8ff7f9c634ab37d5f83f20eb1fa21_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-28_1bd8ff7f9c634ab37d5f83f20eb1fa21_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3564
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\rffavku.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-28_1bd8ff7f9c634ab37d5f83f20eb1fa21_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:4724
- - 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:3024
- - C:\Users\Admin\AppData\Local\Temp\rffavku.exe
    C:\Users\Admin\AppData\Local\Temp\\rffavku.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-28_1bd8ff7f9c634ab37d5f83f20eb1fa21_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2816
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\cofxc\qiuza.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\rffavku.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:4496

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

Replay Monitor

Loading Replay Monitor...

Downloads

rffavku.exe

Path C:\Users\Admin\AppData\Local\Temp\rffavku.exe
Size 98KB
SHA256 845cf55c33e1a2dbd3cc6aaf0b9b76367668ff60229b916a933449a36d02ad93
MD5 f031175c42170019e3b48e5913ff5c88
SHA1 13b8a3456f55e6737f8bfccf64f83507c36cadce
SHA512 9a3c4f06ea339300853d3ef77e19baee67f3d5dd0c7f82df147e35fb74d4a4e170a4f123732069ba00dcb19ce6baac6ecfd49972cc3cb9b2a815fa6df2e757df
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmy6G:uLRrO10TiJD9yjqrilyxOuPx
TLSH
T1B3A38C5C6962C59EE4054B7443479321A6A2AC59FA304F334380BB4EFF36E1BEDE91D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

qiuza.dll

Path \??\c:\cofxc\qiuza.dll
Size 44KB
SHA256 9111c1eb1f0b59dcd49cfd5a0abc0ba100ac59a3bcae8623ff091dfdc46fed3c
MD5 0f12a7d509b2c9bb9b4cd6d8a0325e86
SHA1 f5fb59ad4f0633d115b06f35a2dc161dc4367157
SHA512 e3c84a643ff0a2627daba8a056221985a472aaf07bade61b3e9459db4bfc8792c1347606911e3fcc01581508004b18b5435bcccd5e7617cc6d091f37a5f42e7f
SSDEEP 768:DICzePjle2367kjhrXLdCuYMW8QVnwrLDGe/brbtJyOTuXfADVjeJ2i/MVJWAE:DDePjA23Ukjh37YMonwrvGybrbbRCf4E
TLSH
T1FD23F1A7B94E8D4FC0AE41F7078FC8D422B5589A97A7CB4626008F216CC4FB07E52376
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2816-6-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/3564-0-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/3564-2-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/4496-9-0x0000000010000000-0x0000000010023000-memory.dmp

Download

memory/4496-10-0x00000000028B0000-0x00000000028B2000-memory.dmp

Download

memory/4496-11-0x0000000010000000-0x0000000010023000-memory.dmp

Download

memory/4496-13-0x0000000010000000-0x0000000010023000-memory.dmp

Download

memory/4496-16-0x0000000010000000-0x0000000010023000-memory.dmp

Download