farfli | a9d8c103feffdc13e217ec06faad1db632ade39a5b9ed13567880ba218faf3b7

General

Target
2026-07-20_b0a59b430cbccc821c2d4996ba783f9f_elex_wannacry.exe
Size 96KB
Sample260720-rldwaaey2t
SHA256 a9d8c103feffdc13e217ec06faad1db632ade39a5b9ed13567880ba218faf3b7
MD5 b0a59b430cbccc821c2d4996ba783f9f
SHA1 ee65291fc916fbffd4e0df1fe444d5146cd0e09a
SHA512 0c9c9c7dac56f7913891a42e918039f65ba885af32a6b1285f535f1faaf8f791259ec5df9233514fa414564fc06521704622359414dfc1310051e0a75f1339bc
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo6o:el69Ml0TE1
TLSH
T153A3AE17ABA589C9F1216C30566E373087BFA85D3F1457679348EE4EE437D80EC3628A
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 1 IoCs

resource	yara_rule
behavioral2/memory/3224-10-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 1 IoCs

resource	yara_rule
behavioral2/memory/3224-10-0x0000000010000000-0x0000000010032000-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
7	3224	rundll32.exe
8	3224	rundll32.exe
9	3224	rundll32.exe
11	3224	rundll32.exe
12	3224	rundll32.exe
15	3224	rundll32.exe
16	3224	rundll32.exe
17	3224	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0005000000016cc6-7.dat	acprotect

Deletes itself 1 IoCs

pid	Process
628	glfduaa.exe

Executes dropped EXE 1 IoCs

pid	Process
628	glfduaa.exe

Loads dropped DLL 1 IoCs

pid	Process
3224	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-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\giyjwh\\zyuye.dll\",DoVirusScan"	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)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	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)	\??\r:	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)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	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
2820	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	glfduaa.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-20_b0a59b430cbccc821c2d4996ba783f9f_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
5476	PING.EXE
2820	cmd.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
5476	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3224	rundll32.exe
3224	rundll32.exe
3224	rundll32.exe
3224	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3224	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1188	2026-07-20_b0a59b430cbccc821c2d4996ba783f9f_elex_wannacry.exe
628	glfduaa.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1188 wrote to memory of 2820	1188	2026-07-20_b0a59b430cbccc821c2d4996ba783f9f_elex_wannacry.exe	89
PID 2820 wrote to memory of 5476	2820	cmd.exe	91
PID 2820 wrote to memory of 628	2820	cmd.exe	92
PID 628 wrote to memory of 3224	628	glfduaa.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-20_b0a59b430cbccc821c2d4996ba783f9f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-20_b0a59b430cbccc821c2d4996ba783f9f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1188
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\glfduaa.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-20_b0a59b430cbccc821c2d4996ba783f9f_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:2820
- - 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:5476
- - \??\c:\glfduaa.exe
    c:\glfduaa.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-20_b0a59b430cbccc821c2d4996ba783f9f_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:628
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\giyjwh\zyuye.dll",DoVirusScan c:\glfduaa.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:3224

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

zyuye.dll

Path \??\c:\giyjwh\zyuye.dll
Size 50KB
SHA256 b2d21c40c5bfc0f7695945946fa1cdd4eaf2f66a8391ddde6307c5f765fbf525
MD5 cbfc06794d16ace6adf42210183fc1b9
SHA1 74fc68a2af225b0aca954b3684940747511013c5
SHA512 181dbe8b63e28a81cb8e0b7240df8745da350e1ab433b157b8b4fd36aa10f0782e807c09563bcffe37cfe64aa1b514b2cc1f179fbcba422d96867179d88e13c9
SSDEEP 768:Z+arYIR3u5v4bGwCl56LNQQe5JBtGf1oTYtx/qQvorLOpqPJ/UP2Gy+OIudD05:ZPrG57TzDxJS6Etx/Zv2OwSy+OIOD05
TLSH
T15733F1ACE2F064F5D0AF6B345952225CF5C26F238D3190DB4A8214BF3C32A5B5B5E721
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

glfduaa.exe

Path \??\c:\glfduaa.exe
Size 96KB
SHA256 77f01d7dcd361407de41eaad018f410bd2e3c3203e052ea22e1beb680743a0b1
MD5 5ed760898793e5ef3d23e0bc727420ed
SHA1 7ae60d9082d3e5a4ead0e4e15606950d86490e18
SHA512 957f6f1299bfde39c16cc8431653bf2f021c2f1bdc10be1f06f87c8cbba4ca276b2dd56a254f18f9524265f08d0f186eb7abe11986b6f20c8ae296a9577c8268
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo6t:el69Ml0TEI
TLSH
T10BA3AE17ABA589C9F1217C30566E373087BE985D3F1457679348EE4EE833D80EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/628-6-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/1188-0-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/1188-2-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/3224-9-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/3224-10-0x0000000010000000-0x0000000010032000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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