farfli | d54fa798973599b6415188adc93a321aa949753f28339dbf355341a711a62f1b

Analysis

max time kernel
149s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
09/08/2026, 06:32

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General

Target
2026-08-09_b4a6908fbcb97f89eec6131c0e35c03c_elex_wannacry.exe
Size 109KB
Sample260809-har44asdnc
SHA256 d54fa798973599b6415188adc93a321aa949753f28339dbf355341a711a62f1b
MD5 b4a6908fbcb97f89eec6131c0e35c03c
SHA1 ee1646562044c5f25030929b0c0d6178d2b342c6
SHA512 fbc3d3e8ab1c409fc23327c5ae3068acc28e76e68827261a792572a5729c254ea78125f5889787b5a3f2c8ff93f30f358d00236fb4596cb8f1eee48e692320de
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4:piAXaKDeKNnD36cb8tI
TLSH
T15DB39D02ABF0C7A5E0665CB506775B619EB2FC6A2924832777D6B70EEC30F00EE25355
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 4 IoCs

resource	yara_rule
behavioral1/memory/2688-10-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/2688-11-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral1/memory/2688-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/2688-13-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/2688-10-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2688-12-0x0000000010000000-0x000000001002E000-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
5	2688	rundll32.exe
6	2688	rundll32.exe
7	2688	rundll32.exe
20	2688	rundll32.exe
23	2688	rundll32.exe
34	2688	rundll32.exe
47	2688	rundll32.exe
57	2688	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4260	pykki.exe

Executes dropped EXE 1 IoCs

pid	Process
4260	pykki.exe

Loads dropped DLL 1 IoCs

pid	Process
2688	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-1-5-21-204488895-2999877624-296153668-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\agxwe\\xmfqs.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)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	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)	\??\a:	rundll32.exe
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)	\??\r:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\v:	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
4536	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	pykki.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-09_b4a6908fbcb97f89eec6131c0e35c03c_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
4536	cmd.exe
1184	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
1184	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2688	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1756	2026-08-09_b4a6908fbcb97f89eec6131c0e35c03c_elex_wannacry.exe
4260	pykki.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1756 wrote to memory of 4536	1756	2026-08-09_b4a6908fbcb97f89eec6131c0e35c03c_elex_wannacry.exe	86
PID 4536 wrote to memory of 1184	4536	cmd.exe	88
PID 4536 wrote to memory of 4260	4536	cmd.exe	89
PID 4260 wrote to memory of 2688	4260	pykki.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-08-09_b4a6908fbcb97f89eec6131c0e35c03c_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_b4a6908fbcb97f89eec6131c0e35c03c_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1756
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\pykki.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_b4a6908fbcb97f89eec6131c0e35c03c_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:4536
- - 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:1184
- - \??\c:\pykki.exe
    c:\pykki.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_b4a6908fbcb97f89eec6131c0e35c03c_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4260
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\agxwe\xmfqs.dll",GetWindowClass c:\pykki.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:2688

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

pykki.exe

Path C:\pykki.exe
Size 109KB
SHA256 5bf6a77170ac5160631bde9d3bfc08377345bbb3ba118d5a198b821b295192b4
MD5 8674b0cb8c3c506532abc8a2d96b889e
SHA1 bf81785512ee4789c2f32b72e0f015141000bdc2
SHA512 cf5b75171b1809f043a7ceacaba71cc5275922c658dc6df8f5ae532151afedd925fb1f80937ae2cc5ef443511874774d90e54cdfa17887208ee7097b03aae9f0
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4o:piAXaKDeKNnD36cb8tIo
TLSH
T19AB39E02ABF0C7A5E0665CB506775B619EB2FC6A2924832777D6B70FEC30F04EA25354
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

xmfqs.dll

Path \??\c:\agxwe\xmfqs.dll
Size 46KB
SHA256 f57f9e54f4774c2b944fb070ae0c2a02cbb4b7686ab3207544c3ccaff0ff3dd9
MD5 a3fd41430ddcaa55fde840788925406a
SHA1 dbdd87f5c1bbf6a6f44c2e2c4744675d5e4e75c2
SHA512 23109572cfc9a282ea3ec84d93bfe02303d27f365ad2d9f47f6234f91da14c64f80133cc5e49746dfcb65d2454b7e7c13eff59ba4bbc18e09d2fb1c630ba59c9
SSDEEP 768:2sUfnvxs6iLlhpfFPtnQf7kifD/v7yb9Bh7Cb0VQJojZC/xjTk:2sJT1qf4W/vub9nnV1jZC/xE
TLSH
T19D2302C8A6F08EF3D2F90B7980E046DCDCFDB939877381150566008E7C71057FA446AA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1756-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/1756-2-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/2688-10-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/2688-11-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/2688-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/2688-13-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4260-7-0x0000000000400000-0x000000000041A000-memory.dmp

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