farfli | 1321717d005805af4a472c69ef99eeaa4898cdb7ad0419e4cc734cdff356f443

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
04/08/2026, 15:10

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General

Target
2026-08-04_83b6d151671fcfd9835d0e86d3a6a155_elex_wannacry.exe
Size 125KB
Sample260804-ske8dscf98
SHA256 1321717d005805af4a472c69ef99eeaa4898cdb7ad0419e4cc734cdff356f443
MD5 83b6d151671fcfd9835d0e86d3a6a155
SHA1 c27a341767ae53987f0697396f1528069732dbdc
SHA512 31f3c70127b76537314fecd804c5f10e66994ea093fdf61055f31d842d0e1eadfdeafab9d2b78af8891f312adee76caa9504be2d7f20229d39b5909b78c11007
SSDEEP 3072:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0p:xl6XYeel6GGGVO
TLSH
T121C38C439BB589D9E0111CF4029B7B3593B698893B15A367C388DF0EE43DE81DB362D9
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 4 IoCs

resource	yara_rule
behavioral1/memory/5168-12-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral1/memory/5168-14-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral1/memory/5168-16-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral1/memory/5168-17-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral1/memory/5168-12-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5168-14-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5168-16-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5168-17-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 7 IoCs

resource	yara_rule
behavioral1/memory/3928-7-0x0000000000400000-0x0000000000417000-memory.dmp	UPX
behavioral1/files/0x000800000002464e-8.dat	UPX
behavioral1/memory/5168-10-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral1/memory/5168-12-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral1/memory/5168-14-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral1/memory/5168-16-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral1/memory/5168-17-0x0000000010000000-0x0000000010024000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
6	5168	rundll32.exe
20	5168	rundll32.exe
25	5168	rundll32.exe
26	5168	rundll32.exe
39	5168	rundll32.exe
44	5168	rundll32.exe
56	5168	rundll32.exe
70	5168	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000800000002464e-8.dat	acprotect

Deletes itself 1 IoCs

pid	Process
3928	kafdp.exe

Executes dropped EXE 1 IoCs

pid	Process
3928	kafdp.exe

Loads dropped DLL 1 IoCs

pid	Process
5168	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-1-5-21-3053180483-1881419501-3594244048-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\kcyes\\beuyd.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)	\??\q:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	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)	\??\o:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	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 6 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000800000002464e-8.dat	upx
behavioral1/memory/5168-10-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral1/memory/5168-12-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral1/memory/5168-14-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral1/memory/5168-16-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral1/memory/5168-17-0x0000000010000000-0x0000000010024000-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
5336	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-04_83b6d151671fcfd9835d0e86d3a6a155_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	kafdp.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
5336	cmd.exe
5544	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
5544	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5168	rundll32.exe
5168	rundll32.exe
5168	rundll32.exe
5168	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5168	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4760	2026-08-04_83b6d151671fcfd9835d0e86d3a6a155_elex_wannacry.exe
3928	kafdp.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4760 wrote to memory of 5336	4760	2026-08-04_83b6d151671fcfd9835d0e86d3a6a155_elex_wannacry.exe	86
PID 5336 wrote to memory of 5544	5336	cmd.exe	88
PID 5336 wrote to memory of 3928	5336	cmd.exe	89
PID 3928 wrote to memory of 5168	3928	kafdp.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-08-04_83b6d151671fcfd9835d0e86d3a6a155_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-04_83b6d151671fcfd9835d0e86d3a6a155_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4760
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\kafdp.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-04_83b6d151671fcfd9835d0e86d3a6a155_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:5336
- - 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:5544
- - \??\c:\kafdp.exe
    c:\kafdp.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-04_83b6d151671fcfd9835d0e86d3a6a155_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3928
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\kcyes\beuyd.dll",init c:\kafdp.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:5168

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

kafdp.exe

Path C:\kafdp.exe
Size 125KB
SHA256 e7567b6ed819398d118d651c248feba8874b81c460036a6b2e9e5045bff75280
MD5 162eabd9f41cd7b1e2d84c440bb28750
SHA1 1c0903b360248ca7c73fa53c8e9fbe0737def92b
SHA512 607be5a6e0362f32583d25d9b780962eb26e9d6afe75c117df442e0566352ede572c65707b101bd856f43125941f94a9f9240dbd13d2e21d9d7c1deb451f20f5
SSDEEP 3072:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0p9:xl6XYeel6GGGVOD
TLSH
T15AC38C439BB589D9E0111CF4039B7B3593B698893B15A367C388DF0EE42DE81DB362D9
MD5 SHA1 SHA512 SSDEEP TLSH

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beuyd.dll

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

Submit Download

memory/3928-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4760-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4760-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5168-10-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5168-12-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5168-14-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5168-16-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5168-17-0x0000000010000000-0x0000000010024000-memory.dmp

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