farfli | ddbfa7432e1ff55bf4f61fc826af33d07a0e37ba1e92311045d2606550c05d5b

Analysis

max time kernel
149s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
04/05/2026, 16:10

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-05-04_881ad15d84efa8e4dbc8aeef716c8628_elex_wannacry.exe
Size 103KB
Sample260504-tml96aft8t
SHA256 ddbfa7432e1ff55bf4f61fc826af33d07a0e37ba1e92311045d2606550c05d5b
MD5 881ad15d84efa8e4dbc8aeef716c8628
SHA1 d9bd1335d7a40c8bd4eeca0a4c28073288670547
SHA512 7bab22e02925cae6f7b559d4ac2589c93741315598d1b3dae2645048e1d02dcd8db20e603b056c63d5c7fa5d92ddccaef63629eb4419dbab39c59292c6339c77
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48:piAXaKDeKNnD36cb8tI8
TLSH
T150A39D42ABF086A1E0619CB506735B629E72FC2B193482677BD6B70EEC34F40EE25355
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery 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
behavioral2/memory/4800-11-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/4800-12-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral2/memory/4800-13-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/4800-15-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4800-11-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4800-13-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 15 IoCs

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

flow	pid	Process
1	4800	rundll32.exe
2	4800	rundll32.exe
3	4800	rundll32.exe
4	4800	rundll32.exe
5	4800	rundll32.exe
6	4800	rundll32.exe
7	4800	rundll32.exe
8	4800	rundll32.exe
9	4800	rundll32.exe
10	4800	rundll32.exe
13	4800	rundll32.exe
14	4800	rundll32.exe
15	4800	rundll32.exe
16	4800	rundll32.exe
17	4800	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4304	tfyqexe.exe

Executes dropped EXE 1 IoCs

pid	Process
4304	tfyqexe.exe

Loads dropped DLL 1 IoCs

pid	Process
4800	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-1-5-21-2122505878-652277452-2375749442-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\uxtzz\\kawddgtaf.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)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\k:	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

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	2026-05-04_881ad15d84efa8e4dbc8aeef716c8628_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	tfyqexe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
2728	cmd.exe
4192	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
4192	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4800	rundll32.exe
4800	rundll32.exe
4800	rundll32.exe
4800	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4800	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2620	2026-05-04_881ad15d84efa8e4dbc8aeef716c8628_elex_wannacry.exe
4304	tfyqexe.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2620 wrote to memory of 2728	2620	2026-05-04_881ad15d84efa8e4dbc8aeef716c8628_elex_wannacry.exe	80
PID 2728 wrote to memory of 4192	2728	cmd.exe	82
PID 2728 wrote to memory of 4304	2728	cmd.exe	83
PID 4304 wrote to memory of 4800	4304	tfyqexe.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-05-04_881ad15d84efa8e4dbc8aeef716c8628_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-04_881ad15d84efa8e4dbc8aeef716c8628_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2620
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\tfyqexe.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-04_881ad15d84efa8e4dbc8aeef716c8628_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2728
- - 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:4192
- - \??\c:\tfyqexe.exe
    c:\tfyqexe.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-04_881ad15d84efa8e4dbc8aeef716c8628_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4304
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\uxtzz\kawddgtaf.dll",GetWindowClass c:\tfyqexe.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:4800

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

tfyqexe.exe

Path \??\c:\tfyqexe.exe
Size 103KB
SHA256 6772f54d7544c40b896f1d04ebc3ce19a6be9d56aebc50fd653de51ef9f4cf25
MD5 92ecc4c4d6dc7f131323c39be1db8a73
SHA1 14c53e4ed27e1ea978b9cb72ab232c90c9a1bfd9
SHA512 0fb76a92baa6c7a802f1fab6de4c973e72f78f03441a403da29f62b5fc46383f50fe9f05d60fa1ed646716d6913f0725654873d8e9671714e2a36b9fda04d8ac
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48u:piAXaKDeKNnD36cb8tI8u
TLSH
T101A39D42ABF086A1E0619CB506735B629E72FC2B193482677BD6B70EEC34F40EE25355
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

kawddgtaf.dll

Path \??\c:\uxtzz\kawddgtaf.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/2620-0-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/2620-2-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/4304-6-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/4304-8-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/4800-11-0x0000000010000000-0x000000001002E000-memory.dmp

Download

memory/4800-12-0x0000000010001000-0x000000001001E000-memory.dmp

Download

memory/4800-13-0x0000000010000000-0x000000001002E000-memory.dmp

Download

memory/4800-14-0x00000000023B0000-0x0000000002414000-memory.dmp

Download

memory/4800-15-0x0000000010001000-0x000000001001E000-memory.dmp

Download

memory/4800-18-0x00000000023B0000-0x0000000002414000-memory.dmp

Download

memory/4800-23-0x00000000023B0000-0x0000000002414000-memory.dmp

Download

memory/4800-27-0x00000000023B0000-0x0000000002414000-memory.dmp

Download