farfli | 6b480d3f0cf4d4015569bf3ee462f6086f0a1da29c9b969b5b5f2bc00ed79eb4

Analysis

max time kernel
150s
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
06/05/2026, 16:07

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General

Target
2026-05-06_ea820c31ed5fc187f972c6104200b1a1_elex_wannacry.exe
Size 102KB
Sample260506-tkpmhad18t
SHA256 6b480d3f0cf4d4015569bf3ee462f6086f0a1da29c9b969b5b5f2bc00ed79eb4
MD5 ea820c31ed5fc187f972c6104200b1a1
SHA1 59ea2c06b28f426a29fcd2a8fe4df474c7dd43ce
SHA512 e616e04e90c8b1315d2c63b46af8ef02a15bc86753ee878140ede016dbf772f6e5922fe21cfe337c3ab584430ee640e151248390751a6f98c443ee9e36c94f88
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48:piAXaKDeKNnD36cb8tI8
TLSH
T1CBA39D42ABF08661E06199B506735B629EB3FC2B193483677BD6B70EAC34F40EE21355
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/3128-11-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral2/memory/3128-10-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/3128-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/3128-13-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/3128-10-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3128-12-0x0000000010000000-0x000000001002E000-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	3128	rundll32.exe
2	3128	rundll32.exe
3	3128	rundll32.exe
4	3128	rundll32.exe
5	3128	rundll32.exe
6	3128	rundll32.exe
7	3128	rundll32.exe
8	3128	rundll32.exe
9	3128	rundll32.exe
10	3128	rundll32.exe
13	3128	rundll32.exe
14	3128	rundll32.exe
15	3128	rundll32.exe
16	3128	rundll32.exe
17	3128	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3076	yvkjf.exe

Executes dropped EXE 1 IoCs

pid	Process
3076	yvkjf.exe

Loads dropped DLL 1 IoCs

pid	Process
3128	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-1-5-21-650218026-1419908266-2856590055-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\quhdm\\djswe.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)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	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)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\e:	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)	\??\q:	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)	\??\g:	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	yvkjf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-06_ea820c31ed5fc187f972c6104200b1a1_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
5396	PING.EXE
5024	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 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
5396	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3128	rundll32.exe
3128	rundll32.exe
3128	rundll32.exe
3128	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3128	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4928	2026-05-06_ea820c31ed5fc187f972c6104200b1a1_elex_wannacry.exe
3076	yvkjf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4928 wrote to memory of 5024	4928	2026-05-06_ea820c31ed5fc187f972c6104200b1a1_elex_wannacry.exe	79
PID 5024 wrote to memory of 5396	5024	cmd.exe	81
PID 5024 wrote to memory of 3076	5024	cmd.exe	82
PID 3076 wrote to memory of 3128	3076	yvkjf.exe	83

C:\Users\Admin\AppData\Local\Temp\2026-05-06_ea820c31ed5fc187f972c6104200b1a1_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-06_ea820c31ed5fc187f972c6104200b1a1_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4928
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\yvkjf.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-06_ea820c31ed5fc187f972c6104200b1a1_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5024
- - 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:5396
- - \??\c:\yvkjf.exe
    c:\yvkjf.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-06_ea820c31ed5fc187f972c6104200b1a1_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3076
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\quhdm\djswe.dll",GetWindowClass c:\yvkjf.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:3128

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

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Downloads

yvkjf.exe

Path C:\yvkjf.exe
Size 102KB
SHA256 9c22bbb70467342fce97a2d35a5a472183cb47a10e9681cc0e4c3307a7eeffdf
MD5 c3b9f088211ea152aa696716219643c0
SHA1 241dca8c8e4115443ef90c727c08c3771c9c99e2
SHA512 7615e49db166dbf62d29d0615ba5ff5b4a4b4e688345a3d6a49f72e1e33587c2ef1a67bcae7e4b60519d91ca035af772e12ca6e79eed37a5de9e2a3ddf47513d
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48u:piAXaKDeKNnD36cb8tI8u
TLSH
T149A39E42ABF08761E0659DB506735B629EB2FC2B193483277BD6B70EAC34F40EE21355
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

djswe.dll

Path \??\c:\quhdm\djswe.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

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memory/3076-7-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/3128-11-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/3128-10-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/3128-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/3128-13-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4928-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4928-2-0x0000000000400000-0x000000000041A000-memory.dmp

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