farfli | 0d37239e0affda28e110c1f5a22949ffa0abb2c64975c8946852a2c04947e1ab

Analysis

max time kernel
150s
max time network
146s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
24/08/2026, 16:03

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General

Target
2026-08-23_1e43d439226479603eca83b6c12d559d_elex_wannacry.exe
Size 106KB
Sample260824-thnmeszhkd
SHA256 0d37239e0affda28e110c1f5a22949ffa0abb2c64975c8946852a2c04947e1ab
MD5 1e43d439226479603eca83b6c12d559d
SHA1 0b4622c8430a1debcd2671496039f3a9f54cf53d
SHA512 93c21404ab1c5a725568b43a00a34bd6c793844bab0e3d65d025a7158a5a57f158ebf6d8c7a7bbab103b703cdb67e28e0b0bf5d8f9b7e9495aa8a96e855783a8
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX47dqQ:piAXaKDeKNnD36cb8tI7oQ
TLSH
T138B3AE42ABF087A1E06159B506735B629EB3FC6B2934822777D6B74EEC30F00EE25355
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
behavioral2/memory/5888-9-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/5888-10-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral2/memory/5888-11-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/5888-12-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/5888-9-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5888-11-0x0000000010000000-0x000000001002E000-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	5888	rundll32.exe
6	5888	rundll32.exe
7	5888	rundll32.exe
12	5888	rundll32.exe
13	5888	rundll32.exe
14	5888	rundll32.exe
16	5888	rundll32.exe
18	5888	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4144	qonkw.exe

Executes dropped EXE 1 IoCs

pid	Process
4144	qonkw.exe

Loads dropped DLL 1 IoCs

pid	Process
5888	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:\\vrzyc\\dfftv.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)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\a:	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
4196	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	2026-08-23_1e43d439226479603eca83b6c12d559d_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	qonkw.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
4196	cmd.exe
3372	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
3372	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5888	rundll32.exe
5888	rundll32.exe
5888	rundll32.exe
5888	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5888	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5840	2026-08-23_1e43d439226479603eca83b6c12d559d_elex_wannacry.exe
4144	qonkw.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5840 wrote to memory of 4196	5840	2026-08-23_1e43d439226479603eca83b6c12d559d_elex_wannacry.exe	89
PID 4196 wrote to memory of 3372	4196	cmd.exe	91
PID 4196 wrote to memory of 4144	4196	cmd.exe	92
PID 4144 wrote to memory of 5888	4144	qonkw.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-23_1e43d439226479603eca83b6c12d559d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-23_1e43d439226479603eca83b6c12d559d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5840
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\qonkw.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-23_1e43d439226479603eca83b6c12d559d_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:4196
- - 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:3372
- - \??\c:\qonkw.exe
    c:\qonkw.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-23_1e43d439226479603eca83b6c12d559d_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4144
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\vrzyc\dfftv.dll",GetWindowClass c:\qonkw.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:5888

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

qonkw.exe

Path \??\c:\qonkw.exe
Size 106KB
SHA256 9d0fa6f76c91bf264e99087c2c0c4280ad0739538861a721607297e09c7f943b
MD5 815bb6b3ee821ed097bc6303117f6bb9
SHA1 108f2b35b3fb7e3b3b065a9ac03d4d3454758e22
SHA512 f78b981ffe8ac991d5b9ad7784d3de0ebe22f2e1702c888b2d6d9e8773f5b7de30c6f92f28646bafe6043229db4ff3a89c61840611412aefc0860bd4b0a98db2
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX47dqQ:piAXaKDeKNnD36cb8tI7oQ
TLSH
T13EB39E42ABF0C7A1E06159B506735B629EB2FC6B2934822777D6B74FEC30F00EA25355
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

dfftv.dll

Path \??\c:\vrzyc\dfftv.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/4144-6-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/5840-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/5840-2-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/5888-9-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/5888-10-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/5888-11-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/5888-12-0x0000000010001000-0x000000001001E000-memory.dmp

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