farfli | 23bcf61cd8cc970fdf9dd33424c96cad0d1586c77d94d49277fc4a4ade481c7b

Analysis

max time kernel
149s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
04/11/2026, 00:56

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-11-03_ff1806110349801165b26b7dcfe13a7e_elex_wannacry.exe
Size 403KB
Sample261104-basmas1y2k
SHA256 23bcf61cd8cc970fdf9dd33424c96cad0d1586c77d94d49277fc4a4ade481c7b
MD5 ff1806110349801165b26b7dcfe13a7e
SHA1 25e4a8e1f90e47ef4526d00a196c43a8420bf1a5
SHA512 39a9c5d426eabd65e2b2a93580ba9fdae856fffc636320d39f0ebe10cf70daa262f723557fadb6110ed3b305b44cf689059e19f9323a1bf9ac4114b3ad108463
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9C:nHBTwjBqbYkvqZMcV7i32iec
TLSH
T19D94CF2332C1C8A7C1D17373FEE2B672E3F5C2A85D356A7753EA015D1E2B44C92162A9
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion 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 5 IoCs

resource	yara_rule
behavioral1/memory/4660-18-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral1/memory/4660-16-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral1/memory/4660-21-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral1/memory/4660-23-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral1/memory/4660-26-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral1/memory/4660-18-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4660-16-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4660-21-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4660-23-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4660-26-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4520	cfnnd.exe

Executes dropped EXE 2 IoCs

pid	Process
4520	cfnnd.exe
4660	mwqd.exe

Loads dropped DLL 1 IoCs

pid	Process
4660	mwqd.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-1-5-21-895009113-1202185046-1686627690-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\DESIME = "c:\\Program Files\\ypkfl\\mwqd.exe \"c:\\Program Files\\ypkfl\\mwqdv.dll\",DoPrivacy"	mwqd.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)	\??\s:	mwqd.exe
File opened (read-only)	\??\e:	mwqd.exe
File opened (read-only)	\??\i:	mwqd.exe
File opened (read-only)	\??\o:	mwqd.exe
File opened (read-only)	\??\p:	mwqd.exe
File opened (read-only)	\??\u:	mwqd.exe
File opened (read-only)	\??\w:	mwqd.exe
File opened (read-only)	\??\x:	mwqd.exe
File opened (read-only)	\??\z:	mwqd.exe
File opened (read-only)	\??\b:	mwqd.exe
File opened (read-only)	\??\h:	mwqd.exe
File opened (read-only)	\??\k:	mwqd.exe
File opened (read-only)	\??\m:	mwqd.exe
File opened (read-only)	\??\n:	mwqd.exe
File opened (read-only)	\??\t:	mwqd.exe
File opened (read-only)	\??\v:	mwqd.exe
File opened (read-only)	\??\y:	mwqd.exe
File opened (read-only)	\??\a:	mwqd.exe
File opened (read-only)	\??\g:	mwqd.exe
File opened (read-only)	\??\j:	mwqd.exe
File opened (read-only)	\??\l:	mwqd.exe
File opened (read-only)	\??\q:	mwqd.exe
File opened (read-only)	\??\r:	mwqd.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	mwqd.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/4440-0-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral1/memory/4440-2-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral1/files/0x000500000002325d-4.dat	upx
behavioral1/memory/4520-6-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral1/memory/4520-14-0x0000000000400000-0x0000000000499000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	\??\c:\Program Files\ypkfl\mwqdv.dll	cfnnd.exe
File created	\??\c:\Program Files\ypkfl\mwqd.exe	cfnnd.exe
File opened for modification	\??\c:\Program Files\ypkfl\mwqd.exe	cfnnd.exe
File opened for modification	\??\c:\Program Files\ypkfl	cfnnd.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
4360	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	2026-11-03_ff1806110349801165b26b7dcfe13a7e_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	cfnnd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mwqd.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
4360	cmd.exe
4348	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	mwqd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	mwqd.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4348	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4660	mwqd.exe
4660	mwqd.exe
4660	mwqd.exe
4660	mwqd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4660	mwqd.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4440	2026-11-03_ff1806110349801165b26b7dcfe13a7e_elex_wannacry.exe
4520	cfnnd.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4440 wrote to memory of 4360	4440	2026-11-03_ff1806110349801165b26b7dcfe13a7e_elex_wannacry.exe	85
PID 4360 wrote to memory of 4348	4360	cmd.exe	87
PID 4360 wrote to memory of 4520	4360	cmd.exe	88
PID 4520 wrote to memory of 4660	4520	cfnnd.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-11-03_ff1806110349801165b26b7dcfe13a7e_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-03_ff1806110349801165b26b7dcfe13a7e_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4440
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\cfnnd.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-03_ff1806110349801165b26b7dcfe13a7e_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:4360
- - 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:4348
- - C:\Users\Admin\AppData\Local\Temp\cfnnd.exe
    C:\Users\Admin\AppData\Local\Temp\\cfnnd.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-03_ff1806110349801165b26b7dcfe13a7e_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4520
  - - \??\c:\Program Files\ypkfl\mwqd.exe
      "c:\Program Files\ypkfl\mwqd.exe" "c:\Program Files\ypkfl\mwqdv.dll",DoPrivacy C:\Users\Admin\AppData\Local\Temp\cfnnd.exe
      4⤵
      Executes dropped EXE
      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:4660

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

Indicator Removal

T1070

File Deletion

T1070.004

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

mwqd.exe

Path C:\Program Files\ypkfl\mwqd.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
TLSH
T127532AC2FA00C171D4A7563019778F1A5766AC13DB728ACB94B0B4A41EB3291AD3E5FF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

cfnnd.exe

Path C:\Users\Admin\AppData\Local\Temp\cfnnd.exe
Size 404KB
SHA256 9750286b1bfcdd3d4c2feee6957837d255fcbc86b6579c33c6688058641c3e34
MD5 064ebe758f9ed3ba78bb2102705a0cb3
SHA1 53915d2b98c3ec838e02e5f15d60a51f0e8dce44
SHA512 5158a20845a93efdbfc1c5a30bceac82369af58e21476776684d6c83b94bbb2eb372c6cb8409ca0b02a2868fc552a98d325ec860a1952db3a12fdecccb730f52
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9D:nHBTwjBqbYkvqZMcV7i32iex
TLSH
T11694CF2332C1C8A7C1D17373FEE2B672E3F5C2A85D356A7753EA015D1E2B44C92162A9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

mwqdv.dll

Path \??\c:\Program Files\ypkfl\mwqdv.dll
Size 219KB
SHA256 f73a1a9b7eddd318c12a16b6e5c29886b567d063147a0e87e7ee31757dd76fc9
MD5 a9ce8017d739370a73deb4e627916dce
SHA1 15fdb46891cddb4f3e8d587e92977cabe8a81d82
SHA512 c7cb13f56844b470a3b42cdd2bc0ff59da5f6af20176bf115b22ff9bc2d36c9b317e676d0c0feee3e5d65b4b3d96a4882f472419b1399c9265476a5d95198060
SSDEEP 6144:XxDink0qeQKc/A8MNfnX2p2KL5aI3iMKC:XAk9uNfnX2p2Q5aIx1
TLSH
T1992413C4FF52EFCEE8610AF03B4FA2A5DF705C6BC48202C114EA58535A65EA3F695B05
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4440-2-0x0000000000400000-0x0000000000499000-memory.dmp

Download

memory/4440-0-0x0000000000400000-0x0000000000499000-memory.dmp

Download

memory/4520-14-0x0000000000400000-0x0000000000499000-memory.dmp

Download

memory/4520-6-0x0000000000400000-0x0000000000499000-memory.dmp

Download

memory/4660-15-0x0000000010000000-0x000000001005A000-memory.dmp

Download

memory/4660-20-0x0000000000A70000-0x0000000000A71000-memory.dmp

Download

memory/4660-18-0x0000000010000000-0x000000001005A000-memory.dmp

Download

memory/4660-16-0x0000000010000000-0x000000001005A000-memory.dmp

Download

memory/4660-21-0x0000000010000000-0x000000001005A000-memory.dmp

Download

memory/4660-23-0x0000000010000000-0x000000001005A000-memory.dmp

Download

memory/4660-26-0x0000000010000000-0x000000001005A000-memory.dmp

Download