farfli | 95ebd73410c5727bfe7b429d8bcb4904f846a62c5ed7d0fde938648164d5f2f8

Analysis

max time kernel
150s
max time network
137s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
09/11/2026, 11:17

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General

Target
2026-11-07_27fea5c50ff853b654dc7605967ab993_elex_wannacry.exe
Size 391KB
Sample261109-ndt1ray1ds
SHA256 95ebd73410c5727bfe7b429d8bcb4904f846a62c5ed7d0fde938648164d5f2f8
MD5 27fea5c50ff853b654dc7605967ab993
SHA1 2c3072d328d6f983bc864a4c49ce1df12bc5c2e7
SHA512 6d8dee39fe72f10c3b58ac1c92c3c67878e322867f1a59a4914712f7eef50cbdc77b1f72118437c08ba9028c0bde219d7f0e5fadd72351ec95a05eabfeccaed9
SSDEEP 6144:54yA9i7ZanCjRDWqCEdK40LUT4AxFa7abls3o:i7i1TjRDdZdVT4AxFauba3
TLSH
T143847AC057F9C205F2BE2F75DAB9B6F04A29BD55EE34E64B12843C1DB870A91D870326
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion discovery execution farfli persistence spyware stealer

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 2 IoCs

resource	yara_rule
behavioral2/memory/5524-10-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli
behavioral2/memory/5524-13-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/5524-10-0x0000000010000000-0x0000000010054000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5524-13-0x0000000010000000-0x0000000010054000-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
1	5524	rundll32.exe
2	5524	rundll32.exe
3	5524	rundll32.exe
4	5524	rundll32.exe
5	5524	rundll32.exe
6	5524	rundll32.exe
7	5524	rundll32.exe
8	5524	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4312	yyjdvlsw.exe

Executes dropped EXE 1 IoCs

pid	Process
4312	yyjdvlsw.exe

Loads dropped DLL 1 IoCs

pid	Process
5524	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-1-5-21-4057491610-3392471755-192832105-1000\Software\Microsoft\Windows\CurrentVersion\Run\HDTunePro = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\jrrbk\\mprcwmty.dll\",GetCpu"	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)	\??\j:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	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)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\z:	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

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\jrrbk	yyjdvlsw.exe
File created	\??\c:\Program Files\jrrbk\mprcwmty.dll	yyjdvlsw.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
4000	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 1 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yyjdvlsw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-11-07_27fea5c50ff853b654dc7605967ab993_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
4000	cmd.exe
4116	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
4116	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5524	rundll32.exe
5524	rundll32.exe
5524	rundll32.exe
5524	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5524	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
920	2026-11-07_27fea5c50ff853b654dc7605967ab993_elex_wannacry.exe
4312	yyjdvlsw.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 920 wrote to memory of 4000	920	2026-11-07_27fea5c50ff853b654dc7605967ab993_elex_wannacry.exe	90
PID 4000 wrote to memory of 4116	4000	cmd.exe	92
PID 4000 wrote to memory of 4312	4000	cmd.exe	93
PID 4312 wrote to memory of 5524	4312	yyjdvlsw.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-11-07_27fea5c50ff853b654dc7605967ab993_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-07_27fea5c50ff853b654dc7605967ab993_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:920
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\yyjdvlsw.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-07_27fea5c50ff853b654dc7605967ab993_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:4000
- - 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:4116
- - C:\Users\Admin\AppData\Local\Temp\yyjdvlsw.exe
    C:\Users\Admin\AppData\Local\Temp\\yyjdvlsw.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-07_27fea5c50ff853b654dc7605967ab993_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:4312
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\jrrbk\mprcwmty.dll",GetCpu C:\Users\Admin\AppData\Local\Temp\yyjdvlsw.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)
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5524

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

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Downloads

yyjdvlsw.exe

Path C:\Users\Admin\AppData\Local\Temp\yyjdvlsw.exe
Size 391KB
SHA256 4040cb4342f2294fec310e9fdf5d192a2094a24e1a4f54dc2eef8ec2ddff332c
MD5 b1c3b7dd0f20f47dae923c9ca14a768a
SHA1 e5a2502047c6349ef383b595c13b671c11ee63a7
SHA512 77e30ad8eb45b1aad54e67b8c621bbfc5739e6452d72bdb316396ad60819249da29c45444ea4063b92de22b58bc7e0b71585d357b1f23f98e33bbe60eaeb4f86
SSDEEP 6144:54yA9i7ZanCjRDWqCEdK40LUT4AxFa7abls3oX:i7i1TjRDdZdVT4AxFauba3I
TLSH
T10B847AC057F9C205F2BE2F75DAB9B6F04A29BD55EE34E64B12843C1DB870A91D870326
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

mprcwmty.dll

Path \??\c:\Program Files\jrrbk\mprcwmty.dll
Size 144KB
SHA256 bf5e21fce556ae7468e64da069171d43f1d45ea5824156e6ac68b384351d711b
MD5 dbc7d6704cc8f8ea02506d180f521e44
SHA1 2229b7641f0814288fec6e110e2ecfaa87a8c74a
SHA512 453dfddb7d28071716ff4271734f549337d419abb6a1404f4584644af49dd768683f248f7ef1597dba33026dab68357187a4ded520cb2635c6928545f08bc719
SSDEEP 3072:9FSwhKDdKtTZVdOEaoxVDYn10zGJP4eLhSco/fWoB7re9Z9Idl8v4qClISb:awhKDaZfFTxV8nXgesN/OpLcl8v4qwI2
TLSH
T141E302E2215AD2B3F4BE177D9C57050EF9BD14009BB98A5B57C0781A2C1AA36E83D373
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/920-0-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/920-2-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/4312-6-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/5524-9-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/5524-12-0x000000001004E000-0x000000001004F000-memory.dmp

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memory/5524-10-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/5524-13-0x0000000010000000-0x0000000010054000-memory.dmp

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