farfli | d9b6e684a0e5b9345bc50e616336fffe50ae807ea79e3386dc2dd85063ded16b

General

Target
2026-10-03_f83f60c347fdc4dfde88a18707b078f1_elex_strictor_wannacry.exe
Size 204KB
Sample261003-243bpszzds
SHA256 d9b6e684a0e5b9345bc50e616336fffe50ae807ea79e3386dc2dd85063ded16b
MD5 f83f60c347fdc4dfde88a18707b078f1
SHA1 4834569d8721a7115cb6c53167b3f90e55de067b
SHA512 2c2d4bae1e9b477792b18a95ff1fa472fd4566cbd265693142e5f0de397b3ad49aaaecfa4eb8b284eee03711751ac4b0251cd024e472b76299802f39b37465eb
SSDEEP 6144:ktu5eG4ZAk0NwPkrwvFe1RhooIW6eXRtdbBe:Wu5eG4fsEdtVKO
TLSH
T1B914E10396528817D95A8F32587A0F1A73696F690B1161F3F7CB6CED1B368E33237149
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/5456-8-0x0000000010000000-0x0000000010064000-memory.dmp	family_farfli
behavioral2/memory/5456-11-0x0000000010000000-0x0000000010064000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/5456-8-0x0000000010000000-0x0000000010064000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5456-11-0x0000000010000000-0x0000000010064000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
5340	yugwy.exe

Executes dropped EXE 2 IoCs

pid	Process
5340	yugwy.exe
5456	ytd.exe

Loads dropped DLL 1 IoCs

pid	Process
5456	ytd.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-1-5-21-2714045687-1127350534-2056456672-1000\Software\Microsoft\Windows\CurrentVersion\Run\DI = "c:\\Program Files\\peqte\\ytd.exe \"c:\\Program Files\\peqte\\ytdpi.dll\",DecodeImage"	ytd.exe

Enumerates connected drives 3 TTPs 24 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)	\??\y:	ytd.exe
File opened (read-only)	\??\a:	ytd.exe
File opened (read-only)	\??\k:	ytd.exe
File opened (read-only)	\??\l:	ytd.exe
File opened (read-only)	\??\r:	ytd.exe
File opened (read-only)	\??\t:	ytd.exe
File opened (read-only)	\??\u:	ytd.exe
File opened (read-only)	\??\d:	ytd.exe
File opened (read-only)	\??\g:	ytd.exe
File opened (read-only)	\??\m:	ytd.exe
File opened (read-only)	\??\n:	ytd.exe
File opened (read-only)	\??\o:	ytd.exe
File opened (read-only)	\??\v:	ytd.exe
File opened (read-only)	\??\z:	ytd.exe
File opened (read-only)	\??\b:	ytd.exe
File opened (read-only)	\??\h:	ytd.exe
File opened (read-only)	\??\q:	ytd.exe
File opened (read-only)	\??\s:	ytd.exe
File opened (read-only)	\??\w:	ytd.exe
File opened (read-only)	\??\x:	ytd.exe
	\??\f:\	ytd.exe
File opened (read-only)	\??\i:	ytd.exe
File opened (read-only)	\??\j:	ytd.exe
File opened (read-only)	\??\p:	ytd.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	ytd.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\peqte\ytdpi.dll	yugwy.exe
File created	\??\c:\Program Files\peqte\ytd.exe	yugwy.exe
File opened for modification	\??\c:\Program Files\peqte	yugwy.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
5044	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 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	ytd.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	ytd.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	2026-10-03_f83f60c347fdc4dfde88a18707b078f1_elex_strictor_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	yugwy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ytd.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
5044	cmd.exe
2312	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	ytd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ytd.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2312	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5456	ytd.exe
5456	ytd.exe
5456	ytd.exe
5456	ytd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5456	ytd.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3560	2026-10-03_f83f60c347fdc4dfde88a18707b078f1_elex_strictor_wannacry.exe
5340	yugwy.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3560 wrote to memory of 5044	3560	2026-10-03_f83f60c347fdc4dfde88a18707b078f1_elex_strictor_wannacry.exe	90
PID 5044 wrote to memory of 2312	5044	cmd.exe	92
PID 5044 wrote to memory of 5340	5044	cmd.exe	93
PID 5340 wrote to memory of 5456	5340	yugwy.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-10-03_f83f60c347fdc4dfde88a18707b078f1_elex_strictor_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-03_f83f60c347fdc4dfde88a18707b078f1_elex_strictor_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3560
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\yugwy.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-03_f83f60c347fdc4dfde88a18707b078f1_elex_strictor_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:5044
- - 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:2312
- - C:\Users\Admin\AppData\Local\Temp\yugwy.exe
    C:\Users\Admin\AppData\Local\Temp\\yugwy.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-03_f83f60c347fdc4dfde88a18707b078f1_elex_strictor_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:5340
  - - \??\c:\Program Files\peqte\ytd.exe
      "c:\Program Files\peqte\ytd.exe" "c:\Program Files\peqte\ytdpi.dll",DecodeImage C:\Users\Admin\AppData\Local\Temp\yugwy.exe
      4⤵
      Executes dropped EXE
      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:5456

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Indicator Removal

1

T1070

File Deletion

Modify Registry

Pre-OS Boot

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

ytd.exe

Path C:\Program Files\peqte\ytd.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

yugwy.exe

Path C:\Users\Admin\AppData\Local\Temp\yugwy.exe
Size 204KB
SHA256 ccb4d46104512b0acfc02339ca9b796c87ccb495c6c7ed0f7021b431fb7ed6eb
MD5 1fc42d9986a366e3f5d4fb53d74a631d
SHA1 602a7a31338a1152fdfb170721c25f6672797505
SHA512 21ff238ec73564864bc943471f55eb43d1f8468bd347752167b90024115b507608427217d834c76a07b4bd1af54f27250818f71867ea8a1bc9749c58a5d220b4
SSDEEP 6144:ktu5eG4ZAk0NwPkrwvFe1RhooIW6eXRtdbBl:Wu5eG4fsEdtVKV
TLSH
T13724E10396528827D95A8F32587A0F1A73696F690B1161F3F7CB6CED1B369F33136148
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ytdpi.dll

Path \??\c:\Program Files\peqte\ytdpi.dll
Size 164KB
SHA256 fb974805e8b976e758671746445c52d9250a10fb2c9731f498486c1f3e9459ab
MD5 64251237d07e79061c03faa1465aa634
SHA1 298c4b11e3cb47468063dba26fafbbfb121d5b36
SHA512 49ff461143b2c9a5f45bf596df4028bc12f51da1014f75af0356bfffb90cf78a2538f32e7e430e93457dcce152771687d89f48b33566b7ee53642585e149c33d
SSDEEP 3072:1wsMz025nKhnGgYhAAQKuNbySYZoNkrdQmSYgbJklqNJVXC7:1wsXcFhlWySYZo50gNkleVS7
TLSH
T1A4F302C1D298CFF3D80303B62856E87FF7705640D57A96139BC5AB6B282796A383D354
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/5456-7-0x0000000010000000-0x0000000010064000-memory.dmp

Download

memory/5456-8-0x0000000010000000-0x0000000010064000-memory.dmp

Download

memory/5456-11-0x0000000010000000-0x0000000010064000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads