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
behavioral1/memory/2152-12-0x0000000010000000-0x0000000010064000-memory.dmp	family_farfli
behavioral1/memory/2152-15-0x0000000010000000-0x0000000010064000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/2152-12-0x0000000010000000-0x0000000010064000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2152-15-0x0000000010000000-0x0000000010064000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
1692	xypyykjma.exe

Executes dropped EXE 2 IoCs

pid	Process
1692	xypyykjma.exe
2152	znzf.exe

Loads dropped DLL 1 IoCs

pid	Process
2152	znzf.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-1-5-21-2091445952-3649787497-104050984-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\DI = "c:\\Program Files\\wciwinf\\znzf.exe \"c:\\Program Files\\wciwinf\\znzfr.dll\",DecodeImage"	znzf.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)	\??\g:	znzf.exe
File opened (read-only)	\??\h:	znzf.exe
File opened (read-only)	\??\i:	znzf.exe
File opened (read-only)	\??\l:	znzf.exe
File opened (read-only)	\??\m:	znzf.exe
File opened (read-only)	\??\o:	znzf.exe
File opened (read-only)	\??\u:	znzf.exe
File opened (read-only)	\??\v:	znzf.exe
File opened (read-only)	\??\a:	znzf.exe
File opened (read-only)	\??\r:	znzf.exe
File opened (read-only)	\??\s:	znzf.exe
File opened (read-only)	\??\w:	znzf.exe
File opened (read-only)	\??\x:	znzf.exe
File opened (read-only)	\??\z:	znzf.exe
File opened (read-only)	\??\e:	znzf.exe
File opened (read-only)	\??\j:	znzf.exe
File opened (read-only)	\??\k:	znzf.exe
File opened (read-only)	\??\q:	znzf.exe
File opened (read-only)	\??\y:	znzf.exe
File opened (read-only)	\??\b:	znzf.exe
	\??\f:\	znzf.exe
File opened (read-only)	\??\n:	znzf.exe
File opened (read-only)	\??\p:	znzf.exe
File opened (read-only)	\??\t:	znzf.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	znzf.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	\??\c:\Program Files\wciwinf\znzfr.dll	xypyykjma.exe
File created	\??\c:\Program Files\wciwinf\znzf.exe	xypyykjma.exe
File opened for modification	\??\c:\Program Files\wciwinf\znzf.exe	xypyykjma.exe
File opened for modification	\??\c:\Program Files\wciwinf	xypyykjma.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
5548	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	znzf.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	znzf.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	xypyykjma.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	znzf.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
5548	cmd.exe
552	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	znzf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	znzf.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
552	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2152	znzf.exe
2152	znzf.exe
2152	znzf.exe
2152	znzf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2152	znzf.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5044	2026-10-03_f83f60c347fdc4dfde88a18707b078f1_elex_strictor_wannacry.exe
1692	xypyykjma.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5044 wrote to memory of 5548	5044	2026-10-03_f83f60c347fdc4dfde88a18707b078f1_elex_strictor_wannacry.exe	87
PID 5548 wrote to memory of 552	5548	cmd.exe	90
PID 5548 wrote to memory of 1692	5548	cmd.exe	92
PID 1692 wrote to memory of 2152	1692	xypyykjma.exe	93

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:5044
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\xypyykjma.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:5548
- - 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:552
- - C:\Users\Admin\AppData\Local\Temp\xypyykjma.exe
    C:\Users\Admin\AppData\Local\Temp\\xypyykjma.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:1692
  - - \??\c:\Program Files\wciwinf\znzf.exe
      "c:\Program Files\wciwinf\znzf.exe" "c:\Program Files\wciwinf\znzfr.dll",DecodeImage C:\Users\Admin\AppData\Local\Temp\xypyykjma.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:2152

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

znzf.exe

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

Submit Download

xypyykjma.exe

Path C:\Users\Admin\AppData\Local\Temp\xypyykjma.exe
Size 204KB
SHA256 5df5954f13ff30595d3f93f7e04c9cdfb26a45fe2d0887ac4f004fe6d42d2c27
MD5 f67f9637e6beb33e8229b48e9d8f8bd3
SHA1 a3600c42d448234637b9c9c01e0d9db0434764e1
SHA512 cb03fb71c559a5f5b18cfae65b196b27583a2f7ff525339ab65aea7e369fa81929c9ad4e0e3e8b8c6d391a6dc2630d9c3ecefa5c2c50a41cdee7751cb88225af
SSDEEP 6144:ktu5eG4ZAk0NwPkrwvFe1RhooIW6eXRtdbBx:Wu5eG4fsEdtVKh
TLSH
T1E724E10396528827D95A8F32587A0F2A73696F690B1161F3F7CB6CED1B368E33137148
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

znzfr.dll

Path \??\c:\Program Files\wciwinf\znzfr.dll
Size 164KB
SHA256 c81f8c98ba35eca30a3f424d322d72d753ab9ac68578e543659a0419101cdb38
MD5 f75eb60f9e3fe6bcc46e8cc42fe86563
SHA1 44aec5ec685c3827c9e03e5cde63593add53fe9e
SHA512 58e45fc0462aedb615866eb8ce47bcb056128891e1d472bb7545bc18a8210a40bbe70919be34b372e9594f793d236318df4927ff623f7509811fd4779017677e
SSDEEP 3072:1wsMz025nKhnGgYhAAQKuNbySYZoNkrdQmSYgbJklqNJVXCzU:1wsXcFhlWySYZo50gNkleVSI
TLSH
T12BF302C1E298CFF3D80703B22856E87FF7705640D57A96139BC5AB6B282795A383D394
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2152-11-0x0000000010000000-0x0000000010064000-memory.dmp

Download

memory/2152-12-0x0000000010000000-0x0000000010064000-memory.dmp

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memory/2152-15-0x0000000010000000-0x0000000010064000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads