farfli | 0d4019a54c75592e103034aae3b54a049c813982f19aecfb15781951e9457be2

General

Target
2026-10-16_f6f44c4f67e44c05f43a2ef6d3a0ed9f_coinminer_elex_wannacry.exe
Size 405KB
Sample261017-cpdmcscf84
SHA256 0d4019a54c75592e103034aae3b54a049c813982f19aecfb15781951e9457be2
MD5 f6f44c4f67e44c05f43a2ef6d3a0ed9f
SHA1 a76558b9237937d765983b5b4cf1ebbe2b0560c0
SHA512 c3780feba862c70c9573faa7eb4f03e2a92008383dc8b560dce7a6dbaa1eb8035242cde1733109f2d4b2b31dabdba82bd451cf9767378ecbcba5e71cbfbb4d93
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LSa:jGmTju+mMC4ITJE8dfSJ/F6N
TLSH
T10E94D02272C08BA3C1866432CDA6EA7CD3E5CD689C705E3773E9F65DDE36941423A274
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 3 IoCs

resource	yara_rule
behavioral1/memory/1528-7-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/1528-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/1528-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/1528-7-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1528-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1528-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral1/files/0x00070000000004e8-2.dat	UPX

Badlisted process makes network request 4 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
6	1528	rundll32.exe
16	1528	rundll32.exe
17	1528	rundll32.exe
32	1528	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
1836	nbdhgffb.exe

Executes dropped EXE 1 IoCs

pid	Process
1836	nbdhgffb.exe

Loads dropped DLL 1 IoCs

pid	Process
1528	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-1-5-21-895009113-1202185046-1686627690-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\uczuw\\xuxzbrhi.dll\",InitEngine"	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)	\??\m:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	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\uczuw	nbdhgffb.exe
File created	\??\c:\Program Files\uczuw\xuxzbrhi.dll	nbdhgffb.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
2892	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	rundll32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-16_f6f44c4f67e44c05f43a2ef6d3a0ed9f_coinminer_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	nbdhgffb.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
2892	cmd.exe
648	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
648	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1528	rundll32.exe
1528	rundll32.exe
1528	rundll32.exe
1528	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1528	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3984	2026-10-16_f6f44c4f67e44c05f43a2ef6d3a0ed9f_coinminer_elex_wannacry.exe
1836	nbdhgffb.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3984 wrote to memory of 2892	3984	2026-10-16_f6f44c4f67e44c05f43a2ef6d3a0ed9f_coinminer_elex_wannacry.exe	87
PID 2892 wrote to memory of 648	2892	cmd.exe	89
PID 2892 wrote to memory of 1836	2892	cmd.exe	91
PID 1836 wrote to memory of 1528	1836	nbdhgffb.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-10-16_f6f44c4f67e44c05f43a2ef6d3a0ed9f_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-16_f6f44c4f67e44c05f43a2ef6d3a0ed9f_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3984
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\nbdhgffb.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-16_f6f44c4f67e44c05f43a2ef6d3a0ed9f_coinminer_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:2892
- - 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:648
- - C:\Users\Admin\AppData\Local\Temp\nbdhgffb.exe
    C:\Users\Admin\AppData\Local\Temp\\nbdhgffb.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-16_f6f44c4f67e44c05f43a2ef6d3a0ed9f_coinminer_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:1836
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\uczuw\xuxzbrhi.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\nbdhgffb.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:1528

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

nbdhgffb.exe

Path C:\Users\Admin\AppData\Local\Temp\nbdhgffb.exe
Size 405KB
SHA256 ea9a74057940caf6be8505163f1830e1b1ddb02605359d37f713d43f051a7b62
MD5 0028384a69aa53aeacff31ffe93c61f1
SHA1 bb13a8e6af6af8ccd1c959d88c77b26aba2b1d24
SHA512 129b8c03152c6296b311134e93cfc21d24a0df97571f94d72ac2bea31a4bf1e28e3aa57b6384b0ae75023913f6b689207735e7973e11f1d1d6fa6ae6b2bb1a0b
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LSI:jGmTju+mMC4ITJE8dfSJ/F6P
TLSH
T15F94D02272C08BA3C1866432CDA6E67CD3E5CD689C705E3773E9F65DDE36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

xuxzbrhi.dll

Path \??\c:\Program Files\uczuw\xuxzbrhi.dll
Size 176KB
SHA256 e5d012f6a4194daca20d90074072444f3ebdb8c01dd8aa4f27d148f21bdb5be4
MD5 d4ee37e2011ac3d50a41fbb0e185e630
SHA1 c63360d02840729e80e46d1889918aa3328eae99
SHA512 6af6cc9b61f6571ea67d2749c3b0894090b64562346ecca090f4a57721ef6ab341f5b0b9ac92dbb5ab4db990ea5ddbc0fe2eb9944bf217685a34f1a89dd1cdc6
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocG:1Jv2tOItshGYdMnYYVjasKbOWSFofG
TLSH
T1CB041261866D1C34C087B7717B05920DF6B452A49179CBD3F7B8AF2B3D12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1528-8-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/1528-7-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/1528-9-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/1528-11-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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