farfli | 5708e48ed25acf45a3230a5981a066db61c311202f4b63879b1f7ce98b9923cb

General

Target
2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe
Size 411KB
Sample260522-wdf3wsb17k
SHA256 5708e48ed25acf45a3230a5981a066db61c311202f4b63879b1f7ce98b9923cb
MD5 3f161c7d2c6388827a5ac2900e5cff97
SHA1 91b09f2ce6c4b3fb558a0c95b20fac548d89d41c
SHA512 ef049e95ee4663ed3ff991eafa699ba4a78aa47f18fd39f974f02a4a0681958551c08521d83f2acc65cf4037dff403bbf841b160e8ff2f85b12c50ef6bc2b48c
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LS:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T10494D02272D08BA3C1856432CE66E67CD3E5CC689C705E3773E9F65EEE36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery 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/4972-7-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/4972-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/4972-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/4972-7-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4972-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4972-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral1/files/0x000a000000023fe5-2.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
25	4972	rundll32.exe
33	4972	rundll32.exe
34	4972	rundll32.exe
52	4972	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3472	oukgbt.exe

Executes dropped EXE 1 IoCs

pid	Process
3472	oukgbt.exe

Loads dropped DLL 1 IoCs

pid	Process
4972	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-1-5-21-889581200-2041691093-2048517887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\triez\\hyxcf.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)	\??\g:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\w:	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 created	\??\c:\Program Files\triez\hyxcf.dll	oukgbt.exe
File opened for modification	\??\c:\Program Files\triez	oukgbt.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	2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_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	oukgbt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
2328	cmd.exe
3832	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
3832	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4972	rundll32.exe
4972	rundll32.exe
4972	rundll32.exe
4972	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4972	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4676	2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe
3472	oukgbt.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4676 wrote to memory of 2328	4676	2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe	88
PID 2328 wrote to memory of 3832	2328	cmd.exe	90
PID 2328 wrote to memory of 3472	2328	cmd.exe	91
PID 3472 wrote to memory of 4972	3472	oukgbt.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4676
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\oukgbt.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2328
- - 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:3832
- - C:\Users\Admin\AppData\Local\Temp\oukgbt.exe
    C:\Users\Admin\AppData\Local\Temp\\oukgbt.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_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:3472
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\triez\hyxcf.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\oukgbt.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)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4972

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

Modify Registry

1

T1112

Pre-OS Boot

1

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

1

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

oukgbt.exe

Path C:\Users\Admin\AppData\Local\Temp\oukgbt.exe
Size 411KB
SHA256 ff20c6998c42a82fe7663d8fe1a44562be7d3cbfe23079d0a76259a209f02225
MD5 38751031040ff43071c7e39abb7303c3
SHA1 54127c37ee30684c2d1db9a9b3c597b1c4b98417
SHA512 1b1e4f3ea2b0aa986217154277ed815d0e8b7112e6f278bbca73c8c1470e5f67d80d50ae1b146cad443d927748cce0e7e82d06083d290b06316cf111e7551a35
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LS:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T18C94D02272D08BA3C1856432CE66E67CD3E5CC689C705E3773E9F65EEE36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

hyxcf.dll

Path \??\c:\Program Files\triez\hyxcf.dll
Size 176KB
SHA256 aaf2a464e3e979d29a854c8e6d0b7762efc85f9a38fb79b2c39fa2cbc5dd09bc
MD5 ef23eaf484551b6e9fbe34928cd56738
SHA1 a223774e6eb8b4418a2c1e81d4703707ed08f79e
SHA512 69ba90af38c768452cacb6a2e5581ef74f1d0850429f8e312b5d077cb0ff55e3d5769b78b702be0b6be7f187608a868916f88e7076de265512835a7b83eb77ee
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocM:1Jv2tOItshGYdMnYYVjasKbOWSFofM
TLSH
T11D041261866D1C34C087B7717B05920DF6B453A491B9CBD3F7B8AF2A3D12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4972-7-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4972-10-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/4972-9-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4972-11-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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