farfli | a246eb7a17232326d457ed137ea59cd6f60387b19bcdbf2c813412033ec7304d

Analysis

max time kernel
148s
max time network
155s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/08/2026, 04:18

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General

Target
2026-08-10_9af1c8e3a81cb6174682cb5e40a671f8_coinminer_elex_wannacry.exe
Size 412KB
Sample260810-ew1ftavyaz
SHA256 a246eb7a17232326d457ed137ea59cd6f60387b19bcdbf2c813412033ec7304d
MD5 9af1c8e3a81cb6174682cb5e40a671f8
SHA1 fc1acfc6be8e9dd606c000b982054ad53bf8721c
SHA512 5fa2e39f22cb3ad8bf501e2e2d7c61509ab3f1e9d2346de0bc92a53757cb4c00566934467c5ff609aa3b0f56dabea4efce58ce8629359fac09ee47a63e9d6ca1
SSDEEP 6144:qKgGmTBsuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F19S:UGmTau+mMC4ITJE8dfSJ/F1
TLSH
T15F94D02272D08BA3C1866032CD66EA7CD3E5CD689C705E3773E9F65DEE36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit 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/5164-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/5164-13-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/5164-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5164-13-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5436-0-0x0000000000400000-0x0000000000492000-memory.dmp	UPX
behavioral2/memory/5436-2-0x0000000000400000-0x0000000000492000-memory.dmp	UPX
behavioral2/files/0x0009000000011374-3.dat	UPX
behavioral2/memory/5940-6-0x0000000000400000-0x0000000000492000-memory.dmp	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
3	5164	rundll32.exe
10	5164	rundll32.exe
11	5164	rundll32.exe
12	5164	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5940	kubno.exe

Executes dropped EXE 1 IoCs

pid	Process
5940	kubno.exe

Loads dropped DLL 1 IoCs

pid	Process
5164	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-1-5-21-2115213192-531537726-3295841909-1000\Software\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\soyds\\nreib.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)	\??\v:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	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)	\??\b:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	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\soyds	kubno.exe
File created	\??\c:\Program Files\soyds\nreib.dll	kubno.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
1016	cmd.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	2026-08-10_9af1c8e3a81cb6174682cb5e40a671f8_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	kubno.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
1580	PING.EXE
1016	cmd.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
1580	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5164	rundll32.exe
5164	rundll32.exe
5164	rundll32.exe
5164	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5164	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5436	2026-08-10_9af1c8e3a81cb6174682cb5e40a671f8_coinminer_elex_wannacry.exe
5940	kubno.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5436 wrote to memory of 1016	5436	2026-08-10_9af1c8e3a81cb6174682cb5e40a671f8_coinminer_elex_wannacry.exe	88
PID 1016 wrote to memory of 1580	1016	cmd.exe	90
PID 1016 wrote to memory of 5940	1016	cmd.exe	91
PID 5940 wrote to memory of 5164	5940	kubno.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-08-10_9af1c8e3a81cb6174682cb5e40a671f8_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-10_9af1c8e3a81cb6174682cb5e40a671f8_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5436
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\kubno.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-10_9af1c8e3a81cb6174682cb5e40a671f8_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:1016
- - 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:1580
- - C:\Users\Admin\AppData\Local\Temp\kubno.exe
    C:\Users\Admin\AppData\Local\Temp\\kubno.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-10_9af1c8e3a81cb6174682cb5e40a671f8_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:5940
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\soyds\nreib.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\kubno.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:5164

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

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

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Downloads

kubno.exe

Path C:\Users\Admin\AppData\Local\Temp\kubno.exe
Size 412KB
SHA256 30adc6400242e8e2f080b5a45c2436d9001851d0215767baebf4232d828a1206
MD5 8fca966c05389486d3b7303a06d47fb4
SHA1 6de0e672a13388dad8adeabc0e20f13c9d1a2324
SHA512 7c70bee9b8da7ce3ba4146fbfe08bca2ce8fc3fdf758e19a6864fbe3526bfc3526884ba21c2533bb77338d08da373c2bfcbdb8b3160d7e11e33e4e6478b1aa0e
SSDEEP 6144:qKgGmTBsuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F19S+:UGmTau+mMC4ITJE8dfSJ/F1j
TLSH
T1F094D02272D08BA3C1866032CD66EA7CD3E5CD689C705E3773E9F65DEE36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nreib.dll

Path \??\c:\Program Files\soyds\nreib.dll
Size 176KB
SHA256 3a7dd336d3a6e63d8bf6d1253a93d3ca949cfe46b0ce71edaf73bb024426eb01
MD5 8981d2d204671e065aca38be79e3d263
SHA1 e5f6aa853f56679c8857ac28ade8f60250a2d919
SHA512 d0f3c73fbcff9f59b3d77a60995877c67bf7683c36afe6f1b9eb852fa11a44bc709bd32934a9b5755a8968d3f671d8a5fc84c02023906ca1a5e85fdc67b51862
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocV:1Jv2tOItshGYdMnYYVjasKbOWSFofV
TLSH
T128041261866D1C34D087B7717B05920DF6B453A49079CB93F7B8AF2B3D12AEA806E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/5164-10-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/5164-9-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/5164-11-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/5164-13-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/5436-0-0x0000000000400000-0x0000000000492000-memory.dmp

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memory/5436-2-0x0000000000400000-0x0000000000492000-memory.dmp

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memory/5940-6-0x0000000000400000-0x0000000000492000-memory.dmp

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