farfli | 629eeac2ad34bcb4a28be723334ed90ae6e83ecc43b5d45303377103519dbbae

General

Target
2026-09-04_2c5b09b39061d0eb6e122f95c869aed4_coinminer_elex_wannacry.exe
Size 403KB
Sample260905-swxa2sem5w
SHA256 629eeac2ad34bcb4a28be723334ed90ae6e83ecc43b5d45303377103519dbbae
MD5 2c5b09b39061d0eb6e122f95c869aed4
SHA1 208beb6e6c5bb937d5e1dc621bbe07fd6655789f
SHA512 10102f26fa839e6f70f781f2a40c9e36d0cefe6c3bfc3fcdbb0d0c147895fdbe16106deccd02b1e57f2d0d0cb78f03d6d93ea4ba2dfb4a206894a8f286c74b85
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6L:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T16694D02272C08BA3C1856432CDA6E67CD3E5CD689C709E3773E9FA5DDE36841423A275
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 3 IoCs

resource	yara_rule
behavioral2/memory/4664-6-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/4664-8-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/4664-10-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4664-6-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4664-8-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4664-10-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral2/files/0x000b000000011377-1.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
4	4664	rundll32.exe
7	4664	rundll32.exe
8	4664	rundll32.exe
12	4664	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2332	ykrnjujuc.exe

Executes dropped EXE 1 IoCs

pid	Process
2332	ykrnjujuc.exe

Loads dropped DLL 1 IoCs

pid	Process
4664	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-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\vyhpbxr\\ifoce.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)	\??\a:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	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\vyhpbxr	ykrnjujuc.exe
File created	\??\c:\Program Files\vyhpbxr\ifoce.dll	ykrnjujuc.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
5848	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ykrnjujuc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-09-04_2c5b09b39061d0eb6e122f95c869aed4_coinminer_elex_wannacry.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
5792	PING.EXE
5848	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
5792	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4664	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1264	2026-09-04_2c5b09b39061d0eb6e122f95c869aed4_coinminer_elex_wannacry.exe
2332	ykrnjujuc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1264 wrote to memory of 5848	1264	2026-09-04_2c5b09b39061d0eb6e122f95c869aed4_coinminer_elex_wannacry.exe	89
PID 5848 wrote to memory of 5792	5848	cmd.exe	91
PID 5848 wrote to memory of 2332	5848	cmd.exe	92
PID 2332 wrote to memory of 4664	2332	ykrnjujuc.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-09-04_2c5b09b39061d0eb6e122f95c869aed4_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-04_2c5b09b39061d0eb6e122f95c869aed4_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1264
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ykrnjujuc.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-04_2c5b09b39061d0eb6e122f95c869aed4_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:5848
- - 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:5792
- - C:\Users\Admin\AppData\Local\Temp\ykrnjujuc.exe
    C:\Users\Admin\AppData\Local\Temp\\ykrnjujuc.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-04_2c5b09b39061d0eb6e122f95c869aed4_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:2332
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\vyhpbxr\ifoce.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\ykrnjujuc.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:4664

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

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

Replay Monitor

Loading Replay Monitor...

Downloads

ykrnjujuc.exe

Path C:\Users\Admin\AppData\Local\Temp\ykrnjujuc.exe
Size 403KB
SHA256 5b070af6a342a5a967999393e19ce4c6dbf654240365359963b19af18dd59e2a
MD5 55f24d5d3ffed896f0cab69748ba00a0
SHA1 9deebdb7b4135dcd8febac73d5707c636a4c1d5a
SHA512 5c74b42562f367adb8af4f2d40fcfece3171827a2bdae805a1a33b5630302247b5741e9bfac892825ed7c26d10f01a78900502096e0d20e09aa564ce3ff36aa0
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6Lc:jGmTju+mMC4ITJE8dfSJ/F64
TLSH
T14894C02272C08BA3C1856432CDA6E67CD3E5CD689C709E3773E9FA5DDE36841423A275
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ifoce.dll

Path \??\c:\Program Files\vyhpbxr\ifoce.dll
Size 176KB
SHA256 194e3ce7c4eae0ce7d2306654419153ea7c910acd5beda7a0b6b98cb59e5021f
MD5 baa6bee810036dca9e142aa8330fe594
SHA1 f62e61dc57881f1378fafc8eb099266af57298dd
SHA512 e64f1c4bdccc0681e8ce6eaeb689cf0aa1ef373e9df9dda7d9261bed041178851e7415b9eae921b4fbed24ccc795fe41a0767d82e676268eabd78d6eb5b1c410
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocf:1Jv2tOItshGYdMnYYVjasKbOWSFoff
TLSH
T1DA041261862D1C34D087B7717F05920DF6B452A491B9CB93F7B8AF2B3D12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4664-6-0x0000000010000000-0x0000000010067000-memory.dmp

Download

memory/4664-8-0x0000000010000000-0x0000000010067000-memory.dmp

Download

memory/4664-9-0x000000001005A000-0x000000001005B000-memory.dmp

Download

memory/4664-10-0x0000000010000000-0x0000000010067000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads