farfli | c8b0c8de727384b5c195083f2d7ffa592cc5b7611e05709764d7a628b4564a84

General

Target
2026-09-10_29c00f1ae5ae9b570ea9f969ed761e98_coinminer_elex_wannacry.exe
Size 421KB
Sample260910-xb9g4aec39
SHA256 c8b0c8de727384b5c195083f2d7ffa592cc5b7611e05709764d7a628b4564a84
MD5 29c00f1ae5ae9b570ea9f969ed761e98
SHA1 779558c71a92d7a42fecb1f08522c4db09543352
SHA512 e2b8cae2f5e3dc0ad8421b4fa4c031be25fb0721fd59788bced2862895ac5c72b508b442c3b33897d647f2f990c53fe30eff831bd373eff5a17fd5e5d360a4df
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6L:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T1A194D02272D0CBA3D0856472CE66E63CD3E5CC689D705E3373E9F65EEA36901423A275
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/2004-6-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/2004-8-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/2004-10-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/2004-6-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2004-8-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2004-10-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral2/files/0x000e00000001b1d0-1.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
5	2004	rundll32.exe
9	2004	rundll32.exe
10	2004	rundll32.exe
11	2004	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5644	oxtjvdvvx.exe

Executes dropped EXE 1 IoCs

pid	Process
5644	oxtjvdvvx.exe

Loads dropped DLL 1 IoCs

pid	Process
2004	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-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\tsfohmf\\rvdfu.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)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	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)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	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\tsfohmf	oxtjvdvvx.exe
File created	\??\c:\Program Files\tsfohmf\rvdfu.dll	oxtjvdvvx.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
2804	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	2026-09-10_29c00f1ae5ae9b570ea9f969ed761e98_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	oxtjvdvvx.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
2804	cmd.exe
2848	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
2848	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2004	rundll32.exe
2004	rundll32.exe
2004	rundll32.exe
2004	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2004	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4456	2026-09-10_29c00f1ae5ae9b570ea9f969ed761e98_coinminer_elex_wannacry.exe
5644	oxtjvdvvx.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 2804	4456	2026-09-10_29c00f1ae5ae9b570ea9f969ed761e98_coinminer_elex_wannacry.exe	89
PID 2804 wrote to memory of 2848	2804	cmd.exe	91
PID 2804 wrote to memory of 5644	2804	cmd.exe	92
PID 5644 wrote to memory of 2004	5644	oxtjvdvvx.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-09-10_29c00f1ae5ae9b570ea9f969ed761e98_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-10_29c00f1ae5ae9b570ea9f969ed761e98_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4456
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\oxtjvdvvx.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-10_29c00f1ae5ae9b570ea9f969ed761e98_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:2804
- - 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:2848
- - C:\Users\Admin\AppData\Local\Temp\oxtjvdvvx.exe
    C:\Users\Admin\AppData\Local\Temp\\oxtjvdvvx.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-10_29c00f1ae5ae9b570ea9f969ed761e98_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:5644
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\tsfohmf\rvdfu.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\oxtjvdvvx.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:2004

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

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Downloads

oxtjvdvvx.exe

Path C:\Users\Admin\AppData\Local\Temp\oxtjvdvvx.exe
Size 421KB
SHA256 dc1ea4395089da124caf6b0b2b195640d69bff4aa74058286c09412d695cf099
MD5 c3fd99e7d1e55123f75b0c1d2df7e212
SHA1 b86e92d8924a5fcd5fa2ebd260e3b203e2b73360
SHA512 7e8b41629a5b97c84e083716e6c445590713ca5e3a849781387a5c2337f85d4bf417c42df9f422b81514c1afce7d33baec7aff0af84a259d734da30254f5332c
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6L:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T10E94D02272D0CBA3D0856472CE66E63CD3E5CC689D705E3373E9F65EEA36901423A275
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

rvdfu.dll

Path \??\c:\Program Files\tsfohmf\rvdfu.dll
Size 176KB
SHA256 8523e7eb8f66155446eeee92a9e80abdc4ccffb8f0ad84056c6f33239312d92d
MD5 16de89487a944745e59f0b41e1acc31d
SHA1 c2c0fce37ec413fc32507325e30544568c2ee793
SHA512 cd200e45675db3ee132e5d57c091cc9628f4bc77b0170e555cab0454f7c4dd6f9bf4e4783a84374320a56fda0573400d5a66b20f40b8b9876f1fa8facbe619b7
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocR:1Jv2tOItshGYdMnYYVjasKbOWSFofR
TLSH
T10B041261862D1C34D087B7717B05920DF6B452A491B9CBD3F7B8AF2B3D12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2004-6-0x0000000010000000-0x0000000010067000-memory.dmp

Download

memory/2004-9-0x000000001005A000-0x000000001005B000-memory.dmp

Download

memory/2004-8-0x0000000010000000-0x0000000010067000-memory.dmp

Download

memory/2004-10-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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