farfli | 20db8b01473a93be70c64547388219ad5bf8019820bc382da9f39b04c2035b57

General

Target
2026-08-22_958dcdc51542da625cae93cc0a5b8859_coinminer_elex_wannacry.exe
Size 420KB
Sample260823-e79tmaek2s
SHA256 20db8b01473a93be70c64547388219ad5bf8019820bc382da9f39b04c2035b57
MD5 958dcdc51542da625cae93cc0a5b8859
SHA1 7c411d6244525601ca78c7a0b0c7d34561816dc9
SHA512 690f2516fd831f968aec2e85c26dfbce6cf4057e6bb147790a3fab01366bb84c8935b6160d794724ac5e0cce576b601a799066a85885f465ca6768d8bf1945b4
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LE:jGmTju+mMC4ITJE8dfSJ/F6I
TLSH
T18F94D02272D0CBA3C0856472CE66E63CD3E5CC689D705E3773E9F65EEA36901423A275
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/4216-8-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/4216-6-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/4216-10-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4216-8-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4216-6-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4216-10-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral2/files/0x000900000001138e-1.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
8	4216	rundll32.exe
12	4216	rundll32.exe
11	4216	rundll32.exe
13	4216	rundll32.exe

Deletes itself 1 IoCs

pid	Process
916	nygss.exe

Executes dropped EXE 1 IoCs

pid	Process
916	nygss.exe

Loads dropped DLL 1 IoCs

pid	Process
4216	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-1-5-21-1079202589-886135813-2527035092-1000\Software\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\hzfof\\yrpfv.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)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	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)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\w:	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)	\??\m:	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\hzfof	nygss.exe
File created	\??\c:\Program Files\hzfof\yrpfv.dll	nygss.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
4512	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-22_958dcdc51542da625cae93cc0a5b8859_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	nygss.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
4512	cmd.exe
1616	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
1616	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4216	rundll32.exe
4216	rundll32.exe
4216	rundll32.exe
4216	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4216	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4704	2026-08-22_958dcdc51542da625cae93cc0a5b8859_coinminer_elex_wannacry.exe
916	nygss.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4704 wrote to memory of 4512	4704	2026-08-22_958dcdc51542da625cae93cc0a5b8859_coinminer_elex_wannacry.exe	89
PID 4512 wrote to memory of 1616	4512	cmd.exe	91
PID 4512 wrote to memory of 916	4512	cmd.exe	92
PID 916 wrote to memory of 4216	916	nygss.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-22_958dcdc51542da625cae93cc0a5b8859_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-22_958dcdc51542da625cae93cc0a5b8859_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4704
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\nygss.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-22_958dcdc51542da625cae93cc0a5b8859_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:4512
- - 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:1616
- - C:\Users\Admin\AppData\Local\Temp\nygss.exe
    C:\Users\Admin\AppData\Local\Temp\\nygss.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-22_958dcdc51542da625cae93cc0a5b8859_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:916
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\hzfof\yrpfv.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\nygss.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:4216

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

nygss.exe

Path C:\Users\Admin\AppData\Local\Temp\nygss.exe
Size 420KB
SHA256 dadedcba13887dc4b7a933023aa5dd6aac28c4600eb5085120d997f72b539c4c
MD5 0565d5ab36acd87592586dc131d02c35
SHA1 b856c20aca912e4ad2771e7ac268cd1fe888ece4
SHA512 95a7d9b0f66a72fb6dcd39372a6d20c86c75ad7ac72e3aec12bca42d709a37dbfa69c20adb39f55e2f86ae3599a4df9eff4e79f6994bf7a79eaa829c974e466f
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LE:jGmTju+mMC4ITJE8dfSJ/F6A
TLSH
T11494D02272D0CBA3C0856472CE66E63CD3E5CC689D705E3773E9F65EEA36901423A275
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

yrpfv.dll

Path \??\c:\Program Files\hzfof\yrpfv.dll
Size 176KB
SHA256 7b00eb94440d3564908a3dd15e314f2766a75fac7b28407771f6992886b1ceba
MD5 ff3bbe4d3330a437891c00b85beffb3b
SHA1 ae0463d16a52e125de802c28e928f0c66f7ac17f
SHA512 e286c536e8633e77d0d450bc06a099d129725e5b4e4efba393e8a15b3ee0891b636bf1d6ba4ae219690fc2e0e082546e8c20a0a486732eb3c4b080138a5d7c2d
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocl:1Jv2tOItshGYdMnYYVjasKbOWSFofl
TLSH
T1B4041261862D1C30D087B7717B05924DF6B453A49079CB93F7B8AF2B3D12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4216-7-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/4216-8-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4216-6-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4216-10-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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