farfli | 70a8351b79c38556d7002fe01c780ae52ed8e46fc2902a39ec908fb678302d0c

General

Target
2026-05-24_9e1c213881106a99ed6cdd5d829b1f4e_coinminer_elex_wannacry.exe
Size 412KB
Sample260524-2f4vmaby8z
SHA256 70a8351b79c38556d7002fe01c780ae52ed8e46fc2902a39ec908fb678302d0c
MD5 9e1c213881106a99ed6cdd5d829b1f4e
SHA1 73905b8a9093573b6e8b67f6c97f7d75073e0764
SHA512 cef49f45008e0847268c213bb3b392287b7b191065c5f91b79821957d534ddc0017ac92b5e677872a0ee7b5378200e7de45bb3cdb797bafad0138e46c80ea214
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LSZ:jGmTju+mMC4ITJE8dfSJ/F6q
TLSH
T16294D02272D08BA3C1866432CE66E67CD3E5CC689C705E3773E9F65EED36941423A274
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
behavioral2/memory/1684-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/1684-7-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/1684-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/1684-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1684-7-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1684-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral2/files/0x001d00000002b107-2.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
1	1684	rundll32.exe
4	1684	rundll32.exe
5	1684	rundll32.exe
6	1684	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4448	pyfoq.exe

Executes dropped EXE 1 IoCs

pid	Process
4448	pyfoq.exe

Loads dropped DLL 1 IoCs

pid	Process
1684	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-1-5-21-2043432456-1617298091-2772621413-1000\Software\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\bfrguiua\\abrzmm.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)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	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)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	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)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	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\bfrguiua	pyfoq.exe
File created	\??\c:\Program Files\bfrguiua\abrzmm.dll	pyfoq.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	2026-05-24_9e1c213881106a99ed6cdd5d829b1f4e_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	pyfoq.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
2312	cmd.exe
2140	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
2140	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1684	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3516	2026-05-24_9e1c213881106a99ed6cdd5d829b1f4e_coinminer_elex_wannacry.exe
4448	pyfoq.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3516 wrote to memory of 2312	3516	2026-05-24_9e1c213881106a99ed6cdd5d829b1f4e_coinminer_elex_wannacry.exe	80
PID 2312 wrote to memory of 2140	2312	cmd.exe	82
PID 2312 wrote to memory of 4448	2312	cmd.exe	83
PID 4448 wrote to memory of 1684	4448	pyfoq.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-05-24_9e1c213881106a99ed6cdd5d829b1f4e_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-24_9e1c213881106a99ed6cdd5d829b1f4e_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3516
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\pyfoq.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-24_9e1c213881106a99ed6cdd5d829b1f4e_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2312
- - 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:2140
- - C:\Users\Admin\AppData\Local\Temp\pyfoq.exe
    C:\Users\Admin\AppData\Local\Temp\\pyfoq.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-24_9e1c213881106a99ed6cdd5d829b1f4e_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:4448
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\bfrguiua\abrzmm.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\pyfoq.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:1684

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

pyfoq.exe

Path C:\Users\Admin\AppData\Local\Temp\pyfoq.exe
Size 412KB
SHA256 afcb8348ad7126823a71bdbdc599c2c825f63e9501105cb75430b742914054bd
MD5 299dacdff0fa40bbe9fea51da480f9c7
SHA1 ba4338834f7cf1bcc9b7a49aa1a54b27f5e15950
SHA512 afb85dbace9290361e5b55e657eedcdeb52faf614ece6a0fbffbfcee4ce95ba322c9ff8fa8fa79b4a5481cb86f4171aaccd79d2a9b79bd64a15abe8acfc726f2
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LSE:jGmTju+mMC4ITJE8dfSJ/F69
TLSH
T13C94D02272D08BA3C1866432CE66E67CD3E5CC689C705E3773E9F65EED36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

abrzmm.dll

Path \??\c:\Program Files\bfrguiua\abrzmm.dll
Size 176KB
SHA256 d957ab3c0692e18d3a33df3c6c1211b19817167e3cda9faa10614c44c94d72bb
MD5 b8f73ca38c6c177ad7137ef9b1c206f2
SHA1 23e5b50ccaaaa869320d11bea6f6a084623df442
SHA512 9e26e7df752b8083d8108be5db77068de2658094eca3515ed471fb1a024249265c6f69146ffd23945c6ff33fd714451f3e4f36c2d8c01a96687361c986b609b9
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocg:1Jv2tOItshGYdMnYYVjasKbOWSFofg
TLSH
T1C9041261866D1C34D087B7717B05920DF6B452A49079CBD3F7B8AF2B3D12AEA806E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1684-9-0x0000000010000000-0x0000000010067000-memory.dmp

Download

memory/1684-10-0x000000001005A000-0x000000001005B000-memory.dmp

Download

memory/1684-7-0x0000000010000000-0x0000000010067000-memory.dmp

Download

memory/1684-11-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads