farfli | 5708e48ed25acf45a3230a5981a066db61c311202f4b63879b1f7ce98b9923cb

General

Target
2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe
Size 411KB
Sample260522-wdf3wsb17k
SHA256 5708e48ed25acf45a3230a5981a066db61c311202f4b63879b1f7ce98b9923cb
MD5 3f161c7d2c6388827a5ac2900e5cff97
SHA1 91b09f2ce6c4b3fb558a0c95b20fac548d89d41c
SHA512 ef049e95ee4663ed3ff991eafa699ba4a78aa47f18fd39f974f02a4a0681958551c08521d83f2acc65cf4037dff403bbf841b160e8ff2f85b12c50ef6bc2b48c
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LS:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T10494D02272D08BA3C1856432CE66E67CD3E5CC689C705E3773E9F65EEE36941423A274
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/2220-7-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/2220-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/2220-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/2220-7-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2220-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2220-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral2/files/0x000600000000d40b-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	2220	rundll32.exe
3	2220	rundll32.exe
4	2220	rundll32.exe
5	2220	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3480	surhl.exe

Executes dropped EXE 1 IoCs

pid	Process
3480	surhl.exe

Loads dropped DLL 1 IoCs

pid	Process
2220	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-1-5-21-125073035-2952146151-721812867-1000\Software\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\bpkvx\\wznov.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)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\k:	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)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	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\bpkvx	surhl.exe
File created	\??\c:\Program Files\bpkvx\wznov.dll	surhl.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	2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_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	surhl.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
2988	cmd.exe
4488	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
4488	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2220	rundll32.exe
2220	rundll32.exe
2220	rundll32.exe
2220	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2220	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2752	2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe
3480	surhl.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2752 wrote to memory of 2988	2752	2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe	80
PID 2988 wrote to memory of 4488	2988	cmd.exe	82
PID 2988 wrote to memory of 3480	2988	cmd.exe	83
PID 3480 wrote to memory of 2220	3480	surhl.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\surhl.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2988
- - 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:4488
- - C:\Users\Admin\AppData\Local\Temp\surhl.exe
    C:\Users\Admin\AppData\Local\Temp\\surhl.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-22_3f161c7d2c6388827a5ac2900e5cff97_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:3480
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\bpkvx\wznov.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\surhl.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:2220

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

surhl.exe

Path C:\Users\Admin\AppData\Local\Temp\surhl.exe
Size 411KB
SHA256 4059e42bebb5a981c72965b141522a21ff4c727955cd961c10f0c97ae80f0a14
MD5 dac9144efbce2ed83b0a6c1293884aec
SHA1 141a5c56137a54762155571e137027204abd91d8
SHA512 6102ac549441d383019c028783e15428a84a2e3c86ea5299cafeb5574f80a734cfb09f6ca7048251ac821d39141abf9fd438a4caf359e63f50891a5ccc239ff4
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LS6:jGmTju+mMC4ITJE8dfSJ/F6D
TLSH
T1FF94D02272D08BA3C1856432CE66E67CD3E5CC689C705E3773E9F65EEE36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

wznov.dll

Path \??\c:\Program Files\bpkvx\wznov.dll
Size 176KB
SHA256 0d031f89cfc83d0ecf6ee81804cac97b9ee309f3c5cff33cb2e99f0ce550368d
MD5 38d8d0951a9330ed047e1e6b380a96b5
SHA1 390f4c6dcb0eab5022ce933c84bfa90fa4702652
SHA512 b7df291bba1bec6f3d66804c07d45d34b512c4600ea11c9d32f5b6b22d66ddfd8e4b3e3c3e6864ef064a56d31f7bfc34f40975e4aaa765f644bb869f62f4e00e
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocR:1Jv2tOItshGYdMnYYVjasKbOWSFofR
TLSH
T198041261862D1C34D087B7717B05920DF6B452A49179CBD3F7B8AF2B3D12AEA806E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2220-7-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/2220-10-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/2220-9-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/2220-11-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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