farfli | 4f165dd1d3557c47887aa054bcc2f1dec3e41be1e557cf24c4e96ba943bee181

General

Target
2026-04-15_102cf5d3022d7514825814af5be76c9c_coinminer_elex_wannacry.exe
Size 413KB
Sample260415-3a2nrad19w
SHA256 4f165dd1d3557c47887aa054bcc2f1dec3e41be1e557cf24c4e96ba943bee181
MD5 102cf5d3022d7514825814af5be76c9c
SHA1 ee4e8e735b31976ae55fa6b1afe2eae60cc2666f
SHA512 1373db1db5ff2131d30ae0670a13f57c225a9cbf3f5a06c49175193236e22b576e08b58017383bcf8fe8e234a79bd080abdc908841de475da5ef3f4088601213
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6L:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T12694D02272D0CBA3C0856432CE66E63CD3E5CC689D705E3773E9FA5DEA36941423A275
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 2 IoCs

resource	yara_rule
behavioral1/memory/4816-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/4816-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/4816-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4816-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral1/files/0x001300000001efa2-3.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
3	4816	rundll32.exe
13	4816	rundll32.exe
14	4816	rundll32.exe
28	4816	rundll32.exe

Deletes itself 1 IoCs

pid	Process
640	hhbyl.exe

Executes dropped EXE 1 IoCs

pid	Process
640	hhbyl.exe

Loads dropped DLL 1 IoCs

pid	Process
4816	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-1-5-21-914486190-3969805341-592249730-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\lwupubea\\wfsmib.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)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	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\lwupubea	hhbyl.exe
File created	\??\c:\Program Files\lwupubea\wfsmib.dll	hhbyl.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	hhbyl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-15_102cf5d3022d7514825814af5be76c9c_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

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
1480	cmd.exe
3980	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
3980	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4816	rundll32.exe
4816	rundll32.exe
4816	rundll32.exe
4816	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4816	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3596	2026-04-15_102cf5d3022d7514825814af5be76c9c_coinminer_elex_wannacry.exe
640	hhbyl.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3596 wrote to memory of 1480	3596	2026-04-15_102cf5d3022d7514825814af5be76c9c_coinminer_elex_wannacry.exe	87
PID 1480 wrote to memory of 3980	1480	cmd.exe	89
PID 1480 wrote to memory of 640	1480	cmd.exe	90
PID 640 wrote to memory of 4816	640	hhbyl.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-04-15_102cf5d3022d7514825814af5be76c9c_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-15_102cf5d3022d7514825814af5be76c9c_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3596
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\hhbyl.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-15_102cf5d3022d7514825814af5be76c9c_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1480
- - 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:3980
- - C:\Users\Admin\AppData\Local\Temp\hhbyl.exe
    C:\Users\Admin\AppData\Local\Temp\\hhbyl.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-15_102cf5d3022d7514825814af5be76c9c_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:640
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\lwupubea\wfsmib.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\hhbyl.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:4816

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

wfsmib.dll

Path C:\Program Files\lwupubea\wfsmib.dll
Size 176KB
SHA256 4b959fcce873bbe76451b27a614e51bc7182c0049f1d9e0658df88942e085c92
MD5 419a72effbc3c2c4ec15c38d18bb4ace
SHA1 9b1575c80987a5c95d4f7146e500b398d75b868b
SHA512 76c1441909bb803c5c4131a9a345c478edb05b1fc55e6b817f0e243b9125b1050a32ecefd7d0b5f484c3581da6916b834a73801994578424c6643e6042464a3d
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocU:1Jv2tOItshGYdMnYYVjasKbOWSFofU
TLSH
T19C041261862D1C34D087B7717B05920DF6B452A49179CBD3F7B8AF2B3D12AEA806E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

hhbyl.exe

Path C:\Users\Admin\AppData\Local\Temp\hhbyl.exe
Size 413KB
SHA256 a0381467cee1cd3507c829a129236a90bf4e82a86edb639b889933bb4abdbc6a
MD5 afa0dc39748fd43a95341c1d25dd169a
SHA1 82424791eacb49665dd317fd155428b8beacfb01
SHA512 a113355e7cf8248dab6dd9ce8cfe7d9cacb82c68bd5c38c244b5f8c470ab26f89c54d7b1373be244dc9bb45dc8592dc4e1e07b2e43cf93bc5a75ba6b150cd10d
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LP:jGmTju+mMC4ITJE8dfSJ/F6j
TLSH
T14E94D02272D0CBA3C0856432CE66E63CD3E5CC689D705E3773E9FA5DEA36941423A275
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4816-9-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4816-8-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/4816-7-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4816-11-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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