farfli | 48f4aeff0ac22b82c5596c203b1a47c0a4aa12db8d9d2ebf67b619f0005bb0e8

General

Target
2026-08-21_817557e05b474c1b6d46ab5f82161ade_elex_wannacry.exe
Size 123KB
Sample260822-ntwvaagn2s
SHA256 48f4aeff0ac22b82c5596c203b1a47c0a4aa12db8d9d2ebf67b619f0005bb0e8
MD5 817557e05b474c1b6d46ab5f82161ade
SHA1 42d03ba41275df0f7c6f4401830dfb0a44261280
SHA512 a90f863aaf5a31742fdba0d1d6191cc6a10448ac318fd73837eb91f14180bd29dfa311d64264e1d8db69a54650cf81265aee1c974392ff63f575fbe9f59dbb6a
SSDEEP 1536:f/6EkrKHqgGFs5N6s7H3dPT+X/O3DX6HZ9am1AEgHZ5bdpDvkDBlxZP1nc:fSKP3Pe/Oz67aKVgbbdpDcljZ9nc
TLSH
T14AC3BF527A6085F0E01645335397AB318771EC1E3A1813EE93C8FE0FBD65625ECBB299
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer upx

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 2 IoCs

resource	yara_rule
behavioral2/memory/1320-9-0x0000000010000000-0x0000000010030000-memory.dmp	family_farfli
behavioral2/memory/1320-10-0x0000000010000000-0x0000000010030000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/1320-9-0x0000000010000000-0x0000000010030000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1320-10-0x0000000010000000-0x0000000010030000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
7	1320	rundll32.exe
8	1320	rundll32.exe
9	1320	rundll32.exe
11	1320	rundll32.exe
12	1320	rundll32.exe
14	1320	rundll32.exe
15	1320	rundll32.exe
17	1320	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1960	gbcfuzqy.exe

Executes dropped EXE 1 IoCs

pid	Process
1960	gbcfuzqy.exe

Loads dropped DLL 1 IoCs

pid	Process
1320	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-1-5-21-4046655672-1449839301-2197395821-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\eezgs\\nlcgxhccy.dll\",QueryPluginInterface"	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)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	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)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\d:	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

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/948-0-0x0000000000400000-0x000000000041E000-memory.dmp	upx
behavioral2/memory/948-2-0x0000000000400000-0x000000000041E000-memory.dmp	upx
behavioral2/files/0x000500000000053e-3.dat	upx
behavioral2/memory/1960-6-0x0000000000400000-0x000000000041E000-memory.dmp	upx

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
2052	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	2026-08-21_817557e05b474c1b6d46ab5f82161ade_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	gbcfuzqy.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
2052	cmd.exe
4608	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
4608	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1320	rundll32.exe
1320	rundll32.exe
1320	rundll32.exe
1320	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1320	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
948	2026-08-21_817557e05b474c1b6d46ab5f82161ade_elex_wannacry.exe
1960	gbcfuzqy.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 948 wrote to memory of 2052	948	2026-08-21_817557e05b474c1b6d46ab5f82161ade_elex_wannacry.exe	89
PID 2052 wrote to memory of 4608	2052	cmd.exe	91
PID 2052 wrote to memory of 1960	2052	cmd.exe	92
PID 1960 wrote to memory of 1320	1960	gbcfuzqy.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-21_817557e05b474c1b6d46ab5f82161ade_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-21_817557e05b474c1b6d46ab5f82161ade_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:948
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\gbcfuzqy.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-21_817557e05b474c1b6d46ab5f82161ade_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:2052
- - 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:4608
- - C:\Users\Admin\AppData\Local\Temp\gbcfuzqy.exe
    C:\Users\Admin\AppData\Local\Temp\\gbcfuzqy.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-21_817557e05b474c1b6d46ab5f82161ade_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1960
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\eezgs\nlcgxhccy.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\gbcfuzqy.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:1320

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

gbcfuzqy.exe

Path C:\Users\Admin\AppData\Local\Temp\gbcfuzqy.exe
Size 123KB
SHA256 38c85022154f2f4939dac88440719101757ce40cbb50107f3a887e843d7ab9b7
MD5 15805167699b7b1259569351dbf619b0
SHA1 0a02715f978e57521f00fb14398a658be60543e6
SHA512 ba3f21c2ed988006c10259020fc0634f4216f54da74215160b017949aeb8dd495f66d75a89000a4a2e3fd9f5b0244087fe3fc2e32ced87e48c54bdb0c51895bd
SSDEEP 1536:f/6EkrKHqgGFs5N6s7H3dPT+X/O3DX6HZ9am1AEgHZ5bdpDvkDBlxZP1nX:fSKP3Pe/Oz67aKVgbbdpDcljZ9nX
TLSH
T1E0C3BF527A6085F0E01645335397AB318771EC1E3A1813EE93C8FE0FBD65625ECBB299
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nlcgxhccy.dll

Path \??\c:\eezgs\nlcgxhccy.dll
Size 59KB
SHA256 12264670242948b129acc4d9cd80cdf83fac88e662c09a57ce5ac6b39510618d
MD5 8552951ec6ab253e038ffc809235b08c
SHA1 c59e347bfebd96c0e4b60a0d33b5923fb137af55
SHA512 17864dfff89f397c647ec02926cfd639e33a05061cb6164756afd3d8c4e24281cba9c4770d16927ba56e1e02a139faf970748bfe07454f4528eab9f87e2c0cd9
SSDEEP 1536:x0u5H+DyujZ2uoHzCf/IYmRGMJnc7Z4ch:x04eDyY/oH8SIMJncNnh
TLSH
T12843F21CE351855BDAAB0672678F6F407A238A7F5B32485A914C2454BF3BE77C937380
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/948-0-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/948-2-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1320-9-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/1320-10-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/1960-6-0x0000000000400000-0x000000000041E000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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