farfli | 6c7e8f3d828ebac486b17d0da16c0294b00aafbfd35a7f0364c6e6e7abc9fd07

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
02/08/2026, 02:42

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General

Target
2026-08-02_b7bf6dabb5d56ce091f594b7f8ae72d4_elex_wannacry.exe
Size 113KB
Sample260802-c66dpsbr8z
SHA256 6c7e8f3d828ebac486b17d0da16c0294b00aafbfd35a7f0364c6e6e7abc9fd07
MD5 b7bf6dabb5d56ce091f594b7f8ae72d4
SHA1 e97b08e58e4fb636961b8d471a8ca90117478b1f
SHA512 2f7e65bfae026cb30a1f7abf7d262118d2dcf19efa27b74f1cfea55cfdc22006ae00f0b2b988c578284af57c6395a1523550037499f8305fe9f1157b099f3379
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmyyF0:ELRrO10TiJD9yjqrilyxOWPyO
TLSH
T10CB39E5D6D62C59ED4015B7043579721A2A2AC5EFA304F334380BA4EFF36E0BEDE9198
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
behavioral1/memory/4000-12-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral1/memory/4000-15-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral1/memory/4000-16-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/4000-12-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4000-15-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4000-16-0x0000000010000000-0x0000000010023000-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
6	4000	rundll32.exe
7	4000	rundll32.exe
8	4000	rundll32.exe
23	4000	rundll32.exe
34	4000	rundll32.exe
36	4000	rundll32.exe
47	4000	rundll32.exe
49	4000	rundll32.exe

Deletes itself 1 IoCs

pid	Process
436	emtnf.exe

Executes dropped EXE 1 IoCs

pid	Process
436	emtnf.exe

Loads dropped DLL 1 IoCs

pid	Process
4000	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-1-5-21-540052884-2969440504-464782435-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\drbtqtfv\\lchyc.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)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\u:	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)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	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

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
560	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	2026-08-02_b7bf6dabb5d56ce091f594b7f8ae72d4_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	emtnf.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
560	cmd.exe
4320	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4320	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4000	rundll32.exe
4000	rundll32.exe
4000	rundll32.exe
4000	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4000	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4304	2026-08-02_b7bf6dabb5d56ce091f594b7f8ae72d4_elex_wannacry.exe
436	emtnf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4304 wrote to memory of 560	4304	2026-08-02_b7bf6dabb5d56ce091f594b7f8ae72d4_elex_wannacry.exe	84
PID 560 wrote to memory of 4320	560	cmd.exe	86
PID 560 wrote to memory of 436	560	cmd.exe	87
PID 436 wrote to memory of 4000	436	emtnf.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-08-02_b7bf6dabb5d56ce091f594b7f8ae72d4_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-02_b7bf6dabb5d56ce091f594b7f8ae72d4_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4304
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\emtnf.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-02_b7bf6dabb5d56ce091f594b7f8ae72d4_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:560
- - 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:4320
- - C:\Users\Admin\AppData\Local\Temp\emtnf.exe
    C:\Users\Admin\AppData\Local\Temp\\emtnf.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-02_b7bf6dabb5d56ce091f594b7f8ae72d4_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:436
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\drbtqtfv\lchyc.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\emtnf.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:4000

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

emtnf.exe

Path C:\Users\Admin\AppData\Local\Temp\emtnf.exe
Size 113KB
SHA256 8b56f4c8e7d2b1bcac238061ae97877b104ca0fd68e556c9803507ad86a75579
MD5 90151411b07cb884b038aec53c559c7c
SHA1 4aa0c1b313663f8fddbefb23542e060e48b55641
SHA512 d021144d060761455c1be720763b9ca622fb2364733aa7bbe4cef8795b786a791fa5200bc542c6d9e3fe0c8b6998355e066fb84475fdbcb3c8c5b84d61476ddb
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmyyFQ:ELRrO10TiJD9yjqrilyxOWPyK
TLSH
T1F0B39E5D6D62C59EE4015B7043579721A2A2AC5DFA304F334380BA4EFF36E0BEDE9198
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

lchyc.dll

Path \??\c:\drbtqtfv\lchyc.dll
Size 44KB
SHA256 9111c1eb1f0b59dcd49cfd5a0abc0ba100ac59a3bcae8623ff091dfdc46fed3c
MD5 0f12a7d509b2c9bb9b4cd6d8a0325e86
SHA1 f5fb59ad4f0633d115b06f35a2dc161dc4367157
SHA512 e3c84a643ff0a2627daba8a056221985a472aaf07bade61b3e9459db4bfc8792c1347606911e3fcc01581508004b18b5435bcccd5e7617cc6d091f37a5f42e7f
SSDEEP 768:DICzePjle2367kjhrXLdCuYMW8QVnwrLDGe/brbtJyOTuXfADVjeJ2i/MVJWAE:DDePjA23Ukjh37YMonwrvGybrbbRCf4E
TLSH
T1FD23F1A7B94E8D4FC0AE41F7078FC8D422B5589A97A7CB4626008F216CC4FB07E52376
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/436-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4000-10-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4000-11-0x0000000000B70000-0x0000000000B72000-memory.dmp

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memory/4000-13-0x0000000000B70000-0x0000000000B72000-memory.dmp

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memory/4000-12-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4000-15-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4000-16-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4304-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4304-2-0x0000000000400000-0x0000000000417000-memory.dmp

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