farfli | bf2c42e2c3d65f098dfe1ecc6fed2bff26e8a44165ac8a86a5e0e1f92c7368e3

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
08/07/2026, 04:26

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General

Target
2026-07-08_849e1c690b9a0421975d36132142152b_elex_wannacry.exe
Size 101KB
Sample260708-e2rqvsbv8q
SHA256 bf2c42e2c3d65f098dfe1ecc6fed2bff26e8a44165ac8a86a5e0e1f92c7368e3
MD5 849e1c690b9a0421975d36132142152b
SHA1 f6703a77569097abbdfe25a37a0fcfe4580c1ab7
SHA512 3e088ec8b7fe43d864fb0044f84a9a61e0825b2db671d8a429fb890f62aacc7f9843992d35f5ffceb0c1285ec3383c5bc1cfc071101985eabdb76457b61ff7c0
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmy2:uLRrO10TiJD9yjqrilyxOuP2
TLSH
T169A37C1C6962C59EE4015F74434B962096A2AC19FA304F335384BB4EFF36E1BEDA91D8
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
behavioral1/memory/1872-12-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral1/memory/1872-15-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral1/memory/1872-16-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/1872-12-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1872-15-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1872-16-0x0000000010000000-0x0000000010023000-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
12	1872	rundll32.exe
13	1872	rundll32.exe
14	1872	rundll32.exe
17	1872	rundll32.exe
25	1872	rundll32.exe
41	1872	rundll32.exe
46	1872	rundll32.exe
49	1872	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2776	bcjey.exe

Executes dropped EXE 1 IoCs

pid	Process
2776	bcjey.exe

Loads dropped DLL 1 IoCs

pid	Process
1872	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:\\pjyhz\\ynvcd.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)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\k:	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

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	2026-07-08_849e1c690b9a0421975d36132142152b_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	bcjey.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
2260	cmd.exe
3820	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
3820	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1872	rundll32.exe
1872	rundll32.exe
1872	rundll32.exe
1872	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1872	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3608	2026-07-08_849e1c690b9a0421975d36132142152b_elex_wannacry.exe
2776	bcjey.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3608 wrote to memory of 2260	3608	2026-07-08_849e1c690b9a0421975d36132142152b_elex_wannacry.exe	84
PID 2260 wrote to memory of 3820	2260	cmd.exe	86
PID 2260 wrote to memory of 2776	2260	cmd.exe	87
PID 2776 wrote to memory of 1872	2776	bcjey.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-07-08_849e1c690b9a0421975d36132142152b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-08_849e1c690b9a0421975d36132142152b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3608
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\bcjey.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-08_849e1c690b9a0421975d36132142152b_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2260
- - 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:3820
- - C:\Users\Admin\AppData\Local\Temp\bcjey.exe
    C:\Users\Admin\AppData\Local\Temp\\bcjey.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-08_849e1c690b9a0421975d36132142152b_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2776
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\pjyhz\ynvcd.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\bcjey.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:1872

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

bcjey.exe

Path C:\Users\Admin\AppData\Local\Temp\bcjey.exe
Size 101KB
SHA256 a0f279d8d9f8e8b8958dc946d3e636c5c2fb8796f070ec313daecdf4ca3401cb
MD5 73d6a5fd17da732bedb7d663991a5cc7
SHA1 fd6939fdfeda77849c89a1f2e32ee2a66bed4362
SHA512 e8850a6fb44cc56f736b5f85a705d940c4b74d7df2c0a5b377740fb13561536df6c155a3ff7f32d4c82c2b62b176fcb784c72774096c9ba466bc85131c7eaf8a
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyr:uLRrO10TiJD9yjqrilyxOuPr
TLSH
T153A37C1C6962C59EE4015F74430B962097A2AC19FA344F335384BB4EFF36E1BEDA91D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ynvcd.dll

Path \??\c:\pjyhz\ynvcd.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/1872-10-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1872-11-0x0000000000EF0000-0x0000000000EF2000-memory.dmp

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memory/1872-12-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1872-13-0x0000000000EF0000-0x0000000000EF2000-memory.dmp

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memory/1872-15-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1872-16-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/2776-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3608-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3608-2-0x0000000000400000-0x0000000000417000-memory.dmp

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