farfli | 720f38fe5142bf7ffdf409923121fdc6d92d24498a3096b8f40a580e1c1cd630

Analysis

max time kernel
149s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
05/06/2026, 22:21

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General

Target
2026-06-05_62e30ac1090f4218929fefc0a29cc58f_elex_wannacry.exe
Size 95KB
Sample260605-19raysfw9l
SHA256 720f38fe5142bf7ffdf409923121fdc6d92d24498a3096b8f40a580e1c1cd630
MD5 62e30ac1090f4218929fefc0a29cc58f
SHA1 3cc9b5f8a0cea4c9e314506c8f6cc6289e74f07e
SHA512 4ad7c6613ae47a3f7ebc07f6895d192594d29d23a8f1ec5a7d75432b9393bf459b81d09daedb6bfe17084815b3cdf96894c775268e7c748676b6f0181e1bd28b
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmy7:uLRrO10TiJD9yjqrilyxOuP7
TLSH
T163939D1C6D62C59EE4054B7443479721A6A2AC59FA304F334380BA4EFF36E1BEDE91D8
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
behavioral2/memory/3548-12-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/3548-15-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/3548-12-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3548-15-0x0000000010000000-0x0000000010023000-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
2	3548	rundll32.exe
3	3548	rundll32.exe
4	3548	rundll32.exe
5	3548	rundll32.exe
6	3548	rundll32.exe
8	3548	rundll32.exe
10	3548	rundll32.exe
11	3548	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3920	nlvxy.exe

Executes dropped EXE 1 IoCs

pid	Process
3920	nlvxy.exe

Loads dropped DLL 1 IoCs

pid	Process
3548	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-1-5-21-1679180529-4058988202-686829476-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\fohex\\aivmv.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)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	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

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	nlvxy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-06-05_62e30ac1090f4218929fefc0a29cc58f_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
1288	cmd.exe
404	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
404	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3548	rundll32.exe
3548	rundll32.exe
3548	rundll32.exe
3548	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3548	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2076	2026-06-05_62e30ac1090f4218929fefc0a29cc58f_elex_wannacry.exe
3920	nlvxy.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 1288	2076	2026-06-05_62e30ac1090f4218929fefc0a29cc58f_elex_wannacry.exe	82
PID 1288 wrote to memory of 404	1288	cmd.exe	84
PID 1288 wrote to memory of 3920	1288	cmd.exe	85
PID 3920 wrote to memory of 3548	3920	nlvxy.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-06-05_62e30ac1090f4218929fefc0a29cc58f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-05_62e30ac1090f4218929fefc0a29cc58f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\nlvxy.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-05_62e30ac1090f4218929fefc0a29cc58f_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1288
- - 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:404
- - C:\Users\Admin\AppData\Local\Temp\nlvxy.exe
    C:\Users\Admin\AppData\Local\Temp\\nlvxy.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-05_62e30ac1090f4218929fefc0a29cc58f_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3920
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\fohex\aivmv.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\nlvxy.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:3548

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

nlvxy.exe

Path C:\Users\Admin\AppData\Local\Temp\nlvxy.exe
Size 95KB
SHA256 779af27ef866c21621df0fcd77f16660b5673fa6838d4b1c48d8a2a32fea6296
MD5 9e6498bd13773e90057b3829e7a6d77f
SHA1 9ef13f5ff158514c9a895fb484d193fab9a9e0e0
SHA512 51f1336b2a7d8059e53a63eb5408a36602b5cb6a17a49a4b773bf49b77f0c303ab5a37de80e38a0d7f28a562b741213733eb612771d66c3d60c0422283ef7861
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyO:uLRrO10TiJD9yjqrilyxOuPO
TLSH
T17F939C1C6D62C59EE4054B7443479721A6A2AC59FA304F334380BA4EFF36E1BEDE91D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

aivmv.dll

Path \??\c:\fohex\aivmv.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/2076-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2076-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3548-10-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/3548-11-0x0000000001510000-0x0000000001512000-memory.dmp

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memory/3548-13-0x0000000001510000-0x0000000001512000-memory.dmp

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memory/3548-12-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/3548-15-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/3920-7-0x0000000000400000-0x0000000000417000-memory.dmp

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