farfli | 165fbdff41e6bbd2a5be017fa85a06386aa03b9d77cda28e3a07bd512d2dad4f

Analysis

max time kernel
150s
max time network
146s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260629-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
05/07/2026, 04:42

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General

Target
2026-07-05_f43d8730ce2b8f2b070d7e4a5dda3e1a_elex_wannacry.exe
Size 112KB
Sample260705-fbqasac19j
SHA256 165fbdff41e6bbd2a5be017fa85a06386aa03b9d77cda28e3a07bd512d2dad4f
MD5 f43d8730ce2b8f2b070d7e4a5dda3e1a
SHA1 dbc6d3cb3dae4fd42bb047f7e39eb70f650e31c4
SHA512 5dbaf2d5f513baba74da409ef319d4f6afd3ace70164a5b8fc6862018372a1e4b32b217032daf755a268b4ff0442485e6f24701d46aaa2f54d80acc305c97747
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmyyF:ELRrO10TiJD9yjqrilyxOWPy
TLSH
T125B3AD5D6D62C59EE4015B7043579721A2A2AC5DFA304F334380BA4EFF36E0BEDE9198
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
behavioral2/memory/1340-11-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/1340-13-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/1340-14-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/1340-11-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1340-13-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1340-14-0x0000000010000000-0x0000000010023000-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	1340	rundll32.exe
3	1340	rundll32.exe
4	1340	rundll32.exe
5	1340	rundll32.exe
7	1340	rundll32.exe
8	1340	rundll32.exe
10	1340	rundll32.exe
11	1340	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1508	hbvbukzv.exe

Executes dropped EXE 1 IoCs

pid	Process
1508	hbvbukzv.exe

Loads dropped DLL 1 IoCs

pid	Process
1340	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-1-5-21-3047816590-610495838-277027736-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\nnvvz\\ohboo.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)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	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	2026-07-05_f43d8730ce2b8f2b070d7e4a5dda3e1a_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	hbvbukzv.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
3268	cmd.exe
3424	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
3424	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1340	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5692	2026-07-05_f43d8730ce2b8f2b070d7e4a5dda3e1a_elex_wannacry.exe
1508	hbvbukzv.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5692 wrote to memory of 3268	5692	2026-07-05_f43d8730ce2b8f2b070d7e4a5dda3e1a_elex_wannacry.exe	88
PID 3268 wrote to memory of 3424	3268	cmd.exe	90
PID 3268 wrote to memory of 1508	3268	cmd.exe	91
PID 1508 wrote to memory of 1340	1508	hbvbukzv.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-07-05_f43d8730ce2b8f2b070d7e4a5dda3e1a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-05_f43d8730ce2b8f2b070d7e4a5dda3e1a_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5692
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\hbvbukzv.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-05_f43d8730ce2b8f2b070d7e4a5dda3e1a_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3268
- - 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:3424
- - C:\Users\Admin\AppData\Local\Temp\hbvbukzv.exe
    C:\Users\Admin\AppData\Local\Temp\\hbvbukzv.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-05_f43d8730ce2b8f2b070d7e4a5dda3e1a_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1508
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\nnvvz\ohboo.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\hbvbukzv.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:1340

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

hbvbukzv.exe

Path C:\Users\Admin\AppData\Local\Temp\hbvbukzv.exe
Size 112KB
SHA256 e85a859162af9704de61e0591dc872dc922c7a0555ef14865a7c760c7e3e688b
MD5 708ddea438062095b8472fa636110ca9
SHA1 9c9957b5e2a38d2999bd095f6a3d3255c11f13f4
SHA512 bf80324ec41bb9c236c426d1b7ef63cd4233a940327878a0b927907471d9c29d0dee117f5da4947c09ff584f3e8bb0d68d85e12da72fdd5b392aa8284cdb76af
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmyyFp:ELRrO10TiJD9yjqrilyxOWPyX
TLSH
T19FB39D5D6D62C59EE4015B7043579721A2A2AC5DFA304F334380BA4EFF36E0BEDE9198
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ohboo.dll

Path \??\c:\nnvvz\ohboo.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/1340-9-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1340-10-0x0000000002A90000-0x0000000002A92000-memory.dmp

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memory/1340-11-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1340-13-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1340-14-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1508-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5692-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5692-2-0x0000000000400000-0x0000000000417000-memory.dmp

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