farfli | 239bc4627ab13cddfa3249f83c0fa9597c1318be6a225c6e9f3cc45034b5d4ca

Analysis

max time kernel
149s
max time network
135s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
25/10/2026, 04:30

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General

Target
2026-10-24_e2035bcfabdd73d396617b69995cd61f_elex_wannacry.exe
Size 95KB
Sample261025-e476matw2p
SHA256 239bc4627ab13cddfa3249f83c0fa9597c1318be6a225c6e9f3cc45034b5d4ca
MD5 e2035bcfabdd73d396617b69995cd61f
SHA1 6ff215f9ea386ed1ddff6ea5f6fa4356381cf0e5
SHA512 f90e4d04dab232ebff1f87f8ad6b6e5c0e7118effd85e76e77cbb3adc2f8f36a150daef0fc02469fefc97ccc689fc990e844e2a31eabee2237a1a94b40b0530f
SSDEEP 1536:SaK4RNx6nb4RoIw/vvBSxXsral6x2aE0zLve2yESXGTBcvt8UaKW40AEEoL:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvu
TLSH
T12293BF47ABA50DE5E1214DF001AB7B36537694992B21A797C384DE0DA43EEC0DF362CE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion 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 5 IoCs

resource	yara_rule
behavioral1/memory/5720-11-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral1/memory/5720-13-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral1/memory/5720-14-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral1/memory/5720-15-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral1/memory/5720-16-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral1/memory/5720-11-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5720-13-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5720-14-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5720-15-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5720-16-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 8 IoCs

resource	yara_rule
behavioral1/memory/2364-7-0x0000000000400000-0x0000000000417000-memory.dmp	UPX
behavioral1/files/0x0008000000024662-8.dat	UPX
behavioral1/memory/5720-10-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral1/memory/5720-11-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral1/memory/5720-13-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral1/memory/5720-14-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral1/memory/5720-15-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral1/memory/5720-16-0x0000000010000000-0x0000000010024000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
10	5720	rundll32.exe
15	5720	rundll32.exe
16	5720	rundll32.exe
17	5720	rundll32.exe
30	5720	rundll32.exe
31	5720	rundll32.exe
36	5720	rundll32.exe
40	5720	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x0008000000024662-8.dat	acprotect

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
2364	bqzosxgo.exe

Executes dropped EXE 1 IoCs

pid	Process
2364	bqzosxgo.exe

Loads dropped DLL 1 IoCs

pid	Process
5720	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-1-5-21-2091445952-3649787497-104050984-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\bnquj\\obwlz.dll\",init"	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)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	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)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	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 7 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0008000000024662-8.dat	upx
behavioral1/memory/5720-10-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral1/memory/5720-11-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral1/memory/5720-13-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral1/memory/5720-14-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral1/memory/5720-15-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral1/memory/5720-16-0x0000000010000000-0x0000000010024000-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
5896	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	rundll32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bqzosxgo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-24_e2035bcfabdd73d396617b69995cd61f_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
5896	cmd.exe
6096	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
6096	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5720	rundll32.exe
5720	rundll32.exe
5720	rundll32.exe
5720	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5720	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
6132	2026-10-24_e2035bcfabdd73d396617b69995cd61f_elex_wannacry.exe
2364	bqzosxgo.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 6132 wrote to memory of 5896	6132	2026-10-24_e2035bcfabdd73d396617b69995cd61f_elex_wannacry.exe	84
PID 5896 wrote to memory of 6096	5896	cmd.exe	86
PID 5896 wrote to memory of 2364	5896	cmd.exe	87
PID 2364 wrote to memory of 5720	2364	bqzosxgo.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-10-24_e2035bcfabdd73d396617b69995cd61f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-24_e2035bcfabdd73d396617b69995cd61f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:6132
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\bqzosxgo.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-24_e2035bcfabdd73d396617b69995cd61f_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:5896
- - 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:6096
- - \??\c:\bqzosxgo.exe
    c:\bqzosxgo.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-24_e2035bcfabdd73d396617b69995cd61f_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2364
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\bnquj\obwlz.dll",init c:\bqzosxgo.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)
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5720

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

Indicator Removal

T1070

File Deletion

T1070.004

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

Replay Monitor

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Downloads

obwlz.dll

Path \??\c:\bnquj\obwlz.dll
Size 46KB
SHA256 b6bc7902da0250f6ca920b35b222f6a0fe62102caf05d2a1722c4d3b225a0a9e
MD5 42fe886bcb6460f7c2a46e21ecac5da6
SHA1 7d9a1c9fe17121cf61444da965f29e974a95ede2
SHA512 3d1a7dc1d9ca8a4376302ba20df584ad59b98e0d3b18b06b22d7f5a455833ce124e412fc1922a3b704dcbafa31987cda3115c9a71dd6299683502cebae33567c
SSDEEP 768:P60NIyOvlPSGxZ00FBsMT0fdB5h3vU7ExCClpoduUglNgLoR/C:P6e4lP5rvz1Vd8H/C
TLSH
T10023F15733A8577BC9E621FA3263BE142B357019CB3A83545CB9B6572C21C8D927930F
MD5 SHA1 SHA512 SSDEEP TLSH

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bqzosxgo.exe

Path \??\c:\bqzosxgo.exe
Size 95KB
SHA256 08d7837923d12d5c5a8ad4cef9c5ebbb24e5cc471d1009934d3ced59d98fae1c
MD5 09771a2eaa0093f8dd50a4623bc9753f
SHA1 46f550410a5532c715ad9d0f92874258d421ede2
SHA512 d9424206c549fdf440b1003fc11c44d32b08f6b9ed3071669cfec584027f140d2498b387e9a92c40e97c80e03649c5f0673b83a838be69db02084694f6dcc430
SSDEEP 1536:SaK4RNx6nb4RoIw/vvBSxXsral6x2aE0zLve2yESXGTBcvt8UaKW40AEEop:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvS
TLSH
T1C193BF47ABA50DE5E1214DF001AB7B36537694992B21A797C384DE0DA43EEC0DF362CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2364-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5720-10-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5720-11-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5720-13-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5720-14-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5720-15-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/5720-16-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/6132-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/6132-2-0x0000000000400000-0x0000000000417000-memory.dmp

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