farfli | 65f678b362cad3248ac4ac4be32424ef7d21bbd6c6203538d3cf7eb3ab8da603

Analysis

max time kernel
150s
max time network
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
12/11/2026, 23:37

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General

Target
2026-11-12_792e4242cd7b948980bdb5e95a2a579c_elex_wannacry.exe
Size 110KB
Sample261112-3l7n5sds91
SHA256 65f678b362cad3248ac4ac4be32424ef7d21bbd6c6203538d3cf7eb3ab8da603
MD5 792e4242cd7b948980bdb5e95a2a579c
SHA1 d7a71d6ce8d69323e12177fff3e2f1057778d9a4
SHA512 29d48e746a0f90caf94792fe337e2bd7eac5160dea885aa0b979018afcb3a97a665b8170567992abc661bbadc5ea998d47530f7118f25392d8501da43a1475b0
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4c:piAXaKDeKNnD36cb8tIc
TLSH
T121B39D42ABF0C6A5E0665DB5067717619EB2FC6B29348327B7C6B70EAC30F04EE25354
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion discovery execution farfli persistence spyware stealer

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 4 IoCs

resource	yara_rule
behavioral2/memory/4184-9-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/4184-10-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral2/memory/4184-11-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/4184-12-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4184-9-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4184-11-0x0000000010000000-0x000000001002E000-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
8	4184	rundll32.exe
9	4184	rundll32.exe
10	4184	rundll32.exe
12	4184	rundll32.exe
13	4184	rundll32.exe
15	4184	rundll32.exe
16	4184	rundll32.exe
18	4184	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
2280	dfwto.exe

Executes dropped EXE 1 IoCs

pid	Process
2280	dfwto.exe

Loads dropped DLL 1 IoCs

pid	Process
4184	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-1-5-21-53044966-3830981193-2402648431-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\uwboaqg\\cxpzd.dll\",GetWindowClass"	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)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\o:	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
5204	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	2026-11-12_792e4242cd7b948980bdb5e95a2a579c_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	dfwto.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
5204	cmd.exe
3132	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
3132	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4184	rundll32.exe
4184	rundll32.exe
4184	rundll32.exe
4184	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4184	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3704	2026-11-12_792e4242cd7b948980bdb5e95a2a579c_elex_wannacry.exe
2280	dfwto.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3704 wrote to memory of 5204	3704	2026-11-12_792e4242cd7b948980bdb5e95a2a579c_elex_wannacry.exe	89
PID 5204 wrote to memory of 3132	5204	cmd.exe	91
PID 5204 wrote to memory of 2280	5204	cmd.exe	92
PID 2280 wrote to memory of 4184	2280	dfwto.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-11-12_792e4242cd7b948980bdb5e95a2a579c_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-12_792e4242cd7b948980bdb5e95a2a579c_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3704
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\dfwto.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-12_792e4242cd7b948980bdb5e95a2a579c_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:5204
- - 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:3132
- - \??\c:\dfwto.exe
    c:\dfwto.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-12_792e4242cd7b948980bdb5e95a2a579c_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2280
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\uwboaqg\cxpzd.dll",GetWindowClass c:\dfwto.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:4184

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

dfwto.exe

Path \??\c:\dfwto.exe
Size 111KB
SHA256 19ce75dfbfba3781e97674962f4873b1d49c90acca8086617c020a045007e54d
MD5 77f59b057ad5b517186f3e54b7627d78
SHA1 a2d11ff0b79e863d9b205136f1899f192540b189
SHA512 2a2e374fac22176e610671fe7f06086319e741df395b5059dfd141d20e2c590b437ea2fe700dfa6303ebf6b12cefdb5547e4741b9f28f0e30a30040cbc7f0469
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4+:piAXaKDeKNnD36cb8tI+
TLSH
T112B39D02ABF0C7A5E0665DB5467717619EB2FC6A29348327B7C6B70EEC30F04EA25354
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

cxpzd.dll

Path \??\c:\uwboaqg\cxpzd.dll
Size 46KB
SHA256 f57f9e54f4774c2b944fb070ae0c2a02cbb4b7686ab3207544c3ccaff0ff3dd9
MD5 a3fd41430ddcaa55fde840788925406a
SHA1 dbdd87f5c1bbf6a6f44c2e2c4744675d5e4e75c2
SHA512 23109572cfc9a282ea3ec84d93bfe02303d27f365ad2d9f47f6234f91da14c64f80133cc5e49746dfcb65d2454b7e7c13eff59ba4bbc18e09d2fb1c630ba59c9
SSDEEP 768:2sUfnvxs6iLlhpfFPtnQf7kifD/v7yb9Bh7Cb0VQJojZC/xjTk:2sJT1qf4W/vub9nnV1jZC/xE
TLSH
T19D2302C8A6F08EF3D2F90B7980E046DCDCFDB939877381150566008E7C71057FA446AA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2280-6-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/3704-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/3704-2-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4184-9-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4184-10-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4184-11-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4184-12-0x0000000010001000-0x000000001001E000-memory.dmp

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