farfli | ce343b4c8f6e00f884b004358cb11acfa4c7e0e35d1e12b808190e494d28b08b

General

Target
2026-10-22_abea1a25d53d7c8d38cc0d1d1517198e_elex_strictor_wannacry.exe
Size 126KB
Sample261024-bb9bfa1yaz
SHA256 ce343b4c8f6e00f884b004358cb11acfa4c7e0e35d1e12b808190e494d28b08b
MD5 abea1a25d53d7c8d38cc0d1d1517198e
SHA1 7f48c0fd4b392c7cd69cd99cdffa9069d0d29956
SHA512 cfdde2bc6caf6a40ddacdac2cc894625212e9e30691c333dcff7b9704243d645914ccc00d69e5edf49b322adfff56ea04991484a48439dbf0c40c13df833a8dc
SSDEEP 1536:QaaczXhtqkUlX/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJnddI3GMbB:la7qc9rqzMseNoVv9EJFdXMbB
TLSH
T1DAC3160263E6C184F1B20B34CA3646F04A7BBCA9F970926B17407E5EBD31A55ED21B77
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
behavioral1/memory/1248-8-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/1248-7-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/1248-9-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/1248-10-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/1248-7-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1248-9-0x0000000010000000-0x0000000010032000-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
10	1248	rundll32.exe
15	1248	rundll32.exe
16	1248	rundll32.exe
17	1248	rundll32.exe
30	1248	rundll32.exe
31	1248	rundll32.exe
34	1248	rundll32.exe
39	1248	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3464	fbcaqjdg.exe

Executes dropped EXE 1 IoCs

pid	Process
3464	fbcaqjdg.exe

Loads dropped DLL 1 IoCs

pid	Process
1248	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:\\kkzxk\\fzrxbfgx.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)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	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
2416	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-22_abea1a25d53d7c8d38cc0d1d1517198e_elex_strictor_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	fbcaqjdg.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
2940	PING.EXE
2416	cmd.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
2940	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1248	rundll32.exe
1248	rundll32.exe
1248	rundll32.exe
1248	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1248	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5340	2026-10-22_abea1a25d53d7c8d38cc0d1d1517198e_elex_strictor_wannacry.exe
3464	fbcaqjdg.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5340 wrote to memory of 2416	5340	2026-10-22_abea1a25d53d7c8d38cc0d1d1517198e_elex_strictor_wannacry.exe	85
PID 2416 wrote to memory of 2940	2416	cmd.exe	87
PID 2416 wrote to memory of 3464	2416	cmd.exe	88
PID 3464 wrote to memory of 1248	3464	fbcaqjdg.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-10-22_abea1a25d53d7c8d38cc0d1d1517198e_elex_strictor_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-22_abea1a25d53d7c8d38cc0d1d1517198e_elex_strictor_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5340
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\fbcaqjdg.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-22_abea1a25d53d7c8d38cc0d1d1517198e_elex_strictor_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:2416
- - 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:2940
- - \??\c:\fbcaqjdg.exe
    c:\fbcaqjdg.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-22_abea1a25d53d7c8d38cc0d1d1517198e_elex_strictor_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3464
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\kkzxk\fzrxbfgx.dll",init c:\fbcaqjdg.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:1248

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Indicator Removal

1

T1070

File Deletion

Modify Registry

Pre-OS Boot

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

fbcaqjdg.exe

Path C:\fbcaqjdg.exe
Size 127KB
SHA256 65a264fb2b6a0b74caadf90f8c0b83404f5bf422f2894b4e9194cb46a050ed8f
MD5 71c7f41c8ce7c7176beec8d9a5c81058
SHA1 ad9617f108cb0ea930b605d9eec1f74759bcf560
SHA512 60cbda18130104ee3498dafafa9031603d8bbdce09d05260ee588c5558e201fb1ea9350036bf046a3cc17642175934d40d16c03d786ba376f3b2ac4267505082
SSDEEP 1536:QaaczXhtqkUlX/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJnddI3GMbBy:la7qc9rqzMseNoVv9EJFdXMbBy
TLSH
T13AD3160263E6C184F1B20B34CA3646F04A7BBCA9F970926B17807E4EBD31A55ED21777
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fzrxbfgx.dll

Path \??\c:\kkzxk\fzrxbfgx.dll
Size 50KB
SHA256 a632527bcd457c9a4cfce83e7a9a675baff790b0279de5d8ea3192dfb2dd888a
MD5 ab32c5bfd7ecfbe9ed733dfb81210933
SHA1 4d5c6e7a0031691f12e78b096ff928b0d55bdfab
SHA512 59b971146292074d76d23d5f26889108f4d6e33804332449f4c589bf8a8d53e37ac8dfea47e9d3c5ae0f382ae1acf25c4968bea87b3f5ff9d51f2274229c1ab5
SSDEEP 1536:mrrG57ZqLLpf+Xz+HOtygmRnO/x5Rq8Gm:mwKGqutWM/x281
TLSH
T12033F1F4EFB4E067ECBA5F743E6A6215DA727B10C63188EA518090135F335CACA18717
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1248-8-0x0000000010001000-0x0000000010021000-memory.dmp

Download

memory/1248-7-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/1248-9-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/1248-10-0x0000000010001000-0x0000000010021000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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