farfli | d6fcb0ca474bc69c0b46e0d8fcf985909abb1531c5815e4cae3923206727675f

Analysis

max time kernel
148s
max time network
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
15/07/2026, 09:12

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General

Target
2026-07-15_e25fec9855a90ce917d03b28c2783fc8_elex_wannacry.exe
Size 99KB
Sample260715-k56bbaf19q
SHA256 d6fcb0ca474bc69c0b46e0d8fcf985909abb1531c5815e4cae3923206727675f
MD5 e25fec9855a90ce917d03b28c2783fc8
SHA1 deee8521a21d6cf850f5403124ff8a4ff69f9721
SHA512 e18883246aeea0c80e46dc87ca8f14278e7af8d56cd4c0568ab9bf96f460e0245d6da25137060d83843b79e99a82849d6f09e085ffbae8f7aa80013bdd1f2311
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyr:uLRrO10TiJD9yjqrilyxOuPr
TLSH
T10EA37B1C6962C59EE4015F74434B962097A2AC19FA304F335384BA4EFF36E1BEDA91D8
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/872-11-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/872-13-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/872-14-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/872-11-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/872-13-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/872-14-0x0000000010000000-0x0000000010023000-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	872	rundll32.exe
3	872	rundll32.exe
4	872	rundll32.exe
6	872	rundll32.exe
7	872	rundll32.exe
9	872	rundll32.exe
10	872	rundll32.exe
11	872	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1316	irkim.exe

Executes dropped EXE 1 IoCs

pid	Process
1316	irkim.exe

Loads dropped DLL 1 IoCs

pid	Process
872	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-1-5-21-4046655672-1449839301-2197395821-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\pjxfacv\\cufxc.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)	\??\k:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\u:	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)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	irkim.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-15_e25fec9855a90ce917d03b28c2783fc8_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
4612	cmd.exe
1968	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
1968	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
872	rundll32.exe
872	rundll32.exe
872	rundll32.exe
872	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	872	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
836	2026-07-15_e25fec9855a90ce917d03b28c2783fc8_elex_wannacry.exe
1316	irkim.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 836 wrote to memory of 4612	836	2026-07-15_e25fec9855a90ce917d03b28c2783fc8_elex_wannacry.exe	87
PID 4612 wrote to memory of 1968	4612	cmd.exe	89
PID 4612 wrote to memory of 1316	4612	cmd.exe	90
PID 1316 wrote to memory of 872	1316	irkim.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-07-15_e25fec9855a90ce917d03b28c2783fc8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-15_e25fec9855a90ce917d03b28c2783fc8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:836
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\irkim.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-15_e25fec9855a90ce917d03b28c2783fc8_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4612
- - 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:1968
- - C:\Users\Admin\AppData\Local\Temp\irkim.exe
    C:\Users\Admin\AppData\Local\Temp\\irkim.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-15_e25fec9855a90ce917d03b28c2783fc8_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1316
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\pjxfacv\cufxc.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\irkim.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:872

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

irkim.exe

Path C:\Users\Admin\AppData\Local\Temp\irkim.exe
Size 99KB
SHA256 9e6481874b7791e3ce14cbd5e13477dbe815416a76a4164a5d245ae3f8a1ec77
MD5 6c22d363a98fddf5329b65c1adfdf8a5
SHA1 75a4c87cf85bb63c175852018329edc6ea446702
SHA512 58b75e07abc3a86dd3f416286cb859cb2b12aabdd0d865d8ece36157053573df78191b6dae89ca072738458289c98f4fb2433b0f470e9668981baa6bbd5ca12c
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmy+:uLRrO10TiJD9yjqrilyxOuP+
TLSH
T1D8A37B1C6962C59EE4015F74434B962096A2AC1DFA304F335384BA4EFF36E1BEDA91D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

cufxc.dll

Path \??\c:\pjxfacv\cufxc.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/836-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/836-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/872-9-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/872-10-0x00000000026A0000-0x00000000026A2000-memory.dmp

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memory/872-11-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/872-13-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/872-14-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1316-6-0x0000000000400000-0x0000000000417000-memory.dmp

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