farfli | ea5b614a04b25d15a16f4693cae021afb386e21979f79546c1ab389327b96f6e

Analysis

max time kernel
148s
max time network
136s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
26/10/2026, 03:49

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General

Target
2026-10-26_49a581b9b84f7b0a39073afabbd2b92d_elex_wannacry.exe
Size 382KB
Sample261026-edg7hsvsfz
SHA256 ea5b614a04b25d15a16f4693cae021afb386e21979f79546c1ab389327b96f6e
MD5 49a581b9b84f7b0a39073afabbd2b92d
SHA1 36c33beaa9a90dbacbbc552f36dd4fac1aa15bdd
SHA512 a282763c10c9ff05bd23ae22ede9db90cb6dceb7dc435350e3a818ffe17d8b688e8dd46a205b911d3d8a935bd392b89d5fe1fb92735dbf01e50c9de4e517d260
SSDEEP 6144:54yA9i7ZanCjRDWqCEdK40LUT4AxFa7abls3oW:i7i1TjRDdZdVT4AxFauba3h
TLSH
T109847AC057F9C205F2BE2F75DAB9B6F44A29BD55EE34E58F12843C1DB870A919830326
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 2 IoCs

resource	yara_rule
behavioral2/memory/6140-11-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli
behavioral2/memory/6140-13-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/6140-11-0x0000000010000000-0x0000000010054000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/6140-13-0x0000000010000000-0x0000000010054000-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
7	6140	rundll32.exe
9	6140	rundll32.exe
10	6140	rundll32.exe
11	6140	rundll32.exe
12	6140	rundll32.exe
13	6140	rundll32.exe
16	6140	rundll32.exe
17	6140	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3416	zktml.exe

Executes dropped EXE 1 IoCs

pid	Process
3416	zktml.exe

Loads dropped DLL 1 IoCs

pid	Process
6140	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-1-5-21-1404337215-1550464601-2805570857-1000\Software\Microsoft\Windows\CurrentVersion\Run\HDTunePro = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\mpfrn\\dxdjlax.dll\",GetCpu"	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	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)	\??\t:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	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

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\mpfrn	zktml.exe
File created	\??\c:\Program Files\mpfrn\dxdjlax.dll	zktml.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
5160	cmd.exe

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

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	zktml.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-26_49a581b9b84f7b0a39073afabbd2b92d_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
5160	cmd.exe
3196	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
3196	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
6140	rundll32.exe
6140	rundll32.exe
6140	rundll32.exe
6140	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	6140	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3752	2026-10-26_49a581b9b84f7b0a39073afabbd2b92d_elex_wannacry.exe
3416	zktml.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3752 wrote to memory of 5160	3752	2026-10-26_49a581b9b84f7b0a39073afabbd2b92d_elex_wannacry.exe	89
PID 5160 wrote to memory of 3196	5160	cmd.exe	91
PID 5160 wrote to memory of 3416	5160	cmd.exe	92
PID 3416 wrote to memory of 6140	3416	zktml.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-10-26_49a581b9b84f7b0a39073afabbd2b92d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-26_49a581b9b84f7b0a39073afabbd2b92d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3752
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\zktml.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-26_49a581b9b84f7b0a39073afabbd2b92d_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:5160
- - 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:3196
- - C:\Users\Admin\AppData\Local\Temp\zktml.exe
    C:\Users\Admin\AppData\Local\Temp\\zktml.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-26_49a581b9b84f7b0a39073afabbd2b92d_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3416
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\mpfrn\dxdjlax.dll",GetCpu C:\Users\Admin\AppData\Local\Temp\zktml.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:6140

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

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Downloads

zktml.exe

Path C:\Users\Admin\AppData\Local\Temp\zktml.exe
Size 382KB
SHA256 b66d701cd7f6d1c2f47b0de0711171469b454bd034faa219e2465805da97c86a
MD5 f5116c9ba1d33b0fe113f651478d6ed4
SHA1 2d887b8be8b5afc8538f4f090760b06571ff076d
SHA512 7d1f51b9aad28610487a862afc5d89c8452471d3959a30f8ed6e699ae1a1603f1d5f87e47d0772eebb5501a8b2b02433b1fd6e0878f85ba40111cde90393015a
SSDEEP 6144:54yA9i7ZanCjRDWqCEdK40LUT4AxFa7abls3oz:i7i1TjRDdZdVT4AxFauba3W
TLSH
T149847AC057F9C205F2BE2F75DAB976F44A29BD55EE34E58F12843C1DB870A919830326
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

dxdjlax.dll

Path \??\c:\Program Files\mpfrn\dxdjlax.dll
Size 144KB
SHA256 39a41803330779efe18cb066f8ca682c1bb9a374275fccda5d5334cc33581e88
MD5 c16a3c8277e12c9b7777974a9bba2f5f
SHA1 203691f5369598f577723fb5d374fd2888e0a7b1
SHA512 d34fcd8adb3ac2599993aaae457b5427e681d630a8c99f39371c0b8af6e49e661d95a8fd18e8ac24a858de6291b6b648e48c8ae43aa8ec4cc4817f9e567616d2
SSDEEP 3072:9FSwhKDdKtTZVdOEaoxVDYn10zGJP4eLhSco/fWoB7re9Z9Idl8v4qClISS:awhKDaZfFTxV8nXgesN/OpLcl8v4qwI7
TLSH
T136E302E2215AD2B3F4BE177D9C57050EF9BD10009BB98A5B57C0781A2C1AA36E93D373
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3416-6-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/3752-0-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/3752-2-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/6140-11-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/6140-10-0x000000001004E000-0x000000001004F000-memory.dmp

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memory/6140-9-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/6140-13-0x0000000010000000-0x0000000010054000-memory.dmp

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