farfli | 0bd629f351ed133dc0d0f882122faaa9379d27d1cd5631f7338183cb9240eb24

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
23/10/2026, 01:49

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General

Target
2026-10-22_f67246f3f3709fe510bb6f715d1c6464_elex_wannacry.exe
Size 380KB
Sample261023-b86ltag171
SHA256 0bd629f351ed133dc0d0f882122faaa9379d27d1cd5631f7338183cb9240eb24
MD5 f67246f3f3709fe510bb6f715d1c6464
SHA1 1f635671bb3925aaf9e78c25b80e0200079c3b68
SHA512 8beca657aefde352973e1f9868708ba3e710044a362816ed14f5fcbe888984295ff9c72abadc2ef59ec25426c89cdfe3f2e4f0d1a49c6da0d4bcdd9c5e37966f
SSDEEP 6144:54yA9i7ZanCjRDWqCEdK40LUT4AxFa7abls3o:i7i1TjRDdZdVT4AxFauba3
TLSH
T1AD848AC067F9C605F2BE2F75DAB976F44A29BD95EE34E58F12403C1DB870A919830326
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/3252-10-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli
behavioral2/memory/3252-13-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/3252-10-0x0000000010000000-0x0000000010054000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3252-13-0x0000000010000000-0x0000000010054000-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	3252	rundll32.exe
9	3252	rundll32.exe
10	3252	rundll32.exe
11	3252	rundll32.exe
12	3252	rundll32.exe
13	3252	rundll32.exe
16	3252	rundll32.exe
17	3252	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4364	ubsoi.exe

Executes dropped EXE 1 IoCs

pid	Process
4364	ubsoi.exe

Loads dropped DLL 1 IoCs

pid	Process
3252	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-1-5-21-4280978039-528710165-233981602-1000\Software\Microsoft\Windows\CurrentVersion\Run\HDTunePro = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\cggnk\\jmgtwyfi.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)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	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)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
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)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\q:	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)	\??\y:	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\cggnk	ubsoi.exe
File created	\??\c:\Program Files\cggnk\jmgtwyfi.dll	ubsoi.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
5244	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-22_f67246f3f3709fe510bb6f715d1c6464_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	ubsoi.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
5244	cmd.exe
4124	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
4124	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3252	rundll32.exe
3252	rundll32.exe
3252	rundll32.exe
3252	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3252	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
6016	2026-10-22_f67246f3f3709fe510bb6f715d1c6464_elex_wannacry.exe
4364	ubsoi.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 6016 wrote to memory of 5244	6016	2026-10-22_f67246f3f3709fe510bb6f715d1c6464_elex_wannacry.exe	89
PID 5244 wrote to memory of 4124	5244	cmd.exe	91
PID 5244 wrote to memory of 4364	5244	cmd.exe	92
PID 4364 wrote to memory of 3252	4364	ubsoi.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-10-22_f67246f3f3709fe510bb6f715d1c6464_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-22_f67246f3f3709fe510bb6f715d1c6464_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:6016
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ubsoi.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-22_f67246f3f3709fe510bb6f715d1c6464_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:5244
- - 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:4124
- - C:\Users\Admin\AppData\Local\Temp\ubsoi.exe
    C:\Users\Admin\AppData\Local\Temp\\ubsoi.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-22_f67246f3f3709fe510bb6f715d1c6464_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:4364
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\cggnk\jmgtwyfi.dll",GetCpu C:\Users\Admin\AppData\Local\Temp\ubsoi.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:3252

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

ubsoi.exe

Path C:\Users\Admin\AppData\Local\Temp\ubsoi.exe
Size 381KB
SHA256 d9e12db85640b4d7b8743926921feb282bc0cc450082903672b88d117b931b03
MD5 c4a1727194fbddcd7e51c69a8507d681
SHA1 1d54ffa90de003b37f0c82433d4a060906566f8f
SHA512 61e13b0c8fc0af8f7ed6122252f21f6b70622b45aa43060fafdfa222e6227342cb3ebebf6603d0cc9dbdd0343ba70d991d49694a7079f36d67d154bb29824f4e
SSDEEP 6144:54yA9i7ZanCjRDWqCEdK40LUT4AxFa7abls3oJ:i7i1TjRDdZdVT4AxFauba3s
TLSH
T119847AC057F9C205F2BF2F75DAB976F44A29BD95EE34E58F52403C1DB870A919820326
MD5 SHA1 SHA512 SSDEEP TLSH

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jmgtwyfi.dll

Path \??\c:\Program Files\cggnk\jmgtwyfi.dll
Size 144KB
SHA256 c6aa05eca30f9121b7d7bef2decaa332d98de09a23631acb5f15bb99cf7dd11a
MD5 3bb79f816dce0825310522cb5a1446b3
SHA1 b3795a53a24b4f038abaddabfbf8c7f221e56986
SHA512 874fde8cdbd5fe626feaf6b353ab616392e30edee29e44365a64e569acc8984708e59b0ad538cd74513738e253c5a7706d97f52120d0c51de2e7e12e05f27339
SSDEEP 3072:9FSwhKDdKtTZVdOEaoxVDYn10zGJP4eLhSco/fWoB7re9Z9Idl8v4qClISH:awhKDaZfFTxV8nXgesN/OpLcl8v4qwIq
TLSH
T1A9E301E2215AD2B3F4BE177D9C57050EF9BD14009BB88A5B57C0781A2C1AA36E93D373
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3252-9-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/3252-12-0x000000001004E000-0x000000001004F000-memory.dmp

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memory/3252-10-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/3252-13-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/4364-6-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/6016-0-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/6016-2-0x0000000000400000-0x0000000000461000-memory.dmp

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