farfli | d5426e99129ea60595a91f0183b4dcd62849121a73d1bff1cdac5b79d0be480b

Analysis

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

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
26/09/2026, 19:56

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General

Target
2026-09-26_7d5d565d8e070fcb47b097d830067779_elex_feodo_wannacry.exe
Size 98KB
Sample260926-yn4m2ssvds
SHA256 d5426e99129ea60595a91f0183b4dcd62849121a73d1bff1cdac5b79d0be480b
MD5 7d5d565d8e070fcb47b097d830067779
SHA1 7185db168923df95cc6ea28cbc52ca4df0711910
SHA512 672f9f096a224848202f40a5b2f0c830559285a1d9f1e6ccf79fffdd569e9488d97220b35866facd22e646d9e68121ace3be1d8ea38c9a129c1a9e69f315071f
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcc:ELRrO10TiJD9yjqrilyxOl
TLSH
T10AA3BF5D7C83885EE5048B7047539626B6A26C59FA704F378340BA1EBB33907EDE928D
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/5808-11-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/5808-17-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/5808-11-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5808-17-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 3 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
2	5808	rundll32.exe
3	5808	rundll32.exe
5	5808	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
5184	jmhan.exe

Executes dropped EXE 1 IoCs

pid	Process
5184	jmhan.exe

Loads dropped DLL 1 IoCs

pid	Process
5808	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-1-5-21-2251218687-1689653882-3767565116-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\xsien\\glcmfl.dll\",QueryPluginInterface"	rundll32.exe

Enumerates connected drives 3 TTPs 24 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)	\??\w:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
	\??\f:\	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	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
3820	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jmhan.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-09-26_7d5d565d8e070fcb47b097d830067779_elex_feodo_wannacry.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
3820	cmd.exe
3532	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
3532	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5808	rundll32.exe
5808	rundll32.exe
5808	rundll32.exe
5808	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5808	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4536	2026-09-26_7d5d565d8e070fcb47b097d830067779_elex_feodo_wannacry.exe
5184	jmhan.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4536 wrote to memory of 3820	4536	2026-09-26_7d5d565d8e070fcb47b097d830067779_elex_feodo_wannacry.exe	89
PID 3820 wrote to memory of 3532	3820	cmd.exe	91
PID 3820 wrote to memory of 5184	3820	cmd.exe	92
PID 5184 wrote to memory of 5808	5184	jmhan.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-09-26_7d5d565d8e070fcb47b097d830067779_elex_feodo_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-26_7d5d565d8e070fcb47b097d830067779_elex_feodo_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\jmhan.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-26_7d5d565d8e070fcb47b097d830067779_elex_feodo_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:3820
- - 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:3532
- - C:\Users\Admin\AppData\Local\Temp\jmhan.exe
    C:\Users\Admin\AppData\Local\Temp\\jmhan.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-26_7d5d565d8e070fcb47b097d830067779_elex_feodo_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5184
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\xsien\glcmfl.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\jmhan.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:5808

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

jmhan.exe

Path C:\Users\Admin\AppData\Local\Temp\jmhan.exe
Size 98KB
SHA256 2fd38f75ee659c68e2397be7d0759d52640ea4a51a19e124f40a4cc09c4540b6
MD5 76202c8f380ab5e2922eb33f38d5da95
SHA1 ed909edb87bc123644d9f8b02700044a545e6c0a
SHA512 44abe8e3a14f9e6d34f44de8820c64c5a4cacf1c81b057e7674d7ee9ac8cf5c8e80be3aa3e454289a14d5a13d7bf3ed7d9804eca94f3f48b35859963c058c214
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcp:ELRrO10TiJD9yjqrilyxOo
TLSH
T189A3CF5D7C83885EE5048B7047439626B6A36C59FA704F378340BA1EBB33907EDE928D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

glcmfl.dll

Path \??\c:\xsien\glcmfl.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/4536-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4536-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5184-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5808-9-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/5808-10-0x00000000025F0000-0x00000000025F2000-memory.dmp

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memory/5808-11-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/5808-12-0x00000000025F0000-0x00000000025F2000-memory.dmp

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memory/5808-17-0x0000000010000000-0x0000000010023000-memory.dmp

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