farfli | 9dae6db6cd8a3b8a18681d4bfb936b0db54804761faa889dedde9c6d9c0229f3

Analysis

max time kernel
148s
max time network
137s
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, 00:40

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General

Target
2026-10-22_fbabd121346dd41ad113fed8ad3c9f97_elex_wannacry.exe
Size 360KB
Sample261023-az927sbs8p
SHA256 9dae6db6cd8a3b8a18681d4bfb936b0db54804761faa889dedde9c6d9c0229f3
MD5 fbabd121346dd41ad113fed8ad3c9f97
SHA1 7e6d9cdb26489aaf53a44f30791006e6d7733eb8
SHA512 dc8bc362ea1d1946fef7072827219e89f48ad8e07a9fc0e5d9a6e6e834e94e79f8af67c69cafa7916abe320767233cdcd062f4c712a3680e875985df13668ad9
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9:FcirO2PE2QC00me2VCzYYT2
TLSH
T17B74DF1372D048E6E4853633CE76BE74E3E9D0AC5E32DA775F98460D1E36A0993122AD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion discovery execution farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

107.163.56.251:6658
http://107.163.56.240:18963/main.php
http://107.163.56.241:18530/

Attributes

user_agent
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C))

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli
Family: Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat

Detects Farfli Backdoor 4 IoCs

resource	yara_rule
behavioral2/memory/1484-10-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/1484-12-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/1484-14-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/1484-16-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral2/memory/1484-10-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1484-12-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1484-14-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1484-16-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
5736	jyezz.exe

Executes dropped EXE 2 IoCs

pid	Process
5736	jyezz.exe
1484	tumx.exe

Loads dropped DLL 1 IoCs

pid	Process
1484	tumx.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-1-5-21-1704430598-3087477806-3297458608-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\xfnbp\\tumx.exe \"c:\\Program Files\\xfnbp\\tumxw.dll\",Compliance"	tumx.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)	\??\j:	tumx.exe
File opened (read-only)	\??\x:	tumx.exe
File opened (read-only)	\??\g:	tumx.exe
File opened (read-only)	\??\l:	tumx.exe
File opened (read-only)	\??\p:	tumx.exe
File opened (read-only)	\??\s:	tumx.exe
File opened (read-only)	\??\u:	tumx.exe
File opened (read-only)	\??\d:	tumx.exe
File opened (read-only)	\??\h:	tumx.exe
File opened (read-only)	\??\i:	tumx.exe
File opened (read-only)	\??\m:	tumx.exe
File opened (read-only)	\??\n:	tumx.exe
File opened (read-only)	\??\v:	tumx.exe
File opened (read-only)	\??\z:	tumx.exe
File opened (read-only)	\??\k:	tumx.exe
File opened (read-only)	\??\q:	tumx.exe
File opened (read-only)	\??\r:	tumx.exe
File opened (read-only)	\??\t:	tumx.exe
File opened (read-only)	\??\w:	tumx.exe
File opened (read-only)	\??\y:	tumx.exe
File opened (read-only)	\??\o:	tumx.exe
File opened (read-only)	\??\a:	tumx.exe
File opened (read-only)	\??\b:	tumx.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	tumx.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\xfnbp	jyezz.exe
File created	\??\c:\Program Files\xfnbp\tumxw.dll	jyezz.exe
File created	\??\c:\Program Files\xfnbp\tumx.exe	jyezz.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
4140	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	tumx.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	tumx.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	jyezz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tumx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-22_fbabd121346dd41ad113fed8ad3c9f97_elex_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
4840	PING.EXE
4140	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	tumx.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	tumx.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4840	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1484	tumx.exe
1484	tumx.exe
1484	tumx.exe
1484	tumx.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1484	tumx.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
480	2026-10-22_fbabd121346dd41ad113fed8ad3c9f97_elex_wannacry.exe
5736	jyezz.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 480 wrote to memory of 4140	480	2026-10-22_fbabd121346dd41ad113fed8ad3c9f97_elex_wannacry.exe	89
PID 4140 wrote to memory of 4840	4140	cmd.exe	91
PID 4140 wrote to memory of 5736	4140	cmd.exe	92
PID 5736 wrote to memory of 1484	5736	jyezz.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-10-22_fbabd121346dd41ad113fed8ad3c9f97_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-22_fbabd121346dd41ad113fed8ad3c9f97_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:480
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\jyezz.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-22_fbabd121346dd41ad113fed8ad3c9f97_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:4140
- - 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:4840
- - C:\Users\Admin\AppData\Local\Temp\jyezz.exe
    C:\Users\Admin\AppData\Local\Temp\\jyezz.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-22_fbabd121346dd41ad113fed8ad3c9f97_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:5736
  - - \??\c:\Program Files\xfnbp\tumx.exe
      "c:\Program Files\xfnbp\tumx.exe" "c:\Program Files\xfnbp\tumxw.dll",Compliance C:\Users\Admin\AppData\Local\Temp\jyezz.exe
      4⤵
      Executes dropped EXE
      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:1484

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

Replay Monitor

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Downloads

tumx.exe

Path C:\Program Files\xfnbp\tumx.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

jyezz.exe

Path C:\Users\Admin\AppData\Local\Temp\jyezz.exe
Size 361KB
SHA256 6d1829ce03b8bdf2774919df7a63da8ff4831a4bbee1345b04a17d1f5f0d6aff
MD5 912c5ef7c23eb523140ba886948640a0
SHA1 8324504feed22a1be5a3974bd2c8ca3194e2daea
SHA512 61e685083e7bd67ec51ac125d765b4cedf25dde15abaf0fc6ff151f0a6f9809eb4d5980366e756836a5a3652877d13254f324a3fdd96825d91ff91d2f019bb60
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9:FcirO2PE2QC00me2VCzYYT2
TLSH
T1FF74DF1372D048E6E4853633CE76BE74E3E9D0AC5E32DA775F98460D1E36A0993122AD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tumxw.dll

Path \??\c:\Program Files\xfnbp\tumxw.dll
Size 179KB
SHA256 ecf4636da91338abc376b15fe3dd56bf13a17cdf0dfb3ee03fca96f16a27d8d8
MD5 9f7ffdec19e8fc8b594ffa663c12e981
SHA1 5be9c93816679f801772a997b8a2a0b2228ff3ed
SHA512 f8a35928471f727b7a976ee76685fcb15c41f7cd3e8e892884ca3065a4738571bec14e379831a622fc05b918c66623fe6d798eaad70349799737111b93da369b
SSDEEP 3072:EC5Wpfs98nVCWdKycHtld8VBt7NUalwXH9RqYzJabTYd3KIdj6+uFdi98pvO0hfi:ECOfQ8nVcycHrd8VBtBUa4HfRzJabT8l
TLSH
T13E0423EABF42C652C84F6776B6AF244437AD02D91BC1E0A56F0482CE39C3135E67DE48
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/480-0-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/480-2-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/1484-11-0x00000000010B0000-0x00000000010B1000-memory.dmp

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memory/1484-10-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1484-12-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1484-14-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1484-16-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/5736-7-0x0000000000400000-0x0000000000458000-memory.dmp

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