farfli | 88210b3ae361e18cca23f271935ecc7ef681e163d76b564ac544b58658163e43

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
21/10/2026, 19:30

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General

Target
2026-10-20_c006c179acef433bafda035687a9cfc8_elex_wannacry.exe
Size 361KB
Sample261021-x76fbaxt8k
SHA256 88210b3ae361e18cca23f271935ecc7ef681e163d76b564ac544b58658163e43
MD5 c006c179acef433bafda035687a9cfc8
SHA1 ff34b20889c629ab0b825f28f88a03c9994c67dc
SHA512 d805412c3fbd70d735a2d051e17b8480e06833905b5c71a695d5cd23bfc43948bb6ceebd51ee39815825f9e6a0c0a8a39261df7fa55392004a64515c33a5cbc8
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9:FcirO2PE2QC00me2VCzYYT2
TLSH
T10574DF1272D048BAE4853633CD76BE74E3F9D0AC5E32DA775F98460C1E36A0993122AD
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 3 IoCs

resource	yara_rule
behavioral2/memory/1060-12-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/1060-14-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/1060-16-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/1060-12-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1060-14-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1060-16-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3084	frdzryr.exe

Executes dropped EXE 2 IoCs

pid	Process
3084	frdzryr.exe
1060	vkz.exe

Loads dropped DLL 1 IoCs

pid	Process
1060	vkz.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-1-5-21-560646293-820748483-2532804640-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\nsjwkc\\vkz.exe \"c:\\Program Files\\nsjwkc\\vkzpr.dll\",Compliance"	vkz.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:	vkz.exe
File opened (read-only)	\??\o:	vkz.exe
File opened (read-only)	\??\u:	vkz.exe
File opened (read-only)	\??\w:	vkz.exe
File opened (read-only)	\??\x:	vkz.exe
File opened (read-only)	\??\b:	vkz.exe
File opened (read-only)	\??\p:	vkz.exe
File opened (read-only)	\??\v:	vkz.exe
File opened (read-only)	\??\y:	vkz.exe
File opened (read-only)	\??\z:	vkz.exe
File opened (read-only)	\??\a:	vkz.exe
File opened (read-only)	\??\g:	vkz.exe
File opened (read-only)	\??\i:	vkz.exe
File opened (read-only)	\??\k:	vkz.exe
File opened (read-only)	\??\l:	vkz.exe
File opened (read-only)	\??\m:	vkz.exe
File opened (read-only)	\??\n:	vkz.exe
File opened (read-only)	\??\q:	vkz.exe
File opened (read-only)	\??\r:	vkz.exe
File opened (read-only)	\??\s:	vkz.exe
File opened (read-only)	\??\t:	vkz.exe
File opened (read-only)	\??\d:	vkz.exe
File opened (read-only)	\??\h:	vkz.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	vkz.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\nsjwkc	frdzryr.exe
File created	\??\c:\Program Files\nsjwkc\vkzpr.dll	frdzryr.exe
File created	\??\c:\Program Files\nsjwkc\vkz.exe	frdzryr.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
52	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	vkz.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	vkz.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	2026-10-20_c006c179acef433bafda035687a9cfc8_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	frdzryr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vkz.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
52	cmd.exe
2448	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	vkz.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	vkz.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2448	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1060	vkz.exe
1060	vkz.exe
1060	vkz.exe
1060	vkz.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1060	vkz.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1188	2026-10-20_c006c179acef433bafda035687a9cfc8_elex_wannacry.exe
3084	frdzryr.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1188 wrote to memory of 52	1188	2026-10-20_c006c179acef433bafda035687a9cfc8_elex_wannacry.exe	90
PID 52 wrote to memory of 2448	52	cmd.exe	92
PID 52 wrote to memory of 3084	52	cmd.exe	93
PID 3084 wrote to memory of 1060	3084	frdzryr.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-10-20_c006c179acef433bafda035687a9cfc8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-20_c006c179acef433bafda035687a9cfc8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1188
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\frdzryr.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-20_c006c179acef433bafda035687a9cfc8_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:52
- - 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:2448
- - C:\Users\Admin\AppData\Local\Temp\frdzryr.exe
    C:\Users\Admin\AppData\Local\Temp\\frdzryr.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-20_c006c179acef433bafda035687a9cfc8_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:3084
  - - \??\c:\Program Files\nsjwkc\vkz.exe
      "c:\Program Files\nsjwkc\vkz.exe" "c:\Program Files\nsjwkc\vkzpr.dll",Compliance C:\Users\Admin\AppData\Local\Temp\frdzryr.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:1060

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

vkz.exe

Path C:\Program Files\nsjwkc\vkz.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

frdzryr.exe

Path C:\Users\Admin\AppData\Local\Temp\frdzryr.exe
Size 361KB
SHA256 9346f8a75817cf67613764ebb0255066d6c1e044ddd4881a3bf634a17eaeb267
MD5 390b36a52884e6c94906cf1004d0cb84
SHA1 d24b463608dde206b85479f16d2f0607947d16a8
SHA512 be19fc73c9ee8e352e0b0f0db5748e590764cdb8908105ca1f353a2ae5dc0bfea8560c17998c487a9228e8db6c20e689586ac6bb57ba7fa6b162430ffd751291
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9Z:FcirO2PE2QC00me2VCzYYT2T
TLSH
T12A74DF1372D048BAE4853633CD76BE74E3F9D0AC5E32DA775F98460C1E36A0997122AD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

vkzpr.dll

Path \??\c:\Program Files\nsjwkc\vkzpr.dll
Size 179KB
SHA256 151c9ef6dc04913287886536b46ef7ae2174518389ed9d85aafbc94128bb295e
MD5 5d52307cae7a4cb249ee653e2c389a03
SHA1 dd28852eed4bf3911de081483f68601001dd3c82
SHA512 e0eb666d38e66f9290346f0dc89e647de5d479e4c26f46f12aebc9ed6050d4dee2ce9ef1484fc2876f1d5557d0ab24119e9f0126ce649ff42b1882837cb313c3
SSDEEP 3072:EC5Wpfs98nVCWdKycHtld8VBt7NUalwXH9RqYzJabTYd3KIdj6+uFdi98pvO0hf+:ECOfQ8nVcycHrd8VBtBUa4HfRzJabT8z
TLSH
T10D0423EABF42C652C84F6776B6AF244437AD06D91BC1E0A56F0482CE39C3135E67DE48
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1060-11-0x0000000001180000-0x0000000001181000-memory.dmp

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memory/1060-10-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1060-12-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1060-14-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1060-16-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1188-0-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/1188-2-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/3084-7-0x0000000000400000-0x0000000000458000-memory.dmp

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