farfli | 36199df14eb9e196a93148b1226d29e0b9d40ec94217b4aeab0f021c5d5e1def

Analysis

max time kernel
148s
max time network
138s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
22/09/2026, 21:39

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General

Target
2026-09-22_2dc8f9600558c028e3be7ef225be95af_elex_feodo_wannacry.exe
Size 148KB
Sample260922-1hsppsga76
SHA256 36199df14eb9e196a93148b1226d29e0b9d40ec94217b4aeab0f021c5d5e1def
MD5 2dc8f9600558c028e3be7ef225be95af
SHA1 986df417869224dc30eded7004c28b1d58c349a9
SHA512 26d27a902e91d6c882a00cf02b2faf1732108fd5f22f98d8f3510f95c4c36aad5a846c5abd31227e5f67169a921061e7152e66dfca20eb06794186e191eb3c7a
SSDEEP 1536:fli0XaKn5gYkqDqgEeEHgUyQLrdcUcsA08IzYJzKsoVXOeqD7hi/x0rTE86mwYUH:di0XaKncqY31L2WXb0E86mwYUiM
TLSH
T18EE37C6AE7E58542E3B18B7045F35B63AE72FD104AED8B4F7B40A75D4838B00ED29364
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

aspackv2 backdoor bootkit discovery execution farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

67.229.62.194:3201
http://67.229.62.197:805/index.php
http://67.229.62.198:803/

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 8 IoCs

resource	yara_rule
behavioral2/memory/3528-12-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral2/memory/3528-14-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral2/memory/3528-13-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral2/memory/3528-15-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral2/memory/3528-17-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral2/memory/3528-18-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral2/memory/3528-19-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral2/memory/3528-20-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 8 IoCs

resource	yara_rule
behavioral2/memory/3528-12-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3528-14-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3528-13-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3528-15-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3528-17-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3528-18-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3528-19-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3528-20-0x0000000010000000-0x0000000010036000-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
3	3528	rundll32.exe
7	3528	rundll32.exe
8	3528	rundll32.exe
9	3528	rundll32.exe
13	3528	rundll32.exe
14	3528	rundll32.exe
15	3528	rundll32.exe
18	3528	rundll32.exe

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral2/files/0x000d00000001c641-9.dat	aspack_v212_v242

Deletes itself 1 IoCs

pid	Process
5144	vjnzjlh.exe

Executes dropped EXE 1 IoCs

pid	Process
5144	vjnzjlh.exe

Loads dropped DLL 1 IoCs

pid	Process
3528	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-1-5-21-1704430598-3087477806-3297458608-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\apbpceah\\wyhbo.dll\",AbortProc"	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	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)	\??\o:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	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
5348	cmd.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	2026-09-22_2dc8f9600558c028e3be7ef225be95af_elex_feodo_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	vjnzjlh.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
5348	cmd.exe
2280	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2280	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3528	rundll32.exe
3528	rundll32.exe
3528	rundll32.exe
3528	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3528	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2148	2026-09-22_2dc8f9600558c028e3be7ef225be95af_elex_feodo_wannacry.exe
5144	vjnzjlh.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2148 wrote to memory of 5348	2148	2026-09-22_2dc8f9600558c028e3be7ef225be95af_elex_feodo_wannacry.exe	89
PID 5348 wrote to memory of 2280	5348	cmd.exe	91
PID 5348 wrote to memory of 5144	5348	cmd.exe	92
PID 5144 wrote to memory of 3528	5144	vjnzjlh.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-09-22_2dc8f9600558c028e3be7ef225be95af_elex_feodo_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-22_2dc8f9600558c028e3be7ef225be95af_elex_feodo_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2148
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\vjnzjlh.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-22_2dc8f9600558c028e3be7ef225be95af_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:5348
- - 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:2280
- - \??\c:\vjnzjlh.exe
    c:\vjnzjlh.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-22_2dc8f9600558c028e3be7ef225be95af_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:5144
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\apbpceah\wyhbo.dll",AbortProc c:\vjnzjlh.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)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3528

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

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

wyhbo.dll

Path \??\c:\apbpceah\wyhbo.dll
Size 87KB
SHA256 37ab4b7ee8f6b61c3854af4ed4676fd0d69f0260fb1296ad75e57aa08e1eeb03
MD5 a2c2137ff7abf6be6bcae4252c394a69
SHA1 07b402104df563f9486c2eef975fee70f65a5145
SHA512 5d05ed7c55bee8f41502acaea3d41fcf4421ad641d43f0b97b4cdc8fe584983da7712c561a53b708e88391df7929914746115700ae733155418693bcec6989a9
SSDEEP 1536:Z9f99U7uHXjIdqsxng0ZsiG4gYV82mwx86aY1Enb0jv4WDBT:bfTVHXEdqRYu2mwxB11EbiT1
TLSH
T10B93E08EBFD80A7FC6BF123244A7D636D2723C117B199D5231DE8E1F38561096B0A768
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

vjnzjlh.exe

Path \??\c:\vjnzjlh.exe
Size 148KB
SHA256 49cdcd56f1d639d3862e92a76dec72ee6f3a6e65838a1c834627acf1395ac477
MD5 ce185ab0d4434743774cddff7512f4b6
SHA1 64b056a83187c24dad390492035ce4d93a8a4946
SHA512 cdf8898934015645b2e9e0d06589bd265df0d94e9e398946bef18b7a2644818f87be5dd9ce67dd9a53fda2cd823a77b624b7336afceff3a4e8fb1571f86d86e0
SSDEEP 1536:fli0XaKn5gYkqDqgEeEHgUyQLrdcUcsA08IzYJzKsoVXOeqD7hi/x0rTE86mwYU5:di0XaKncqY31L2WXb0E86mwYUiU
TLSH
T1C6E37C6AE7E58542E3B18B7045F35B63AE72FD104AED8B4F7B40A75D4838B00ED29354
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2148-1-0x0000000000405000-0x0000000000406000-memory.dmp

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memory/2148-3-0x0000000000400000-0x0000000000428000-memory.dmp

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memory/2148-0-0x0000000000400000-0x0000000000428000-memory.dmp

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memory/3528-17-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/3528-11-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/3528-12-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/3528-14-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/3528-13-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/3528-15-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/3528-18-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/3528-19-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/3528-20-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/5144-8-0x0000000000400000-0x0000000000428000-memory.dmp

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memory/5144-6-0x0000000000400000-0x0000000000428000-memory.dmp

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