farfli | fa97e715c8460b531058490a1ed3bb691a72f8274d2b9af3f990a6853b520bc4

Analysis

max time kernel
149s
max time network
94s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
21/04/2026, 03:46

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General

Target
2026-04-21_8432defbad2a54155a46bfbff06a15ec_elex_wannacry.exe
Size 369KB
Sample260421-ebryyabs7t
SHA256 fa97e715c8460b531058490a1ed3bb691a72f8274d2b9af3f990a6853b520bc4
MD5 8432defbad2a54155a46bfbff06a15ec
SHA1 a05ac52f9b407d88bc655949c12da1e75b2e2e8e
SHA512 11dc3e54700e3115d6cb27ba954cc2acbadfa615e932a89382be206dbe656ebfb2cfc126c851a9b38f172b5f5deba4fea991d33769a57a012507de07fde4db1a
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9:FcirO2PE2QC00me2VCzYYT2
TLSH
T15384DF1272D048F6E4853633CE76BE74E3F9D4AC5E32DB775F98460C1E26A0993122AD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery 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 2 IoCs

resource	yara_rule
behavioral2/memory/4472-18-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/4472-22-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4472-18-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4472-22-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 IoCs

pid	Process
3076	ffvth.exe

Executes dropped EXE 2 IoCs

pid	Process
3076	ffvth.exe
4472	jzz.exe

Loads dropped DLL 1 IoCs

pid	Process
4472	jzz.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-1-5-21-3847269522-1618051987-1942096715-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\ckzrh\\jzz.exe \"c:\\Program Files\\ckzrh\\jzzgk.dll\",Compliance"	jzz.exe

Enumerates connected drives 3 TTPs 2 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)	\??\a:	jzz.exe
File opened (read-only)	\??\b:	jzz.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	jzz.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	\??\c:\Program Files\ckzrh\jzz.exe	ffvth.exe
File opened for modification	\??\c:\Program Files\ckzrh\jzz.exe	ffvth.exe
File opened for modification	\??\c:\Program Files\ckzrh	ffvth.exe
File created	\??\c:\Program Files\ckzrh\jzzgk.dll	ffvth.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3496	4472	WerFault.exe	84

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	2026-04-21_8432defbad2a54155a46bfbff06a15ec_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	ffvth.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jzz.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
2452	cmd.exe
1068	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1068	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4472	jzz.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1500	2026-04-21_8432defbad2a54155a46bfbff06a15ec_elex_wannacry.exe
3076	ffvth.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1500 wrote to memory of 2452	1500	2026-04-21_8432defbad2a54155a46bfbff06a15ec_elex_wannacry.exe	80
PID 2452 wrote to memory of 1068	2452	cmd.exe	82
PID 2452 wrote to memory of 3076	2452	cmd.exe	83
PID 3076 wrote to memory of 4472	3076	ffvth.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-04-21_8432defbad2a54155a46bfbff06a15ec_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-21_8432defbad2a54155a46bfbff06a15ec_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1500
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ffvth.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-21_8432defbad2a54155a46bfbff06a15ec_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2452
- - 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:1068
- - C:\Users\Admin\AppData\Local\Temp\ffvth.exe
    C:\Users\Admin\AppData\Local\Temp\\ffvth.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-21_8432defbad2a54155a46bfbff06a15ec_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:3076
  - - \??\c:\Program Files\ckzrh\jzz.exe
      "c:\Program Files\ckzrh\jzz.exe" "c:\Program Files\ckzrh\jzzgk.dll",Compliance C:\Users\Admin\AppData\Local\Temp\ffvth.exe
      4⤵
      Executes dropped EXE
      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
      Suspicious use of AdjustPrivilegeToken
      PID:4472
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4472 -s 1584
        5⤵
        Program crash
        
        PID:3496

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4472 -ip 4472
1⤵
PID:2808

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

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Downloads

jzz.exe

Path C:\Program Files\ckzrh\jzz.exe
Size 40KB
SHA256 8dcaeeebef9b9f3d41d295db145ffb3850f309d089c08125c7fa7034db5fd80e
MD5 22bb5bd901d8b25ac5b41edbb7d5053e
SHA1 8a935dd8d7e104fc553ff7e8b54a404f7b079334
SHA512 cc3fb68fd6791a08e4a7d1a8db8d07cfcc8c9b9dceec10b53f0cb7ee86473303a19be4f23e379f84c59e02d0568e7c066e21cd1300f6032dac4ba52f609f62e7
SSDEEP 768:C67uhQpPPp0nnqFk509FRdVcQX6N58hJYim1jLP3RRe:C67uhQpXp0nnqa5093jKNAmB3RR
TLSH
T10C134C02BE88C071DDA114B41A5DB337939DED604B1586D3593887EBAA2D3E39E343DE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

jzzgk.dll

Path C:\Program Files\ckzrh\jzzgk.dll
Size 179KB
SHA256 da7af675ba3f6beb2b2ecd966787c7138bf3e2abfc6e81f9644e9a040209fda9
MD5 5feeb95697a2cf955a29287e426af000
SHA1 4b91b8688ea65f8e04d4604016d4e9d06340da9a
SHA512 dc6ebd23c5288c8522cde59fbe67e6fae9ca2525024989ba9667481ff77bdd1ea984bc4a8b710108af62f4ba317581d1ab098029403dd515120594aa31238139
SSDEEP 3072:EC5Wpfs98nVCWdKycHtld8VBt7NUalwXH9RqYzJabTYd3KIdj6+uFdi98pvO0hfj:ECOfQ8nVcycHrd8VBtBUa4HfRzJabT84
TLSH
T1640423EBBF42C652C84F6776B6AF244437A901D91BC1E0A56F0482CE39C3135E67DE44
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ffvth.exe

Path C:\Users\Admin\AppData\Local\Temp\ffvth.exe
Size 369KB
SHA256 ed195c7664c94a19eb4bda154c051e077b67fa24dc4b359f410f5217660ff1cb
MD5 3d7c0f4aa9f7b4430abb26f66a0de1a4
SHA1 709f51aefcb153b066012a123c54a280761c642e
SHA512 824a80d986d6c15d459072ab4f3de1d4f1438a4d50533a550fbfbefb7fffe2130d6af1b32cb065dfd835def1e9990fdd54535b5fc55100f57f11444f60948a2b
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9:FcirO2PE2QC00me2VCzYYT2
TLSH
T19C84DF1272D048F6E4853633CE76BE74E3F9D4AC5E32DB775F98460C1E26A0993122AD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1500-0-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/1500-3-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/1500-2-0x0000000000B20000-0x0000000000BDB000-memory.dmp

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memory/3076-12-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/3076-11-0x00000000009B0000-0x0000000000A6B000-memory.dmp

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memory/4472-16-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/4472-17-0x0000000002580000-0x0000000002581000-memory.dmp

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memory/4472-18-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/4472-19-0x0000000000C80000-0x0000000000D5F000-memory.dmp

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memory/4472-22-0x0000000010000000-0x000000001004F000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads