farfli | 9dae6db6cd8a3b8a18681d4bfb936b0db54804761faa889dedde9c6d9c0229f3

Analysis

max time kernel
149s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-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 3 IoCs

resource	yara_rule
behavioral1/memory/2136-16-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral1/memory/2136-18-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral1/memory/2136-21-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/2136-16-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2136-18-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2136-21-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3432	unznt.exe

Executes dropped EXE 2 IoCs

pid	Process
3432	unznt.exe
2136	bytgkebwo.exe

Loads dropped DLL 1 IoCs

pid	Process
2136	bytgkebwo.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-1-5-21-747854149-4118156852-591593384-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\rieybrvnw\\bytgkebwo.exe \"c:\\Program Files\\rieybrvnw\\bytgkebwo.dll\",Compliance"	bytgkebwo.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)	\??\y:	bytgkebwo.exe
File opened (read-only)	\??\l:	bytgkebwo.exe
File opened (read-only)	\??\m:	bytgkebwo.exe
File opened (read-only)	\??\o:	bytgkebwo.exe
File opened (read-only)	\??\p:	bytgkebwo.exe
File opened (read-only)	\??\q:	bytgkebwo.exe
File opened (read-only)	\??\x:	bytgkebwo.exe
File opened (read-only)	\??\z:	bytgkebwo.exe
File opened (read-only)	\??\g:	bytgkebwo.exe
File opened (read-only)	\??\h:	bytgkebwo.exe
File opened (read-only)	\??\i:	bytgkebwo.exe
File opened (read-only)	\??\j:	bytgkebwo.exe
File opened (read-only)	\??\v:	bytgkebwo.exe
File opened (read-only)	\??\w:	bytgkebwo.exe
File opened (read-only)	\??\a:	bytgkebwo.exe
File opened (read-only)	\??\b:	bytgkebwo.exe
File opened (read-only)	\??\e:	bytgkebwo.exe
File opened (read-only)	\??\k:	bytgkebwo.exe
File opened (read-only)	\??\n:	bytgkebwo.exe
File opened (read-only)	\??\r:	bytgkebwo.exe
File opened (read-only)	\??\t:	bytgkebwo.exe
File opened (read-only)	\??\u:	bytgkebwo.exe
File opened (read-only)	\??\s:	bytgkebwo.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	bytgkebwo.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\rieybrvnw	unznt.exe
File created	\??\c:\Program Files\rieybrvnw\bytgkebwo.dll	unznt.exe
File created	\??\c:\Program Files\rieybrvnw\bytgkebwo.exe	unznt.exe
File opened for modification	\??\c:\Program Files\rieybrvnw\bytgkebwo.exe	unznt.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
5116	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	bytgkebwo.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	bytgkebwo.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	bytgkebwo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-22_fbabd121346dd41ad113fed8ad3c9f97_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	unznt.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
5116	cmd.exe
4992	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	bytgkebwo.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	bytgkebwo.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4992	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2136	bytgkebwo.exe
2136	bytgkebwo.exe
2136	bytgkebwo.exe
2136	bytgkebwo.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2136	bytgkebwo.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4988	2026-10-22_fbabd121346dd41ad113fed8ad3c9f97_elex_wannacry.exe
3432	unznt.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4988 wrote to memory of 5116	4988	2026-10-22_fbabd121346dd41ad113fed8ad3c9f97_elex_wannacry.exe	87
PID 5116 wrote to memory of 4992	5116	cmd.exe	89
PID 5116 wrote to memory of 3432	5116	cmd.exe	90
PID 3432 wrote to memory of 2136	3432	unznt.exe	91

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:4988
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\unznt.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:5116
- - 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:4992
- - C:\Users\Admin\AppData\Local\Temp\unznt.exe
    C:\Users\Admin\AppData\Local\Temp\\unznt.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:3432
  - - \??\c:\Program Files\rieybrvnw\bytgkebwo.exe
      "c:\Program Files\rieybrvnw\bytgkebwo.exe" "c:\Program Files\rieybrvnw\bytgkebwo.dll",Compliance C:\Users\Admin\AppData\Local\Temp\unznt.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:2136

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

bytgkebwo.exe

Path C:\Program Files\rieybrvnw\bytgkebwo.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
TLSH
T127532AC2FA00C171D4A7563019778F1A5766AC13DB728ACB94B0B4A41EB3291AD3E5FF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

unznt.exe

Path C:\Users\Admin\AppData\Local\Temp\unznt.exe
Size 360KB
SHA256 3105c2c08bcf4aad21ba656f482a1f415deed7e2d180e8ae1450e8aea1eec314
MD5 9261fc2547b8289978ae70b9481f40e1
SHA1 dc6030b67ead4e2a57fe55c29140bbc47ee762d7
SHA512 eb83c2da3fe5eeba60d421c2dd5cb17916e8001d0719e182d6f6b23ec950bab66abf36626508c8f79eebd5e4d753397b4cdd016bc7f9dcffb3deb3409f0d1f72
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9l:FcirO2PE2QC00me2VCzYYT2j
TLSH
T19374DF1372D048E6E4853633CE76BE74E3E9D0AC5E32DA775F98460D1E36A0993122AD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

bytgkebwo.dll

Path \??\c:\Program Files\rieybrvnw\bytgkebwo.dll
Size 179KB
SHA256 0e0d15cb1c377af70a3a5a2dad71e825840300afdec369c9d50a54d472ec91ff
MD5 1a28d162860a1330b9f022a9918adeba
SHA1 8ed20e67e03e990556e08cca253f460ac6a32369
SHA512 fee83c2d0c4ca124893d45c9d0b64270e7620f6695f50e849e935ef6e2a9bfd43105265f5ef2c47892e754e9b216d2d051be170ff35a82220ea22da8346a638e
SSDEEP 3072:EC5Wpfs98nVCWdKycHtld8VBt7NUalwXH9RqYzJabTYd3KIdj6+uFdi98pvO0hfR:ECOfQ8nVcycHrd8VBtBUa4HfRzJabT8u
TLSH
T1420423EABF42C652C84F6776B6AF244437A905D91BC1E0A56F0482CE39C3139E67DE48
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2136-14-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/2136-15-0x00000000010D0000-0x00000000010D1000-memory.dmp

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memory/2136-16-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/2136-18-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/2136-21-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/3432-10-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/4988-0-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/4988-2-0x0000000000400000-0x0000000000458000-memory.dmp

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