farfli | c16b127c0b02a4793e747441d02935274a03321d8292c6f5d991af38f67244b5

Analysis

max time kernel
148s
max time network
137s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260706-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260706-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
08/07/2026, 22:41

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General

Target
2026-07-08_11d06fd1722e7c0570211b1fd50dccc0_elex_wannacry.exe
Size 366KB
Sample260708-2makcsas7j
SHA256 c16b127c0b02a4793e747441d02935274a03321d8292c6f5d991af38f67244b5
MD5 11d06fd1722e7c0570211b1fd50dccc0
SHA1 1ee87f15eee0b213e798c4c8ba1635a87479644b
SHA512 7002c5ba0dc6f039fbc04deb960a5b7a9f079be229d1648a8b6a424d1061f7551f8d2078c68162ba8e68b6e5f92d2ced1ad2996a049d07e91262eade4372132f
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa92:FcirO2PE2QC00me2VCzYYT24
TLSH
T15E84DF1272D048F6E4853633CE76BE70E3F9D4AC5D32DB775F98460D1E36A0992122AD
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 3 IoCs

resource	yara_rule
behavioral2/memory/1248-12-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/1248-14-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/1248-17-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/1248-12-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1248-14-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1248-17-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 IoCs

pid	Process
1772	tcpulcrc.exe

Executes dropped EXE 2 IoCs

pid	Process
1772	tcpulcrc.exe
1248	dbrsvbzfr.exe

Loads dropped DLL 1 IoCs

pid	Process
1248	dbrsvbzfr.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-1-5-21-2626306573-1585762579-411806764-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\yeilf\\dbrsvbzfr.exe \"c:\\Program Files\\yeilf\\dbrsvbzfr.dll\",Compliance"	dbrsvbzfr.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)	\??\b:	dbrsvbzfr.exe
File opened (read-only)	\??\g:	dbrsvbzfr.exe
File opened (read-only)	\??\s:	dbrsvbzfr.exe
File opened (read-only)	\??\y:	dbrsvbzfr.exe
File opened (read-only)	\??\i:	dbrsvbzfr.exe
File opened (read-only)	\??\m:	dbrsvbzfr.exe
File opened (read-only)	\??\v:	dbrsvbzfr.exe
File opened (read-only)	\??\a:	dbrsvbzfr.exe
File opened (read-only)	\??\d:	dbrsvbzfr.exe
File opened (read-only)	\??\k:	dbrsvbzfr.exe
File opened (read-only)	\??\l:	dbrsvbzfr.exe
File opened (read-only)	\??\o:	dbrsvbzfr.exe
File opened (read-only)	\??\p:	dbrsvbzfr.exe
File opened (read-only)	\??\r:	dbrsvbzfr.exe
File opened (read-only)	\??\w:	dbrsvbzfr.exe
File opened (read-only)	\??\h:	dbrsvbzfr.exe
File opened (read-only)	\??\j:	dbrsvbzfr.exe
File opened (read-only)	\??\n:	dbrsvbzfr.exe
File opened (read-only)	\??\q:	dbrsvbzfr.exe
File opened (read-only)	\??\t:	dbrsvbzfr.exe
File opened (read-only)	\??\u:	dbrsvbzfr.exe
File opened (read-only)	\??\x:	dbrsvbzfr.exe
File opened (read-only)	\??\z:	dbrsvbzfr.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	dbrsvbzfr.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\yeilf	tcpulcrc.exe
File created	\??\c:\Program Files\yeilf\dbrsvbzfr.dll	tcpulcrc.exe
File created	\??\c:\Program Files\yeilf\dbrsvbzfr.exe	tcpulcrc.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	2026-07-08_11d06fd1722e7c0570211b1fd50dccc0_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	tcpulcrc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dbrsvbzfr.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
4676	cmd.exe
1448	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	dbrsvbzfr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dbrsvbzfr.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1448	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1248	dbrsvbzfr.exe
1248	dbrsvbzfr.exe
1248	dbrsvbzfr.exe
1248	dbrsvbzfr.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1248	dbrsvbzfr.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3668	2026-07-08_11d06fd1722e7c0570211b1fd50dccc0_elex_wannacry.exe
1772	tcpulcrc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3668 wrote to memory of 4676	3668	2026-07-08_11d06fd1722e7c0570211b1fd50dccc0_elex_wannacry.exe	88
PID 4676 wrote to memory of 1448	4676	cmd.exe	90
PID 4676 wrote to memory of 1772	4676	cmd.exe	91
PID 1772 wrote to memory of 1248	1772	tcpulcrc.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-07-08_11d06fd1722e7c0570211b1fd50dccc0_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-08_11d06fd1722e7c0570211b1fd50dccc0_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3668
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\tcpulcrc.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-08_11d06fd1722e7c0570211b1fd50dccc0_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4676
- - 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:1448
- - C:\Users\Admin\AppData\Local\Temp\tcpulcrc.exe
    C:\Users\Admin\AppData\Local\Temp\\tcpulcrc.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-08_11d06fd1722e7c0570211b1fd50dccc0_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:1772
  - - \??\c:\Program Files\yeilf\dbrsvbzfr.exe
      "c:\Program Files\yeilf\dbrsvbzfr.exe" "c:\Program Files\yeilf\dbrsvbzfr.dll",Compliance C:\Users\Admin\AppData\Local\Temp\tcpulcrc.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
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1248

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

Replay Monitor

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Downloads

dbrsvbzfr.exe

Path C:\Program Files\yeilf\dbrsvbzfr.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

tcpulcrc.exe

Path C:\Users\Admin\AppData\Local\Temp\tcpulcrc.exe
Size 367KB
SHA256 0305a4dbc1e65edb415d333bbf7c38048dda556696d2ee5fe854b14e61ce240c
MD5 550d9f6459647bae4b13d5f1a900e5fc
SHA1 391fd7858a731cbac49291c6471f5cc1119a9540
SHA512 d189df0d28143cf06b3b5b899bd41ee0657107b4607bc481a453d397dc6cee2f5349cf52ca4f8f0fec6ec30a169281c2025a76c686e9fc6ed92ee2ba70c1ad06
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9:FcirO2PE2QC00me2VCzYYT2
TLSH
T12184DF1272D048F6E4853633CE76BE70E3F9D4AC5D32DB775F98460D1E36A0992122AD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

dbrsvbzfr.dll

Path \??\c:\Program Files\yeilf\dbrsvbzfr.dll
Size 179KB
SHA256 629b5e641f6fe63528b2bb1e9d602356e6c2b47dea4f3117adffd42f17049280
MD5 91ac8bc102bf0807617ae6f6b4979cae
SHA1 c6d992a6c6274fcbac804ac444969d9f09ae9750
SHA512 66eb2b194d46c4d284e454f88410fa1d451662560a7ad4eb6f0cd3430e74cd738794c916741494ee5b37d90e68376e9989d7937eb8437b7621c1cec57d837509
SSDEEP 3072:EC5Wpfs98nVCWdKycHtld8VBt7NUalwXH9RqYzJabTYd3KIdj6+uFdi98pvO0hfe:ECOfQ8nVcycHrd8VBtBUa4HfRzJabT8J
TLSH
T1830423EABF42C652C84F6776B6AF244437AA05D91BC1E0A56F0482CE39C3139E67DE44
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1248-11-0x0000000000F00000-0x0000000000F01000-memory.dmp

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memory/1248-10-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1248-12-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1248-14-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1248-17-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1772-8-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/3668-0-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/3668-2-0x0000000000400000-0x0000000000458000-memory.dmp

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