farfli | 02e237f6836d1b9f1f16f38b1ec5b960d06e435f80fe09d877465d07973f0153

Analysis

max time kernel
149s
max time network
160s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
19/04/2026, 12:21

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General

Target
2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe
Size 369KB
Sample260419-pjn75ae16w
SHA256 02e237f6836d1b9f1f16f38b1ec5b960d06e435f80fe09d877465d07973f0153
MD5 0ba6648a719e6f96fba97205df71e11f
SHA1 6415df7504873195400bd2cbad0e975090d3f646
SHA512 34073112b4ce6f1261b6bb11869e9bd0ea63ccaecc1d3b96b8e4d25c25a4aa7acb47e29e126363766e6969788c9ca3484c5f79aa622167d055272f89a508dcca
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9:FcirO2PE2QC00me2VCzYYT2
TLSH
T11784DF1272D048F6E4853633CE76BE74E3F9D4AC5D32DB775F98460C1E26A0993222AD
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/1116-16-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/1116-18-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/1116-16-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1116-18-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 IoCs

pid	Process
4172	ybxqs.exe

Executes dropped EXE 2 IoCs

pid	Process
4172	ybxqs.exe
1116	wbraxdf.exe

Loads dropped DLL 1 IoCs

pid	Process
1116	wbraxdf.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-1-5-21-1383858298-2057492509-1726743289-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\iomct\\wbraxdf.exe \"c:\\Program Files\\iomct\\wbraxdf.dll\",Compliance"	wbraxdf.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:	wbraxdf.exe
File opened (read-only)	\??\b:	wbraxdf.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	wbraxdf.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\iomct	ybxqs.exe
File created	\??\c:\Program Files\iomct\wbraxdf.dll	ybxqs.exe
File created	\??\c:\Program Files\iomct\wbraxdf.exe	ybxqs.exe
File opened for modification	\??\c:\Program Files\iomct\wbraxdf.exe	ybxqs.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1180	1116	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	ybxqs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wbraxdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-19_0ba6648a719e6f96fba97205df71e11f_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

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
4532	PING.EXE
452	cmd.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4532	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1116	wbraxdf.exe
1116	wbraxdf.exe
1116	wbraxdf.exe
1116	wbraxdf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1116	wbraxdf.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4084	2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe
4172	ybxqs.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4084 wrote to memory of 452	4084	2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe	80
PID 452 wrote to memory of 4532	452	cmd.exe	82
PID 452 wrote to memory of 4172	452	cmd.exe	83
PID 4172 wrote to memory of 1116	4172	ybxqs.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4084
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ybxqs.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:452
- - 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:4532
- - C:\Users\Admin\AppData\Local\Temp\ybxqs.exe
    C:\Users\Admin\AppData\Local\Temp\\ybxqs.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-19_0ba6648a719e6f96fba97205df71e11f_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:4172
  - - \??\c:\Program Files\iomct\wbraxdf.exe
      "c:\Program Files\iomct\wbraxdf.exe" "c:\Program Files\iomct\wbraxdf.dll",Compliance C:\Users\Admin\AppData\Local\Temp\ybxqs.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 behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1116
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1116 -s 1592
        5⤵
        Program crash
        
        PID:1180

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1116 -ip 1116
1⤵
PID:1132

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

wbraxdf.dll

Path C:\Program Files\iomct\wbraxdf.dll
Size 179KB
SHA256 f387ebae914a611eb7634f7c9dd30fbf34c63b2b76e2264ce3c2f65e1d2b057c
MD5 8810ada8886ac33e15a8d6731a161294
SHA1 4c40bd3ab3511b190e09c26b04a92fcd20a8aa0d
SHA512 52bdbe1db3e8a170a631a6753eed53a39cfcad0498042a8b314054b01a85bfe5342bbd1d97c82aa78ece108a1643da4d487f7e04c85941ac3e6b1b5d29292f06
SSDEEP 3072:EC5Wpfs98nVCWdKycHtld8VBt7NUalwXH9RqYzJabTYd3KIdj6+uFdi98pvO0hf7:ECOfQ8nVcycHrd8VBtBUa4HfRzJabT8w
TLSH
T12F0423EBBF82C652C84F6776B6AF244437A905D51BC1E0A56F0482CE39C3135E67DE48
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ybxqs.exe

Path C:\Users\Admin\AppData\Local\Temp\ybxqs.exe
Size 369KB
SHA256 0f4c4d94a824f466257cacda832ba27e23cc21f01f94481f5a947e2fbbd285c0
MD5 adf8f3a9a55b19a44f2295cfcf09a335
SHA1 6eef90314bfc1b0e87ac5024923dbf96ed5abaa4
SHA512 ab48c32c8177a858141d1568a59ee024d331fe07fad47a606c54b726cf6cd3015cac0076a2c1a5b81fc836581ddd791608e010744eaef77b3045309537bd9826
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9:FcirO2PE2QC00me2VCzYYT2
TLSH
T17384DF1272D048F6E4853633CE76BE74E3F9D4AC5D32DB775F98460C1E26A0993222AD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

wbraxdf.exe

Path \??\c:\Program Files\iomct\wbraxdf.exe
Size 40KB
SHA256 8dcaeeebef9b9f3d41d295db145ffb3850f309d089c08125c7fa7034db5fd80e
MD5 22bb5bd901d8b25ac5b41edbb7d5053e
SHA1 8a935dd8d7e104fc553ff7e8b54a404f7b079334
SHA512 cc3fb68fd6791a08e4a7d1a8db8d07cfcc8c9b9dceec10b53f0cb7ee86473303a19be4f23e379f84c59e02d0568e7c066e21cd1300f6032dac4ba52f609f62e7
SSDEEP 768:C67uhQpPPp0nnqFk509FRdVcQX6N58hJYim1jLP3RRe:C67uhQpXp0nnqa5093jKNAmB3RR
TLSH
T10C134C02BE88C071DDA114B41A5DB337939DED604B1586D3593887EBAA2D3E39E343DE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1116-15-0x00000000013C0000-0x00000000013C1000-memory.dmp

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memory/1116-14-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1116-16-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1116-18-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/4084-0-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/4084-2-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/4172-13-0x0000000000400000-0x0000000000458000-memory.dmp

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