farfli | 9efb6851194249eb0471f2b40d77c8567786b9f8917051142d5a4c6c86fde05e

Analysis

max time kernel
149s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
16/04/2026, 06:56

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General

Target
2026-04-16_5d58087f132bf0b447b4715575b896af_elex_wannacry.exe
Size 366KB
Sample260416-hqcdkshv3q
SHA256 9efb6851194249eb0471f2b40d77c8567786b9f8917051142d5a4c6c86fde05e
MD5 5d58087f132bf0b447b4715575b896af
SHA1 00f1c04f259b695b52542d320098f4b73fdefcb5
SHA512 48cb7eec7d219f7f0f4ace830d8e3dd38fdb068ae4416430a40c4d93b334afffae411ffcd52e21466be8bbcb3dafcb3b3b5fc074130adf96df23f358ec4fed05
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9o:FcirO2PE2QC00me2VCzYYT2e
TLSH
T13E84DF1272D048F6E4853633CE76BE74E3F9D0AC5D32DB775F98460D1E36A0992122AD
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/1096-18-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral2/memory/1096-22-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/1096-18-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1096-22-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 IoCs

pid	Process
5052	rfwsn.exe

Executes dropped EXE 2 IoCs

pid	Process
5052	rfwsn.exe
1096	rai.exe

Loads dropped DLL 1 IoCs

pid	Process
1096	rai.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-1-5-21-600123060-2148212387-2211176695-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\ssorq\\rai.exe \"c:\\Program Files\\ssorq\\rairm.dll\",Compliance"	rai.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:	rai.exe
File opened (read-only)	\??\b:	rai.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	rai.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\ssorq	rfwsn.exe
File created	\??\c:\Program Files\ssorq\rairm.dll	rfwsn.exe
File created	\??\c:\Program Files\ssorq\rai.exe	rfwsn.exe
File opened for modification	\??\c:\Program Files\ssorq\rai.exe	rfwsn.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2736	1096	WerFault.exe	83

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	2026-04-16_5d58087f132bf0b447b4715575b896af_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	rfwsn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rai.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
3120	cmd.exe
5744	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5744	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1096	rai.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2952	2026-04-16_5d58087f132bf0b447b4715575b896af_elex_wannacry.exe
5052	rfwsn.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2952 wrote to memory of 3120	2952	2026-04-16_5d58087f132bf0b447b4715575b896af_elex_wannacry.exe	79
PID 3120 wrote to memory of 5744	3120	cmd.exe	81
PID 3120 wrote to memory of 5052	3120	cmd.exe	82
PID 5052 wrote to memory of 1096	5052	rfwsn.exe	83

C:\Users\Admin\AppData\Local\Temp\2026-04-16_5d58087f132bf0b447b4715575b896af_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_5d58087f132bf0b447b4715575b896af_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2952
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\rfwsn.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-16_5d58087f132bf0b447b4715575b896af_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3120
- - 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:5744
- - C:\Users\Admin\AppData\Local\Temp\rfwsn.exe
    C:\Users\Admin\AppData\Local\Temp\\rfwsn.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-16_5d58087f132bf0b447b4715575b896af_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:5052
  - - \??\c:\Program Files\ssorq\rai.exe
      "c:\Program Files\ssorq\rai.exe" "c:\Program Files\ssorq\rairm.dll",Compliance C:\Users\Admin\AppData\Local\Temp\rfwsn.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:1096
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1096 -s 1512
        5⤵
        Program crash
        
        PID:2736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1096 -ip 1096
1⤵
PID:3360

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

rai.exe

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

Submit Download

rfwsn.exe

Path C:\Users\Admin\AppData\Local\Temp\rfwsn.exe
Size 367KB
SHA256 beb9ca840f875d77462c939b8cdafc7da31187b7313e322ba5493a9cfc146508
MD5 59f3a5d3497562a5f541ba5ab6fde726
SHA1 3b897408bd4ec39c37c35b2b7ddb44da7787683d
SHA512 d22e1cdf6a2049adfc6b493edfe86c7b0516697d4cd46c4a54c14e89e0dd89f55fdc09095fb3fedf57103f043a236e2c8cc91ceace8eb50f5f1209009f2e6f8a
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9G:FcirO2PE2QC00me2VCzYYT2E
TLSH
T12384DF1272D048F6E4853633CE76BE74E3E9D0AC5E32DB775F98460D1E36A0993122AD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

rairm.dll

Path \??\c:\Program Files\ssorq\rairm.dll
Size 179KB
SHA256 3dc566ca076b0a1f6acb27abc70832c099d5e1b30bc8cbf6e706e4f359b9a647
MD5 2e2b9779e7e05b6eede546a386cfc354
SHA1 bfb422e2581aea3340da0e56cc17b2b83a25f35d
SHA512 1bdb8b49d04472ab46834ab0d8a1dca075d3b519a6c894747bce726127a9aa57a453e3d834df56016c343191c230a1511199eace4f4718c0193317394f2635b8
SSDEEP 3072:EC5Wpfs98nVCWdKycHtld8VBt7NUalwXH9RqYzJabTYd3KIdj6+uFdi98pvO0hf3:ECOfQ8nVcycHrd8VBtBUa4HfRzJabT8C
TLSH
T1080423EBBE42C652C84F6776B6AF244437AD06D91BC1E0A56F0482CE39C3135E67DE48
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1096-17-0x0000000001230000-0x0000000001231000-memory.dmp

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memory/1096-16-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1096-18-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/1096-19-0x0000000003120000-0x0000000003127000-memory.dmp

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memory/1096-22-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/2952-3-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/2952-2-0x0000000000A30000-0x0000000000AEB000-memory.dmp

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memory/2952-0-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/5052-11-0x00000000009C0000-0x0000000000A7B000-memory.dmp

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memory/5052-12-0x0000000000400000-0x0000000000458000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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