farfli | 781d944c2013a49a8bae5de36bd5bf097a88e1f56c7fc7bd583a3b14b04a5be6

Analysis

max time kernel
148s
max time network
138s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
06/08/2026, 05:09

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General

Target
2026-08-06_c96adea73540f26c1f32f582e03da2cf_coinminer_elex_wannacry.exe
Size 155KB
Sample260806-ftacaatdng
SHA256 781d944c2013a49a8bae5de36bd5bf097a88e1f56c7fc7bd583a3b14b04a5be6
MD5 c96adea73540f26c1f32f582e03da2cf
SHA1 841984876ea8a0343c3959aab49504256fd5848d
SHA512 a12a1eaa74cbae9e7a41fb4e491c3db6b12670dc4127b8c834de153c9448a0e997e4c7e8160ae44121ef4a4f9ea5f9b99bec6bb1aef7140f24de936bd2fccb10
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKvM:Ua/qc9rqzMseNoVv9EJFnM8qKvM
TLSH
T16FF3270267F6C194F0B31E34DA3646F08BA6BC59FA70922B13847E4EBD31A15ED21776
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer upx

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 4 IoCs

resource	yara_rule
behavioral2/memory/1572-10-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/1572-9-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/1572-11-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/1572-12-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/1572-9-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1572-11-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4536-0-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/memory/4536-2-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/files/0x0008000000016ca8-3.dat	UPX
behavioral2/memory/5980-6-0x0000000000400000-0x0000000000423000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
5	1572	rundll32.exe
10	1572	rundll32.exe
11	1572	rundll32.exe
12	1572	rundll32.exe
13	1572	rundll32.exe
14	1572	rundll32.exe
17	1572	rundll32.exe
19	1572	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5980	tunnsir.exe

Executes dropped EXE 1 IoCs

pid	Process
5980	tunnsir.exe

Loads dropped DLL 1 IoCs

pid	Process
1572	rundll32.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-1-5-21-3986082593-3624157295-3514260330-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\pucsi\\ywdkp.dll\",init"	rundll32.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:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.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	rundll32.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4536-0-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/memory/4536-2-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/files/0x0008000000016ca8-3.dat	upx
behavioral2/memory/5980-6-0x0000000000400000-0x0000000000423000-memory.dmp	upx

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
4912	cmd.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	2026-08-06_c96adea73540f26c1f32f582e03da2cf_coinminer_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	tunnsir.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
4912	cmd.exe
3384	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3384	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1572	rundll32.exe
1572	rundll32.exe
1572	rundll32.exe
1572	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1572	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4536	2026-08-06_c96adea73540f26c1f32f582e03da2cf_coinminer_elex_wannacry.exe
5980	tunnsir.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4536 wrote to memory of 4912	4536	2026-08-06_c96adea73540f26c1f32f582e03da2cf_coinminer_elex_wannacry.exe	89
PID 4912 wrote to memory of 3384	4912	cmd.exe	91
PID 4912 wrote to memory of 5980	4912	cmd.exe	92
PID 5980 wrote to memory of 1572	5980	tunnsir.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-06_c96adea73540f26c1f32f582e03da2cf_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-06_c96adea73540f26c1f32f582e03da2cf_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\tunnsir.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-06_c96adea73540f26c1f32f582e03da2cf_coinminer_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:4912
- - 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:3384
- - \??\c:\tunnsir.exe
    c:\tunnsir.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-06_c96adea73540f26c1f32f582e03da2cf_coinminer_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5980
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\pucsi\ywdkp.dll",init c:\tunnsir.exe
      4⤵
      Badlisted process makes network request
      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:1572

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

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

ywdkp.dll

Path \??\c:\pucsi\ywdkp.dll
Size 50KB
SHA256 a632527bcd457c9a4cfce83e7a9a675baff790b0279de5d8ea3192dfb2dd888a
MD5 ab32c5bfd7ecfbe9ed733dfb81210933
SHA1 4d5c6e7a0031691f12e78b096ff928b0d55bdfab
SHA512 59b971146292074d76d23d5f26889108f4d6e33804332449f4c589bf8a8d53e37ac8dfea47e9d3c5ae0f382ae1acf25c4968bea87b3f5ff9d51f2274229c1ab5
SSDEEP 1536:mrrG57ZqLLpf+Xz+HOtygmRnO/x5Rq8Gm:mwKGqutWM/x281
TLSH
T12033F1F4EFB4E067ECBA5F743E6A6215DA727B10C63188EA518090135F335CACA18717
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tunnsir.exe

Path \??\c:\tunnsir.exe
Size 155KB
SHA256 40d97f9ed7465e4ffbb5d50e43424b44080af8d7e08882e77393c79406d8cafd
MD5 2350e8c46e5cab936bbd036a9c85980d
SHA1 7ccb99a5ed632bfd2924e4acda913250c48ba8fd
SHA512 7fb1051d6a2abf7c76a05980273f1590319c71b756750d770e5b321f4cfae8375d6bfe4575c321113d5d7a54d4337f75b74ac958b3253d0d7f7717cd2627b1ef
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKvU:Ua/qc9rqzMseNoVv9EJFnM8qKvU
TLSH
T1DCF3270267F6C194F0B31E34DA3646F08BA6BC59FA70922B13847E4EBD31A15ED21776
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1572-10-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/1572-9-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/1572-11-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/1572-12-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/4536-0-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/4536-2-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/5980-6-0x0000000000400000-0x0000000000423000-memory.dmp

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