farfli | c68243ae5f04fb90b3f1b695154dbcc8dcc677a2673ad08fe59ef1fbb72d2355

Analysis

max time kernel
148s
max time network
143s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
31/08/2026, 23:23

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General

Target
2026-08-31_0841b1999e3ae62a7f91e1bb8d4fa467_coinminer_elex_wannacry.exe
Size 147KB
Sample260831-3c7msafm4s
SHA256 c68243ae5f04fb90b3f1b695154dbcc8dcc677a2673ad08fe59ef1fbb72d2355
MD5 0841b1999e3ae62a7f91e1bb8d4fa467
SHA1 db2ad40c61aa7c383c07206389e15df4ad2594d4
SHA512 681f5a0591ea4184ea40a4903d750a82f35e723a9de36ec619fc21698b305073ab36ec67f989580b8572717a53db789ece5816b3c4f0fce41274205d48de1590
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKv:Ua/qc9rqzMseNoVv9EJFnM8qKv
TLSH
T11EE3270267F6C194F0B21A34CA3646F08BBABC69FA70921B17447E4EBD31A15ED21777
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/5412-10-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/5412-9-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/5412-11-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/5412-12-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/5412-9-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5412-11-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4812-0-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/memory/4812-2-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/files/0x000c000000016cd6-3.dat	UPX
behavioral2/memory/3348-6-0x0000000000400000-0x0000000000423000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
3	5412	rundll32.exe
7	5412	rundll32.exe
8	5412	rundll32.exe
9	5412	rundll32.exe
14	5412	rundll32.exe
15	5412	rundll32.exe
17	5412	rundll32.exe
19	5412	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3348	koyfg.exe

Executes dropped EXE 1 IoCs

pid	Process
3348	koyfg.exe

Loads dropped DLL 1 IoCs

pid	Process
5412	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-1-5-21-3989226554-2204910950-1522900112-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\ladblc\\zqvsx.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)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\w:	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/4812-0-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/memory/4812-2-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/files/0x000c000000016cd6-3.dat	upx
behavioral2/memory/3348-6-0x0000000000400000-0x0000000000423000-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
4380	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	2026-08-31_0841b1999e3ae62a7f91e1bb8d4fa467_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	koyfg.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
4772	PING.EXE
4380	cmd.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	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4772	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5412	rundll32.exe
5412	rundll32.exe
5412	rundll32.exe
5412	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5412	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4812	2026-08-31_0841b1999e3ae62a7f91e1bb8d4fa467_coinminer_elex_wannacry.exe
3348	koyfg.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4812 wrote to memory of 4380	4812	2026-08-31_0841b1999e3ae62a7f91e1bb8d4fa467_coinminer_elex_wannacry.exe	89
PID 4380 wrote to memory of 4772	4380	cmd.exe	91
PID 4380 wrote to memory of 3348	4380	cmd.exe	92
PID 3348 wrote to memory of 5412	3348	koyfg.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-31_0841b1999e3ae62a7f91e1bb8d4fa467_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-31_0841b1999e3ae62a7f91e1bb8d4fa467_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4812
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\koyfg.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-31_0841b1999e3ae62a7f91e1bb8d4fa467_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:4380
- - 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:4772
- - \??\c:\koyfg.exe
    c:\koyfg.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-31_0841b1999e3ae62a7f91e1bb8d4fa467_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:3348
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\ladblc\zqvsx.dll",init c:\koyfg.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:5412

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

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Downloads

koyfg.exe

Path \??\c:\koyfg.exe
Size 148KB
SHA256 601b22c75be177ace6409e01698f9b41fd942c3e397ac83edad71c44e082436f
MD5 3091fa9b2a6e2629bb07916e52208ec2
SHA1 0694d7afc748d09a6ed66d7a7ada5f38b6b1dacd
SHA512 56c279dcb5eadbb6edb41930ef5383d14be90914e5699d8607ecd020442a6577262ff42df0f2c3ecac4cc1d39986d5edc7846fa9fa2032702721e08f34a5a6f4
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKvi:Ua/qc9rqzMseNoVv9EJFnM8qKvi
TLSH
T1DFE3270267F6C194F0B21A34CA3646F08BBABC69FA70921B17447E4EBD31A15ED21777
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

zqvsx.dll

Path \??\c:\ladblc\zqvsx.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

memory/3348-6-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/4812-0-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/4812-2-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/5412-10-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/5412-9-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/5412-11-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/5412-12-0x0000000010001000-0x0000000010021000-memory.dmp

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