farfli | 3e479cc24e884a371726f409c82023d3cb8c56dada1f99c7a30c22baae986570

Analysis

max time kernel
150s
max time network
152s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
17/08/2026, 13:06

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General

Target
2026-08-17_76b356d38a6984476d72315bb2868e21_coinminer_elex_wannacry.exe
Size 412KB
Sample260817-qcdcqa11a1
SHA256 3e479cc24e884a371726f409c82023d3cb8c56dada1f99c7a30c22baae986570
MD5 76b356d38a6984476d72315bb2868e21
SHA1 41df9f05f7d310fbb2abd628aa80a27bee23f800
SHA512 16b71eafe95e0c3603f5535b46a28f3fc0d3761f6531b9835439f7022410c3ca31e0e8db607a26612d56ee448ec27f3130cd5fa9724935afef2c46f0b6cb7823
SSDEEP 6144:qKgGmTBsuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F19S:UGmTau+mMC4ITJE8dfSJ/F1
TLSH
T1B094D02272D08BA3C1866032CD66EA7CD3E5CD689C705E3773E9F65DEE36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer

Malware Config

Signatures

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

Detects Farfli Backdoor 3 IoCs

resource	yara_rule
behavioral2/memory/3084-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/3084-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/3084-13-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/3084-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3084-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3084-13-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2204-0-0x0000000000400000-0x0000000000492000-memory.dmp	UPX
behavioral2/memory/2204-2-0x0000000000400000-0x0000000000492000-memory.dmp	UPX
behavioral2/files/0x0009000000016cd6-3.dat	UPX
behavioral2/memory/3048-6-0x0000000000400000-0x0000000000492000-memory.dmp	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
3	3084	rundll32.exe
6	3084	rundll32.exe
7	3084	rundll32.exe
12	3084	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3048	bjyhx.exe

Executes dropped EXE 1 IoCs

pid	Process
3048	bjyhx.exe

Loads dropped DLL 1 IoCs

pid	Process
3084	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\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\nimjrbmu\\ayvvadz.dll\",InitEngine"	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	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

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\nimjrbmu	bjyhx.exe
File created	\??\c:\Program Files\nimjrbmu\ayvvadz.dll	bjyhx.exe

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
3420	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-17_76b356d38a6984476d72315bb2868e21_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	bjyhx.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
3420	cmd.exe
4376	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	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
4376	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3084	rundll32.exe
3084	rundll32.exe
3084	rundll32.exe
3084	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3084	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2204	2026-08-17_76b356d38a6984476d72315bb2868e21_coinminer_elex_wannacry.exe
3048	bjyhx.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 3420	2204	2026-08-17_76b356d38a6984476d72315bb2868e21_coinminer_elex_wannacry.exe	89
PID 3420 wrote to memory of 4376	3420	cmd.exe	91
PID 3420 wrote to memory of 3048	3420	cmd.exe	92
PID 3048 wrote to memory of 3084	3048	bjyhx.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-17_76b356d38a6984476d72315bb2868e21_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-17_76b356d38a6984476d72315bb2868e21_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\bjyhx.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-17_76b356d38a6984476d72315bb2868e21_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:3420
- - 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:4376
- - C:\Users\Admin\AppData\Local\Temp\bjyhx.exe
    C:\Users\Admin\AppData\Local\Temp\\bjyhx.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-17_76b356d38a6984476d72315bb2868e21_coinminer_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:3048
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\nimjrbmu\ayvvadz.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\bjyhx.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:3084

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

bjyhx.exe

Path C:\Users\Admin\AppData\Local\Temp\bjyhx.exe
Size 413KB
SHA256 b9b1bc941a03fd804eb0e7a4ed378c3af4fa52e21c9b74690d23d2f725caa002
MD5 7be5f4068efabf97b5a836d1f69451d7
SHA1 8f907e972c13ce9fc9ff5c3b28a6395c0e1a6c2d
SHA512 a800556c8c7b0f421662a5796c840aa0e25ac1c58deb58149c7b8d6ec69ccc16bface2343db2e571cf8cc744e446d1496cbee41d4f6b500a74cf3ed053b9d8b0
SSDEEP 6144:qKgGmTBsuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F19S:UGmTau+mMC4ITJE8dfSJ/F1
TLSH
T10F94D02272D08BA3C1866032CD66EA7CD3E5CD689C705E3773E9F65DEE36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ayvvadz.dll

Path \??\c:\Program Files\nimjrbmu\ayvvadz.dll
Size 176KB
SHA256 7874e6ffaed488d28ed715a9fa6ffbed48ba9c017e5a33455c9b1d9c31b58987
MD5 be462a11411d6dcd7d13edd849628100
SHA1 674571a7447d8d58fc6275408dc948367a5dacea
SHA512 0f8af54dc9885046318f26869b37682ea587752f1fadd44835d62589a9e0107d5a592f3bcf6a569f0cae77ca416a97706c9c9b800db72353068abe7edd51c60e
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocy:1Jv2tOItshGYdMnYYVjasKbOWSFofy
TLSH
T12A041261862D1C34C087B3717B05920DF6B452A49079CBD3F7B8AF2B3D12AEA806E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2204-0-0x0000000000400000-0x0000000000492000-memory.dmp

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memory/2204-2-0x0000000000400000-0x0000000000492000-memory.dmp

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memory/3048-6-0x0000000000400000-0x0000000000492000-memory.dmp

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memory/3084-9-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/3084-10-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/3084-11-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/3084-13-0x0000000010000000-0x0000000010067000-memory.dmp

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