farfli | 160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
18/04/2026, 10:06

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe
Size 101KB
Sample260418-l5hexscw21
SHA256 160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d
MD5 69270f68c182a27aae475f9d359029e3
SHA1 c8c5dbe140192c45e964ecba90c049e53ee94099
SHA512 385d59f9d6c3e4dac8c8d76cc1434c9f7e0be03dcb46a0ad0a7d201eb2da7d81f8717b109256328d617ba3f0188e8f047ba308f8d1d267b062e92393b858a0da
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48:piAXaKDeKNnD36cb8tI8
TLSH
T18CA39D42ABF087A1E0619DB506735B629E73FC2B193482277BD6B70EAC34F40EE25355
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer

Malware Config

Signatures

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

Detects Farfli Backdoor 4 IoCs

resource	yara_rule
behavioral1/memory/4780-11-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral1/memory/4780-10-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/4780-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/4780-15-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Badlisted process makes network request 15 IoCs

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

flow	pid	Process
11	4780	rundll32.exe
12	4780	rundll32.exe
13	4780	rundll32.exe
14	4780	rundll32.exe
20	4780	rundll32.exe
23	4780	rundll32.exe
24	4780	rundll32.exe
26	4780	rundll32.exe
29	4780	rundll32.exe
36	4780	rundll32.exe
39	4780	rundll32.exe
43	4780	rundll32.exe
53	4780	rundll32.exe
54	4780	rundll32.exe
59	4780	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2868	etjezoe.exe

Executes dropped EXE 1 IoCs

pid	Process
2868	etjezoe.exe

Loads dropped DLL 1 IoCs

pid	Process
4780	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-1-5-21-1609746302-1884177235-1125644204-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\ksrzuh\\bgtac.dll\",GetWindowClass"	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)	\??\t:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\q:	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

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	160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.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	etjezoe.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
864	cmd.exe
1804	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
1804	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4780	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4696	160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe
2868	etjezoe.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4696 wrote to memory of 864	4696	160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe	84
PID 864 wrote to memory of 1804	864	cmd.exe	86
PID 864 wrote to memory of 2868	864	cmd.exe	87
PID 2868 wrote to memory of 4780	2868	etjezoe.exe	88

C:\Users\Admin\AppData\Local\Temp\160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe
"C:\Users\Admin\AppData\Local\Temp\160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4696
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\etjezoe.exe "C:\Users\Admin\AppData\Local\Temp\160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:864
- - 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:1804
- - \??\c:\etjezoe.exe
    c:\etjezoe.exe "C:\Users\Admin\AppData\Local\Temp\160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2868
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\ksrzuh\bgtac.dll",GetWindowClass c:\etjezoe.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:4780

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

Replay Monitor

Loading Replay Monitor...

Downloads

etjezoe.exe

Path C:\etjezoe.exe
Size 101KB
SHA256 3f95cfde85a85e55e6ca0d4752ee5fbef41c3358767bae01dbd50a7fba20f3a5
MD5 3af81709785416449f2edaacf6505aa0
SHA1 772ab273f5e560e4eec0cb2317b795704da64238
SHA512 ea804d2f4b97154cafc94ee9563e75c48ac974f82aa014481f7e22c4c2b6482a7b40fc793f35b6f4bb24f0b64023c24e1fb4c54b028f49140e9f07a58c25ce8c
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48C:piAXaKDeKNnD36cb8tI8C
TLSH
T1B6A3AE42ABF087A1E0619DB506735B629E73FC2A193482277BD6B70EEC34F40EE25355
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

bgtac.dll

Path \??\c:\ksrzuh\bgtac.dll
Size 46KB
SHA256 f57f9e54f4774c2b944fb070ae0c2a02cbb4b7686ab3207544c3ccaff0ff3dd9
MD5 a3fd41430ddcaa55fde840788925406a
SHA1 dbdd87f5c1bbf6a6f44c2e2c4744675d5e4e75c2
SHA512 23109572cfc9a282ea3ec84d93bfe02303d27f365ad2d9f47f6234f91da14c64f80133cc5e49746dfcb65d2454b7e7c13eff59ba4bbc18e09d2fb1c630ba59c9
SSDEEP 768:2sUfnvxs6iLlhpfFPtnQf7kifD/v7yb9Bh7Cb0VQJojZC/xjTk:2sJT1qf4W/vub9nnV1jZC/xE
TLSH
T19D2302C8A6F08EF3D2F90B7980E046DCDCFDB939877381150566008E7C71057FA446AA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2868-7-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/4696-0-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/4696-2-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/4780-11-0x0000000010001000-0x000000001001E000-memory.dmp

Download

memory/4780-10-0x0000000010000000-0x000000001002E000-memory.dmp

Download

memory/4780-12-0x0000000010000000-0x000000001002E000-memory.dmp

Download

memory/4780-13-0x0000000001100000-0x000000000113B000-memory.dmp

Download

memory/4780-15-0x0000000010001000-0x000000001001E000-memory.dmp

Download

memory/4780-14-0x0000000001180000-0x0000000001199000-memory.dmp

Download