farfli | d8104e416069e11a886663401e93b636a445db137d53cd836cf8f5a644b64385

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
21/04/2026, 11:14

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General

Target
d8104e416069e11a886663401e93b636a445db137d53cd836cf8f5a644b64385.exe
Size 102KB
Sample260421-ncawgsgy21
SHA256 d8104e416069e11a886663401e93b636a445db137d53cd836cf8f5a644b64385
MD5 749c2f00a29bcbb4dfd80ee4e9994847
SHA1 d4dc40ad7016d9a4ee760a9dc79b9a6ddc6e3310
SHA512 8780a81b24386e99c1248d7424389362c2b82e56bd4f59aab1470a130464aad48f07543677e4a3d7b7863bf4bde004f4ab225320dbb0e940edfa24bdf9b6d0b7
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48:piAXaKDeKNnD36cb8tI8
TLSH
T184A3AD42ABF08661E06199B506735B629EB3FC2B193482677BD7B70EAC34F40EE21355
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/4884-10-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/4884-11-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral1/memory/4884-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/4884-13-0x0000000010001000-0x000000001001E000-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
10	4884	rundll32.exe
11	4884	rundll32.exe
12	4884	rundll32.exe
13	4884	rundll32.exe
14	4884	rundll32.exe
18	4884	rundll32.exe
29	4884	rundll32.exe
33	4884	rundll32.exe
40	4884	rundll32.exe
42	4884	rundll32.exe
51	4884	rundll32.exe
54	4884	rundll32.exe
57	4884	rundll32.exe
58	4884	rundll32.exe
59	4884	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4808	mogtsti.exe

Executes dropped EXE 1 IoCs

pid	Process
4808	mogtsti.exe

Loads dropped DLL 1 IoCs

pid	Process
4884	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:\\extuocvv\\vjwcn.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)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	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)	\??\k:	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	mogtsti.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d8104e416069e11a886663401e93b636a445db137d53cd836cf8f5a644b64385.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
4412	PING.EXE
4440	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
4412	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4884	rundll32.exe
4884	rundll32.exe
4884	rundll32.exe
4884	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4884	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
8	d8104e416069e11a886663401e93b636a445db137d53cd836cf8f5a644b64385.exe
4808	mogtsti.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 8 wrote to memory of 4440	8	d8104e416069e11a886663401e93b636a445db137d53cd836cf8f5a644b64385.exe	85
PID 4440 wrote to memory of 4412	4440	cmd.exe	87
PID 4440 wrote to memory of 4808	4440	cmd.exe	88
PID 4808 wrote to memory of 4884	4808	mogtsti.exe	89

C:\Users\Admin\AppData\Local\Temp\d8104e416069e11a886663401e93b636a445db137d53cd836cf8f5a644b64385.exe
"C:\Users\Admin\AppData\Local\Temp\d8104e416069e11a886663401e93b636a445db137d53cd836cf8f5a644b64385.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:8
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\mogtsti.exe "C:\Users\Admin\AppData\Local\Temp\d8104e416069e11a886663401e93b636a445db137d53cd836cf8f5a644b64385.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4440
- - 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:4412
- - \??\c:\mogtsti.exe
    c:\mogtsti.exe "C:\Users\Admin\AppData\Local\Temp\d8104e416069e11a886663401e93b636a445db137d53cd836cf8f5a644b64385.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4808
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\extuocvv\vjwcn.dll",GetWindowClass c:\mogtsti.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:4884

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

mogtsti.exe

Path C:\mogtsti.exe
Size 102KB
SHA256 f85c70d67dbcb1bc71707c0643eb1a317677515491e37cae1b81b24232595f37
MD5 f18e5a8369fa4bbce53388af2bcffeed
SHA1 20cfea89f590cd6ea01fc294c0edb1b21e0d91f9
SHA512 2cb25097970f949550b264f22dffa95e3eb73da839f59183bfd2a2e85daf3039d0be8a159206011cd00ed6c2c0e222adb504401dc83315509d6821e3b21d1a9f
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX487:piAXaKDeKNnD36cb8tI87
TLSH
T10DA3AD42ABF08761E06199B506735B629EB3FC2B193483277BD6B70EAC34F40EE21355
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

vjwcn.dll

Path \??\c:\extuocvv\vjwcn.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

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memory/8-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/8-2-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4808-7-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4884-10-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4884-11-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4884-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4884-13-0x0000000010001000-0x000000001001E000-memory.dmp

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