farfli | a287543c0b3350b6bd1ff46fae6455a9f3ed642d329774b669d8488f982062a2

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
09/05/2026, 09:49

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General

Target
a287543c0b3350b6bd1ff46fae6455a9f3ed642d329774b669d8488f982062a2.exe
Size 101KB
Sample260509-ltsrhset4t
SHA256 a287543c0b3350b6bd1ff46fae6455a9f3ed642d329774b669d8488f982062a2
MD5 816ae0d1ee68f4f449aad74fca7a9bed
SHA1 ee41719b07c95685cb9785c218a64587f7a26656
SHA512 f7011affd7f8d3c8c24a68f3d3956ca933a80986959c94e4c6e087de734d0a8c606529500adc0ef437a22e4ce341d6665515137b64d0c04dfdd16a4fd3bf0e57
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48X:piAXaKDeKNnD36cb8tI8X
TLSH
T122A3AE42ABF087A1E0619DB506735B629E73FC2B193482677BD6B70EAC34F40EE21355
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/5220-13-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/5220-14-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral1/memory/5220-15-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/5220-17-0x0000000010001000-0x000000001001E000-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
7	5220	rundll32.exe
8	5220	rundll32.exe
9	5220	rundll32.exe
10	5220	rundll32.exe
11	5220	rundll32.exe
18	5220	rundll32.exe
19	5220	rundll32.exe
35	5220	rundll32.exe
42	5220	rundll32.exe
44	5220	rundll32.exe
46	5220	rundll32.exe
48	5220	rundll32.exe
51	5220	rundll32.exe
56	5220	rundll32.exe
59	5220	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5888	cubfb.exe

Executes dropped EXE 1 IoCs

pid	Process
5888	cubfb.exe

Loads dropped DLL 1 IoCs

pid	Process
5220	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-1-5-21-312252282-3884318443-358092420-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\ubawt\\mdytp.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)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	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)	\??\l:	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\h:	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cubfb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a287543c0b3350b6bd1ff46fae6455a9f3ed642d329774b669d8488f982062a2.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
4060	cmd.exe
5960	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
5960	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5220	rundll32.exe
5220	rundll32.exe
5220	rundll32.exe
5220	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5220	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4240	a287543c0b3350b6bd1ff46fae6455a9f3ed642d329774b669d8488f982062a2.exe
5888	cubfb.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4240 wrote to memory of 4060	4240	a287543c0b3350b6bd1ff46fae6455a9f3ed642d329774b669d8488f982062a2.exe	85
PID 4060 wrote to memory of 5960	4060	cmd.exe	87
PID 4060 wrote to memory of 5888	4060	cmd.exe	88
PID 5888 wrote to memory of 5220	5888	cubfb.exe	89

C:\Users\Admin\AppData\Local\Temp\a287543c0b3350b6bd1ff46fae6455a9f3ed642d329774b669d8488f982062a2.exe
"C:\Users\Admin\AppData\Local\Temp\a287543c0b3350b6bd1ff46fae6455a9f3ed642d329774b669d8488f982062a2.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4240
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\cubfb.exe "C:\Users\Admin\AppData\Local\Temp\a287543c0b3350b6bd1ff46fae6455a9f3ed642d329774b669d8488f982062a2.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4060
- - 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:5960
- - \??\c:\cubfb.exe
    c:\cubfb.exe "C:\Users\Admin\AppData\Local\Temp\a287543c0b3350b6bd1ff46fae6455a9f3ed642d329774b669d8488f982062a2.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5888
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\ubawt\mdytp.dll",GetWindowClass c:\cubfb.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:5220

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

cubfb.exe

Path C:\cubfb.exe
Size 102KB
SHA256 a87d495280da229a56e935d00b23d5dadc95852043c268c961438d1d3f109ecf
MD5 2127b86dc7eff6deaddf10fcf0d000ba
SHA1 f1291c041763d9ceb114366fbf75f49f3fe46da0
SHA512 9421633f73415130bdf7100e29325883fb9e4f9ff9dca72e793c2f227647d5bfdea5330f12f82bf0138adaae832d018b8df30f60e91c9ccfb0c9ded2435e71da
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX480:piAXaKDeKNnD36cb8tI80
TLSH
T1BEA3AE42ABF087A1E0619DB506735B629E73FC2A193482277BD6B70EAC34F40EE25355
MD5 SHA1 SHA512 SSDEEP TLSH

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mdytp.dll

Path \??\c:\ubawt\mdytp.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/4240-3-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4240-2-0x0000000000940000-0x00000000009FF000-memory.dmp

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memory/4240-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/5220-14-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/5220-13-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/5220-15-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/5220-17-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/5220-16-0x00000000004D0000-0x000000000058F000-memory.dmp

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memory/5220-20-0x00000000004D0000-0x000000000058F000-memory.dmp

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memory/5220-24-0x00000000004D0000-0x000000000058F000-memory.dmp

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memory/5888-10-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/5888-9-0x0000000000760000-0x000000000081F000-memory.dmp

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memory/5888-7-0x0000000000400000-0x000000000041A000-memory.dmp

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