farfli | 27472c9029535906b18b631d5d9662ede3731f183ea42cecb22e78e441ce616e

Analysis

max time kernel
150s
max time network
145s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
28/05/2026, 05:19

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General

Target
27472c9029535906b18b631d5d9662ede3731f183ea42cecb22e78e441ce616e.exe
Size 103KB
Sample260528-fzyxtshv21
SHA256 27472c9029535906b18b631d5d9662ede3731f183ea42cecb22e78e441ce616e
MD5 afdd18f80c41ae5b911bb47e1269fa8b
SHA1 297d3fc9b215bcaaff3ca69c19502de6ed3f6008
SHA512 34a2d4d75764196c1ca0c24fced75d1ffe3c162d91ff3bb9a287128ba6764bd6dfa01fbd064c3f721156bbfe40b1295fd6fdcfb7ea2a00cff89edb4890c02766
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48r:piAXaKDeKNnD36cb8tI8r
TLSH
T1CFA39D42ABF087A1E0619DB506735B629E73FC2B193482277BD6B70EAC34F40EE25355
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
behavioral2/memory/3972-10-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/3972-11-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral2/memory/3972-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/3972-13-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
1	3972	rundll32.exe
2	3972	rundll32.exe
3	3972	rundll32.exe
4	3972	rundll32.exe
5	3972	rundll32.exe
6	3972	rundll32.exe
7	3972	rundll32.exe
8	3972	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3272	owttf.exe

Executes dropped EXE 1 IoCs

pid	Process
3272	owttf.exe

Loads dropped DLL 1 IoCs

pid	Process
3972	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-1-5-21-1636999435-3883760687-346127294-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\qjhuwd\\uazee.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)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\a:	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)	\??\m:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	27472c9029535906b18b631d5d9662ede3731f183ea42cecb22e78e441ce616e.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	owttf.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
992	cmd.exe
1284	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
1284	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3972	rundll32.exe
3972	rundll32.exe
3972	rundll32.exe
3972	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3972	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2560	27472c9029535906b18b631d5d9662ede3731f183ea42cecb22e78e441ce616e.exe
3272	owttf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2560 wrote to memory of 992	2560	27472c9029535906b18b631d5d9662ede3731f183ea42cecb22e78e441ce616e.exe	80
PID 992 wrote to memory of 1284	992	cmd.exe	82
PID 992 wrote to memory of 3272	992	cmd.exe	83
PID 3272 wrote to memory of 3972	3272	owttf.exe	84

C:\Users\Admin\AppData\Local\Temp\27472c9029535906b18b631d5d9662ede3731f183ea42cecb22e78e441ce616e.exe
"C:\Users\Admin\AppData\Local\Temp\27472c9029535906b18b631d5d9662ede3731f183ea42cecb22e78e441ce616e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2560
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\owttf.exe "C:\Users\Admin\AppData\Local\Temp\27472c9029535906b18b631d5d9662ede3731f183ea42cecb22e78e441ce616e.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:992
- - 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:1284
- - \??\c:\owttf.exe
    c:\owttf.exe "C:\Users\Admin\AppData\Local\Temp\27472c9029535906b18b631d5d9662ede3731f183ea42cecb22e78e441ce616e.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3272
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\qjhuwd\uazee.dll",GetWindowClass c:\owttf.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:3972

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

owttf.exe

Path C:\owttf.exe
Size 103KB
SHA256 6d2f13b9c13e029fbc185092859e4b85c18e4782b17db18c5bef8d8fa2eb95db
MD5 8e45781c35885c549c620a38be2785e8
SHA1 eae98c7adf185d907ee1ba95d02bd1676d66ba3c
SHA512 4a0f838b37c1b2c76f687b2081cd3d83074f89733d4ed5edec0923e7b359f924f15f8e8b277555c2ad23b6fb981d59d0756d9758d61f7b9e82b4fb2ea4038bb3
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48S:piAXaKDeKNnD36cb8tI8S
TLSH
T13BA39E42ABF087A1E0615DB506735B629E72FC2B193482277BD6B70EEC34F40EE25355
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

uazee.dll

Path \??\c:\qjhuwd\uazee.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/2560-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/2560-2-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/3272-7-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/3972-10-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/3972-11-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/3972-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/3972-13-0x0000000010001000-0x000000001001E000-memory.dmp

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