farfli | 801beaf3dfbbb1522e20f09d3ed8e3288e01953232260bf0984c3f401dd040dd

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
29/04/2026, 11:34

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General

Target
801beaf3dfbbb1522e20f09d3ed8e3288e01953232260bf0984c3f401dd040dd.exe
Size 115KB
Sample260429-npg6bsfs2m
SHA256 801beaf3dfbbb1522e20f09d3ed8e3288e01953232260bf0984c3f401dd040dd
MD5 86576b192a153b1d23b792a1ef401570
SHA1 13333d8160eba414001718dfb5dd70c801a03fac
SHA512 56784941e88e0b9c79b7b78923ffa749e5328fc34c2850ac82ca31a5838e2e4f1f962819f5bd075a89650a086dd2b6a7e87de61f31ab27f58bdf8ee5e6f9b894
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4:piAXaKDeKNnD36cb8tI
TLSH
T1C9C39E12ABF0C6A5E0665CB5067757219AB2FC1A2924832777D6B70FEC30F04EE253A5
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/4668-10-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/4668-11-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral1/memory/4668-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/4668-15-0x0000000010001000-0x000000001001E000-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	4668	rundll32.exe
12	4668	rundll32.exe
13	4668	rundll32.exe
16	4668	rundll32.exe
18	4668	rundll32.exe
21	4668	rundll32.exe
32	4668	rundll32.exe
36	4668	rundll32.exe
40	4668	rundll32.exe
41	4668	rundll32.exe
46	4668	rundll32.exe
49	4668	rundll32.exe
53	4668	rundll32.exe
54	4668	rundll32.exe
55	4668	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4496	gzmjj.exe

Executes dropped EXE 1 IoCs

pid	Process
4496	gzmjj.exe

Loads dropped DLL 1 IoCs

pid	Process
4668	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-1-5-21-721190819-434563495-2007910846-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\tvwdju\\hkwbz.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)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gzmjj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	801beaf3dfbbb1522e20f09d3ed8e3288e01953232260bf0984c3f401dd040dd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
4316	cmd.exe
3468	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
3468	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4668	rundll32.exe
4668	rundll32.exe
4668	rundll32.exe
4668	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4668	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4656	801beaf3dfbbb1522e20f09d3ed8e3288e01953232260bf0984c3f401dd040dd.exe
4496	gzmjj.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4656 wrote to memory of 4316	4656	801beaf3dfbbb1522e20f09d3ed8e3288e01953232260bf0984c3f401dd040dd.exe	84
PID 4316 wrote to memory of 3468	4316	cmd.exe	86
PID 4316 wrote to memory of 4496	4316	cmd.exe	88
PID 4496 wrote to memory of 4668	4496	gzmjj.exe	89

C:\Users\Admin\AppData\Local\Temp\801beaf3dfbbb1522e20f09d3ed8e3288e01953232260bf0984c3f401dd040dd.exe
"C:\Users\Admin\AppData\Local\Temp\801beaf3dfbbb1522e20f09d3ed8e3288e01953232260bf0984c3f401dd040dd.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4656
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\gzmjj.exe "C:\Users\Admin\AppData\Local\Temp\801beaf3dfbbb1522e20f09d3ed8e3288e01953232260bf0984c3f401dd040dd.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4316
- - 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:3468
- - \??\c:\gzmjj.exe
    c:\gzmjj.exe "C:\Users\Admin\AppData\Local\Temp\801beaf3dfbbb1522e20f09d3ed8e3288e01953232260bf0984c3f401dd040dd.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4496
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\tvwdju\hkwbz.dll",GetWindowClass c:\gzmjj.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:4668

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

gzmjj.exe

Path C:\gzmjj.exe
Size 116KB
SHA256 bdd2e6290b9d35ba4d3d20d60208a9cbb3b617ba7002ca84b1c8495fb048c55d
MD5 9405a4928f9de4bdba0d79b7c99c2e78
SHA1 ad23af23890bd58b736d51eae86bcb802a864301
SHA512 0d553a7f64b321e469cc33968b78294ae73cbf808ab0b95ce80c75ecc6c14412f585739ef6d4a8752cc08af783277d73360eb52944eefd876c8d567620f4185b
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4y:piAXaKDeKNnD36cb8tIy
TLSH
T1C2C3AE12ABF0C6A5E0665CB5077757219AB2FC1A2924832777D6B70FEC30F04EE253A5
MD5 SHA1 SHA512 SSDEEP TLSH

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hkwbz.dll

Path \??\c:\tvwdju\hkwbz.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/4496-7-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4656-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4656-2-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4668-10-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4668-11-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4668-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4668-13-0x0000000000F90000-0x0000000000F96000-memory.dmp

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memory/4668-15-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4668-14-0x0000000003C70000-0x0000000003CCF000-memory.dmp

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