farfli | 86a1c20d68ebd8d3cb120b7ddcab0833244b1996d28d11e526e2ef697d588556

Analysis

max time kernel
149s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
07/05/2026, 02:49

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General

Target
86a1c20d68ebd8d3cb120b7ddcab0833244b1996d28d11e526e2ef697d588556.exe
Size 101KB
Sample260507-dbbraaes7t
SHA256 86a1c20d68ebd8d3cb120b7ddcab0833244b1996d28d11e526e2ef697d588556
MD5 9b810dff6d5d05582307e32a95d4f83d
SHA1 33a3611a9490a06e9125fb10a298942e8f4b9f06
SHA512 d0ef40dd7f5cb3417b5abeb5516da2e434ba3e554641c8a50215ee47064735ff661984c512a81349982a0dc10c5e09df3569820b934251dae85a2008dd1b11e2
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48b:piAXaKDeKNnD36cb8tI8b
TLSH
T179A39D42ABF087A1E0619CB506735B629E73FC2B193482677BD6B60EEC34F40EE25355
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/5020-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/5020-13-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral2/memory/5020-14-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/5020-16-0x0000000010001000-0x000000001001E000-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
1	5020	rundll32.exe
2	5020	rundll32.exe
3	5020	rundll32.exe
4	5020	rundll32.exe
5	5020	rundll32.exe
6	5020	rundll32.exe
7	5020	rundll32.exe
8	5020	rundll32.exe
9	5020	rundll32.exe
10	5020	rundll32.exe
13	5020	rundll32.exe
14	5020	rundll32.exe
15	5020	rundll32.exe
16	5020	rundll32.exe
17	5020	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4232	rdwkw.exe

Executes dropped EXE 1 IoCs

pid	Process
4232	rdwkw.exe

Loads dropped DLL 1 IoCs

pid	Process
5020	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-1-5-21-2397528088-2630719772-1129911217-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\ptcit\\cccaglvh.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)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	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)	\??\o:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	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	86a1c20d68ebd8d3cb120b7ddcab0833244b1996d28d11e526e2ef697d588556.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	rdwkw.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
3896	cmd.exe
4944	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
4944	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5020	rundll32.exe
5020	rundll32.exe
5020	rundll32.exe
5020	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5020	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4772	86a1c20d68ebd8d3cb120b7ddcab0833244b1996d28d11e526e2ef697d588556.exe
4232	rdwkw.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4772 wrote to memory of 3896	4772	86a1c20d68ebd8d3cb120b7ddcab0833244b1996d28d11e526e2ef697d588556.exe	79
PID 3896 wrote to memory of 4944	3896	cmd.exe	81
PID 3896 wrote to memory of 4232	3896	cmd.exe	82
PID 4232 wrote to memory of 5020	4232	rdwkw.exe	83

C:\Users\Admin\AppData\Local\Temp\86a1c20d68ebd8d3cb120b7ddcab0833244b1996d28d11e526e2ef697d588556.exe
"C:\Users\Admin\AppData\Local\Temp\86a1c20d68ebd8d3cb120b7ddcab0833244b1996d28d11e526e2ef697d588556.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4772
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\rdwkw.exe "C:\Users\Admin\AppData\Local\Temp\86a1c20d68ebd8d3cb120b7ddcab0833244b1996d28d11e526e2ef697d588556.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3896
- - 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:4944
- - \??\c:\rdwkw.exe
    c:\rdwkw.exe "C:\Users\Admin\AppData\Local\Temp\86a1c20d68ebd8d3cb120b7ddcab0833244b1996d28d11e526e2ef697d588556.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4232
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\ptcit\cccaglvh.dll",GetWindowClass c:\rdwkw.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:5020

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

rdwkw.exe

Path C:\rdwkw.exe
Size 101KB
SHA256 ac399f8915b0fa75b85801b89ea153ca4a9d1cdbe1c8f3261479a2250413d168
MD5 b66a65572ddca9c756860839ae698a32
SHA1 60945b49b1d2088f9c257ccb1cabe79fcaa31f93
SHA512 3dfde3c6f2add0fe81014f16dc6e6aeef0fcfc3479452d00f166c648bc7bb7732fcfcf8f27b612e48cd94db9d07c3afaec8ca1a52461f9510c71890167c56a88
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48W:piAXaKDeKNnD36cb8tI8W
TLSH
T19BA39D42ABF087A1E0619CB506735B629E73FC2B193482677BD6B60EEC34F40EE25355
MD5 SHA1 SHA512 SSDEEP TLSH

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cccaglvh.dll

Path \??\c:\ptcit\cccaglvh.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/4232-9-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4232-8-0x0000000000870000-0x00000000008EC000-memory.dmp

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memory/4772-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4772-3-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4772-2-0x00000000009B0000-0x0000000000A2C000-memory.dmp

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memory/5020-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/5020-13-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/5020-14-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/5020-16-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/5020-15-0x0000000003010000-0x000000000308C000-memory.dmp

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