farfli | 39539d62fe1a613f2ac1211ebdb43aa99262d009473b1af2064a89342dfec40d

Analysis

max time kernel
150s
max time network
147s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
01/08/2026, 12:16

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General

Target
39539d62fe1a613f2ac1211ebdb43aa99262d009473b1af2064a89342dfec40d.exe
Size 646KB
Sample260801-pfgc4svbmd
SHA256 39539d62fe1a613f2ac1211ebdb43aa99262d009473b1af2064a89342dfec40d
MD5 c20d325d4fa3b9975e1caa14e03bdb52
SHA1 ee5dec7286c5958cce3af2353490efea5d7daa41
SHA512 f7cc7b99b2798030b8a2b0f915a73e5aa9c8a99a438956d6b3e6a32b7a9db4654a1cf7069412f1680d439d591abc569625260906671851387b47fd5e2d00df19
SSDEEP 6144:PQJf3uMxrbLgEN6S7KzA5x3S5+y3D82oC0UdkgxgfOqw/:4J130ENL7kArI+y3XipfOf
TLSH
T1A1E422F11A64D42FE09841B2E78DE83266E0DCC279A50B3297E47B1DB3C940BF939635
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 2 IoCs

resource	yara_rule
behavioral2/memory/1576-17-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli
behavioral2/memory/1576-21-0x0000000010000000-0x0000000010054000-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	1576	rundll32.exe
8	1576	rundll32.exe
9	1576	rundll32.exe
10	1576	rundll32.exe
11	1576	rundll32.exe
13	1576	rundll32.exe
14	1576	rundll32.exe
16	1576	rundll32.exe
17	1576	rundll32.exe
19	1576	rundll32.exe
20	1576	rundll32.exe
21	1576	rundll32.exe
22	1576	rundll32.exe
23	1576	rundll32.exe
24	1576	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3336	xwyqqarv.exe

Executes dropped EXE 3 IoCs

pid	Process
3336	xwyqqarv.exe
5144	wiseman.exe
3516	wiseman.exe

Loads dropped DLL 1 IoCs

pid	Process
1576	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 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3611646547-550105268-947503007-1000\Software\Microsoft\Windows\CurrentVersion\Run\Wiseman = "C:\\wiseman.exe"	wiseman.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3611646547-550105268-947503007-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\zqvsx\\mhtcyfqbw.hcm\",RAFlush"	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)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	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)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	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

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4848	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	39539d62fe1a613f2ac1211ebdb43aa99262d009473b1af2064a89342dfec40d.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	xwyqqarv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wiseman.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wiseman.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
4848	cmd.exe
3420	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3420	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe
1576	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1576	rundll32.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
5952	39539d62fe1a613f2ac1211ebdb43aa99262d009473b1af2064a89342dfec40d.exe
3336	xwyqqarv.exe
5144	wiseman.exe
3516	wiseman.exe
5144	wiseman.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5952 wrote to memory of 4848	5952	39539d62fe1a613f2ac1211ebdb43aa99262d009473b1af2064a89342dfec40d.exe	89
PID 4848 wrote to memory of 3420	4848	cmd.exe	91
PID 4848 wrote to memory of 3336	4848	cmd.exe	92
PID 3336 wrote to memory of 1576	3336	xwyqqarv.exe	93
PID 1576 wrote to memory of 5144	1576	rundll32.exe	94

C:\Users\Admin\AppData\Local\Temp\39539d62fe1a613f2ac1211ebdb43aa99262d009473b1af2064a89342dfec40d.exe
"C:\Users\Admin\AppData\Local\Temp\39539d62fe1a613f2ac1211ebdb43aa99262d009473b1af2064a89342dfec40d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5952
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\xwyqqarv.exe "C:\Users\Admin\AppData\Local\Temp\39539d62fe1a613f2ac1211ebdb43aa99262d009473b1af2064a89342dfec40d.exe"
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4848
- - 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:3420
- - C:\Users\Admin\AppData\Local\Temp\xwyqqarv.exe
    C:\Users\Admin\AppData\Local\Temp\\xwyqqarv.exe "C:\Users\Admin\AppData\Local\Temp\39539d62fe1a613f2ac1211ebdb43aa99262d009473b1af2064a89342dfec40d.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3336
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\zqvsx\mhtcyfqbw.hcm",RAFlush C:\Users\Admin\AppData\Local\Temp\xwyqqarv.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
      Suspicious use of WriteProcessMemory
      PID:1576
    - - C:\wiseman.exe
        
        "C:\wiseman.exe"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:5144

C:\wiseman.exe
C:\wiseman.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:3516

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

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

xwyqqarv.exe

Path C:\Users\Admin\AppData\Local\Temp\xwyqqarv.exe
Size 646KB
SHA256 12fd663bc58ba69b57f82faf190170dd9e3424d7e49d33feb7d14f6b767b6c93
MD5 11c0fa4929c1f764ff4f3b7e7e487296
SHA1 6b0a6e869e519e4896f82992817e60e190e5cf08
SHA512 5ab7e21cbc2a909550d335641cf433b55dd0c19f70c05aff20084690376c3bb4535640ca3a3a9e27a37e3e6a72337c9a11e8ac79942c4b5d8a92b56da76be81a
SSDEEP 6144:PQJf3uMxrbLgEN6S7KzA5x3S5+y3D82oC0UdkgxgfOqwH:4J130ENL7kArI+y3XipfOn
TLSH
T1B0E422F11964D42FE09841B6E78DE83266E0DCC279A50B3297E47B1DB3C940BF939635
MD5 SHA1 SHA512 SSDEEP TLSH

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wiseman.exe

Path C:\wiseman.exe
Size 378KB
SHA256 03505198d487e04a8ec82c627d34e4d9145f211140c4c8793b4461621e6bf6ce
MD5 8f242369cf14f2b26ced131d7dd67144
SHA1 d4f2f0f3047300ff5f36af6119ad5e109258fcd0
SHA512 4516b3fa2f68e64baf166bc7731ba3bb0ca53d36d71ff8fa78b1f211d7c14fc4442af50bd637d0c3f11913583c9c66996101d6e8738592a053e82a78bbd771f5
SSDEEP 6144:yraxNx1Gc9N6xJ/MO2N89M4qjGggUA0CthK1KLAb+AfQQIh+K+TuAubWq49OU/CU:ygVhNrAM1qgg2l
TLSH
T14B844C2152C61426E16B8232B4F7E3FAB53F940A56126BEBBB9CFE34C54E4533532349
MD5 SHA1 SHA512 SSDEEP TLSH

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mhtcyfqbw.hcm

Path \??\c:\zqvsx\mhtcyfqbw.hcm
Size 155KB
SHA256 ec6ef50587a847d4a655e9bfc5c1aee4078005c0774a3e6fa23949cc4d8fbad3
MD5 20e7a8b973ac2b43c95ddb77308266c9
SHA1 e46e6ea272ae628d15bfb7b71ff40e3950fd2e85
SHA512 60b585b2de46ac412577eb590916d282bf3f25ba1196362a97c12620c3b6eb94a78e3faac182305002790bb9c3705a346e54508b644d3e9329201fcb4bad0fd6
SSDEEP 3072:YuTByM2ViNpg032aUgrhoiFmyt8KDZS1:ZByMnN+3d1
TLSH
T10FF36D1163FD4618F5F7BF356EB54A605E3ABC62AE38CB0C1650504E59B1F60DAB0B23
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1576-12-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/1576-17-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/1576-21-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/3336-9-0x0000000000400000-0x000000000049E01B-memory.dmp

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memory/5952-0-0x0000000000400000-0x000000000049E01B-memory.dmp

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memory/5952-3-0x0000000000400000-0x000000000049E01B-memory.dmp

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