farfli | 20fbeb1934ac1a999f13271169fe580bf58b6cc9498ebae6efd7c3d892ebe45d

Analysis

max time kernel
149s
max time network
146s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
15/08/2026, 12:39

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General

Target
20fbeb1934ac1a999f13271169fe580bf58b6cc9498ebae6efd7c3d892ebe45d.exe
Size 291KB
Sample260815-pv43qabr21
SHA256 20fbeb1934ac1a999f13271169fe580bf58b6cc9498ebae6efd7c3d892ebe45d
MD5 3b90a50348f4e135ad9b05ea7fe52cc0
SHA1 8adfd1838bb3bc81377cd5db2ac6449b79aa4a97
SHA512 5ff582e75cf12e60f0bf7c132ce2d0e53e217fc8c68e415f60c2fdf7aea16395a66be093390935b64d02ec4cd38078ce518ed855fa0741003a3149f959b3152f
SSDEEP 6144:gQJf3uMxrbLgEN6S7KzA5x3S5+y3D82oC0UdkgxgfOqsG7Hq:nJ130ENL7kArI+y3XipfOK7K
TLSH
T1015412A05A74D42FE0A505B2D35DA63266F0DC857D660B2793E0BB0EB2C490FF975336
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 3 IoCs

resource	yara_rule
behavioral2/memory/944-12-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli
behavioral2/memory/944-17-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli
behavioral2/memory/944-22-0x0000000010000000-0x0000000010054000-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	944	rundll32.exe
8	944	rundll32.exe
9	944	rundll32.exe
10	944	rundll32.exe
11	944	rundll32.exe
13	944	rundll32.exe
14	944	rundll32.exe
16	944	rundll32.exe
17	944	rundll32.exe
19	944	rundll32.exe
20	944	rundll32.exe
21	944	rundll32.exe
22	944	rundll32.exe
23	944	rundll32.exe
24	944	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2624	oylmkzq.exe

Executes dropped EXE 3 IoCs

pid	Process
2624	oylmkzq.exe
4748	wiseman.exe
2100	wiseman.exe

Loads dropped DLL 1 IoCs

pid	Process
944	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-1-5-21-2301830172-776172150-2531349243-1000\Software\Microsoft\Windows\CurrentVersion\Run\Wiseman = "C:\\wiseman.exe"	wiseman.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2301830172-776172150-2531349243-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\vigka\\lykpu.ypl\",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)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	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)	\??\l:	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)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	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)	\??\n:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	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
5112	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	oylmkzq.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	20fbeb1934ac1a999f13271169fe580bf58b6cc9498ebae6efd7c3d892ebe45d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
4728	PING.EXE
5112	cmd.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
4728	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe
944	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	944	rundll32.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
988	20fbeb1934ac1a999f13271169fe580bf58b6cc9498ebae6efd7c3d892ebe45d.exe
2624	oylmkzq.exe
4748	wiseman.exe
2100	wiseman.exe
4748	wiseman.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 988 wrote to memory of 5112	988	20fbeb1934ac1a999f13271169fe580bf58b6cc9498ebae6efd7c3d892ebe45d.exe	89
PID 5112 wrote to memory of 4728	5112	cmd.exe	91
PID 5112 wrote to memory of 2624	5112	cmd.exe	92
PID 2624 wrote to memory of 944	2624	oylmkzq.exe	93
PID 944 wrote to memory of 4748	944	rundll32.exe	94

C:\Users\Admin\AppData\Local\Temp\20fbeb1934ac1a999f13271169fe580bf58b6cc9498ebae6efd7c3d892ebe45d.exe
"C:\Users\Admin\AppData\Local\Temp\20fbeb1934ac1a999f13271169fe580bf58b6cc9498ebae6efd7c3d892ebe45d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:988
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\oylmkzq.exe "C:\Users\Admin\AppData\Local\Temp\20fbeb1934ac1a999f13271169fe580bf58b6cc9498ebae6efd7c3d892ebe45d.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:5112
- - 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:4728
- - C:\Users\Admin\AppData\Local\Temp\oylmkzq.exe
    C:\Users\Admin\AppData\Local\Temp\\oylmkzq.exe "C:\Users\Admin\AppData\Local\Temp\20fbeb1934ac1a999f13271169fe580bf58b6cc9498ebae6efd7c3d892ebe45d.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2624
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\vigka\lykpu.ypl",RAFlush C:\Users\Admin\AppData\Local\Temp\oylmkzq.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:944
    - - 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:4748

C:\wiseman.exe
C:\wiseman.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:2100

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

oylmkzq.exe

Path C:\Users\Admin\AppData\Local\Temp\oylmkzq.exe
Size 291KB
SHA256 c439dbfbfe683e83032e2d4ea166478b4569e9c689bb5cad9420256cfeed49e4
MD5 3e5d107139753791592813fc2dd95d64
SHA1 e63a775b958b4b176f615ce7d2444a1462ff83c9
SHA512 a05a5eb6d29dcd653e9ed2f9e414d7d9092764a3247cbef0a4ef114d35dc8ef21560363c5e11ac40a3b66aae7045c7e4eed625e1228728f03a37e5d2147c471c
SSDEEP 6144:gQJf3uMxrbLgEN6S7KzA5x3S5+y3D82oC0UdkgxgfOqsG7HB:nJ130ENL7kArI+y3XipfOK7h
TLSH
T1EA5412A05A74D42FE0A504B2D35DA63266F0DC857D660B2793E4BB0EB2C490FF979336
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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lykpu.ypl

Path \??\c:\vigka\lykpu.ypl
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/944-12-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/944-17-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/944-22-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/988-0-0x0000000000400000-0x000000000049E01B-memory.dmp

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memory/988-3-0x0000000000400000-0x000000000049E01B-memory.dmp

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memory/2624-9-0x0000000000400000-0x000000000049E01B-memory.dmp

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