farfli | 5d9f6bb38da801c6b6d95ff07363875dce9012f24bb1bd6a7b51e0f8259eb73d

Analysis

max time kernel
150s
max time network
137s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
17/10/2026, 08:28

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General

Target
5d9f6bb38da801c6b6d95ff07363875dce9012f24bb1bd6a7b51e0f8259eb73d.exe
Size 651KB
Sample261017-kdhe6swt3n
SHA256 5d9f6bb38da801c6b6d95ff07363875dce9012f24bb1bd6a7b51e0f8259eb73d
MD5 f53f08e712701817668efdc86f3e1280
SHA1 2133a88850e960e0114d47ab4326adc723337568
SHA512 02c4734f2d5cf9ba9bac2e3b8185b2e85ce574c930f769bab3f11385bb29a0e21b44e670ae388f1b3cc7e98612d667d3d1fa7ff1625bb84780d0d038c0b32c88
SSDEEP 6144:PQJf3uMxrbLgEN6S7KzA5x3S5+y3D82oC0UdkgxgfOq:4J130ENL7kArI+y3XipfO
TLSH
T158E412F11A64D42FE09840B6E759E431A6E0DCC239A10F2293E5BB1DB3C950BF97A635
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion 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/2236-15-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli
behavioral2/memory/2236-17-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli
behavioral2/memory/2236-20-0x0000000010000000-0x0000000010054000-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	2236	rundll32.exe
3	2236	rundll32.exe
4	2236	rundll32.exe
5	2236	rundll32.exe
6	2236	rundll32.exe
8	2236	rundll32.exe
9	2236	rundll32.exe
10	2236	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3580	krgkg.exe

Executes dropped EXE 3 IoCs

pid	Process
3580	krgkg.exe
2756	wiseman.exe
4092	wiseman.exe

Loads dropped DLL 1 IoCs

pid	Process
2236	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-1-5-21-4057491610-3392471755-192832105-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\jvyojkf\\mkvrg.krm\",RAFlush"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4057491610-3392471755-192832105-1000\Software\Microsoft\Windows\CurrentVersion\Run\Wiseman = "C:\\wiseman.exe"	wiseman.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)	\??\s:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	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
6124	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	rundll32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	wiseman.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	wiseman.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	rundll32.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	5d9f6bb38da801c6b6d95ff07363875dce9012f24bb1bd6a7b51e0f8259eb73d.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	krgkg.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
6124	cmd.exe
2672	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
2672	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe
2236	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2236	rundll32.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
5112	5d9f6bb38da801c6b6d95ff07363875dce9012f24bb1bd6a7b51e0f8259eb73d.exe
3580	krgkg.exe
2756	wiseman.exe
4092	wiseman.exe
2756	wiseman.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5112 wrote to memory of 6124	5112	5d9f6bb38da801c6b6d95ff07363875dce9012f24bb1bd6a7b51e0f8259eb73d.exe	91
PID 6124 wrote to memory of 2672	6124	cmd.exe	93
PID 6124 wrote to memory of 3580	6124	cmd.exe	94
PID 3580 wrote to memory of 2236	3580	krgkg.exe	95
PID 2236 wrote to memory of 2756	2236	rundll32.exe	96

C:\Users\Admin\AppData\Local\Temp\5d9f6bb38da801c6b6d95ff07363875dce9012f24bb1bd6a7b51e0f8259eb73d.exe
"C:\Users\Admin\AppData\Local\Temp\5d9f6bb38da801c6b6d95ff07363875dce9012f24bb1bd6a7b51e0f8259eb73d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5112
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\krgkg.exe "C:\Users\Admin\AppData\Local\Temp\5d9f6bb38da801c6b6d95ff07363875dce9012f24bb1bd6a7b51e0f8259eb73d.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:6124
- - 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:2672
- - C:\Users\Admin\AppData\Local\Temp\krgkg.exe
    C:\Users\Admin\AppData\Local\Temp\\krgkg.exe "C:\Users\Admin\AppData\Local\Temp\5d9f6bb38da801c6b6d95ff07363875dce9012f24bb1bd6a7b51e0f8259eb73d.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3580
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\jvyojkf\mkvrg.krm",RAFlush C:\Users\Admin\AppData\Local\Temp\krgkg.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)
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2236
    - - C:\wiseman.exe
        
        "C:\wiseman.exe"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        Reads the TCP/IP host and domain name from the registry
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2756

C:\wiseman.exe
C:\wiseman.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:4092

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

Indicator Removal

T1070

File Deletion

T1070.004

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

krgkg.exe

Path C:\Users\Admin\AppData\Local\Temp\krgkg.exe
Size 651KB
SHA256 75d47ae3f737ccd4b58003209c344cd2e2200d2ba4aa143f2f14ac819c16d3d2
MD5 71885f72a926c0ebf90c0ed2c9ce5265
SHA1 426eb8105f3207a8e981a6dc0b14740f1643fea2
SHA512 f4d0ca67977a546cbafbeede1767acfac43e954e3d2ac7a59d777b68397e4073ae17d2e025c6b0aaa15085297bc9a2c045c47b8533b6c4b3588fee4843dc1718
SSDEEP 6144:PQJf3uMxrbLgEN6S7KzA5x3S5+y3D82oC0UdkgxgfOqQ:4J130ENL7kArI+y3XipfOd
TLSH
T117E412F11A64D42FE09840B6E75DE431A6E0DCC239A10B2293E5BB1DB3C950FF97A635
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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mkvrg.krm

Path \??\c:\jvyojkf\mkvrg.krm
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/2236-11-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/2236-15-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/2236-17-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/2236-20-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/3580-8-0x0000000000400000-0x000000000049E01B-memory.dmp

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memory/5112-0-0x0000000000400000-0x000000000049E01B-memory.dmp

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memory/5112-2-0x0000000000400000-0x000000000049E01B-memory.dmp

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