farfli | 98a0c008988534d96f8000423b56336ca3cc4848414753004491b278ee4b25ef

Analysis

max time kernel
149s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
04/11/2026, 02:27

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General

Target
98a0c008988534d96f8000423b56336ca3cc4848414753004491b278ee4b25ef.exe
Size 112KB
Sample261104-cxtcsaex8t
SHA256 98a0c008988534d96f8000423b56336ca3cc4848414753004491b278ee4b25ef
MD5 cb3d75696a29208b09bd748e6d2fc3dc
SHA1 870a5de72e19f82531fd3e243e03953b602fbbb5
SHA512 0ebb3b8053491c5c156337397cd830b81a00361f459e7cae42692a0c482c2c1352fdce18e0611f8074f28e4db4bc507d19dfe87afad89bea22c9afe67500d5e3
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4c:piAXaKDeKNnD36cb8tIc
TLSH
T16AB3AD12ABF0C7A5E0625CB5067757619EB2FC2A2924872777D6B70EEC30F04EE21365
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 4 IoCs

resource	yara_rule
behavioral1/memory/3488-10-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/3488-11-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral1/memory/3488-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/3488-13-0x0000000010001000-0x000000001001E000-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
6	3488	rundll32.exe
7	3488	rundll32.exe
8	3488	rundll32.exe
18	3488	rundll32.exe
31	3488	rundll32.exe
34	3488	rundll32.exe
40	3488	rundll32.exe
41	3488	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4100	cywag.exe

Executes dropped EXE 1 IoCs

pid	Process
4100	cywag.exe

Loads dropped DLL 1 IoCs

pid	Process
3488	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-1-5-21-2101206053-1414382737-268919432-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\fzpqs\\sxvlxxxv.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)	\??\m:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	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)	\??\n:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	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

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
3180	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 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\Domain	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	cywag.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	98a0c008988534d96f8000423b56336ca3cc4848414753004491b278ee4b25ef.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
3180	cmd.exe
1640	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
1640	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3488	rundll32.exe
3488	rundll32.exe
3488	rundll32.exe
3488	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3488	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5052	98a0c008988534d96f8000423b56336ca3cc4848414753004491b278ee4b25ef.exe
4100	cywag.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5052 wrote to memory of 3180	5052	98a0c008988534d96f8000423b56336ca3cc4848414753004491b278ee4b25ef.exe	84
PID 3180 wrote to memory of 1640	3180	cmd.exe	86
PID 3180 wrote to memory of 4100	3180	cmd.exe	87
PID 4100 wrote to memory of 3488	4100	cywag.exe	88

C:\Users\Admin\AppData\Local\Temp\98a0c008988534d96f8000423b56336ca3cc4848414753004491b278ee4b25ef.exe
"C:\Users\Admin\AppData\Local\Temp\98a0c008988534d96f8000423b56336ca3cc4848414753004491b278ee4b25ef.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5052
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\cywag.exe "C:\Users\Admin\AppData\Local\Temp\98a0c008988534d96f8000423b56336ca3cc4848414753004491b278ee4b25ef.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:3180
- - 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:1640
- - \??\c:\cywag.exe
    c:\cywag.exe "C:\Users\Admin\AppData\Local\Temp\98a0c008988534d96f8000423b56336ca3cc4848414753004491b278ee4b25ef.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4100
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\fzpqs\sxvlxxxv.dll",GetWindowClass c:\cywag.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
      PID:3488

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

cywag.exe

Path C:\cywag.exe
Size 112KB
SHA256 8ef3e5da317410e7a5c084014908f36ff20cb5e7e74a36598746cf854507c0af
MD5 d6935945aeed9fa609a257d3480a7b43
SHA1 276c77712054e37ff0ef6d3b3c15cdd1cd8dce9e
SHA512 f42553dd3a3224fdc81e8ac30024105456f467fcbdf8631a4aa718fefc2fef2c9ae283479896bfc1b9c259d6516046a4e10265a3ea8b68d8cdeb83c0ef5917ee
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4n:piAXaKDeKNnD36cb8tIn
TLSH
T15EB3AE12ABF0C7A5E0625CB5067757619EB2FC2A2924872777D6B70EEC30F04EE25364
MD5 SHA1 SHA512 SSDEEP TLSH

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sxvlxxxv.dll

Path \??\c:\fzpqs\sxvlxxxv.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

Submit Download

memory/3488-10-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/3488-11-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/3488-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/3488-13-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4100-7-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/5052-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/5052-2-0x0000000000400000-0x000000000041A000-memory.dmp

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