farfli | f92a76fc9effa718ea57b75be965b902b66a7d59073a4453c89b73d8ad1a3c23

Analysis

max time kernel
148s
max time network
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/09/2026, 16:25

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General

Target
2026-09-10_5e2105abdf3719437261403b5928f6bb_elex_wannacry.exe
Size 99KB
Sample260910-tw86aavtdt
SHA256 f92a76fc9effa718ea57b75be965b902b66a7d59073a4453c89b73d8ad1a3c23
MD5 5e2105abdf3719437261403b5928f6bb
SHA1 9a7d16303fd2b188eef1a16d73db29c8a8a6ba46
SHA512 e01c28f797d4276101a51b64ffa81973ea433c0d9fd215151a5556beb78a21fbdb56a2699b023064ee832cc15882db7f5d2d3f44d412a44a78f531489f24917c
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmy:ELRrO10TiJD9yjqrilyxOWP
TLSH
T104A3BE5D7D82889FD4008B7147539726A6B26C69FA314F374340BA6DBF36807EED928C
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/3704-11-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/3704-14-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/3704-11-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3704-14-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 3 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
8	3704	rundll32.exe
9	3704	rundll32.exe
11	3704	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3520	etsbe.exe

Executes dropped EXE 1 IoCs

pid	Process
3520	etsbe.exe

Loads dropped DLL 1 IoCs

pid	Process
3704	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-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\edwot\\borhy.dll\",QueryPluginInterface"	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)	\??\k:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	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)	\??\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

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
5700	cmd.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	etsbe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-09-10_5e2105abdf3719437261403b5928f6bb_elex_wannacry.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
5700	cmd.exe
4676	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
4676	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3704	rundll32.exe
3704	rundll32.exe
3704	rundll32.exe
3704	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3704	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
8	2026-09-10_5e2105abdf3719437261403b5928f6bb_elex_wannacry.exe
3520	etsbe.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 8 wrote to memory of 5700	8	2026-09-10_5e2105abdf3719437261403b5928f6bb_elex_wannacry.exe	89
PID 5700 wrote to memory of 4676	5700	cmd.exe	91
PID 5700 wrote to memory of 3520	5700	cmd.exe	92
PID 3520 wrote to memory of 3704	3520	etsbe.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-09-10_5e2105abdf3719437261403b5928f6bb_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-10_5e2105abdf3719437261403b5928f6bb_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:8
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\etsbe.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-10_5e2105abdf3719437261403b5928f6bb_elex_wannacry.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:5700
- - 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:4676
- - C:\Users\Admin\AppData\Local\Temp\etsbe.exe
    C:\Users\Admin\AppData\Local\Temp\\etsbe.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-10_5e2105abdf3719437261403b5928f6bb_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3520
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\edwot\borhy.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\etsbe.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:3704

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

etsbe.exe

Path C:\Users\Admin\AppData\Local\Temp\etsbe.exe
Size 100KB
SHA256 a3e8104a5b296d7ad555b8824b0a92e0b0be4a9c1558b1e9965925579d442cac
MD5 1125c8f7acc717946183747020366979
SHA1 72966ead994e128be7e8960952812f9f2aaa3d29
SHA512 806b9551095444a19472c31b00698c05132ae027536292cc9b39211acd7ea888bf10ccc86dd7b2e7bcd5fdd7782157d421a3e76b06c113e8aebfd25dd3d9e675
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmy9:ELRrO10TiJD9yjqrilyxOWP9
TLSH
T1F7A3BE5C7D92899FD4018B7047579726A6B26C19FA304F374340BA6EBF36807EED9288
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

borhy.dll

Path \??\c:\edwot\borhy.dll
Size 44KB
SHA256 9111c1eb1f0b59dcd49cfd5a0abc0ba100ac59a3bcae8623ff091dfdc46fed3c
MD5 0f12a7d509b2c9bb9b4cd6d8a0325e86
SHA1 f5fb59ad4f0633d115b06f35a2dc161dc4367157
SHA512 e3c84a643ff0a2627daba8a056221985a472aaf07bade61b3e9459db4bfc8792c1347606911e3fcc01581508004b18b5435bcccd5e7617cc6d091f37a5f42e7f
SSDEEP 768:DICzePjle2367kjhrXLdCuYMW8QVnwrLDGe/brbtJyOTuXfADVjeJ2i/MVJWAE:DDePjA23Ukjh37YMonwrvGybrbbRCf4E
TLSH
T1FD23F1A7B94E8D4FC0AE41F7078FC8D422B5589A97A7CB4626008F216CC4FB07E52376
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/8-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/8-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3520-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3704-9-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/3704-10-0x0000000000860000-0x0000000000862000-memory.dmp

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memory/3704-11-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/3704-14-0x0000000010000000-0x0000000010023000-memory.dmp

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