farfli | 22693711e439ade28d8fab404dc32932c0867631ddf4afeab08dc205e1e6ef8a

Analysis

max time kernel
150s
max time network
149s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
17/07/2026, 07:56

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General

Target
2026-07-17_713c9d613cc0696ba8925b80ad020297_elex_wannacry.exe
Size 86KB
Sample260717-js422sat6x
SHA256 22693711e439ade28d8fab404dc32932c0867631ddf4afeab08dc205e1e6ef8a
MD5 713c9d613cc0696ba8925b80ad020297
SHA1 7ad7155034cf968161d041e4c4b4637c9a8256ae
SHA512 b3dc6e937df750731ad3114d5d45db4e9b60d20c442f36e0246aecd8d50353977a1aac7aa26297b5c5833eaafb3fcf55c8b6fe6aad483313730b8062c91f7469
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSd:a14ZaKOTZSMcJVgDKxAH9MhtfSd
TLSH
T11183CF232FBB0135DD449F711E6B2669E6F2BD36212082B28B5CDD8DA93CE45DB0171C
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery 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/4260-11-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/4260-13-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/4260-14-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4260-11-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4260-13-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4260-14-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
1	4260	rundll32.exe
2	4260	rundll32.exe
3	4260	rundll32.exe
4	4260	rundll32.exe
5	4260	rundll32.exe
6	4260	rundll32.exe
7	4260	rundll32.exe
8	4260	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4428	hkoheoz.exe

Executes dropped EXE 1 IoCs

pid	Process
4428	hkoheoz.exe

Loads dropped DLL 1 IoCs

pid	Process
4260	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-1-5-21-2115213192-531537726-3295841909-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\tmjvhyg\\zisdu.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)	\??\j:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\y:	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)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	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

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	2026-07-17_713c9d613cc0696ba8925b80ad020297_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	hkoheoz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
3968	cmd.exe
4136	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
4136	PING.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4260	rundll32.exe
4260	rundll32.exe
4260	rundll32.exe
4260	rundll32.exe
4260	rundll32.exe
4260	rundll32.exe
4260	rundll32.exe
4260	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4260	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4564	2026-07-17_713c9d613cc0696ba8925b80ad020297_elex_wannacry.exe
4428	hkoheoz.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4564 wrote to memory of 3968	4564	2026-07-17_713c9d613cc0696ba8925b80ad020297_elex_wannacry.exe	89
PID 3968 wrote to memory of 4136	3968	cmd.exe	91
PID 3968 wrote to memory of 4428	3968	cmd.exe	92
PID 4428 wrote to memory of 4260	4428	hkoheoz.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-17_713c9d613cc0696ba8925b80ad020297_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-17_713c9d613cc0696ba8925b80ad020297_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4564
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\hkoheoz.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-17_713c9d613cc0696ba8925b80ad020297_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3968
- - 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:4136
- - \??\c:\hkoheoz.exe
    c:\hkoheoz.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-17_713c9d613cc0696ba8925b80ad020297_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4428
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\tmjvhyg\zisdu.dll",GetWindowClass c:\hkoheoz.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:4260

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

hkoheoz.exe

Path \??\c:\hkoheoz.exe
Size 86KB
SHA256 7cf434e6bb19f505c3c97e89c1969d7d034d0c43a0716df2fa903b47e48fd5a0
MD5 67f9a800c8a0a41da62c44b33f3b8a21
SHA1 e3452cc9e41f4c753b949f270e2919dc4d22cf73
SHA512 1b8ea083dc107b8c228512a15d51cf2010e637469e7f7750b5bd7cd7ba036bcbfb42cddd0c25b0332ad6d73b22b55301f34b8488afd28da569b90ab12073fec1
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSd9:a14ZaKOTZSMcJVgDKxAH9MhtfSd9
TLSH
T15293CF232FBB4175DD44AF711E6B2669E6F2BD36212082B28B5C9D8DA93CF44DB0171C
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

zisdu.dll

Path \??\c:\tmjvhyg\zisdu.dll
Size 43KB
SHA256 0b747c32730f2ad29b44299054bc22f8075702b081e91edaaead528abca227d2
MD5 0164aeb78f4d2181e817a9a6b0ad22f1
SHA1 c56c6a743e48e8652707a34e4cddc1f645f140ea
SHA512 e69ad90790d8062a903954f7ea85cacd241113afaf0eb16098f473835cffcda6e1f9fa9844a8618cc297fffa2e6ff7d458f9ebb2ce3febf7ffd683ffd6ad44f5
SSDEEP 768:2DdBa8mqIOiSUZrBGhvQLq6UYiaKRsRMwwY2BjkTrXW/VJZ581swUqHhiQREQoJs:kwqnPUb+v0q6UY+sRMwwY2Jkal+1ZUqJ
TLSH
T19613F133EACCDFDFF8A05271C576D0FCD337AC2849669A0395A0219D9D60948B878F66
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4260-9-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/4260-10-0x0000000001440000-0x0000000001442000-memory.dmp

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memory/4260-11-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/4260-13-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/4260-14-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/4428-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4564-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4564-2-0x0000000000400000-0x0000000000417000-memory.dmp

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