farfli | 72d2a072d489c56c869b2b5df71aa0ac5109efc5c66873503cb22b65686ea7b0

Analysis

max time kernel
150s
max time network
145s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
23/04/2026, 03:59

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-04-23_8e111142eb031505bab26fc0522ee3ef_elex_wannacry.exe
Size 98KB
Sample260423-ej9hysat4v
SHA256 72d2a072d489c56c869b2b5df71aa0ac5109efc5c66873503cb22b65686ea7b0
MD5 8e111142eb031505bab26fc0522ee3ef
SHA1 5b0be3c41735f2fb3fb79ac652b5894ec4211bde
SHA512 212b2063511b475f7a0734eee88454e704bddde5f225882f8686335ca0abee36af4c39325aefa9ce3329b3cf65dde829d197ed9e84e3b95d22812a3cf84983d6
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo600:el69Ml0TEw
TLSH
T151A3BE135BB484CAE4216C74562E773087FEA81D3F1457639388EE4EE833D85EC3629A
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 4 IoCs

resource	yara_rule
behavioral2/memory/2116-11-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/2116-10-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/2116-12-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/2116-13-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/2116-10-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2116-12-0x0000000010000000-0x0000000010032000-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
2	2116	rundll32.exe
4	2116	rundll32.exe
3	2116	rundll32.exe
5	2116	rundll32.exe
6	2116	rundll32.exe
7	2116	rundll32.exe
9	2116	rundll32.exe
11	2116	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x001b00000002b26a-8.dat	acprotect

Deletes itself 1 IoCs

pid	Process
4264	hkcthir.exe

Executes dropped EXE 1 IoCs

pid	Process
4264	hkcthir.exe

Loads dropped DLL 1 IoCs

pid	Process
2116	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-1-5-21-3847269522-1618051987-1942096715-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\tnzxepo\\hwcis.dll\",DoVirusScan"	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)	\??\l:	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)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	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	2026-04-23_8e111142eb031505bab26fc0522ee3ef_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	hkcthir.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
3356	cmd.exe
3248	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
3248	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2116	rundll32.exe
2116	rundll32.exe
2116	rundll32.exe
2116	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2116	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4560	2026-04-23_8e111142eb031505bab26fc0522ee3ef_elex_wannacry.exe
4264	hkcthir.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4560 wrote to memory of 3356	4560	2026-04-23_8e111142eb031505bab26fc0522ee3ef_elex_wannacry.exe	80
PID 3356 wrote to memory of 3248	3356	cmd.exe	82
PID 3356 wrote to memory of 4264	3356	cmd.exe	83
PID 4264 wrote to memory of 2116	4264	hkcthir.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-04-23_8e111142eb031505bab26fc0522ee3ef_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-23_8e111142eb031505bab26fc0522ee3ef_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4560
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\hkcthir.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-23_8e111142eb031505bab26fc0522ee3ef_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3356
- - 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:3248
- - \??\c:\hkcthir.exe
    c:\hkcthir.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-23_8e111142eb031505bab26fc0522ee3ef_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4264
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\tnzxepo\hwcis.dll",DoVirusScan c:\hkcthir.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:2116

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

Replay Monitor

Loading Replay Monitor...

Downloads

hkcthir.exe

Path C:\hkcthir.exe
Size 98KB
SHA256 a8cff6099f4c726b006e6d2d5f3f027e8acb9e678fc77a6e529341b3111a0ad1
MD5 a66e2d90e8db85c79035e1729a55be5a
SHA1 f3f3df182afdc82bb49d56f47dd6fd0646b37bf6
SHA512 140c0295515a7f320d767a0c0c9ac5bd4d7400665b3a9e0a6438b183c2e1b2302203dddd81c70f909a7413479ae0bc4a4c2e4fa59bcd5557051be6f80117c987
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo60q:el69Ml0TEW
TLSH
T1A9A3AE135BB485CAF4216C74562E773087FEA81D3B1457639388EE4EE833D85EC3629A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

hwcis.dll

Path \??\c:\tnzxepo\hwcis.dll
Size 50KB
SHA256 b2d21c40c5bfc0f7695945946fa1cdd4eaf2f66a8391ddde6307c5f765fbf525
MD5 cbfc06794d16ace6adf42210183fc1b9
SHA1 74fc68a2af225b0aca954b3684940747511013c5
SHA512 181dbe8b63e28a81cb8e0b7240df8745da350e1ab433b157b8b4fd36aa10f0782e807c09563bcffe37cfe64aa1b514b2cc1f179fbcba422d96867179d88e13c9
SSDEEP 768:Z+arYIR3u5v4bGwCl56LNQQe5JBtGf1oTYtx/qQvorLOpqPJ/UP2Gy+OIudD05:ZPrG57TzDxJS6Etx/Zv2OwSy+OIOD05
TLSH
T15733F1ACE2F064F5D0AF6B345952225CF5C26F238D3190DB4A8214BF3C32A5B5B5E721
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2116-11-0x0000000010001000-0x0000000010021000-memory.dmp

Download

memory/2116-10-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/2116-12-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/2116-13-0x0000000010001000-0x0000000010021000-memory.dmp

Download

memory/4264-7-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/4560-0-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/4560-2-0x0000000000400000-0x0000000000417000-memory.dmp

Download