farfli | 2b79db592f56ee2527f63755ddf55ee4bd83700002e0d83f096331bd54618c6c

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
16/04/2026, 08:24

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General

Target
2026-04-16_0102af8259680e1d7f560ab432eee0d9_elex_wannacry.exe
Size 97KB
Sample260416-kapp3sa13m
SHA256 2b79db592f56ee2527f63755ddf55ee4bd83700002e0d83f096331bd54618c6c
MD5 0102af8259680e1d7f560ab432eee0d9
SHA1 14f1c21c857dab2520cfffa31569e4ed42d167df
SHA512 7572185ff9425c168a7be74c2a550d6a37c0ba7d9b268336d798821168935798f7c2dfa63426e26a43ef76db2717a84c3468a0008b80097249b00e30fb4c7b83
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo6:el69Ml0TE
TLSH
T151A3AE035BB588C9E5216C34562E7730C7BEA85D3B1457639388EE4EE837D85EC3628A
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
behavioral1/memory/4340-12-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/4340-13-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/4340-14-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/4340-16-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/4340-12-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4340-14-0x0000000010000000-0x0000000010032000-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
13	4340	rundll32.exe
14	4340	rundll32.exe
15	4340	rundll32.exe
16	4340	rundll32.exe
26	4340	rundll32.exe
42	4340	rundll32.exe
53	4340	rundll32.exe
57	4340	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x0007000000024380-10.dat	acprotect

Deletes itself 1 IoCs

pid	Process
700	hxpelmyxf.exe

Executes dropped EXE 1 IoCs

pid	Process
700	hxpelmyxf.exe

Loads dropped DLL 1 IoCs

pid	Process
4340	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-1-5-21-1609746302-1884177235-1125644204-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\mduovwy\\vpsdnw.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)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	hxpelmyxf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-16_0102af8259680e1d7f560ab432eee0d9_elex_wannacry.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
4624	cmd.exe
4372	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
4372	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4340	rundll32.exe
4340	rundll32.exe
4340	rundll32.exe
4340	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4340	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4496	2026-04-16_0102af8259680e1d7f560ab432eee0d9_elex_wannacry.exe
700	hxpelmyxf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4496 wrote to memory of 4624	4496	2026-04-16_0102af8259680e1d7f560ab432eee0d9_elex_wannacry.exe	85
PID 4624 wrote to memory of 4372	4624	cmd.exe	87
PID 4624 wrote to memory of 700	4624	cmd.exe	88
PID 700 wrote to memory of 4340	700	hxpelmyxf.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-04-16_0102af8259680e1d7f560ab432eee0d9_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_0102af8259680e1d7f560ab432eee0d9_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4496
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\hxpelmyxf.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-16_0102af8259680e1d7f560ab432eee0d9_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4624
- - 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:4372
- - \??\c:\hxpelmyxf.exe
    c:\hxpelmyxf.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-16_0102af8259680e1d7f560ab432eee0d9_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:700
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\mduovwy\vpsdnw.dll",DoVirusScan c:\hxpelmyxf.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:4340

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

hxpelmyxf.exe

Path C:\hxpelmyxf.exe
Size 97KB
SHA256 cfe100114c7fd58bcda0b0623e54c901f3968984d95ff54b3f90cf89291de821
MD5 2ad8407d94cf6004c728d5965989bf78
SHA1 447adfb95987613851ca9a7e2aa80ea292fed7d0
SHA512 ca5fa4607f03a5d7ea4baad005d6c700a2b2e359ea146595ece16ce827c195d152890a832bc0aa60246cd3de2df5a2a4599bbf9d949d4961eadbc06a9b51b3cf
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo6e:el69Ml0TEd
TLSH
T1A6A3AE035BB588C9E5216C34562E773087BEE85D3B1457639388EE4EE837D85EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

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vpsdnw.dll

Path \??\c:\mduovwy\vpsdnw.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

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memory/700-9-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/700-8-0x0000000000A00000-0x0000000000B20000-memory.dmp

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memory/4340-12-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/4340-13-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/4340-14-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/4340-16-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/4340-15-0x0000000000690000-0x00000000007B0000-memory.dmp

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memory/4340-19-0x0000000000690000-0x00000000007B0000-memory.dmp

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memory/4340-30-0x0000000000690000-0x00000000007B0000-memory.dmp

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memory/4496-2-0x00000000009D0000-0x0000000000AF0000-memory.dmp

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memory/4496-3-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4496-0-0x0000000000400000-0x0000000000417000-memory.dmp

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