farfli | 8a16838631a8137baa0f141fac67ba162295f776edebf63ce92cae559b73bce9

Analysis

max time kernel
150s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
27/04/2026, 14:04

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General

Target
2026-04-27_a65e6caec8d524b58be59689830006a5_elex_wannacry.exe
Size 437KB
Sample260427-rdsdpsf13r
SHA256 8a16838631a8137baa0f141fac67ba162295f776edebf63ce92cae559b73bce9
MD5 a65e6caec8d524b58be59689830006a5
SHA1 4ed10023a9de2c77764bf381bd0455e8538a2a4c
SHA512 d53a2cbafe547b00eb2891e79959777f29313d88a2c34bc6e114b8f67b80261454ec5ee5ee9cb4121770fcc804a1ce81ce97a9b08eb1c75e8db0363ffc09bd36
SSDEEP 6144:BAzMDuL6wVQ+jex2envjZMqLNC95Cw8PEPHV0eXV:W5HjS2KlfLNo5CwKc1
TLSH
T1A094A25163F94608F6F77F7CAA792E7C4A76FC9EEC38C65C0252405F59B1A5088A0B23
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 2 IoCs

resource	yara_rule
behavioral1/memory/4496-12-0x0000000010000000-0x0000000010065000-memory.dmp	family_farfli
behavioral1/memory/4496-14-0x0000000010000000-0x0000000010065000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/4496-12-0x0000000010000000-0x0000000010065000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4496-14-0x0000000010000000-0x0000000010065000-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
5	4496	rundll32.exe
19	4496	rundll32.exe
20	4496	rundll32.exe
21	4496	rundll32.exe
34	4496	rundll32.exe
36	4496	rundll32.exe
41	4496	rundll32.exe
56	4496	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5356	sppzw.exe

Executes dropped EXE 1 IoCs

pid	Process
5356	sppzw.exe

Loads dropped DLL 1 IoCs

pid	Process
4496	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\Axpol = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\dmxsvf\\iofsn.dll\",ZipCompress"	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)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\r:	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\g:	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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4496	rundll32.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\dmxsvf	sppzw.exe
File created	\??\c:\Program Files\dmxsvf\iofsn.dll	sppzw.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	2026-04-27_a65e6caec8d524b58be59689830006a5_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	sppzw.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
4136	cmd.exe
5284	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
5284	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe
4496	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4496	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4124	2026-04-27_a65e6caec8d524b58be59689830006a5_elex_wannacry.exe
5356	sppzw.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4124 wrote to memory of 4136	4124	2026-04-27_a65e6caec8d524b58be59689830006a5_elex_wannacry.exe	84
PID 4136 wrote to memory of 5284	4136	cmd.exe	86
PID 4136 wrote to memory of 5356	4136	cmd.exe	87
PID 5356 wrote to memory of 4496	5356	sppzw.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-04-27_a65e6caec8d524b58be59689830006a5_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-27_a65e6caec8d524b58be59689830006a5_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4124
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\sppzw.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-27_a65e6caec8d524b58be59689830006a5_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4136
- - 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:5284
- - C:\Users\Admin\AppData\Local\Temp\sppzw.exe
    C:\Users\Admin\AppData\Local\Temp\\sppzw.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-27_a65e6caec8d524b58be59689830006a5_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5356
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\dmxsvf\iofsn.dll",ZipCompress C:\Users\Admin\AppData\Local\Temp\sppzw.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)
      Suspicious use of NtSetInformationThreadHideFromDebugger
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4496

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

sppzw.exe

Path C:\Users\Admin\AppData\Local\Temp\sppzw.exe
Size 437KB
SHA256 bb7fb3e28e2300f07f1c122ebe633d43d052b495d1a619484e018148addf70e6
MD5 35b4a8f7f2e96b8ec38b9ab900b71bbc
SHA1 535cdfc0f52c54ab95987d617b4e677015e0c2b7
SHA512 5599783075499b9e0e0393f18543523897ff2eeeae4a9887346d61fce5568ae74396e5f58efc42e8699843508c8df4b9d85fa651f116eeb24e1f8f19ec857ab2
SSDEEP 6144:BAzMDuL6wVQ+jex2envjZMqLNC95Cw8PEPHV0eXM:W5HjS2KlfLNo5CwKcs
TLSH
T1A794A25163F94608F6F77F7CAA792E7C4A76FC9EEC38C65C0252405F59B1A5088A0B23
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

iofsn.dll

Path \??\c:\Program Files\dmxsvf\iofsn.dll
Size 180KB
SHA256 81a563a56ed459440527075cb13e382f86309f3a9cc4d5ae2a5c6000f17354a1
MD5 4694b926043376098fa5198eeb8da81f
SHA1 5d4002f8fd2bf8780829bc3aabdcb35f8e2d434f
SHA512 a283e485fb4fcb11f70ff8375486579959e310525a7bbb391eb75bff4fc26da7c75dadf47fa4830e6882ad8e67d5639d8524487d122c079c791c2b679d89ce53
SSDEEP 3072:R/q9D8TGRg+2P0XSE0+7GHms91/Eg+lJKkarUTKeaVa/+UJCmwEgC5Vi8tvuGh:I8CgNPISQXsj/MlmYHOa/BJlwEgC5ViY
TLSH
T11C0402C1AD0753B3D59743334D26989CFE341A602A7ACF29F609EAE6E42111797BF132
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4124-0-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/4124-2-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/4496-10-0x0000000010000000-0x0000000010065000-memory.dmp

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memory/4496-11-0x000000001004A000-0x000000001004B000-memory.dmp

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memory/4496-12-0x0000000010000000-0x0000000010065000-memory.dmp

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memory/4496-14-0x0000000010000000-0x0000000010065000-memory.dmp

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memory/4496-15-0x0000000001420000-0x00000000014A7000-memory.dmp

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memory/5356-7-0x0000000000400000-0x000000000046D000-memory.dmp

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