farfli | 8a16838631a8137baa0f141fac67ba162295f776edebf63ce92cae559b73bce9

Analysis

max time kernel
149s
max time network
143s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-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
behavioral2/memory/4888-12-0x0000000010000000-0x0000000010065000-memory.dmp	family_farfli
behavioral2/memory/4888-14-0x0000000010000000-0x0000000010065000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4888-12-0x0000000010000000-0x0000000010065000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4888-14-0x0000000010000000-0x0000000010065000-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
1	4888	rundll32.exe
3	4888	rundll32.exe
4	4888	rundll32.exe
5	4888	rundll32.exe
6	4888	rundll32.exe
7	4888	rundll32.exe
8	4888	rundll32.exe
11	4888	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3468	wywvd.exe

Executes dropped EXE 1 IoCs

pid	Process
3468	wywvd.exe

Loads dropped DLL 1 IoCs

pid	Process
4888	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-1-5-21-1383858298-2057492509-1726743289-1000\Software\Microsoft\Windows\CurrentVersion\Run\Axpol = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\kpnesj\\fohex.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)	\??\x:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\q:	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	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
4888	rundll32.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\kpnesj	wywvd.exe
File created	\??\c:\Program Files\kpnesj\fohex.dll	wywvd.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	wywvd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
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

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
1452	cmd.exe
3572	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
3572	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe
4888	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4888	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3388	2026-04-27_a65e6caec8d524b58be59689830006a5_elex_wannacry.exe
3468	wywvd.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3388 wrote to memory of 1452	3388	2026-04-27_a65e6caec8d524b58be59689830006a5_elex_wannacry.exe	80
PID 1452 wrote to memory of 3572	1452	cmd.exe	82
PID 1452 wrote to memory of 3468	1452	cmd.exe	83
PID 3468 wrote to memory of 4888	3468	wywvd.exe	84

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:3388
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\wywvd.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:1452
- - 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:3572
- - C:\Users\Admin\AppData\Local\Temp\wywvd.exe
    C:\Users\Admin\AppData\Local\Temp\\wywvd.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:3468
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\kpnesj\fohex.dll",ZipCompress C:\Users\Admin\AppData\Local\Temp\wywvd.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:4888

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

wywvd.exe

Path C:\Users\Admin\AppData\Local\Temp\wywvd.exe
Size 437KB
SHA256 77b5bdf432353a2045bc304bea7e731424e712c4261fe67240d3a1ce4ee1726f
MD5 03c781a1fdb4f8705e4b9f87a5fb4c0d
SHA1 9d5f3f59c46072a45f3fe03f0fe6a340eb29544f
SHA512 d0f7534adfcb3eb31bf5abd8f7f454acfa0deded6b75fc42cd9046910a2610f6f54b17736d82a528e6d7d22780c4e2877b573c0fa9a5fcf7acf94874ff4de995
SSDEEP 6144:BAzMDuL6wVQ+jex2envjZMqLNC95Cw8PEPHV0eXT:W5HjS2KlfLNo5CwKcz
TLSH
T14894A25163F94608F6F77F7CAA792E7C4A76FC9EEC38C65C0252405F59B1A5088A0B23
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fohex.dll

Path \??\c:\Program Files\kpnesj\fohex.dll
Size 180KB
SHA256 3f605fdaa9f5017bee80050bc2aa3bb78f82cbdc309a17d25f5ee0321708fe0c
MD5 6070c9a408a6684daf930f3f60ee1fc6
SHA1 21b8fc6ce8c4a990391512edbb88473e2a8f3083
SHA512 33d91e1c73f727883fa35610e427d05d3cf7add9946eb7d550d0cb7069477902eec7b4eef4b6337b1a516366885d19659d2785b663780968de072d969a552eb5
SSDEEP 3072:R/q9D8TGRg+2P0XSE0+7GHms91/Eg+lJKkarUTKeaVa/+UJCmwEgC5Vi8tvuG6:I8CgNPISQXsj/MlmYHOa/BJlwEgC5Vix
TLSH
T1060402C1AD0753B3D15743734D26989CFF341A602A7ACF29F209EAA6E42111797BF132
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3388-0-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/3388-2-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/3468-7-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/4888-10-0x0000000010000000-0x0000000010065000-memory.dmp

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memory/4888-11-0x000000001004A000-0x000000001004B000-memory.dmp

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memory/4888-12-0x0000000010000000-0x0000000010065000-memory.dmp

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memory/4888-14-0x0000000010000000-0x0000000010065000-memory.dmp

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