Overview

overview

10

Static

static

3

2026-08-07...ry.exe

windows10-2004-x64

10

2026-08-07...ry.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    07/08/2026, 10:18

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General

  • Target
    2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_elex_wannacry.exe
  • Size 107KB
  • Sample260807-mb479sfc49
  • SHA256 4ee9684105d18a1e2c8acde9e9b8ba38daf1ed784afa29d994ef082581a9eefe
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
backdoorbootkitdiscoveryexecutionfarflipersistencespywarestealerupx

Malware Config

Signatures

  • Family: Farfli

    Farfli is a Windows backdoor written in C++.

    backdoorfarfli
  • Detects Farfli Backdoor 5 IoCs
  • Detects executables containing base64 encoded User Agent 5 IoCs
  • UPX dump on OEP (original entry point) 8 IoCs
  • Badlisted process makes network request 8 IoCs

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

  • ACProtect 1.3x - 1.4x DLL software 1 IoCs

    Detects file using ACProtect software.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • 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.

    bootkitpersistence
  • UPX packed file 7 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • Executes a command shell one-liner 1 TTPs 1 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

    execution
  • 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 Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

    discovery
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_elex_wannacry.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4524
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&c:\kffct.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_elex_wannacry.exe"
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:2244
      • 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:3220
      • \??\c:\kffct.exe
        c:\kffct.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_elex_wannacry.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2952
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\hfexgv\zejxv.dll",init c:\kffct.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:3912

Network

        MITRE ATT&CK Enterprise v16

        Reconnaissance

        Resource Development

        Initial Access

        Execution

        Command and Scripting Interpreter

        1
        T1059

        Windows Command Shell

        1
        T1059.003

        Persistence

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Pre-OS Boot

        1
        T1542

        Bootkit

        1
        T1542.003

        Privilege Escalation

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Defense Evasion

        Modify Registry

        1
        T1112

        Pre-OS Boot

        1
        T1542

        Bootkit

        1
        T1542.003

        Credential Access

        Credentials from Password Stores

        1
        T1555

        Credentials from Web Browsers

        1
        T1555.003

        Unsecured Credentials

        1
        T1552

        Credentials In Files

        1
        T1552.001

        Discovery

        Peripheral Device Discovery

        1
        T1120

        Query Registry

        2
        T1012

        Remote System Discovery

        1
        T1018

        System Information Discovery

        2
        T1082

        System Location Discovery

        1
        T1614

        System Language Discovery

        1
        T1614.001

        System Network Configuration Discovery

        1
        T1016

        Internet Connection Discovery

        1
        T1016.001

        Lateral Movement

        Collection

        Data from Local System

        1
        T1005

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

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        Downloads

        kffct.exe
        • Path C:\kffct.exe
        • Size 107KB
        • SHA256 de221588be23e53b8d5a848683c62cc29d895a13b75a0616851b43ef718bd585
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        zejxv.dll
        • Path \??\c:\hfexgv\zejxv.dll
        • Size 46KB
        • SHA256 b6bc7902da0250f6ca920b35b222f6a0fe62102caf05d2a1722c4d3b225a0a9e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/2952-7-0x0000000000400000-0x0000000000417000-memory.dmp
        Download

        memory/3912-10-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/3912-11-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/3912-13-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/3912-14-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/3912-15-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/3912-16-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/4524-0-0x0000000000400000-0x0000000000417000-memory.dmp
        Download

        memory/4524-2-0x0000000000400000-0x0000000000417000-memory.dmp
        Download