Overview

overview

10

Static

static

3

2026-05-03...ry.exe

windows10-2004-x64

10

2026-05-03...ry.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    26s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    03/05/2026, 13:12

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General

  • Target
    2026-05-03_211962f1ae4ab5d93f69b625760c55c0_elex_wannacry.exe
  • Size 102KB
  • Sample260503-qfmessds4k
  • SHA256 93e2e0ba4ad3a3352b0d3d675832a8d82e501a7fe8b08f8a9e9c68813b504c58
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
backdoorbootkitdiscoveryfarflipersistenceupx

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 2 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
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • 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
  • 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
  • Runs ping.exe 1 TTPs 1 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\2026-05-03_211962f1ae4ab5d93f69b625760c55c0_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-05-03_211962f1ae4ab5d93f69b625760c55c0_elex_wannacry.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4268
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&c:\ullbvxpzk.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-03_211962f1ae4ab5d93f69b625760c55c0_elex_wannacry.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:4696
      • 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:3668
      • \??\c:\ullbvxpzk.exe
        c:\ullbvxpzk.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-03_211962f1ae4ab5d93f69b625760c55c0_elex_wannacry.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3808
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\nqebnhhl\buukf.dll",init c:\ullbvxpzk.exe
          4⤵
          • Badlisted process makes network request
          • Loads dropped DLL
          • Adds Run key to start application
          • Writes to the Master Boot Record (MBR)
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:1116

Network

        MITRE ATT&CK Enterprise v16

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        Downloads

        buukf.dll
        • Path C:\nqebnhhl\buukf.dll
        • Size 46KB
        • SHA256 b6bc7902da0250f6ca920b35b222f6a0fe62102caf05d2a1722c4d3b225a0a9e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ullbvxpzk.exe
        • Path \??\c:\ullbvxpzk.exe
        • Size 102KB
        • SHA256 c165a3b575cbec490fc60ddf75b5cd33fd1e78e8ba6dcbea6c13c8493ae557d0
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1116-10-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/1116-11-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/1116-13-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/1116-14-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/1116-15-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/1116-16-0x0000000010000000-0x0000000010024000-memory.dmp
        Download

        memory/3808-7-0x0000000000400000-0x0000000000417000-memory.dmp
        Download

        memory/4268-0-0x0000000000400000-0x0000000000417000-memory.dmp
        Download

        memory/4268-2-0x0000000000400000-0x0000000000417000-memory.dmp
        Download