Overview

overview

10

Static

static

10

2026-08-03...ry.exe

windows10-2004-x64

10

2026-08-03...ry.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    03/08/2026, 17:10

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General

  • Target
    2026-08-03_b094ac0859bb4468bd68f9fdf2535671_coinminer_elex_wannacry.exe
  • Size 1.6MB
  • Sample260803-vpzhyacf66
  • SHA256 c52094c0f4acfee8e395d9dea38d02f7693ac8ff1355f5cc971068b10586b32a
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
discoveryexecutioncosmupersistenceprivilege_escalationransomwareupxworm

Malware Config

Signatures

  • Family: Cosmu

    Cosmu is a Windows worm written in C++.

    wormcosmu
  • Detects Cosmu payload 4 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (1603) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • UPX dump on OEP (original entry point) 4 IoCs
  • Creates a file in the Startup directory 1 TTPs 1 IoCs

    A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

    persistenceprivilege_escalation
  • Suspicious use of SetThreadContext 1 IoCs
  • UPX packed file 4 IoCs

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

    upx
  • Drops file in Program Files directory 64 IoCs
  • 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 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-03_b094ac0859bb4468bd68f9fdf2535671_coinminer_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-03_b094ac0859bb4468bd68f9fdf2535671_coinminer_elex_wannacry.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4576
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c echo on error resume next:CreateObject("WScript.Shell").Run "C:\Users\Admin\AppData\Local\Temp\2026-08-03_b094ac0859bb4468bd68f9fdf2535671_coinminer_elex_wannacry.exe",1: >"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\x.vbs"
      2⤵
      • Creates a file in the Startup directory
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      PID:2168
    • C:\Users\Admin\AppData\Local\Temp\2026-08-03_b094ac0859bb4468bd68f9fdf2535671_coinminer_elex_wannacry.exe
      C:\Users\Admin\AppData\Local\Temp\2026-08-03_b094ac0859bb4468bd68f9fdf2535671_coinminer_elex_wannacry.exe
      2⤵
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      PID:1752

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp
        • Path C:\$Recycle.Bin\S-1-5-21-204488895-2999877624-296153668-1000\desktop.ini.tmp
        • Size 1.6MB
        • SHA256 1428bc92b2e74845d2d6ff9403656207ebb555201c9d76d89f5907b3389d437e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        7-zip.dll.tmp
        • Path C:\Program Files\7-Zip\7-zip.dll.tmp
        • Size 1.7MB
        • SHA256 d55e3da50969d366df3e7bdd336721ea79d07e54e96e424885356112cb8e7e08
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1752-3-0x0000000000400000-0x0000000000658000-memory.dmp
        Download

        memory/1752-4-0x0000000000400000-0x0000000000658000-memory.dmp
        Download

        memory/1752-6-0x0000000000400000-0x000000000040C000-memory.dmp
        Download

        memory/1752-5-0x0000000000400000-0x0000000000658000-memory.dmp
        Download

        memory/4576-0-0x0000000000400000-0x000000000046E000-memory.dmp
        Download

        memory/4576-1-0x000000000040C000-0x000000000040D000-memory.dmp
        Download

        memory/4576-7-0x0000000000400000-0x000000000046E000-memory.dmp
        Download