Overview

overview

10

Static

static

10

2026-04-15...ry.exe

windows10-2004-x64

10

2026-04-15...ry.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    94s
  • max time network
    157s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    16/04/2026, 00:21

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General

  • Target
    2026-04-15_c26fccd4218356e04a69bc059b63f4dd_coinminer_elex_wannacry.exe
  • Size 901KB
  • Sample260416-anszjsfs2x
  • SHA256 cec2e1a71da6fdabe633e55593580231067e8c45612d18bfb8a3baeb8e321d66
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
discoverycosmuransomwareupxworm

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 (1277) 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
  • Drops startup file 1 IoCs
  • 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
  • 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\2026-04-15_c26fccd4218356e04a69bc059b63f4dd_coinminer_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-04-15_c26fccd4218356e04a69bc059b63f4dd_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:3228
    • 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\2026-04-15_c26fccd4218356e04a69bc059b63f4dd_coinminer_elex_wannacry.exe",1: >"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\x.vbs"
      2⤵
      • Drops startup file
      • System Location Discovery: System Language Discovery
      PID:4628
    • C:\Users\Admin\AppData\Local\Temp\2026-04-15_c26fccd4218356e04a69bc059b63f4dd_coinminer_elex_wannacry.exe
      C:\Users\Admin\AppData\Local\Temp\2026-04-15_c26fccd4218356e04a69bc059b63f4dd_coinminer_elex_wannacry.exe
      2⤵
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      PID:4252

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp
        • Path C:\$Recycle.Bin\S-1-5-21-1383858298-2057492509-1726743289-1000\desktop.ini.tmp
        • Size 901KB
        • SHA256 ace6c4d22f84a2f570ef12e7e2e54f6934d813012029dbbaf5639360d3683a0f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        7-zip.dll.tmp
        • Path C:\Program Files\7-Zip\7-zip.dll.tmp
        • Size 1000KB
        • SHA256 7696b1eb47439ba08ca1b321e7c6ef20145cb60290883513876043193bf67853
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/3228-0-0x0000000000400000-0x000000000046E000-memory.dmp
        Download

        memory/3228-1-0x000000000040C000-0x000000000040D000-memory.dmp
        Download

        memory/3228-6-0x0000000000400000-0x000000000046E000-memory.dmp
        Download

        memory/4252-3-0x0000000000400000-0x0000000000658000-memory.dmp
        Download

        memory/4252-7-0x0000000000400000-0x000000000040C000-memory.dmp
        Download

        memory/4252-5-0x0000000000400000-0x0000000000658000-memory.dmp
        Download

        memory/4252-4-0x0000000000400000-0x0000000000658000-memory.dmp
        Download