Overview

overview

10

Static

static

10

2026-08-20...ry.exe

windows10-2004-x64

10

2026-08-20...ry.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    21/08/2026, 00:49

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General

  • Target
    2026-08-20_1df79a0bf453d088bb4602905bca191a_coinminer_elex_wannacry.exe
  • Size 606KB
  • Sample260821-a6nsjsdr21
  • SHA256 f41afd3943ebdb8dc9e926f3730e94889af7e77c84f3afd6eef2839e6e0b2979
  • 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 (4349) 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
  • Executes dropped EXE 2 IoCs
  • Drops file in System32 directory 2 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 use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-20_1df79a0bf453d088bb4602905bca191a_coinminer_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-20_1df79a0bf453d088bb4602905bca191a_coinminer_elex_wannacry.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1372
    • C:\Users\Admin\AppData\Local\Temp\_dwtrig20.exe
      "_dwtrig20.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:5856
    • C:\Windows\SysWOW64\Zombie.exe
      "C:\Windows\system32\Zombie.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      PID:1556

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp
        • Path C:\$Recycle.Bin\S-1-5-21-3989226554-2204910950-1522900112-1000\desktop.ini.tmp
        • Size 99KB
        • SHA256 ee21993a57890161c90e73db89f4b5f24267cff038492755872c4b0e3d21920d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _dwtrig20.exe
        • Path C:\Users\Admin\AppData\Local\Temp\_dwtrig20.exe
        • Size 507KB
        • SHA256 a1dfa6639bef3cb4e41175c43730d46a51393942ead826337ca9541ac210c67b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Zombie.exe
        • Path C:\Windows\SysWOW64\Zombie.exe
        • Size 99KB
        • SHA256 24260179ca01ec8453bc7cec278ed5850843395b7359c50dbc82947fa26fc3ce
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1372-0-0x0000000000400000-0x000000000040B000-memory.dmp
        Download

        memory/1372-16-0x0000000000400000-0x000000000040B000-memory.dmp
        Download