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
  • max time network
    127s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260710-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    20/08/2026, 23:12

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General

  • Target
    2026-08-20_dffa3925b7ad6c98f44cb41b3f6e5588_coinminer_elex_wannacry.exe
  • Size 241KB
  • Sample260820-262sysxbka
  • SHA256 e9e579161fda6a2c705eb8f06c03d26a7c09ca250e6527a8d93da85b795d9ffb
  • 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 (4236) 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_dffa3925b7ad6c98f44cb41b3f6e5588_coinminer_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-20_dffa3925b7ad6c98f44cb41b3f6e5588_coinminer_elex_wannacry.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3936
    • C:\Users\Admin\AppData\Local\Temp\_WCChromeNativeMessagingHost.exe
      "_WCChromeNativeMessagingHost.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:5348
    • 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:3156

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp
        • Path C:\$Recycle.Bin\S-1-5-21-2301830172-776172150-2531349243-1000\desktop.ini.tmp
        • Size 99KB
        • SHA256 a8af80629dee7031fc34353e9195381dfb18f13f2d7720c4572e2ae81ceba42a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _WCChromeNativeMessagingHost.exe
        • Path C:\Users\Admin\AppData\Local\Temp\_WCChromeNativeMessagingHost.exe
        • Size 142KB
        • SHA256 ffe2bec6f24a90f2d5009cd377e88e4540e38fb6c2efe653aab0ecc4bd3e3ce4
        • 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/3936-0-0x0000000000400000-0x000000000040B000-memory.dmp
        Download

        memory/3936-432-0x0000000000400000-0x000000000040B000-memory.dmp
        Download