Overview

overview

10

Static

static

10

2026-08-20...op.exe

windows10-2004-x64

10

2026-08-20...op.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    148s
  • 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, 00:09

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General

  • Target
    2026-08-20_64a7c4567b413abbc2a94f51c3996060_amadey_coinminer_elex_redline-stealer_rhadamanthys_smoke-loader_stealc_stop.exe
  • Size 122KB
  • Sample260821-afnpvsyake
  • SHA256 842432fef1d6214877b0cbe024250f00dca0a57f52f2195483fd73ff2e996fca
  • 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 1 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (4418) 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_64a7c4567b413abbc2a94f51c3996060_amadey_coinminer_elex_redline-stealer_rhadamanthys_smoke-loader_stealc_stop.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-20_64a7c4567b413abbc2a94f51c3996060_amadey_coinminer_elex_redline-stealer_rhadamanthys_smoke-loader_stealc_stop.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4624
    • C:\Users\Admin\AppData\Local\Temp\_arh.exe
      "_arh.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:5152
    • 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:3672

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.tmp
        • Path C:\$Recycle.Bin\S-1-5-21-3797332335-34111092-3597280141-1000\desktop.ini.tmp
        • Size 38KB
        • SHA256 59c660c48a001030e264e17e5e9c03a4a797ddc9f64a1ce9da3396f6cffcbd71
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _arh.exe
        • Path C:\Users\Admin\AppData\Local\Temp\_arh.exe
        • Size 84KB
        • SHA256 85012194a74546c1bdf1c921f58a541b12931d0b44993fdf516f51d800d4dd88
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Zombie.exe
        • Path C:\Windows\SysWOW64\Zombie.exe
        • Size 37KB
        • SHA256 248c745c15bfc8080621b4720c531319d5dc1b7bab223b08e3dcd182d52d861e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/4624-0-0x0000000000400000-0x000000000040A000-memory.dmp
        Download

        memory/4624-25-0x0000000000400000-0x000000000040A000-memory.dmp
        Download