Overview

overview

10

Static

static

10

2026-06-05...ry.exe

windows10-2004-x64

10

2026-06-05...ry.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    95s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    05/06/2026, 22:28

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General

  • Target
    2026-06-05_4113fdce76a9dff6bd1bf96d8fd4a7c6_cobalt-strike_elex_vidar_wannacry.exe
  • Size 82KB
  • Sample260605-2ds1caew2t
  • SHA256 18c79d4cc4e547c8a5dd6d40ce3ac631528bb8c88626f9be11d9105b5a632014
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
discoverycosmuransomwareworm

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++.

  • Detects executables packed with eXPressor 4 IoCs
  • Renames multiple (5354) files with added filename extension

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

    ransomware
  • Executes dropped EXE 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 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\2026-06-05_4113fdce76a9dff6bd1bf96d8fd4a7c6_cobalt-strike_elex_vidar_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-06-05_4113fdce76a9dff6bd1bf96d8fd4a7c6_cobalt-strike_elex_vidar_wannacry.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2036
    • 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:4116
    • C:\Users\Admin\AppData\Local\Temp\_createdump.exe
      "_createdump.exe"
      2⤵
      • Executes dropped EXE
      PID:4824

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        desktop.ini.exe
        • Path C:\$Recycle.Bin\S-1-5-21-2043432456-1617298091-2772621413-1000\desktop.ini.exe
        • Size 26KB
        • SHA256 61759c4e112e220d1c7b0cb67aad58d21d30b75bea749fbbff44b8938ef0ea50
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _createdump.exe
        • Path C:\Users\Admin\AppData\Local\Temp\_createdump.exe
        • Size 56KB
        • SHA256 5113e7ae92f3a7aebc7f8e363209866d4d743b06a26c67e0886979a56fd3a10d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Zombie.exe
        • Path C:\Windows\SysWOW64\Zombie.exe
        • Size 26KB
        • SHA256 d3f773f3ab16909b36383352d00f08516af1178ca867cc439cc4b6a08e379b52
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/2036-0-0x0000000000400000-0x000000000040A000-memory.dmp
        Download

        memory/2036-21-0x0000000000400000-0x000000000040A000-memory.dmp
        Download