Overview

overview

10

Static

static

10

2026-04-21...ry.exe

windows10-2004-x64

10

2026-04-21...ry.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    21/04/2026, 23:24

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    2026-04-21_af9d8c9a0961dd768c1ba59304dd4a7f_cobalt-strike_elex_hijackloader_vidar_wannacry.exe
  • Size 511KB
  • Sample260421-3dvplshs8v
  • SHA256 c0a92327650bd61614231f507723e01fb8f7c69ceec911f79b1fce401fa3f40c
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
discoverycosmuransomwarespywarestealerworm

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++.

  • Custom signature
    Detects executables packed with eXPressor 4 IoCs
  • Renames multiple (3575) files with added filename extension

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

    ransomware
  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

    discovery
  • 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 behavior: EnumeratesProcesses 18 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-04-21_af9d8c9a0961dd768c1ba59304dd4a7f_cobalt-strike_elex_hijackloader_vidar_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-04-21_af9d8c9a0961dd768c1ba59304dd4a7f_cobalt-strike_elex_hijackloader_vidar_wannacry.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3128
    • 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:2000
    • C:\Users\Admin\AppData\Local\Temp\_AcroServicesUpdater2_x64.exe
      "_AcroServicesUpdater2_x64.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:4488

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        desktop.ini.exe
        • Path C:\$Recycle.Bin\S-1-5-21-1383858298-2057492509-1726743289-1000\desktop.ini.exe
        • Size 392KB
        • SHA256 6e05e5c430defbc44751c7ae6f93d6433dd5738526d895501c17d946ff62daaf
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        S3[1].htm
        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\28VRDO1Y\S3[1].htm
        • Size 13B
        • SHA256 b633a587c652d02386c4f16f8c6f6aab7352d97f16367c3c40576214372dd628
        • MD5 SHA1 SHA512
        Submit Download

        _AcroServicesUpdater2_x64.exe
        • Path C:\Users\Admin\AppData\Local\Temp\_AcroServicesUpdater2_x64.exe
        • Size 119KB
        • SHA256 99727a25e431134f75c9342ca608d1007ea31733f7fd4dda32356e5e36c23f9b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Zombie.exe
        • Path C:\Windows\SysWOW64\Zombie.exe
        • Size 392KB
        • SHA256 94b7efe325b4efc629383785d00ec3a65412d817a8ea048dc85a6cc04e87d9fc
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/2000-10-0x0000000000400000-0x000000000040A000-memory.dmp
        Download

        memory/3128-0-0x0000000000400000-0x000000000040A000-memory.dmp
        Download

        memory/4488-229-0x00000254F1120000-0x00000254F11F6000-memory.dmp
        Download