Overview

overview

10

Static

static

10

2026-04-21...ry.exe

windows10-2004-x64

10

2026-04-21...ry.exe

windows11-21h2-x64

10

Sharing

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General

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

Malware Config

Targets

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

    • Detects Cosmu payload

      Cosmu is a worm written in C++.

    • Family: Cosmu

      Cosmu is a Windows worm written in C++.

      wormcosmu
    • Custom signature

      Detects executables packed with eXPressor

    • Renames multiple (3396) files with added filename extension

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

      ransomware

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

      spywarestealer

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks