Analysis

  • max time kernel
    150s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250502-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250502-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/06/2025, 08:15

General

  • Target

    87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe

  • Size

    22KB

  • MD5

    8b2f4ef74e4a20c23bc281110705ab70

  • SHA1

    b723dcc235faa790924821c84cd9d375fbae180c

  • SHA256

    87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182

  • SHA512

    88e19e4080ac010f41c5a83b26c5b6183025ad120681fe3fa50a80f4c2d54ec34ab394e2965318394226471c3d6f146cbabe63048132d2296b8fc3fe3a389ff9

  • SSDEEP

    384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOiOZ2OZW0i90ixyX:uZ4FLz8ae+rOn8ae+rOWdxyX

Malware Config

Signatures

  • Cosmu

    Cosmu is a Windows worm written in C++.

  • Cosmu family
  • Detects Cosmu payload 1 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (5202) files with added filename extension

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

  • Drops file in Program Files directory 64 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

Processes

  • C:\Users\Admin\AppData\Local\Temp\87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe
    "C:\Users\Admin\AppData\Local\Temp\87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:876

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-2930597513-779029253-718817275-1000\desktop.ini.tmp

          Filesize

          22KB

          MD5

          56135ee3d744744214eb0fd55955c1bc

          SHA1

          251fc7a1d97604939b8cee4ffb916547a1bfaa7b

          SHA256

          a7934236cbf9179fe2d583b9e79fbcd1d96af5d2e9ab3185924e4623d72ef60a

          SHA512

          f577f1d33f85b89b474f8ae6cb874c09b3cbe259c4cdaff7ea246adfbfe149b38428b5b124302ad376e55cbd803703ace7da43227f14651fd284dfb02874e00d

        • C:\6479eedf55783993fe56765264\2010_x86.log.html.tmp

          Filesize

          103KB

          MD5

          2db6992748cc1b812a5cafa6d36ec611

          SHA1

          d7a4fbf5e4ca97fed1c7cf904cfc87e440a3e506

          SHA256

          5a02354cbc7d6faea39461f7c560e0209895238b287e14751c0294f870f550ce

          SHA512

          589b6a7121f1a99144c677c9013f06e4e08fa98344101b2b3c0584928b974ffc5216ba2deb13adeb55b7817b28868ea6bba4cf22b8bed28f1b5f1dd3dbcbfe91

        • memory/876-797-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB