Analysis

  • max time kernel
    150s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250502-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250502-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/05/2025, 10:01

General

  • Target

    1705207dec682ebd7df90665c61d3283a7c3ec84ae3fe21cdda0c940601855a3.exe

  • Size

    66KB

  • MD5

    cd658d188b84374422d8941d05503cc5

  • SHA1

    4fd03294e2eb761d99cbee2b006d25c3f891729e

  • SHA256

    1705207dec682ebd7df90665c61d3283a7c3ec84ae3fe21cdda0c940601855a3

  • SHA512

    5c221820da29899167c39b70f3281ad12168f4c3d1fe44814fa35b9ded491c5c40abdee5bd4876f5538bd15d1e0899323b52927b28015794e7e38206a2cb2987

  • SSDEEP

    384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOIW2JhuC2JhuOxAxoraygJmMvJvx:uZ4FLz8ae+rOn8ae+rOoJhiJhY9

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 (4871) 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\1705207dec682ebd7df90665c61d3283a7c3ec84ae3fe21cdda0c940601855a3.exe
    "C:\Users\Admin\AppData\Local\Temp\1705207dec682ebd7df90665c61d3283a7c3ec84ae3fe21cdda0c940601855a3.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:4512

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

          66KB

          MD5

          edbe4d583f2a516e7f4c883a11ff9f18

          SHA1

          1b807679a2d9caf661f3ae772b3b999da8e549b9

          SHA256

          c9f68b728bdd6dfe300d98110f51f6f3c93b0d4cc0972c572f9f483988fc4bdc

          SHA512

          0c55366fbfa0fe50a0c65c2f3ce7f42ec5f85c0ddada8e2d189d45d61a7b9a2ea9be85200ff7de2cf51f79570f26f81732fd3a351afb3696684be9044cc53cab

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

          Filesize

          147KB

          MD5

          e65d35fb4c1f01e8b865b4ed79582c1e

          SHA1

          4e6446f8fd404bfac6c4800bce34cdda7a3d814d

          SHA256

          fe009a3b2f61127346f0e780c80c42e716a02987019e00ed06d013fa945c466b

          SHA512

          9d97d9b24eab88afdaa02fe9d4da85ad950ebeb29d82f96edf11cc796b67ef52ed028ee8582e60bd5f3b031e25a84236c9113ea06140a891d35c55aacd6db1b6

        • memory/4512-791-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB