Analysis

  • max time kernel
    150s
  • max time network
    135s
  • 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, 10:03

General

  • Target

    1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe

  • Size

    19KB

  • MD5

    47767e2fdcb0df95f9aa2be6ad447f53

  • SHA1

    3d5a9b8848b3ea32c95734fe7523f6b36defc0cc

  • SHA256

    1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d

  • SHA512

    0e4ad12991c4efacdf03508ad9cf62808a8da61bc2da1f15f85745fddfda07ebfe9b02750d34de6607cd3ead8372e1462a9a3974a8c5d1545652aa735d9fe4c0

  • SSDEEP

    384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOdAwAJOgYAwAJOgPoAxpOiJfoAxpOiJT:uZ4FLz8ae+rOn8ae+rOewAJxrwAJxPou

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 (5276) 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\1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe
    "C:\Users\Admin\AppData\Local\Temp\1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:3676

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-3623617754-4043701611-775564599-1000\desktop.ini.tmp

          Filesize

          19KB

          MD5

          ba3ddf321d84d0526f2e018c65d5504b

          SHA1

          f6bd1d7062211a28c275dedca4aca8f13f3f6b70

          SHA256

          fe6e9bb563f76aeb52d9cb96e3566f1c05160f7edfd06b938fdc60a6dffbd368

          SHA512

          2faf4d91cf014a8eabc2a3c44c73ca6eabcdfaa21bdcfc04c72948dd22f218fbf68a5a92027eb56740a3332dd673b07d75a4b1511c8d3496ebb38575b30af336

        • C:\b96a7bef2438b67e1aee\2010_x86.log.html.tmp

          Filesize

          99KB

          MD5

          03d9c59692f8be71d784a775ee4754ed

          SHA1

          8e7f20c875e1a7f1069c1073efcd8bcd44d243e6

          SHA256

          08e84350c8ec052eea6cc11c8cef1688e10966c7acab37ef58f19358d4d4adb6

          SHA512

          cc264589d0707c7bbf2ab817c26e4ce9becb2adaf73611b07f527de48ea763547d338bd24786bb906053cba4ac3721e2c81c1ea4dad45199fb2088cca987ebd2

        • memory/3676-827-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB