Analysis

  • max time kernel
    149s
  • max time network
    102s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250502-en
  • resource tags

    arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-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 (5362) 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:6048

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-779059454-4269757009-3780780039-1000\desktop.ini.tmp

          Filesize

          19KB

          MD5

          2c6feb9aa35d8f92824e7225aea234a1

          SHA1

          624a10975f875fa55c7ce4b4a3cbe9641cc5e13d

          SHA256

          d1a0bb2549d98863571a4b4bd280ad424c190d5c1b1bf736856c75cd23b8d0c7

          SHA512

          f326dba456321e28e32384582addf8d7b3a72a476279fb3d0bd0a48618fe108c2f894ef6968e52df7778a3a16d845126093147ddf64b56f9576fd254b313fdb1

        • C:\e62b36dd3cccbd0b2c8aefa1fa8db0\2010_x86.log.html.tmp

          Filesize

          100KB

          MD5

          22b673a002e8832b8362b843f881856e

          SHA1

          8d32af9a6459e772b2ea0e05888cf43d0de331e3

          SHA256

          36b30e4fc43bbe2fdc134d45eb288ade2a5e33248f6ec91222bf4c4eea144f2e

          SHA512

          fa8c8760887ef3329258984c918c6c5a9d5118256b5f7d45fdf29d7bde2260151638432d97ed32ed0b465b4a5b334b6444d00a94b1704bfb68320751373da178

        • memory/6048-1233-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB