Analysis

  • max time kernel
    150s
  • max time network
    103s
  • 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, 11:58

General

  • Target

    59b2f69e78dda87f83f15f064a25e40551c62878cebfc66e541f6bd79e67d42d.exe

  • Size

    133KB

  • MD5

    d01f29ca822ea6d0b65d4997aa8252a9

  • SHA1

    e3800ae952beed650dd328008460d730395d21f7

  • SHA256

    59b2f69e78dda87f83f15f064a25e40551c62878cebfc66e541f6bd79e67d42d

  • SHA512

    b2614f72ab9299e3bff94e6a2c8684d8733d4373c67b2d3b254f257109d25044d9eb392478c9efa708b00492f36f51c2faec70a6ab7c5bf334dbb8d845e2a6a7

  • SSDEEP

    1536:s7ZppApdIIXJUDJUzreQvow2GIIXJUDJUzreQvowe:spWp1reVwDreVwe

Malware Config

Signatures

  • Cosmu

    Cosmu is a Windows worm written in C++.

  • Cosmu family
  • Detects Cosmu payload 4 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (4860) 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\59b2f69e78dda87f83f15f064a25e40551c62878cebfc66e541f6bd79e67d42d.exe
    "C:\Users\Admin\AppData\Local\Temp\59b2f69e78dda87f83f15f064a25e40551c62878cebfc66e541f6bd79e67d42d.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:1636

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-434880884-4028056734-3558218839-1000\desktop.ini.tmp

          Filesize

          133KB

          MD5

          c572d88c68721eb90d68525c78b4b42c

          SHA1

          ab40795e7a1df08374b819a8a6c47bfbf0787fb3

          SHA256

          a2b23e49c7d8212372e311c881794077a15f7188da370ecfd8197a954172aeae

          SHA512

          a09a86d3681ed3f989b112bedebded3b24683a182841bd449111c288554ecf70593a22455a5d84291bccbcb1542f932c4be7d33f4a92c73d237dfa3a566385cb

        • C:\adad24410ad15e7b1e4f8836d3a6\2010_x86.log.html.tmp

          Filesize

          215KB

          MD5

          e3c5d8f638b47ddf1449ec98c0770030

          SHA1

          bffd78449867005c4813b30749c88ef10ab6c77c

          SHA256

          998d631e5fc66739a41a90d7342cdfcdf59d7f952bb7349c1e8254545d5b7866

          SHA512

          f3871258d76c6fe8764d83205c87b33eb73962f76711983763fc087552a6808264d0f5e50e343fccadb3f244cb04a010ddf55381f7bbf4d4cc1f20b1e6c336e8

        • memory/1636-0-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB

        • memory/1636-828-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB