Analysis

  • max time kernel
    149s
  • max time network
    144s
  • 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, 10:04

General

  • Target

    28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe

  • Size

    34KB

  • MD5

    c723f0584ef526efa1f1eaea94df14d8

  • SHA1

    b984a485db4a2f68effbe007c5f78585ddc53b0a

  • SHA256

    28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f

  • SHA512

    ac3db58129c3e04a214ef3deee51a01bb2298523979724e1ddbd27a3ffc46bc5851301226592539453ff7f245a66c7d15e34a0751d360f94ddda69f2ef022bb9

  • SSDEEP

    768:s7BlpppARFbhdLz8ae+rOn8ae+rO+4500n1kJ00n1khxhxz:s7ZppApdII+49101az1

Malware Config

Signatures

  • Cosmu

    Cosmu is a Windows worm written in C++.

  • Cosmu family
  • Detects Cosmu payload 2 IoCs

    Cosmu is a worm written in C++.

  • Renames multiple (5194) 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\28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe
    "C:\Users\Admin\AppData\Local\Temp\28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:2088

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-186956858-2143653872-2609589082-1000\desktop.ini.tmp

          Filesize

          35KB

          MD5

          9ec932f5250045049bb68e0473f13250

          SHA1

          4398889f84988bc8157a11324e6fee3ed0c37f30

          SHA256

          e3f8ba4d49d53c56479104c41231f3670089c354ecb6fee6434c1c6b25356424

          SHA512

          2e8b22b128a3d46b8b683e75b14d0db20486124d428e0bbfd8073b15d4b98bfe04fa7bda9922ad917193d3d550b90ebce30c2a96de81690fb55412304580d1a2

        • C:\d962f70874f5d4bfc1c6\2010_x64.log.html.tmp

          Filesize

          120KB

          MD5

          b86b54057ffff726de20a5f253fa0aa2

          SHA1

          f7bf5a306d3cebef88a813d3cb23503def6fed0c

          SHA256

          665bed7e0ed58376932abbfb7b3be205669f9441156c263cc831dd1c3d73ec94

          SHA512

          7cd07a01a208063521248a463bc813c579bb25bc2126969d0bc4420b9eeaafa20bef7604287a743c944b5ae5fc70f16d6a1ec0426b99d9011a4f241b681aca58