Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250610-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250610-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/07/2025, 05:26

General

  • Target

    d1583f19bce89b61829f036bb1856cbc8eb5a912bb6e2672e6d9806edba192b0.exe

  • Size

    28KB

  • MD5

    6ba02c3b1bbd1f3526e98624a714f317

  • SHA1

    91d9f99383564c255d50fb326f54232bbe6d9b6c

  • SHA256

    d1583f19bce89b61829f036bb1856cbc8eb5a912bb6e2672e6d9806edba192b0

  • SHA512

    1bc2e6b737a2731cf82a46adddc5786046dafcdc9d24549c729c7d7c03487a048775bdf524918267a78d11b2c69f834fdc985771ba6b513f13eb0fa76b94767c

  • SSDEEP

    768:uZ4FLm8Q8Boxn6oxSoxn6ox1YFlLYFlnb9g:uGsx1xtx1xWgn9g

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 (5289) 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\d1583f19bce89b61829f036bb1856cbc8eb5a912bb6e2672e6d9806edba192b0.exe
    "C:\Users\Admin\AppData\Local\Temp\d1583f19bce89b61829f036bb1856cbc8eb5a912bb6e2672e6d9806edba192b0.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:5292

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-155457276-1657131288-1088518942-1000\desktop.ini.tmp

          Filesize

          28KB

          MD5

          ac69af776d05308edac6aee0181109a1

          SHA1

          aff2c3f37ce8ac3d68b71131c0375b2557136ab7

          SHA256

          8b17fd22683ed738bdd8afd9596edee97a0834fa492587bbc247cad1a3c3afcb

          SHA512

          273aab6eb3ba841073f6632146f53dc88f5d83260359a8cbaa6c3811ba0a4f71be3601ad6d9ec86c933af60067aee371b2a2383dec6f239d06fcae99d59e626f

        • C:\986617b463e82ad7a3\2010_x86.log.html.tmp

          Filesize

          108KB

          MD5

          a429c0be7ab33a3562878ea3ec3abd16

          SHA1

          d7f782a3439319d2b433ebe6b6631307af16f93b

          SHA256

          aabe390af57d6d924093804dd341e61d2c4301efb4d2b5048f533dcfcbffcb6c

          SHA512

          8bd3a4012cb1f911ecef3458453a60e5062640a88375ae6932c2602e23603924983199914c2ae22d375aac5e62964a65484286232f788a8edf54da403c1f3d87

        • memory/5292-797-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB