Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250619-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250619-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/07/2025, 05:26

General

  • Target

    05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe

  • Size

    276KB

  • MD5

    82393db8e99c15a391c5be37af988267

  • SHA1

    2105ab908b23e88901e56ffaef98ec75716b3e5e

  • SHA256

    05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983

  • SHA512

    5afecc4357747729ae39cfb180f6c84cf06b04cc4af7c5378cc6902f1ce7496bb804b232222854cec65c923b629f8d62dae3a2da4fab6046b600a01de6b3b563

  • SSDEEP

    6144:g3P3Wg9pU+xWkDr468eIDFx1xJsktJ/PHqC:t+//eeyx1

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 (4661) 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\05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe
    "C:\Users\Admin\AppData\Local\Temp\05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:4860

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-4097847965-469305640-2969917343-1000\desktop.ini.tmp

          Filesize

          276KB

          MD5

          2f505940cef04def24e81e740f75c8a4

          SHA1

          375c05704e7a00d9cb44ea9b7293ab8a4d9de200

          SHA256

          69d3b297a18702f71b2e736953f37a84fd281e888fc5caaad1dc23f97e68fc78

          SHA512

          063859b123cdb517c1093dc51883574cce7ac95f3bd193b150d904fe62df7d89d2c716662fed7a5c702044853b46f5bbccd07d2ba6af8019e452a3cd4cddc4d6

        • C:\dc3d28e735b5c506d1b00a9a5a\2010_x86.log.html.tmp

          Filesize

          357KB

          MD5

          ac51cccef84a47ea43bc659c7ae130dd

          SHA1

          dbabc6c453a4486ea26fee5ae93d5412bed5b42d

          SHA256

          7e4771a0839674c3307cf359a29faf5cd0aad6d291271f825699212b8ae4792f

          SHA512

          df0c8cda3c001507eda199fd8a2b302595309c0130acf5f578822365c01b1ce4c4613e06e65c9857bae89b74ae0e1e3c3c04d0150d8d107f8586753ed1e447a6

        • memory/4860-663-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB