Analysis

  • max time kernel
    150s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250502-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250502-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/06/2025, 07:23

General

  • Target

    da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe

  • Size

    99KB

  • MD5

    2a613767e1bb05dc94ad3cb216e2c243

  • SHA1

    4a75bf8843c50508b890983cdb011a937cb28f6c

  • SHA256

    da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5

  • SHA512

    44df6dd3c06c50c7db8a8513a6fc77b784c05ba0100f4ecfcaf01d64720db0cb5e87425113322cdc6f5de2d5a95e9c0a5fa4feefed065cc92b41b83b78cb568d

  • SSDEEP

    1536:s7ZppApdIIyBoLqrNkW1zN0m0lG1tETSA6P:spWpsBsqrNkMzN0mx7Sr6P

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 (4951) 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\da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe
    "C:\Users\Admin\AppData\Local\Temp\da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:4740

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

          99KB

          MD5

          ca0e61703cc64da43fc0c4ba7c03ef4e

          SHA1

          c73ec86751cc10b153ea2075f4959e5d8f5a8b70

          SHA256

          437d55313af7a9f38109cd899fbab1e44ef2b76b2ddf2b82dd389d250e00be50

          SHA512

          cfd1cc53ce80ffd00225daf606c663558c2026b47df7ccfc5cacea183aea3e8e31abeda602786c06fc5e0f808538c78d6a858230407f3b0f6e45ad26b4080723

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

          Filesize

          184KB

          MD5

          e112c8ad0fa9e3fb859191c3977a964e

          SHA1

          6c934a05256e78457940cb6e3c01e81d3a7438ac

          SHA256

          8957985095f3cde55c05132547c5c0535e78a9d30f2f75df043eb81d64d07c79

          SHA512

          c750515b49e78665847eb64e6bd5c226d52c5ea41e578ce9c5f82168e19568b3241925b705e3f7f7e2df3eef0b26076ad8e742107cb579db39f9b2a6f95ce6cc