Analysis

  • max time kernel
    149s
  • max time network
    138s
  • 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, 10:01

General

  • Target

    21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe

  • Size

    78KB

  • MD5

    b4aaa7de6d064f1a58885297067a4e28

  • SHA1

    f353c9db32b0db2134443d83a99ef677d6957a8b

  • SHA256

    21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17

  • SHA512

    8051a25922104d956483263cbdef375e8a62eab38c013acc7b97bf82af426cb7d1c6217596142355eda3335f2376ccd66a19a5ee08b5de044d2243b23c2e514e

  • SSDEEP

    1536:uGIINlsPKe9Tdxz2dmn2ja+ZhuB0oEvBnHHwTVEvBnHHwTEu7x:LehXz2ja+PuioT/

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 (5036) 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\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe
    "C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:2692

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-3342576763-1998465526-3870295501-1000\desktop.ini.tmp

          Filesize

          78KB

          MD5

          422541587a88bc79c5d4387c06afd1f2

          SHA1

          d897594e6f07393733dafe248f284522a1fe4a1a

          SHA256

          1b970e34dd6c1dc77a305ddf4bd42cc245c8c9bee772a88034bde5c640762998

          SHA512

          f23e314741607faae40b00b9d8140426ef102e0cb5f835a1c3bfbd815ed4566e05e8c556f3f6bae7d8d2cf04be6067fec585f36a9821eb5dc7afccc4a0ed0882

        • C:\fa79de221d524b769d0447\2010_x64.log.html.tmp

          Filesize

          164KB

          MD5

          c096d20908483d2f4e8939fad5727d31

          SHA1

          bf1cc1764853c8de0532782f6d4baeee9d11cc24

          SHA256

          514bc06a6ecaa803d0ed247c736584accd8f6de5488bf99f5483f3750017d727

          SHA512

          c240783ab827c859775134a661c187cfa28f6212306ffbc3856db328da13f56c5090ba3245b2cb81693c97e85c3462177652362cb79b240a8ce02f044b5a00b0

        • memory/2692-797-0x0000000000400000-0x0000000000407000-memory.dmp

          Filesize

          28KB