Analysis

  • max time kernel
    149s
  • max time network
    142s
  • 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

    241eafe0509458d94b68bff75fd8ad2c8d13e67bdcafe579ada2f7736c11a163.exe

  • Size

    64KB

  • MD5

    f76ceb54bff59e4541d510966d158d6e

  • SHA1

    56c4adf27b959a5787bc26492a0ceca44ddabccc

  • SHA256

    241eafe0509458d94b68bff75fd8ad2c8d13e67bdcafe579ada2f7736c11a163

  • SHA512

    c9898096e88690bdbbdc573f1318aac62785785ba27a81efae3ebb3c4e04891566b571479d4a242e5479df30b5aa92e9cdcccbbfc421239b06b4cb9b32f96c55

  • SSDEEP

    1536:s7ZppApdII+49101NGII+49101t+ZGtK1+ZGtKP:spWpRGOGaZGtKgZGtKP

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 (5039) 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\241eafe0509458d94b68bff75fd8ad2c8d13e67bdcafe579ada2f7736c11a163.exe
    "C:\Users\Admin\AppData\Local\Temp\241eafe0509458d94b68bff75fd8ad2c8d13e67bdcafe579ada2f7736c11a163.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:1996

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-3951986358-4006919840-1009690842-1000\desktop.ini.tmp

          Filesize

          64KB

          MD5

          4de0531bc4be24cd59663898d0869361

          SHA1

          979bea5520b05bc05b59410220620be03b2008ec

          SHA256

          94c0fc745f7a90483db79cc375cd77ef1862235ec258b734632bbf96348c2a59

          SHA512

          d1347d33a8c7068b9e0a29ae360c512c73764c6d5cf866929d04002662860841abca11a08826ad1adb25f35c21f212a5a417271995404310401aa659545c76ec

        • C:\e871de07eca81c0a47\2010_x86.log.html.tmp

          Filesize

          145KB

          MD5

          b8e2285d1c3119fa77079f23ac8414f3

          SHA1

          e81cd8155cdc8af8ae37f9337c396b8949a7ab2e

          SHA256

          84143f1426cd2dc4c2c8c4161722dc9b6f918318cb238d3a4952e491fc627aac

          SHA512

          0ce4290e6570a837bb20708e3e3ed1d943f01388c9e58f7512c6cfb8708cd3c9ce6cc94542b78448b8e0498e1a6dadb19fc29a0c25cad56012ee6b483bbcb222