Malware Analysis Report

2025-06-16 06:24

Sample ID 250605-j5h1cavjy8
Target bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f
SHA256 bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f
Tags
cosmu discovery worm
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V16

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f

Threat Level: Known bad

The file bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f was found to be: Known bad.

Malicious Activity Summary

cosmu discovery worm

Cosmu

Cosmu family

Detects Cosmu payload

System Location Discovery: System Language Discovery

Unsigned PE

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-06-05 08:15

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2025-06-05 08:15

Reported

2025-06-05 08:17

Platform

win10v2004-20250502-en

Max time kernel

104s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f.exe"

Signatures

Cosmu

worm cosmu

Cosmu family

cosmu

Detects Cosmu payload

Description Indicator Process Target
N/A N/A N/A N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f.exe

"C:\Users\Admin\AppData\Local\Temp\bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 c.pki.goog udp
NL 142.250.27.94:80 c.pki.goog tcp

Files

memory/5104-0-0x0000000000400000-0x0000000000407000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-06-05 08:15

Reported

2025-06-05 08:17

Platform

win11-20250502-en

Max time kernel

101s

Max time network

103s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f.exe"

Signatures

Cosmu

worm cosmu

Cosmu family

cosmu

Detects Cosmu payload

Description Indicator Process Target
N/A N/A N/A N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f.exe

"C:\Users\Admin\AppData\Local\Temp\bf1065b3216974bab0ec64c4fe206b7251cafd7d17279a4a041a7ad12b99d76f.exe"

Network

Files

memory/3460-0-0x0000000000400000-0x0000000000407000-memory.dmp