Malware Analysis Report

2025-08-05 14:40

Sample ID 250703-f45k6svlt8
Target 41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b
SHA256 41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b
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

41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b

Threat Level: Known bad

The file 41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b was found to be: Known bad.

Malicious Activity Summary

cosmu discovery worm

Cosmu

Cosmu family

Detects Cosmu payload

Unsigned PE

System Location Discovery: System Language Discovery

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-07-03 05:26

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-07-03 05:26

Reported

2025-07-03 05:29

Platform

win10v2004-20250502-en

Max time kernel

104s

Max time network

136s

Command Line

"C:\Users\Admin\AppData\Local\Temp\41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b.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\41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b.exe

"C:\Users\Admin\AppData\Local\Temp\41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.179.227:80 c.pki.goog tcp

Files

memory/388-0-0x0000000000400000-0x0000000000407000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-07-03 05:26

Reported

2025-07-03 05:29

Platform

win11-20250619-en

Max time kernel

103s

Max time network

104s

Command Line

"C:\Users\Admin\AppData\Local\Temp\41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b.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\41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b.exe

"C:\Users\Admin\AppData\Local\Temp\41cf37e220124ebdca7d144fab579a0855504d0cccc1e170ebbabb7c6cf0df4b.exe"

Network

Files

memory/4736-0-0x0000000000400000-0x0000000000407000-memory.dmp