Malware Analysis Report

2025-08-05 14:40

Sample ID 250703-f5f9zahq4y
Target b288ae63dda097fc636b9890c1fa04186e8831eff58b558f8c4c345dbd40a272
SHA256 b288ae63dda097fc636b9890c1fa04186e8831eff58b558f8c4c345dbd40a272
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 Overview

score
10/10

SHA256

b288ae63dda097fc636b9890c1fa04186e8831eff58b558f8c4c345dbd40a272

Threat Level: Known bad

The file b288ae63dda097fc636b9890c1fa04186e8831eff58b558f8c4c345dbd40a272 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 05:27

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-07-03 05:27

Reported

2025-07-03 05:29

Platform

win10v2004-20250619-en

Max time kernel

102s

Max time network

142s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b288ae63dda097fc636b9890c1fa04186e8831eff58b558f8c4c345dbd40a272.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\b288ae63dda097fc636b9890c1fa04186e8831eff58b558f8c4c345dbd40a272.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b288ae63dda097fc636b9890c1fa04186e8831eff58b558f8c4c345dbd40a272.exe

"C:\Users\Admin\AppData\Local\Temp\b288ae63dda097fc636b9890c1fa04186e8831eff58b558f8c4c345dbd40a272.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.179.227:80 c.pki.goog tcp

Files

memory/5032-0-0x0000000000400000-0x0000000000407000-memory.dmp