Malware Analysis Report

2025-08-05 14:40

Sample ID 250703-f5hg2ahq41
Target 21fdd1105eddff7aef7405e36861f1538be051b08961cee7fe89fa5866bed220
SHA256 21fdd1105eddff7aef7405e36861f1538be051b08961cee7fe89fa5866bed220
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

21fdd1105eddff7aef7405e36861f1538be051b08961cee7fe89fa5866bed220

Threat Level: Known bad

The file 21fdd1105eddff7aef7405e36861f1538be051b08961cee7fe89fa5866bed220 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

2025-07-03 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

103s

Max time network

137s

Command Line

"C:\Users\Admin\AppData\Local\Temp\21fdd1105eddff7aef7405e36861f1538be051b08961cee7fe89fa5866bed220.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\21fdd1105eddff7aef7405e36861f1538be051b08961cee7fe89fa5866bed220.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\21fdd1105eddff7aef7405e36861f1538be051b08961cee7fe89fa5866bed220.exe

"C:\Users\Admin\AppData\Local\Temp\21fdd1105eddff7aef7405e36861f1538be051b08961cee7fe89fa5866bed220.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 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/3524-0-0x0000000000400000-0x0000000000407000-memory.dmp