Malware Analysis Report

2025-08-05 14:40

Sample ID 250703-f49vwstycv
Target fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81
SHA256 fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81
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

fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81

Threat Level: Known bad

The file fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81 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

win10v2004-20250610-en

Max time kernel

105s

Max time network

136s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81.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\fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81.exe

"C:\Users\Admin\AppData\Local\Temp\fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81.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/1376-0-0x0000000000400000-0x0000000000407000-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

101s

Max time network

105s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81.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\fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81.exe

"C:\Users\Admin\AppData\Local\Temp\fe1139a91deed08d26cef85acaeb6480cfafe2708a845f40cdc5fa42b6d92a81.exe"

Network

Files

memory/5564-0-0x0000000000400000-0x0000000000407000-memory.dmp