Malware Analysis Report

2024-10-23 19:39

Sample ID 231219-2v3k4sehfk
Target utweb_installer.exe
SHA256 e482863957a81bf585e637311d51be7a4cb8819d432ce5dab3b089ceb46005b5
Tags
spyware stealer marsstealer default
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

e482863957a81bf585e637311d51be7a4cb8819d432ce5dab3b089ceb46005b5

Threat Level: Known bad

The file utweb_installer.exe was found to be: Known bad.

Malicious Activity Summary

spyware stealer marsstealer default

Mars Stealer

Reads user/profile data of web browsers

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-19 22:55

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-19 22:55

Reported

2023-12-19 22:57

Platform

win7-20231129-en

Max time kernel

121s

Max time network

121s

Command Line

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

Signatures

Processes

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1680 -s 920

Network

Country Destination Domain Proto
US 8.8.8.8:53 moscow-post.ru udp
RU 185.71.67.60:80 moscow-post.ru tcp
US 8.8.8.8:53 www.moscow-post.ru udp
RU 185.71.67.60:80 www.moscow-post.ru tcp
US 8.8.8.8:53 www.moscow-post.su udp
RU 185.71.67.60:80 www.moscow-post.su tcp

Files

memory/1680-0-0x0000000000400000-0x0000000000440000-memory.dmp

memory/1680-1-0x0000000000230000-0x0000000000270000-memory.dmp

memory/1680-2-0x0000000000230000-0x0000000000270000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-19 22:55

Reported

2023-12-19 22:57

Platform

win10v2004-20231215-en

Max time kernel

142s

Max time network

159s

Command Line

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

Signatures

Mars Stealer

stealer marsstealer

Reads user/profile data of web browsers

spyware stealer

Processes

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 1904 -ip 1904

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1904 -s 1380

Network

Country Destination Domain Proto
US 8.8.8.8:53 20.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 moscow-post.ru udp
RU 185.71.67.60:80 moscow-post.ru tcp
US 8.8.8.8:53 www.moscow-post.ru udp
RU 185.71.67.60:80 www.moscow-post.ru tcp
US 8.8.8.8:53 www.moscow-post.su udp
RU 185.71.67.60:80 www.moscow-post.su tcp
US 8.8.8.8:53 60.67.71.185.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 204.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 211.143.182.52.in-addr.arpa udp

Files

memory/1904-0-0x0000000000400000-0x0000000000440000-memory.dmp

memory/1904-2-0x0000000000400000-0x0000000000440000-memory.dmp