Malware Analysis Report

2024-10-19 07:06

Sample ID 231225-gzbmzacfbk
Target [Hentai JOI] MrsNuzuki Patreon 2023.exe
SHA256 71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378
Tags
marsstealer default spyware stealer
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

71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378

Threat Level: Known bad

The file [Hentai JOI] MrsNuzuki Patreon 2023.exe was found to be: Known bad.

Malicious Activity Summary

marsstealer default spyware stealer

Mars Stealer

Executes dropped EXE

Loads dropped DLL

Reads user/profile data of web browsers

Unsigned PE

Enumerates physical storage devices

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-25 06:14

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-25 06:14

Reported

2023-12-25 06:16

Platform

win7-20231215-en

Max time kernel

118s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\[Hentai JOI] MrsNuzuki Patreon 2023.exe"

Signatures

Mars Stealer

stealer marsstealer

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Adobe\.exe N/A

Reads user/profile data of web browsers

spyware stealer

Enumerates physical storage devices

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Roaming\Adobe\.exe

Processes

C:\Users\Admin\AppData\Local\Temp\[Hentai JOI] MrsNuzuki Patreon 2023.exe

"C:\Users\Admin\AppData\Local\Temp\[Hentai JOI] MrsNuzuki Patreon 2023.exe"

C:\Users\Admin\AppData\Roaming\Adobe\.exe

"C:\Users\Admin\AppData\Roaming\Adobe\.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2136 -s 720

Network

Country Destination Domain Proto
US 8.8.8.8:53 moscow-post.com udp
RU 185.71.67.60:80 moscow-post.com tcp
US 8.8.8.8:53 www.moscow-post.com udp
RU 185.71.67.60:80 www.moscow-post.com 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/2260-0-0x0000000000FA0000-0x0000000001016000-memory.dmp

memory/2260-1-0x00000000747D0000-0x0000000074EBE000-memory.dmp

memory/2260-2-0x0000000004AE0000-0x0000000004B20000-memory.dmp

C:\Users\Admin\AppData\Roaming\Adobe\.exe

MD5 ccbede8d2869535347316a479f0b8095
SHA1 1dd0e7574972260c77ca90638950d83c7b00d8f2
SHA256 afae663cab910a67e7fb519797ff385926b77ee59fa0e96e1853318146d2e179
SHA512 9a0de846ced51215948a16300aec8aeb7cf0ef5c0005a3cb661fc27e85b5d25b3b3278e7c91fbedc9d0a1ec686fdcd8ff07f35b39931a7c28c8b2139dabf4456

memory/2260-13-0x0000000004B60000-0x0000000004B9D000-memory.dmp

memory/2260-15-0x00000000747D0000-0x0000000074EBE000-memory.dmp

memory/2136-14-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2260-11-0x0000000004B60000-0x0000000004B9D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-25 06:14

Reported

2023-12-25 06:16

Platform

win10v2004-20231215-en

Max time kernel

1s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\[Hentai JOI] MrsNuzuki Patreon 2023.exe"

Signatures

Mars Stealer

stealer marsstealer

Enumerates physical storage devices

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Roaming\Microsoft\BYN8.exe

Processes

C:\Users\Admin\AppData\Local\Temp\[Hentai JOI] MrsNuzuki Patreon 2023.exe

"C:\Users\Admin\AppData\Local\Temp\[Hentai JOI] MrsNuzuki Patreon 2023.exe"

C:\Users\Admin\AppData\Roaming\Microsoft\BYN8.exe

"C:\Users\Admin\AppData\Roaming\Microsoft\BYN8.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2116 -ip 2116

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2116 -s 1376

Network

Country Destination Domain Proto
US 138.91.171.81:80 tcp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
GB 87.248.205.0:80 tcp
GB 87.248.205.0:80 tcp
US 8.8.8.8:53 32.134.221.88.in-addr.arpa udp
GB 96.16.110.41:443 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 20.231.121.79:80 tcp
US 20.3.187.198:443 tcp

Files

memory/2360-1-0x0000000074790000-0x0000000074F40000-memory.dmp

memory/2360-0-0x0000000000920000-0x0000000000996000-memory.dmp

memory/2360-2-0x0000000005440000-0x0000000005450000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\BYN8.exe

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/2116-12-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2360-13-0x0000000074790000-0x0000000074F40000-memory.dmp

memory/2116-15-0x0000000000400000-0x000000000043D000-memory.dmp