Malware Analysis Report

2024-10-19 07:06

Sample ID 231225-epmw5sfdh5
Target efe42e097392ba07bdbc1b30ed12f46f.exe
SHA256 9d15283240ff79899aeb0f2866c51b75d953e5c04a8069397734a3cb6aef87af
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

9d15283240ff79899aeb0f2866c51b75d953e5c04a8069397734a3cb6aef87af

Threat Level: Known bad

The file efe42e097392ba07bdbc1b30ed12f46f.exe was found to be: Known bad.

Malicious Activity Summary

spyware stealer marsstealer default

Mars Stealer

Loads dropped DLL

Executes dropped EXE

Reads user/profile data of web browsers

Checks computer location settings

Unsigned PE

Enumerates physical storage devices

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-25 04:07

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-25 04:07

Reported

2023-12-25 04:09

Platform

win7-20231129-en

Max time kernel

118s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\efe42e097392ba07bdbc1b30ed12f46f.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Low\0RTCU.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\Local\Temp\Low\0RTCU.exe

Processes

C:\Users\Admin\AppData\Local\Temp\efe42e097392ba07bdbc1b30ed12f46f.exe

"C:\Users\Admin\AppData\Local\Temp\efe42e097392ba07bdbc1b30ed12f46f.exe"

C:\Users\Admin\AppData\Local\Temp\Low\0RTCU.exe

"C:\Users\Admin\AppData\Local\Temp\Low\0RTCU.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2208 -s 564

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/2352-0-0x00000000009D0000-0x0000000000A44000-memory.dmp

memory/2352-1-0x0000000074C10000-0x00000000752FE000-memory.dmp

memory/2352-2-0x00000000041D0000-0x0000000004210000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Low\0RTCU.exe

MD5 202191816957a39fc2b84b6c85acfeae
SHA1 f80f8648760994d71a5851823dd07167f0d57717
SHA256 a7f7dbcd70ed67b1f8a85b4cd5c807c7813e024c0539705d84c2c7f66b978002
SHA512 44a7071ffac61a0bb27c8c9697a2d6a14216801f5405ebea17a20c988b65ae4c8b592ebb207a6f3610da010795942ee00510c5e37db76cbd5ca87cd4a7c2a0f4

memory/2208-14-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2352-13-0x0000000074C10000-0x00000000752FE000-memory.dmp

memory/2352-11-0x0000000004140000-0x000000000417D000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Low\0RTCU.exe

MD5 ccbede8d2869535347316a479f0b8095
SHA1 1dd0e7574972260c77ca90638950d83c7b00d8f2
SHA256 afae663cab910a67e7fb519797ff385926b77ee59fa0e96e1853318146d2e179
SHA512 9a0de846ced51215948a16300aec8aeb7cf0ef5c0005a3cb661fc27e85b5d25b3b3278e7c91fbedc9d0a1ec686fdcd8ff07f35b39931a7c28c8b2139dabf4456

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-25 04:07

Reported

2023-12-25 04:09

Platform

win10v2004-20231215-en

Max time kernel

145s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\efe42e097392ba07bdbc1b30ed12f46f.exe"

Signatures

Mars Stealer

stealer marsstealer

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\efe42e097392ba07bdbc1b30ed12f46f.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\USOShared\K8H01RJTIRT8WK.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:\ProgramData\USOShared\K8H01RJTIRT8WK.exe

Processes

C:\Users\Admin\AppData\Local\Temp\efe42e097392ba07bdbc1b30ed12f46f.exe

"C:\Users\Admin\AppData\Local\Temp\efe42e097392ba07bdbc1b30ed12f46f.exe"

C:\ProgramData\USOShared\K8H01RJTIRT8WK.exe

"C:\ProgramData\USOShared\K8H01RJTIRT8WK.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1136 -ip 1136

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1136 -s 1372

Network

Country Destination Domain Proto
US 8.8.8.8:53 18.53.126.40.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
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
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 60.67.71.185.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 81.171.91.138.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 32.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 88.16.208.104.in-addr.arpa udp

Files

memory/2804-1-0x0000000074AB0000-0x0000000075260000-memory.dmp

memory/2804-0-0x0000000000790000-0x0000000000804000-memory.dmp

memory/2804-2-0x00000000051B0000-0x00000000051C0000-memory.dmp

C:\ProgramData\USOShared\K8H01RJTIRT8WK.exe

MD5 ccbede8d2869535347316a479f0b8095
SHA1 1dd0e7574972260c77ca90638950d83c7b00d8f2
SHA256 afae663cab910a67e7fb519797ff385926b77ee59fa0e96e1853318146d2e179
SHA512 9a0de846ced51215948a16300aec8aeb7cf0ef5c0005a3cb661fc27e85b5d25b3b3278e7c91fbedc9d0a1ec686fdcd8ff07f35b39931a7c28c8b2139dabf4456

memory/1136-12-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2804-13-0x0000000074AB0000-0x0000000075260000-memory.dmp

memory/1136-15-0x0000000000400000-0x000000000043D000-memory.dmp