marsstealer | 9b60513eb7f309154820d6efe0399d9d0c819c5744ca911d56ed86d77ee9750e

Analysis

max time kernel
164s
max time network
199s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
27-12-2023 01:37

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General

Target

71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378.exe
Size

11.5MB
MD5

9386af6fd41ad96b318f63b35ba418c7
SHA1

68763a50793e358faf7d089ebd27febdd07e3b77
SHA256

71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378
SHA512

9344b70e176d9a892f22c5d192a714c19ec2beb6c6d997e72cc2fd8c7103cfeaa670e6f2fd234834ad18647dfbe9b31e12b49156821abf8391236a62261434f8
SSDEEP

12288:ytaCEOf6hozmO1LhZU2Pn5zvWKr5zaVTxOWQxBH+QWLoRrW4LbMQbKjVa:trOi70kLej

Score

10^/10

marsstealer default spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

moscow-post.com/log/loger.php

Signatures

Mars Stealer
An infostealer written in C++ based on other infostealers.
stealer marsstealer

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378.exe

Executes dropped EXE 1 IoCs

Processes:

YC.exe

pid process

3660 YC.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3428 3660 WerFault.exe YC.exe

pid	process
3660	YC.exe

pid	pid_target	process	target process
3428	3660	WerFault.exe	YC.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378.exe

description	pid	process	target process
PID 5036 wrote to memory of 3660	5036	71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378.exe	YC.exe
PID 5036 wrote to memory of 3660	5036	71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378.exe	YC.exe
PID 5036 wrote to memory of 3660	5036	71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378.exe	YC.exe

C:\Users\Admin\AppData\Local\Temp\71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378.exe
"C:\Users\Admin\AppData\Local\Temp\71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5036

C:\Users\Admin\AppData\Roaming\Adobe\YC.exe
"C:\Users\Admin\AppData\Roaming\Adobe\YC.exe"
2⤵
- Executes dropped EXE
PID:3660

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3660 -s 1396
3⤵
- Program crash
PID:3428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3660 -ip 3660
1⤵
PID:2924

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/3660-11-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/3660-15-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/5036-1-0x0000000074BB0000-0x0000000075360000-memory.dmp

Filesize
7.7MB

Download
memory/5036-0-0x0000000000490000-0x0000000000506000-memory.dmp

Filesize
472KB

Download
memory/5036-2-0x0000000004F10000-0x0000000004F20000-memory.dmp

Filesize
64KB

Download
memory/5036-13-0x0000000074BB0000-0x0000000075360000-memory.dmp

Filesize
7.7MB

Download