marsstealer | 9fba2c6f51319bc7585cd88948dfe4198a73a95d460d20f7c4ce54f892f84256

Analysis

max time kernel
148s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2023 07:07

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General

Target

shellgpt4.exe
Size

4.0MB
MD5

c62f737ce988b95d667ccfebcfcab323
SHA1

d5a5f8aca605097e98163dd3163c9519fe2d5b7d
SHA256

9fba2c6f51319bc7585cd88948dfe4198a73a95d460d20f7c4ce54f892f84256
SHA512

d6fb67ffec3b2e1d0add413f715b6b27ae9c0c887f05a770e3e15984d11058796ebcdcc9840818f9484990ebfb75e8fef928d1f6812eef3e24cbbce70e86f977
SSDEEP

12288:fLplFN+msYJ2nCuWyEHx7YsvTZq7FUEpJBC:HC9WtZM

Score

10^/10

marsstealer default spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

www.moscow-post.ru/bark/wpadmin/admin.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:

shellgpt4.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	shellgpt4.exe

Executes dropped EXE 1 IoCs

Processes:

XN2FOK.exe

pid process

1804 XN2FOK.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

1736 1804 WerFault.exe XN2FOK.exe

pid	process
1804	XN2FOK.exe

pid	pid_target	process	target process
1736	1804	WerFault.exe	XN2FOK.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

shellgpt4.exe

description	pid	process	target process
PID 748 wrote to memory of 1804	748	shellgpt4.exe	XN2FOK.exe
PID 748 wrote to memory of 1804	748	shellgpt4.exe	XN2FOK.exe
PID 748 wrote to memory of 1804	748	shellgpt4.exe	XN2FOK.exe

C:\Users\Admin\AppData\Local\Temp\shellgpt4.exe
"C:\Users\Admin\AppData\Local\Temp\shellgpt4.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:748

C:\Users\Admin\AppData\Local\Temp\XN2FOK.exe
"C:\Users\Admin\AppData\Local\Temp\XN2FOK.exe"
2⤵
- Executes dropped EXE
PID:1804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1804 -s 1380
3⤵
- Program crash
PID:1736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 376 -p 1804 -ip 1804
1⤵
PID:1972

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

C:\Users\Admin\AppData\Local\Temp\XN2FOK.exe
Filesize
159KB

MD5
cb931b2b653c327a20844180e26675de

SHA1
3e9186e83b682a167d12acb556b544a029059d80

SHA256
d638138809368db6e11149bddef9b835063c26f4b7d657ef1f8da7aec2042d63

SHA512
9c68708ee543199b9d8ed809d69e4394fad5dfdcb324e70b9c2559985dffa3d487d0b8d98af647d871bce1ed47617b7e588f78fc2778641dd461e5dc7a442f32

Download Submit
memory/748-0-0x0000000000F50000-0x0000000000FF0000-memory.dmp

Filesize
640KB

Download
memory/748-1-0x0000000074640000-0x0000000074DF0000-memory.dmp

Filesize
7.7MB

Download
memory/748-2-0x0000000005A30000-0x0000000005A40000-memory.dmp

Filesize
64KB

Download
memory/748-13-0x0000000074640000-0x0000000074DF0000-memory.dmp

Filesize
7.7MB

Download
memory/1804-12-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1804-15-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download