marsstealer | 76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
22-12-2023 16:32

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General

Target

as_driver.exe
Size

5.7MB
MD5

bd424a7fd1d0dbb18047473d25acf79d
SHA1

c663dcda2f85b9e43cb2160e8e6387657091e666
SHA256

76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c
SHA512

f7bd8928aa9b088a088897c14e6cbf87f6b36d024217fca360487ca8a3e8fe0c37080c3efe31f9502ba76aeffefdb5af66d51ca3ab4b986387bbccda53ee354f
SSDEEP

12288:OmOcdB+QGf79+kXqfDRjagi+Ug/NqTRxGrXnlJHmjEMnsL4pYZynND:nBcgAnRinrmb

Score

10^/10

marsstealer default spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

www.moscow-post.su/su/wp-content/lozzz.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:

as_driver.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	as_driver.exe

Executes dropped EXE 1 IoCs

Processes:

304YBDS.exe

pid process

776 304YBDS.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

4504 776 WerFault.exe 304YBDS.exe

pid	process
776	304YBDS.exe

pid	pid_target	process	target process
4504	776	WerFault.exe	304YBDS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

as_driver.exe

description	pid	process	target process
PID 1968 wrote to memory of 776	1968	as_driver.exe	304YBDS.exe
PID 1968 wrote to memory of 776	1968	as_driver.exe	304YBDS.exe
PID 1968 wrote to memory of 776	1968	as_driver.exe	304YBDS.exe

C:\Users\Admin\AppData\Local\Temp\as_driver.exe
"C:\Users\Admin\AppData\Local\Temp\as_driver.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1968

C:\ProgramData\Packages\304YBDS.exe
"C:\ProgramData\Packages\304YBDS.exe"
2⤵
- Executes dropped EXE
PID:776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 776 -s 1352
3⤵
- Program crash
PID:4504

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 776 -ip 776
1⤵
PID:3560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Packages\304YBDS.exe
Filesize
159KB

MD5
b1d6d66282771bdaee20f0295991140a

SHA1
f65c534725a4aa947285ecbb2acf3f5083803152

SHA256
9697901177242e9a450aae820687ddbbd13196b5876ec77cdcb663cfbadb0053

SHA512
af0bd80c0fdb1c336268c1bcdb8b0a05a588a1ded511669f6974b10e19752bed5305fda870a9a1e61be30db14228194f84ec8da74e9836eec3506d0629fe0900

Download Submit
memory/776-10-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/776-14-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1968-0-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/1968-1-0x00000000005B0000-0x0000000000622000-memory.dmp

Filesize
456KB

Download
memory/1968-12-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download