marsstealer | 2036928122f63d2ce88ba94aa48f0e2e42af769d2731118e441b568fb7866182

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2023 01:21

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General

Target

911221ce521f77139ecfa2a277c277aaee6bff7094d9c5b31b893a4b104dea48.exe
Size

433KB
MD5

40cf5b7e5c505da78a7f66d2950effbf
SHA1

abf961c5b9fae57411a195a00b4c7093d2fe0bc4
SHA256

911221ce521f77139ecfa2a277c277aaee6bff7094d9c5b31b893a4b104dea48
SHA512

08cbfc073c2d0f63a9b2711a81dd30809cb87eb2310ffd5b2a582a1e9ca0ebd5956093e83453310cba25a403aa28bf7cfcb3725a017188d48e66cccccb190bc5
SSDEEP

12288:pyVG1u73Do/eGm5uRWlgfS7BCag7MJQIGhJNsx61V0wrY4FS9:IGS6WRN+JGxS

Score

10^/10

marsstealer default spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

www.moscow-post.com/wp-content/plugins/toocreate/tuzerfd.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:

911221ce521f77139ecfa2a277c277aaee6bff7094d9c5b31b893a4b104dea48.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	911221ce521f77139ecfa2a277c277aaee6bff7094d9c5b31b893a4b104dea48.exe

Executes dropped EXE 1 IoCs

Processes:

IOWU.exe

pid process

1480 IOWU.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

2744 1480 WerFault.exe IOWU.exe

pid	process
1480	IOWU.exe

pid	pid_target	process	target process
2744	1480	WerFault.exe	IOWU.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

911221ce521f77139ecfa2a277c277aaee6bff7094d9c5b31b893a4b104dea48.exe

description	pid	process	target process
PID 1172 wrote to memory of 1480	1172	911221ce521f77139ecfa2a277c277aaee6bff7094d9c5b31b893a4b104dea48.exe	IOWU.exe
PID 1172 wrote to memory of 1480	1172	911221ce521f77139ecfa2a277c277aaee6bff7094d9c5b31b893a4b104dea48.exe	IOWU.exe
PID 1172 wrote to memory of 1480	1172	911221ce521f77139ecfa2a277c277aaee6bff7094d9c5b31b893a4b104dea48.exe	IOWU.exe

C:\Users\Admin\AppData\Local\Temp\911221ce521f77139ecfa2a277c277aaee6bff7094d9c5b31b893a4b104dea48.exe
"C:\Users\Admin\AppData\Local\Temp\911221ce521f77139ecfa2a277c277aaee6bff7094d9c5b31b893a4b104dea48.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1172

C:\Users\Admin\AppData\Roaming\Microsoft\IOWU.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\IOWU.exe"
2⤵
- Executes dropped EXE
PID:1480

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 1412
3⤵
- Program crash
PID:2744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1480 -ip 1480
1⤵
PID:1900

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:\Users\Admin\AppData\Roaming\Microsoft\IOWU.exe
Filesize
159KB

MD5
53eb0bcc17ccf65660a7266e3287ebd6

SHA1
c4f2201da904be4882a104d6a291f70aebefb0a6

SHA256
7a391340b6677f74bcf896b5cc16a470543e2a384049df47949038df5e770df1

SHA512
2c6e157e34721fdc1fb17db73423afbcda9c9c45d61376a220c353a9af73c8aa7237525b4a15d55864762fc07868ab2f71c801a87d0a2cd60cae0fb49c4fbbaa

Download Submit
memory/1172-0-0x0000000000800000-0x0000000000872000-memory.dmp

Filesize
456KB

Download
memory/1172-1-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download
memory/1172-2-0x00000000052F0000-0x0000000005300000-memory.dmp

Filesize
64KB

Download
memory/1172-13-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download
memory/1480-10-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1480-15-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download