marsstealer | d4ff635739b78e4033042ef5df1df720b46a727643d8a3e8dc6df34bf179a40f

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
24-12-2023 01:09

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General

Target

c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503.exe
Size

465KB
MD5

1578590b1e0234b07316d604370a087b
SHA1

ef865b18e16d6a74e38d3aba0d09600d0d450e3e
SHA256

c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503
SHA512

4ab2b5847ca31f07dbdb9d7043d462f8556562f30b23827f8b75bc15b4c57e295d56cc93a71a9ab45468ffd985452c79cd89975d3acd13f1146097687f33b974
SSDEEP

12288:YOZQdNMfxzE94hzovW/0NiqjAQeaDVI9VyvSBwoYE6xPqd2cftuw2:YYZqrNiTqaBb

Score

10^/10

marsstealer default spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

Signatures

Mars Stealer
An infostealer written in C++ based on other infostealers.
stealer marsstealer
Executes dropped EXE 1 IoCs

Processes:

.exe

pid process

3068 .exe

pid	process
3068	.exe

Loads dropped DLL 5 IoCs

Processes:

c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503.exeWerFault.exe

pid	process
2256	c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503.exe
2256	c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503.exe
2888	WerFault.exe
2888	WerFault.exe
2888	WerFault.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

2888 3068 WerFault.exe .exe

pid	pid_target	process	target process
2888	3068	WerFault.exe	.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503.exe.exe

description	pid	process	target process
PID 2256 wrote to memory of 3068	2256	c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503.exe	.exe
PID 2256 wrote to memory of 3068	2256	c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503.exe	.exe
PID 2256 wrote to memory of 3068	2256	c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503.exe	.exe
PID 2256 wrote to memory of 3068	2256	c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503.exe	.exe
PID 3068 wrote to memory of 2888	3068	.exe	WerFault.exe
PID 3068 wrote to memory of 2888	3068	.exe	WerFault.exe
PID 3068 wrote to memory of 2888	3068	.exe	WerFault.exe
PID 3068 wrote to memory of 2888	3068	.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503.exe
"C:\Users\Admin\AppData\Local\Temp\c498dec6b5bae2d62448ffb450fa594f0c0e55c7424923d602386dbdb6c61503.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2256

C:\Users\Admin\AppData\Roaming\Adobe\.exe
"C:\Users\Admin\AppData\Roaming\Adobe\.exe"
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3068 -s 800
3⤵
- Loads dropped DLL
- Program crash
PID:2888

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

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\.exe
Filesize
159KB

MD5
b1d6d66282771bdaee20f0295991140a

SHA1
f65c534725a4aa947285ecbb2acf3f5083803152

SHA256
9697901177242e9a450aae820687ddbbd13196b5876ec77cdcb663cfbadb0053

SHA512
af0bd80c0fdb1c336268c1bcdb8b0a05a588a1ded511669f6974b10e19752bed5305fda870a9a1e61be30db14228194f84ec8da74e9836eec3506d0629fe0900

Download Submit
memory/2256-0-0x0000000000900000-0x0000000000978000-memory.dmp

Filesize
480KB

Download
memory/2256-1-0x0000000074170000-0x000000007485E000-memory.dmp

Filesize
6.9MB

Download
memory/2256-11-0x0000000004170000-0x00000000041AD000-memory.dmp

Filesize
244KB

Download
memory/2256-13-0x0000000004170000-0x00000000041AD000-memory.dmp

Filesize
244KB

Download
memory/2256-12-0x0000000074170000-0x000000007485E000-memory.dmp

Filesize
6.9MB

Download
memory/3068-14-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download