marsstealer | 589305885aaab6c93b35fa797316b063a6f4ee3c86a5151a6cb19f2c875c830c

Analysis

max time kernel
123s
max time network
133s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
24-12-2023 03:10

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General

Target

76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c.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

Signatures

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

Processes:

EB.exe

pid process

2864 EB.exe

pid	process
2864	EB.exe

Loads dropped DLL 5 IoCs

Processes:

76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c.exeWerFault.exe

pid	process
2672	76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c.exe
2672	76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c.exe
1924	WerFault.exe
1924	WerFault.exe
1924	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

1924 2864 WerFault.exe EB.exe

pid	pid_target	process	target process
1924	2864	WerFault.exe	EB.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c.exeEB.exe

description	pid	process	target process
PID 2672 wrote to memory of 2864	2672	76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c.exe	EB.exe
PID 2672 wrote to memory of 2864	2672	76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c.exe	EB.exe
PID 2672 wrote to memory of 2864	2672	76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c.exe	EB.exe
PID 2672 wrote to memory of 2864	2672	76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c.exe	EB.exe
PID 2864 wrote to memory of 1924	2864	EB.exe	WerFault.exe
PID 2864 wrote to memory of 1924	2864	EB.exe	WerFault.exe
PID 2864 wrote to memory of 1924	2864	EB.exe	WerFault.exe
PID 2864 wrote to memory of 1924	2864	EB.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c.exe
"C:\Users\Admin\AppData\Local\Temp\76db9e74e9f0384c822b933a464cbc1f63b4c9a0a0b064774f09d8ee946d800c.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2672

C:\Users\Admin\AppData\Roaming\Identities\EB.exe
"C:\Users\Admin\AppData\Roaming\Identities\EB.exe"
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2864

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2864 -s 812
3⤵
- Loads dropped DLL
- Program crash
PID:1924

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

\Users\Admin\AppData\Roaming\Identities\EB.exe
Filesize
159KB

MD5
b1d6d66282771bdaee20f0295991140a

SHA1
f65c534725a4aa947285ecbb2acf3f5083803152

SHA256
9697901177242e9a450aae820687ddbbd13196b5876ec77cdcb663cfbadb0053

SHA512
af0bd80c0fdb1c336268c1bcdb8b0a05a588a1ded511669f6974b10e19752bed5305fda870a9a1e61be30db14228194f84ec8da74e9836eec3506d0629fe0900

Download Submit
memory/2672-0-0x0000000000160000-0x00000000001D2000-memory.dmp

Filesize
456KB

Download
memory/2672-1-0x0000000074B50000-0x000000007523E000-memory.dmp

Filesize
6.9MB

Download
memory/2672-6-0x00000000048C0000-0x00000000048FD000-memory.dmp

Filesize
244KB

Download
memory/2672-11-0x00000000048C0000-0x00000000048FD000-memory.dmp

Filesize
244KB

Download
memory/2672-14-0x0000000074B50000-0x000000007523E000-memory.dmp

Filesize
6.9MB

Download
memory/2864-13-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download