marsstealer | 71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378

Analysis

max time kernel
118s
max time network
123s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25-12-2023 06:14

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General

Target

[Hentai JOI] MrsNuzuki Patreon 2023.exe
Size

11.5MB
MD5

9386af6fd41ad96b318f63b35ba418c7
SHA1

68763a50793e358faf7d089ebd27febdd07e3b77
SHA256

71ea59cbedf3c80b6e47bcd746463de8d82b650e0666183a3bd47bf1b2633378
SHA512

9344b70e176d9a892f22c5d192a714c19ec2beb6c6d997e72cc2fd8c7103cfeaa670e6f2fd234834ad18647dfbe9b31e12b49156821abf8391236a62261434f8
SSDEEP

12288:ytaCEOf6hozmO1LhZU2Pn5zvWKr5zaVTxOWQxBH+QWLoRrW4LbMQbKjVa:trOi70kLej

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

2136 .exe
Loads dropped DLL 5 IoCs

Processes:

[Hentai JOI] MrsNuzuki Patreon 2023.exeWerFault.exe

pid process

2260 [Hentai JOI] MrsNuzuki Patreon 2023.exe
2260 [Hentai JOI] MrsNuzuki Patreon 2023.exe
2636 WerFault.exe
2636 WerFault.exe
2636 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

2636 2136 WerFault.exe .exe

pid	process
2136	.exe

pid	process
2260	[Hentai JOI] MrsNuzuki Patreon 2023.exe
2260	[Hentai JOI] MrsNuzuki Patreon 2023.exe
2636	WerFault.exe
2636	WerFault.exe
2636	WerFault.exe

pid	pid_target	process	target process
2636	2136	WerFault.exe	.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

[Hentai JOI] MrsNuzuki Patreon 2023.exe.exe

description	pid	process	target process
PID 2260 wrote to memory of 2136	2260	[Hentai JOI] MrsNuzuki Patreon 2023.exe	.exe
PID 2260 wrote to memory of 2136	2260	[Hentai JOI] MrsNuzuki Patreon 2023.exe	.exe
PID 2260 wrote to memory of 2136	2260	[Hentai JOI] MrsNuzuki Patreon 2023.exe	.exe
PID 2260 wrote to memory of 2136	2260	[Hentai JOI] MrsNuzuki Patreon 2023.exe	.exe
PID 2136 wrote to memory of 2636	2136	.exe	WerFault.exe
PID 2136 wrote to memory of 2636	2136	.exe	WerFault.exe
PID 2136 wrote to memory of 2636	2136	.exe	WerFault.exe
PID 2136 wrote to memory of 2636	2136	.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\[Hentai JOI] MrsNuzuki Patreon 2023.exe
"C:\Users\Admin\AppData\Local\Temp\[Hentai JOI] MrsNuzuki Patreon 2023.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2260

C:\Users\Admin\AppData\Roaming\Adobe\.exe
"C:\Users\Admin\AppData\Roaming\Adobe\.exe"
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2136

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2136 -s 720
3⤵
- Loads dropped DLL
- Program crash
PID:2636

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
ccbede8d2869535347316a479f0b8095

SHA1
1dd0e7574972260c77ca90638950d83c7b00d8f2

SHA256
afae663cab910a67e7fb519797ff385926b77ee59fa0e96e1853318146d2e179

SHA512
9a0de846ced51215948a16300aec8aeb7cf0ef5c0005a3cb661fc27e85b5d25b3b3278e7c91fbedc9d0a1ec686fdcd8ff07f35b39931a7c28c8b2139dabf4456

Download Submit
memory/2136-14-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/2260-0-0x0000000000FA0000-0x0000000001016000-memory.dmp

Filesize
472KB

Download
memory/2260-1-0x00000000747D0000-0x0000000074EBE000-memory.dmp

Filesize
6.9MB

Download
memory/2260-2-0x0000000004AE0000-0x0000000004B20000-memory.dmp

Filesize
256KB

Download
memory/2260-13-0x0000000004B60000-0x0000000004B9D000-memory.dmp

Filesize
244KB

Download
memory/2260-15-0x00000000747D0000-0x0000000074EBE000-memory.dmp

Filesize
6.9MB

Download
memory/2260-11-0x0000000004B60000-0x0000000004B9D000-memory.dmp

Filesize
244KB

Download