marsstealer | 6e2f1f2570bb49a0ff0e8b7e781f03d6e7f78798afe053ae373842ec42712702

Analysis

max time kernel
87s
max time network
95s
platform
windows11-21h2_x64
resource
win11-20240214-en
resource tags

arch:x64arch:x86image:win11-20240214-enlocale:en-usos:windows11-21h2-x64system
submitted
21-03-2024 12:18

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General

Target

Testing.exe
Size

159KB
MD5

1524f984753f60aa2b865ef86b79a58b
SHA1

07579a5c92e8cc92e3f391a5460d6de74310883b
SHA256

6e2f1f2570bb49a0ff0e8b7e781f03d6e7f78798afe053ae373842ec42712702
SHA512

8d8d34812091935ad4c90270d5df13c2a8e0f3f9a3a5752ba469a6d4972a36ea5696a087e47d65b1c13b36496e2fa87f0d99dd34119d5f3730ca9798db3855d2
SSDEEP

3072:U53/H9YArDiGiDSDCosstkZtqJSp8Bb8EG:W3/WuDi3stJ8EG

Score

10^/10

marsstealer default discovery spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

Signatures

Mars Stealer
An infostealer written in C++ based on other infostealers.
stealer marsstealer
Loads dropped DLL 2 IoCs

Processes:

Testing.exe

pid process

4432 Testing.exe
4432 Testing.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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4432	Testing.exe
4432	Testing.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Testing.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Testing.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	Testing.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4440 timeout.exe

pid	process
4440	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Testing.execmd.exe

description	pid	process	target process
PID 4432 wrote to memory of 4952	4432	Testing.exe	cmd.exe
PID 4432 wrote to memory of 4952	4432	Testing.exe	cmd.exe
PID 4432 wrote to memory of 4952	4432	Testing.exe	cmd.exe
PID 4952 wrote to memory of 4440	4952	cmd.exe	timeout.exe
PID 4952 wrote to memory of 4440	4952	cmd.exe	timeout.exe
PID 4952 wrote to memory of 4440	4952	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\Testing.exe
"C:\Users\Admin\AppData\Local\Temp\Testing.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:4432
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\Testing.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4952
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:4440

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\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
C:\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
memory/4432-0-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4432-1-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/4432-66-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download