marsstealer | 319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39

General

Target

7aa3c65496b968c3641b7d7db1849ad4715053d6.exe
Size

159KB
MD5

538cc587125f738ae81e2e4fe28c0084
SHA1

7aa3c65496b968c3641b7d7db1849ad4715053d6
SHA256

319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39
SHA512

770eafcaa7ede802b61d6483fad9a4eff6161867c5d7f78b4ee2dfd01002425b56c09c52dea495b3b43b80f6ecfb966dedf79a08e0316f018b1cde929524bf2b
SSDEEP

3072:UP2iydi+7Jtzet46rSIskyH39vIe3EZ8CbsZEE6tLJSp8Bb8EG:edIfzetJFyXRlCbeV6tH8EG

Score

10^/10

marsstealer default discovery spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

C2

couriercare.in/18/gate.php

Signatures

Mars Stealer
An infostealer written in C++ based on other infostealers.
stealer marsstealer
Downloads MZ/PE file

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:

7aa3c65496b968c3641b7d7db1849ad4715053d6.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe

Loads dropped DLL 2 IoCs

Processes:

7aa3c65496b968c3641b7d7db1849ad4715053d6.exe

pid process

2932 7aa3c65496b968c3641b7d7db1849ad4715053d6.exe
2932 7aa3c65496b968c3641b7d7db1849ad4715053d6.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
2932	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe
2932	7aa3c65496b968c3641b7d7db1849ad4715053d6.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:

7aa3c65496b968c3641b7d7db1849ad4715053d6.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

5092 timeout.exe

pid	process
5092	timeout.exe

Modifies registry class 5 IoCs

Processes:

7aa3c65496b968c3641b7d7db1849ad4715053d6.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000_Classes\Local Settings	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe
Key created	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe
Key created	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

7aa3c65496b968c3641b7d7db1849ad4715053d6.execmd.exe

description	pid	process	target process
PID 2932 wrote to memory of 3756	2932	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe	cmd.exe
PID 2932 wrote to memory of 3756	2932	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe	cmd.exe
PID 2932 wrote to memory of 3756	2932	7aa3c65496b968c3641b7d7db1849ad4715053d6.exe	cmd.exe
PID 3756 wrote to memory of 5092	3756	cmd.exe	timeout.exe
PID 3756 wrote to memory of 5092	3756	cmd.exe	timeout.exe
PID 3756 wrote to memory of 5092	3756	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\7aa3c65496b968c3641b7d7db1849ad4715053d6.exe
"C:\Users\Admin\AppData\Local\Temp\7aa3c65496b968c3641b7d7db1849ad4715053d6.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2932

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\7aa3c65496b968c3641b7d7db1849ad4715053d6.exe" & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:3756

C:\Windows\SysWOW64\timeout.exe
timeout /t 5
3⤵
- Delays execution with timeout.exe
PID:5092

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:2368

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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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/2932-0-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/2932-1-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/2932-67-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads