MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5b1538d09a2374d64a845d748f8008438e53938bea792c05bdcf926dfd4503e1. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry

MarsStealer

Vendor detections: 16

Intelligence 16 IOCs YARA 12 File information Comments

SHA256 hash:	5b1538d09a2374d64a845d748f8008438e53938bea792c05bdcf926dfd4503e1
SHA3-384 hash:	10699335a1ba47a6d1b3d0fed8ee7e19be612d20fa5ce0023007e0dc951bed028e646f8f11735e3916b7b99c6eee793b
SHA1 hash:	4f92c678de5867fcec46dff19560390a7affbc7c
MD5 hash:	3c18dac89d980c0102252ad706634952
humanhash:	rugby-oklahoma-magazine-sweet
File name:	SecuriteInfo.com.Trojan.PWS.StealC.4.7916.17299
Download:	download sample
Signature	MarsStealer Create hunting rule
File size:	192'000 bytes
First seen:	2024-07-30 16:48:22 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	75f38a281962eafd8c14d2b02cfcdab6 (17 x Stealc, 1 x MarsStealer)
ssdeep	3072:2JlgTFj5qDao8KaxfE54HnnGSail+bOX8bUk3phFHJKa:2J65j5Ka2aOanGSabYSZhFpKa
TLSH	T1FB146D30F543403DE5A205FE6ADE5F6AE85D2D321324C0D763E26B8C26F11F5A875A2B
TrID	43.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 22.9% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 9.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 7.0% (.EXE) Win16 NE executable (generic) (5038/12/1) 6.2% (.EXE) Win32 Executable (generic) (4504/4/1)
Reporter	SecuriteInfoCom
Tags:	exe MarsStealer

Intelligence

File Origin

# of uploads :

# of downloads :

360

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

SecuriteInfo.com.Trojan.PWS.StealC.4.7916.17299

Verdict:

Malicious activity

Analysis date:

2024-07-30 17:09:11 UTC

Tags:

stealer stealc loader

Link:

https://app.any.run/tasks/d388ebc4-3b82-45db-a0bc-71382b1c3f19

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Verdict:

Malicious

Score:

99.1%

Link:

https://cyber-fortress.com/docs/result/index.php?id=66a91983c06bd32e596e7b72

Tags:

Infostealer Network Stealth

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

Connection attempt

Sending an HTTP GET request

Running batch commands

Creating a process with a hidden window

Launching a process

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

microsoft_visual_cc stealer

Link:

https://www.filescan.io/uploads/66a9198778d5c73fb1c95b5e/reports/0cbc3535-9b66-4367-a348-83a44ac6b86c/overview

Verdict:

Unknown

Link:

https://www.hybrid-analysis.com/sample/5b1538d09a2374d64a845d748f8008438e53938bea792c05bdcf926dfd4503e1

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Malware family:

Stealc

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/6fe81cbc-65f1-4af5-81e9-f30115632eda

Result

Threat name:

Stealc, Vidar

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1484872

Signature

AI detected suspicious sample

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Found evasive API chain (may stop execution after checking locale)

Found malware configuration

Found many strings related to Crypto-Wallets (likely being stolen)

Machine Learning detection for sample

Multi AV Scanner detection for submitted file

PE file has a writeable .text section

Sample uses string decryption to hide its real strings

Searches for specific processes (likely to inject)

Tries to harvest and steal Bitcoin Wallet information

Tries to harvest and steal browser information (history, passwords, etc)

Tries to harvest and steal ftp login credentials

Tries to steal Crypto Currency Wallets

Tries to steal Mail credentials (via file / registry access)

Yara detected Powershell download and execute

Yara detected Stealc

Yara detected Vidar stealer

Behaviour

Behavior Graph:

Download SVG

Score:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/5b1538d09a2374d64a845d748f8008438e53938bea792c05bdcf926dfd4503e1

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/5b1538d09a2374d64a845d748f8008438e53938bea792c05bdcf926dfd4503e1/

Threat name:

Win32.Trojan.Stealc

Status:

Malicious

First seen:

2024-07-30 15:14:33 UTC

File Type:

PE (Exe)

AV detection:

22 of 24 (91.67%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=lmktrue2en2nmsuelv2i7aaiiohfhe4l5j4sybn5z6jg37kfapqq._file

Verdict:

malicious

Result

Malware family:

stealc

Score:

10/10

Tags:

family:stealc botnet:valenciga credential_access discovery spyware stealer

Link:

https://tria.ge/reports/240730-vbnjhstaqa/

Behaviour

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

System Location Discovery: System Language Discovery

Accesses cryptocurrency files/wallets, possible credential harvesting

Checks installed software on the system

Loads dropped DLL

Reads data files stored by FTP clients

Reads user/profile data of web browsers

Unsecured Credentials: Credentials In Files

Downloads MZ/PE file

Credentials from Password Stores: Credentials from Web Browsers

Stealc

Malware Config

C2 Extraction:

http://91.225.219.163

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/fdf8a05e-b1e4-4fc4-979f-15d16f67a2cd

Unpacked files

SH256 hash:

5b1538d09a2374d64a845d748f8008438e53938bea792c05bdcf926dfd4503e1

MD5 hash:

3c18dac89d980c0102252ad706634952

SHA1 hash:

4f92c678de5867fcec46dff19560390a7affbc7c

Detections:

stealc

Link:

https://www.unpac.me/results/dc90a656-e700-41a6-9774-397804c55142/

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Malicious File

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/5b1538d09a2374d64a845d748f8008438e53938bea792c05bdcf926dfd4503e1

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerCheck__QueryInfo Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	detect_Mars_Stealer Create hunting rule
Author:	@malgamy12
Description:	detect_Mars_Stealer

Rule name:	maldoc_find_kernel32_base_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	malware_Stealc_str Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	Stealc infostealer

Rule name:	Stealc_unpacked_PulseIntel Create hunting rule
Author:	PulseIntel
Description:	Stealc Payload

Rule name:	Vidar_unpacked_PulseIntel Create hunting rule
Author:	PulseIntel
Description:	Vidar Payload

Rule name:	Windows_Generic_Threat_2bba6bae Create hunting rule
Author:	Elastic Security

Rule name:	Windows_Trojan_Stealc_5d3f297c Create hunting rule
Author:	Elastic Security

Rule name:	Windows_Trojan_Stealc_b8ab9ab5 Create hunting rule
Author:	Elastic Security

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

MarsStealer

exe 5b1538d09a2374d64a845d748f8008438e53938bea792c05bdcf926dfd4503e1

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/3079213/

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/3078669/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high

Reviews

ID	Capabilities	Evidence
WIN32_PROCESS_API	Can Create Process and Threads	KERNEL32.dll::OpenProcess
WIN_BASE_API	Uses Win Base API	KERNEL32.dll::TerminateProcess KERNEL32.dll::LoadLibraryW

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