MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b4433f996643f1b9716e29e3f89b542d935ed4fbd7b18269e430d171e9e8200. 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: 13

Intelligence 13 IOCs YARA 8 File information Comments

SHA256 hash:	4b4433f996643f1b9716e29e3f89b542d935ed4fbd7b18269e430d171e9e8200
SHA3-384 hash:	24b0c6643fe9bf58d64d02d9c25aca943419e64b4fa35f768c3dcf9137ba0872475880051d2a39976c9df6cca92faf3c
SHA1 hash:	35e850a563005659c3f19f5d367372d7a7e96c78
MD5 hash:	3d7c5c23b3420e3c6382fdc67a273fe2
humanhash:	beer-romeo-queen-sierra
File name:	file
Download:	download sample
Signature	MarsStealer Create hunting rule
File size:	333'312 bytes
First seen:	2023-09-07 22:43:33 UTC
Last seen:	2023-09-07 23:45:29 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	badfd3002a7785754765042ffe6b2bf7 (2 x RedLineStealer, 1 x Smoke Loader, 1 x MarsStealer)
ssdeep	6144:SoO+nalpeX9Ts6dda1vkw6F84d1pTAMuqCqfMy:hSC9owdCmq4RAMzCKM
Threatray	238 similar samples on MalwareBazaar
TLSH	T163646C1362E17961E1274A718E2AC2E42A9EF8E14F5577EB334CAAEF1F701E1C572311
TrID	37.3% (.EXE) Win64 Executable (generic) (10523/12/4) 17.8% (.EXE) Win16 NE executable (generic) (5038/12/1) 16.0% (.EXE) Win32 Executable (generic) (4505/5/1) 7.3% (.ICL) Windows Icons Library (generic) (2059/9) 7.2% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):
dhash icon	002040c0c4620100 (1 x MarsStealer)
Reporter	andretavare5
Tags:	exe MarsStealer

andretavare5

Sample downloaded from http://williecampbell.top/calc2.exe

Intelligence

File Origin

# of uploads :

# of downloads :

280

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

file

Verdict:

Malicious activity

Analysis date:

2023-09-07 22:44:32 UTC

Tags:

stealc stealer

Link:

https://app.any.run/tasks/3a23a942-dc38-421d-b09c-2d232da6f319

Note:

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

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/447300/

Detection(s):

SecuriteInfo.com.Win32.DropperX-gen.18882.24053.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Changing a file

Creating a file in the %AppData% subdirectories

Creating a window

Running batch commands

Creating a process with a hidden window

Сreating synchronization primitives

DNS request

Sending an HTTP GET request

Creating a file

Reading critical registry keys

Stealing user critical data

Gathering data

Verdict:

Malicious

Labled as:

Malware

Link:

https://www.hybrid-analysis.com/sample/4b4433f996643f1b9716e29e3f89b542d935ed4fbd7b18269e430d171e9e8200

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:

Oski Stealer

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/36d3dc02-cec9-44cf-b2d9-4c89526a4020

Result

Threat name:

Stealc, Vidar

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1305848

Signature

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Detected unpacking (changes PE section rights)

Detected unpacking (overwrites its own PE header)

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

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Sample uses string decryption to hide its real strings

Self deletion via cmd or bat file

Snort IDS alert for network traffic

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

Tries to steal Crypto Currency Wallets

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

Yara detected Stealc

Yara detected Vidar stealer

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/4b4433f996643f1b9716e29e3f89b542d935ed4fbd7b18269e430d171e9e8200/

Threat name:

Win32.Trojan.Privateloader

Status:

Malicious

First seen:

2023-09-07 21:07:00 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

22 of 24 (91.67%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=jncdh6mwmq7rxfyw4kpd7cnvilmtl3kpxv5rqju6imgrohu6qiaa._file

Verdict:

malicious

MarsStealer

48ee7f000b4b170974bdff49f62062cd19d30c150ef6d5e51637fe9d8920546a

MarsStealer

5168d5d6b59a26403a898e2d652325da96692f58353fa0105ca90cbb536138a0

MarsStealer

6ee580c8d6b8e197a80fb8b72813005d1283b968bd6f63963fcedbe874fe57c2

MarsStealer

97768c478c5e2eceaf19c74c3e75b871d8c7028f3a83f6ff5ce74fd1aa6860c5

MarsStealer

97926b3548aa3eeffe39a696a2744e22c550d76ac967af8969d50f6526007391

MarsStealer

b61dbd2a617235d6b4178d90d126dc57e40e74751e2f39fc8a5d8acf3e53f1c1

MarsStealer

ba4bcbdb679b739a34ce15523d1daa5cc41245633de78523b98cf994c073c173

MarsStealer

e998bbead443cf538740faaf375c3ee98abb7f2d3c313e9af96b650e23f92ad0

MarsStealer

ed0d87028ca259fd20def7b2131b184049ef43c5507937d8a5a9faf40ca9f761

MarsStealer

+ 228 additional samples on MalwareBazaar

Result

Malware family:

stealc

Score:

10/10

Tags:

family:stealc botnet:8268873659707098636355379426 discovery spyware stealer

Link:

https://tria.ge/reports/230907-2nssbseh7y/

Behaviour

Checks processor information in registry

Delays execution with timeout.exe

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Program crash

Accesses cryptocurrency files/wallets, possible credential harvesting

Checks installed software on the system

Checks computer location settings

Deletes itself

Loads dropped DLL

Reads user/profile data of web browsers

Downloads MZ/PE file

Stealc

Malware Config

C2 Extraction:

http://charlesjones.top

Unpacked files

SH256 hash:

3b16e7380171ace72014d2c96da0f5e39e3a59b04292ae835810811c9b8993be

MD5 hash:

b680e0c51e9f88c1d01c74d5753c021d

SHA1 hash:

85c53fb73c0610cec81ce9a31c233e7cac911556

Link:

https://www.unpac.me/results/be094d0f-641a-4a0a-8ef6-62c55b296dba/

Parent samples :
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SH256 hash:

4b4433f996643f1b9716e29e3f89b542d935ed4fbd7b18269e430d171e9e8200

MD5 hash:

3d7c5c23b3420e3c6382fdc67a273fe2

SHA1 hash:

35e850a563005659c3f19f5d367372d7a7e96c78

Link:

https://www.unpac.me/results/be094d0f-641a-4a0a-8ef6-62c55b296dba/

Malware family:

Stealc

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/4b4433f99664/report/overview.html

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/4b4433f996643f1b9716e29e3f89b542d935ed4fbd7b18269e430d171e9e8200

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:	DebuggerException__ConsoleCtrl 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:	infostealer_win_stealc_standalone Create hunting rule
Description:	Find standalone Stealc sample based on decryption routine or characteristic strings
Reference:	https://blog.sekoia.io/stealc-a-copycat-of-vidar-and-raccoon-infostealers-gaining-in-popularity-part-1/

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

Rule name:	Windows_Trojan_Smokeloader_3687686f Create hunting rule
Author:	Elastic Security

Rule name:	win_stealc_w0 Create hunting rule
Author:	crep1x
Description:	Find standalone Stealc sample based on decryption routine or characteristic strings
Reference:	https://blog.sekoia.io/stealc-a-copycat-of-vidar-and-raccoon-infostealers-gaining-in-popularity-part-1/