MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 21bfe00cf555ca16cef23fc0af6abd2b2f243453c047636b58ba45876c325cd3. 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: 14


Intelligence 14 IOCs YARA 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 21bfe00cf555ca16cef23fc0af6abd2b2f243453c047636b58ba45876c325cd3
SHA3-384 hash: 140a73a37bbbf88f904828acdd5b18a115ea4bffdb5fbffcd998b86557ba91f25c1d5e0bce3444908d5a122e71d85cd3
SHA1 hash: 5023a76e6cbe093bf712bee17418b8cc298f9376
MD5 hash: 1439c4910518fbd48fb0462cf56ae3d1
humanhash: autumn-mockingbird-twenty-washington
File name:file
Download: download sample
Signature MarsStealer
Create hunting rule
File size:263'680 bytes
First seen:2023-11-07 09:46:43 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 326ea291fa51c414a4c1a5d2ab64719d (4 x Stealc, 2 x Tofsee, 1 x Smoke Loader)
ssdeep 6144:VL5RbxDj0VCaiAJGrQW/8dfkFLYSrS3D:VbxDj0VCaeN/8cy
TLSH T10B444C1353E17CA5F6265A328E2EC6E4375EF9918F1537DB2258AA2F09B01F1C273712
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 00204a4322300c00 (1 x MarsStealer)
Reporter andretavare5
Tags:exe MarsStealer


Avatar
andretavare5
Sample downloaded from http://5.252.21.48/putty.exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
357
Origin country :
US US
Vendor Threat Intelligence
Detection(s):
Win.Dropper.Tofsee-10013797-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Connecting to a non-recommended domain
Sending an HTTP GET request
Creating a file
Reading critical registry keys
Sending a custom TCP request
Changing a file
Creating a file in the %AppData% subdirectories
Creating a window
Launching the default Windows debugger (dwwin.exe)
Stealing user critical data
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control greyware lolbin packed xpack
Link:
https://www.filescan.io/uploads/654a0796b50c9557591f238d/reports/19350f0d-4ed7-4d29-894e-14687471aa65/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/21bfe00cf555ca16cef23fc0af6abd2b2f243453c047636b58ba45876c325cd3
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/2138a7ae-11c0-4949-987f-cd8478a8dea0
Result
Threat name:
Stealc, Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1338116
Signature
Antivirus / Scanner detection for submitted sample
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 evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
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 domain / URL
Multi AV Scanner detection for submitted file
Sample uses string decryption to hide its real strings
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
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/21bfe00cf555ca16cef23fc0af6abd2b2f243453c047636b58ba45876c325cd3
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/21bfe00cf555ca16cef23fc0af6abd2b2f243453c047636b58ba45876c325cd3/
Threat name:
Win32.Trojan.Privateloader
Create hunting rule
Status:
Malicious
First seen:
2023-11-07 09:01:05 UTC
File Type:
PE (Exe)
Extracted files:
48
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=eg76adhvkxfbntxsh7ak62v5fmxsinctybdwg22yxjcyo3bsltjq._file
Verdict:
malicious
Result
Malware family:
stealc
Create hunting rule
Score:
  10/10
Tags:
family:stealc discovery spyware stealer
Link:
https://tria.ge/reports/231107-lr7gwsdh4w/
Behaviour
Checks processor information in registry
Suspicious behavior: EnumeratesProcesses
Program crash
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Stealc
Malware Config
C2 Extraction:
http://91.215.85.189
Unpacked files
SH256 hash:
7e29d1a22cf32c8fb59b6a9f6c0f8121d26038578df2a8f04fa7fe7cee7c9367
MD5 hash:
466b6376d5473a587c5f6b14eddf7a51
SHA1 hash:
256964ca5654f26e768690366d615d03277c826c
Detections:
stealc
Create hunting rule
Link:
https://www.unpac.me/results/10317bf5-5f79-4a3b-8930-620fda99bcba/
Parent samples :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 hash:
21bfe00cf555ca16cef23fc0af6abd2b2f243453c047636b58ba45876c325cd3
MD5 hash:
1439c4910518fbd48fb0462cf56ae3d1
SHA1 hash:
5023a76e6cbe093bf712bee17418b8cc298f9376
Link:
https://www.unpac.me/results/10317bf5-5f79-4a3b-8930-620fda99bcba/
Malware family:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/21bfe00cf555/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/21bfe00cf555ca16cef23fc0af6abd2b2f243453c047636b58ba45876c325cd3

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:DebuggerException__SetConsoleCtrl
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:Trojan_W32_Gh0stMiancha_1_0_0
Create hunting rule
Rule name:Windows_Trojan_Smokeloader_3687686f
Create hunting rule
Author:Elastic Security
Rule name:Windows_Trojan_Smokeloader_ea14b2a5
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/
Rule name:yarahub_win_stealc_bytecodes_oct_2023
Create hunting rule
Author:Matthew @ Embee_Research

File information

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

  
Dropped by
PrivateLoader
  
Delivery method
Distributed via drive-by
  
URLhaus
https://urlhaus.abuse.ch/url/2728133/

Comments