MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 91c0ae9ff459cca0a73db2720dbb18d622b29e9681794d6bf84b6ce74b783331. 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: 15


Intelligence 15 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 91c0ae9ff459cca0a73db2720dbb18d622b29e9681794d6bf84b6ce74b783331
SHA3-384 hash: c58a749559c512791937c55595c27580f081008643701cfac586fb4fbede74d99f135084c6834782ec0d45a9354d51ad
SHA1 hash: 798f155245371e7e310033fa5a800dea6ff06909
MD5 hash: ae1f930b59ad207cd0b6574f8168f467
humanhash: october-carpet-fish-arkansas
File name:file
Download: download sample
Signature MarsStealer
Create hunting rule
File size:262'144 bytes
First seen:2023-11-27 12:03:48 UTC
Last seen:2023-11-27 13:27:50 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 9bcd508567ec94e2b89a6c2619b9256e (2 x Smoke Loader, 1 x Stealc, 1 x MarsStealer)
ssdeep 3072:tJeZAW8mgKK6fAperkFznC+MQ2d09pwivKqG4hICu7RA6GtZHGh8rE:HeOmgSfCquzX/D9pwXEu57RA6MQG
TLSH T10C449E23A3E1A871E5274A35CE6AC2A8662FB9514F257BDB13545EFF0D703E2C672301
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 010501010d011121 (1 x MarsStealer)
Reporter andretavare5
Tags:exe MarsStealer


Avatar
andretavare5
Sample downloaded from http://5.42.64.35/timeSync.exe

Intelligence

File Origin
# of uploads :
9
# of downloads :
313
Origin country :
US US
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/460661/
Detection(s):
SecuriteInfo.com.Win32.RansomX-gen.27741.528.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
DNS request
Sending an HTTP GET request
Creating a file
Reading critical registry keys
Changing a file
Creating a file in the %AppData% subdirectories
Creating a window
Running batch commands
Creating a process with a hidden window
Launching a process
Launching the default Windows debugger (dwwin.exe)
Stealing user critical data
Gathering data
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
control greyware lolbin packed
Link:
https://www.filescan.io/uploads/656485b62efa450749a91116/reports/3fa7cbab-4b7e-4c76-8349-38820bf371db/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/91c0ae9ff459cca0a73db2720dbb18d622b29e9681794d6bf84b6ce74b783331
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/d8e1f644-7fbc-42b6-b349-4aad43cee471
Result
Threat name:
Stealc, Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1348529
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 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 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/91c0ae9ff459cca0a73db2720dbb18d622b29e9681794d6bf84b6ce74b783331
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/91c0ae9ff459cca0a73db2720dbb18d622b29e9681794d6bf84b6ce74b783331/
Threat name:
Win32.Trojan.Privateloader
Create hunting rule
Status:
Malicious
First seen:
2023-11-27 12:04:05 UTC
File Type:
PE (Exe)
Extracted files:
21
AV detection:
21 of 23 (91.30%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=shak5h7ulhgkbjz5wjza3oyy2yrlfhuwqf4u227yjnwoos3ygmyq._file
Verdict:
malicious
Result
Malware family:
stealc
Create hunting rule
Score:
  10/10
Tags:
family:stealc discovery spyware stealer
Link:
https://tria.ge/reports/231127-n8mvxsgd52/
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://janmorath.icu
Unpacked files
SH256 hash:
eb113ec2d0d1e74738acbe1524105cd04c261198e0bd4c1ea98c0aad850df9c5
MD5 hash:
0f4161cf94530956c46a27a2026ec746
SHA1 hash:
9066037362dadb7fac1af20d1447673351f295f1
Detections:
stealc
Create hunting rule
win_stealc_a0
Create hunting rule
win_stealc_bytecodes_oct_2023
Create hunting rule
Link:
https://www.unpac.me/results/2a323176-a84a-431f-8ceb-b0aadabf9bff/
Parent samples :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 hash:
91c0ae9ff459cca0a73db2720dbb18d622b29e9681794d6bf84b6ce74b783331
MD5 hash:
ae1f930b59ad207cd0b6574f8168f467
SHA1 hash:
798f155245371e7e310033fa5a800dea6ff06909
Link:
https://www.unpac.me/results/2a323176-a84a-431f-8ceb-b0aadabf9bff/
Malware family:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/91c0ae9ff459/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/91c0ae9ff459cca0a73db2720dbb18d622b29e9681794d6bf84b6ce74b783331

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: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: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/2735175/
Cape
Cape
https://www.capesandbox.com/analysis/460661/

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