MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c40a5d39729166eb21d73335bb5e1fd55388a28f3eb9d0de6a53a290acd7d643. 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 10 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c40a5d39729166eb21d73335bb5e1fd55388a28f3eb9d0de6a53a290acd7d643
SHA3-384 hash: 4bcbc3524cfd1a05e49a580a801bca7d442e0e9fef7ed136ed0c581faecc8933f934606bffb6ac3692e3c7cd1e081716
SHA1 hash: 689edc2255353177117af303411dc32bdd6667f0
MD5 hash: 742ec3653046ef43562757c982e18a66
humanhash: shade-three-magazine-uncle
File name:file
Download: download sample
Signature MarsStealer
Create hunting rule
File size:178'688 bytes
First seen:2023-10-24 23:54:39 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 04c00bdb81343624dee767a0038091eb (1 x Tofsee, 1 x MarsStealer, 1 x TeamBot)
ssdeep 3072:J6BNDCjPloJ6qTOLJyElY1iaYAb1SGl8abvF/G17vcnyVUIvr:kMtoJ6qTOLJyE7KSGyabFA70n
Threatray 3 similar samples on MalwareBazaar
TLSH T10104D02276E2C072E16789302974C1B51E7BBD322B75808F37680BBE5E617D09BB9353
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 e0ac94a4a4a4b4b2 (1 x MarsStealer)
Reporter andretavare5
Tags:exe MarsStealer


Avatar
andretavare5
Sample downloaded from http://jamesjordan.top/timeSync.exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
335
Origin country :
US US
Vendor Threat Intelligence
Malware family:
oski
Create hunting rule
ID:
1
File name:
file
Verdict:
Malicious activity
Analysis date:
2023-10-25 00:03:36 UTC
Tags:
stealc stealer oski
Link:
https://app.any.run/tasks/55c30cef-0d45-4ae9-8eac-c6c4a80b849d

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/456094/
Detection(s):
SecuriteInfo.com.Win32.BotX-gen.25459.4318.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Sending a custom TCP request
Gathering data
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
greyware packed
Link:
https://www.filescan.io/uploads/653859574678fc28dfc990a3/reports/b176033f-722c-4984-a8ef-2f85a9828b31/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/c40a5d39729166eb21d73335bb5e1fd55388a28f3eb9d0de6a53a290acd7d643
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/211eabda-5de3-4b74-88eb-a88603eb5fc5
Result
Threat name:
Stealc
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1331598
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
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)
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Yara detected Stealc
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c40a5d39729166eb21d73335bb5e1fd55388a28f3eb9d0de6a53a290acd7d643
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c40a5d39729166eb21d73335bb5e1fd55388a28f3eb9d0de6a53a290acd7d643/
Threat name:
Win32.Trojan.BotX
Create hunting rule
Status:
Malicious
First seen:
2023-10-24 23:55:05 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
10 of 24 (41.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yqff2olssftowioxgm23wxq72vjyriuph245bxtkkorjblgx2zbq._file
Verdict:
malicious
Similar samples:
5e839ab11a3cb5e8a054700533530ad29a4598cfbc645a300ba98824939d4ecc
MarsStealer
6ecc47099d00f265d6d2e39174916d2812d93842b5881b056c4448fc4bcf9454
MarsStealer
878b256c4e804c7a502d5c49c326964165c93f21e1649345eb77233b27d70631
MarsStealer
Result
Malware family:
stealc
Create hunting rule
Score:
  10/10
Tags:
family:stealc discovery stealer
Link:
https://tria.ge/reports/231024-3ye5nabg84/
Behaviour
Checks processor information in registry
Suspicious behavior: EnumeratesProcesses
Program crash
Checks installed software on the system
Stealc
Unpacked files
SH256 hash:
2a3050b769d5c98b851f7f64a109a8956d3423e3831c275da9861ab21343d703
MD5 hash:
b4fb7f92bf5fde3a2ad3f19359f2877e
SHA1 hash:
86a44d47cda0fc366df746a8fa2a6a1f45c3815f
Detections:
stealc
Create hunting rule
Link:
https://www.unpac.me/results/dc5624e0-2aed-48d7-8f3a-995b86286530/
Parent samples :
5e839ab11a3cb5e8a054700533530ad29a4598cfbc645a300ba98824939d4ecc
6ecc47099d00f265d6d2e39174916d2812d93842b5881b056c4448fc4bcf9454
878b256c4e804c7a502d5c49c326964165c93f21e1649345eb77233b27d70631
c40a5d39729166eb21d73335bb5e1fd55388a28f3eb9d0de6a53a290acd7d643
1c1062e65701fdea8fa0eca0884f974b8c9e6cfe70391dfc33fcbf5594b1ebf8
7e04c56866f825de5621cf8074ce8235b49e7cc2bd2410ac75bbc9d1da9a5b67
SH256 hash:
c40a5d39729166eb21d73335bb5e1fd55388a28f3eb9d0de6a53a290acd7d643
MD5 hash:
742ec3653046ef43562757c982e18a66
SHA1 hash:
689edc2255353177117af303411dc32bdd6667f0
Link:
https://www.unpac.me/results/dc5624e0-2aed-48d7-8f3a-995b86286530/
Malware family:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c40a5d397291/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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__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: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
Cape
Cape
https://www.capesandbox.com/analysis/456094/
  
URLhaus
https://urlhaus.abuse.ch/url/2724912/

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