MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c7a39c464c5d25f0aa5cf1281d476269397122ee1fdf44ca7d3283080aa69ab3. 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: 18


Intelligence 18 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c7a39c464c5d25f0aa5cf1281d476269397122ee1fdf44ca7d3283080aa69ab3
SHA3-384 hash: 0f523bc4468c84254bb89744bfa011658257af09009c866bb31598cb60a515e9b4922c3387087beb0132a364d54450d5
SHA1 hash: 286b4b68c3864a5372087e389c90ed7029f6c490
MD5 hash: 0ce7687b9cd4c4acb89247fb9aef7c4c
humanhash: lion-low-skylark-failed
File name:file
Download: download sample
Signature MarsStealer
Create hunting rule
File size:277'032 bytes
First seen:2024-08-30 17:33:10 UTC
Last seen:2024-08-30 18:18:54 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 6144:+ASQL+HM36RIfBY1ra4Tz/ZPVxOnPxt1MTaBGKfEJmAQhEO:+cSHLQyBDnonPDOaBGCVLEO
TLSH T15544D00633C88371D94484B0C4E7A52943F6B6C7A7B3E7A63E4446D64E127E4ED8BB8D
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10523/12/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
Reporter Bitsight
Tags:exe MarsStealer


Avatar
Bitsight
url: http://147.45.44.104/lopsa/66d1ec0485e55_stealc_default.exe#kisotr

Intelligence

File Origin
# of uploads :
2
# of downloads :
405
Origin country :
US US
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
file
Verdict:
Malicious activity
Analysis date:
2024-08-30 17:35:50 UTC
Tags:
stealer stealc loader
Link:
https://app.any.run/tasks/972f0987-a94d-486a-b948-9a6f7512167a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.MalwareX-gen.23349.24815.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66d2028edfc4375710396919
Tags:
Encryption Static
Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a file
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Connection attempt to an infection source
Unauthorized injection to a system process
Sending an HTTP GET request to an infection source
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
net_reactor overlay packed packed
Link:
https://www.filescan.io/uploads/66d2028b78130acf33aa7817/reports/068335d1-0508-42ad-a636-ec4b069ae5fd/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/c7a39c464c5d25f0aa5cf1281d476269397122ee1fdf44ca7d3283080aa69ab3
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/8c6fdc71-a915-4a2e-ac80-81c172d1f0c4
Result
Threat name:
PureLog Stealer, Stealc
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1501944
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains very large array initializations
AI detected suspicious sample
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for sample
Suricata IDS alerts for network traffic
Writes to foreign memory regions
Yara detected Powershell download and execute
Yara detected PureLog Stealer
Yara detected Stealc
Behaviour
Behavior Graph:
Download SVG
Score:
83%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c7a39c464c5d25f0aa5cf1281d476269397122ee1fdf44ca7d3283080aa69ab3
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c7a39c464c5d25f0aa5cf1281d476269397122ee1fdf44ca7d3283080aa69ab3/
Threat name:
Win32.Trojan.Privateloader
Create hunting rule
Status:
Malicious
First seen:
2024-08-30 17:34:07 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=y6rzyrsmlus7bks46eub2r3cne4xcixod7pujst5gkbqqcvgtkzq._file
Verdict:
malicious
Result
Malware family:
stealc
Create hunting rule
Score:
  10/10
Tags:
family:stealc botnet:default discovery stealer
Link:
https://tria.ge/reports/240830-v5etgawcrg/
Behaviour
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Stealc
Malware Config
C2 Extraction:
http://193.176.190.41
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/03eecfe4-9562-441f-b3f7-914f170568c3
Unpacked files
SH256 hash:
c51d851e9737fe32fa95047afcfb030a6c006865536bd4894d5ea5d3b0aadbb8
MD5 hash:
b54977dc8d3e5df6dba2211efe221296
SHA1 hash:
1ecccf5e70971d7e26952e8a1f0d0483518f40ad
Detections:
stealc
Create hunting rule
Link:
https://www.unpac.me/results/aaf066b6-b102-47ea-846c-aff9ed7cee6b/
Parent samples :
12ba4ba5d28771a0ffdfc88f9542718b9d67caddfeedb68ddac6688e8cefd76e
21381b405bbb2d1ac38f1d908e0dc8a399fb2401d2ed1c1a300a2144626f9add
b264a2e3d5d065e2b8542a1e2d4a109c75347419b71b2232d6f71e473a0999fa
dbf55dd5c00f37ec49e1b661228adcc0a286b3eabb35d2f85fc34d82076107f6
c7a39c464c5d25f0aa5cf1281d476269397122ee1fdf44ca7d3283080aa69ab3
SH256 hash:
c7a39c464c5d25f0aa5cf1281d476269397122ee1fdf44ca7d3283080aa69ab3
MD5 hash:
0ce7687b9cd4c4acb89247fb9aef7c4c
SHA1 hash:
286b4b68c3864a5372087e389c90ed7029f6c490
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/aaf066b6-b102-47ea-846c-aff9ed7cee6b/
Malware family:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c7a39c464c5d/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/c7a39c464c5d25f0aa5cf1281d476269397122ee1fdf44ca7d3283080aa69ab3

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:DotNet_Reactor
Create hunting rule
Author:@bartblaze
Description:Identifies .NET Reactor, which offers .NET code protection such as obfuscation, encryption and so on.
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:PureCrypter
Create hunting rule
Author:@bartblaze
Description:Identifies PureCrypter, .NET loader and obfuscator.
Reference:https://malpedia.caad.fkie.fraunhofer.de/details/win.purecrypter
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Web download

MarsStealer

Executable exe c7a39c464c5d25f0aa5cf1281d476269397122ee1fdf44ca7d3283080aa69ab3

(this sample)

  
Dropped by
Privateloader
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3135945/

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
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high

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