MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 0303a89461c788270bb72b93dda3bede344d3d8da058d082f6527da6078f78f4. 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


QuasarRAT


Vendor detections: 11


Intelligence 11 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 0303a89461c788270bb72b93dda3bede344d3d8da058d082f6527da6078f78f4
SHA3-384 hash: 188bccd71597eca7a6fdbd6dd01790dd8ba242ec4ef2a7680fc27c526326fe12730a724cedc61604111933f4555564c9
SHA1 hash: 5b0fe95ae8483f181ded715dafab72b2389bff46
MD5 hash: fb85703b9404fddb0b141456063654ed
humanhash: double-bravo-india-lithium
File name:S5ZbO0lI.bat
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:846'697 bytes
First seen:2025-08-22 07:58:24 UTC
Last seen:Never
File type:Batch (bat) bat
MIME type:text/x-msdos-batch
ssdeep 24576:35C5asuN8YxvP1UkdQ18bxRiw0vT0Fgnel:iw86oub+wse
TLSH T1830523464F7E0B7A0D9C533A24344E292EF628D0A0D9F7F7F390B492511BB6E0A97974
Magika batch
Reporter smica83
Tags:bat QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
38
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
S5ZbO0lI.bat
Verdict:
Malicious activity
Analysis date:
2025-08-21 21:14:09 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/ee1f4360-cea3-46bb-947d-185574bfa45f

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/22891/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68a78c218fd55a79c529e232
Tags:
vmdetect xtreme shell sage
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
anti-vm
Link:
https://www.filescan.io/uploads/68a823327137d68458376fb7/reports/8400d107-a578-45f7-9941-f0e345b6c4c6/overview
Verdict:
Suspicious
Labled as:
Backdoor.U.Quasar
Link:
https://www.hybrid-analysis.com/sample/0303a89461c788270bb72b93dda3bede344d3d8da058d082f6527da6078f78f4
Verdict:
Clean
File Type:
unix shell
First seen:
2025-08-23T01:55:00Z UTC
Last seen:
2025-08-23T01:55:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/0303a89461c788270bb72b93dda3bede344d3d8da058d082f6527da6078f78f4/results?tab=lookup
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1762761
Signature
Bypasses PowerShell execution policy
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Obfuscated command line found
Powershell drops PE file
Sample uses string decryption to hide its real strings
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Suspicious PowerShell Parameter Substring
Suspicious command line found
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1762761 Sample: S5ZbO0lI.bat Startdate: 22/08/2025 Architecture: WINDOWS Score: 100 43 i.ibb.co 2->43 49 Found malware configuration 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 Yara detected Quasar RAT 2->53 55 6 other signatures 2->55 10 cmd.exe 1 2->10         started        13 MrEabrA.exe 2->13         started        signatures3 process4 signatures5 57 Suspicious powershell command line found 10->57 59 Obfuscated command line found 10->59 61 Uses schtasks.exe or at.exe to add and modify task schedules 10->61 15 conhost.exe 10->15         started        18 conhost.exe 10->18         started        20 conhost.exe 10->20         started        22 powershell.exe 7 13->22         started        process6 signatures7 77 Suspicious powershell command line found 15->77 79 Obfuscated command line found 15->79 24 powershell.exe 14 24 15->24         started        29 powershell.exe 33 18->29         started        81 Bypasses PowerShell execution policy 20->81 83 Suspicious command line found 22->83 31 cmd.exe 1 22->31         started        process8 dnsIp9 45 212.192.31.208, 443, 49692, 49693 ASBAXETNRU Russian Federation 24->45 47 i.ibb.co 207.174.26.219, 443, 49689, 49691 RCN-ASUS United States 24->47 41 C:\ProgramData\MrEabrA.exe, PE32+ 24->41 dropped 63 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 24->63 65 Hides that the sample has been downloaded from the Internet (zone.identifier) 24->65 67 Loading BitLocker PowerShell Module 24->67 33 cmd.exe 1 24->33         started        69 Obfuscated command line found 29->69 71 Suspicious command line found 29->71 73 Powershell drops PE file 29->73 75 Suspicious powershell command line found 31->75 35 powershell.exe 15 31->35         started        file10 signatures11 process12 process13 37 conhost.exe 33->37         started        39 schtasks.exe 1 33->39         started       
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/0303a89461c788270bb72b93dda3bede344d3d8da058d082f6527da6078f78f4
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/0303a89461c788270bb72b93dda3bede344d3d8da058d082f6527da6078f78f4/
Verdict:
Malicious
Threat:
Family.QUASAR
Link:
https://tip.neiki.dev/file/0303a89461c788270bb72b93dda3bede344d3d8da058d082f6527da6078f78f4
Threat name:
Script-BAT.Backdoor.Quasar
Create hunting rule
Status:
Malicious
First seen:
2025-08-21 21:23:00 UTC
File Type:
Text (Batch)
AV detection:
7 of 38 (18.42%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=amb2rfdby6ecoc5xfoj53i563y2e2pmnubmnbaxwkj62mb4ppd2a._file
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar defense_evasion execution persistence spyware trojan
Link:
https://tria.ge/reports/250822-jt6bhadq4x/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Modifies trusted root certificate store through registry
Quasar RAT
Quasar family
Quasar payload
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/0303a89461c788270bb72b93dda3bede344d3d8da058d082f6527da6078f78f4

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:botnet_plaintext_c2
Create hunting rule
Author:cip
Description:Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols.
Rule name:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:dependsonpythonailib
Create hunting rule
Author:Tim Brown
Description:Hunts for dependencies on Python AI libraries
Rule name:vmdetect
Create hunting rule
Author:nex
Description:Possibly employs anti-virtualization techniques

File information

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

QuasarRAT

HTML Application (hta) hta 60ab84dd3025433437cca0c39cfba49bee63e34cb208d605e1e561eea52cea38

QuasarRAT

Batch (bat) bat 0303a89461c788270bb72b93dda3bede344d3d8da058d082f6527da6078f78f4

(this sample)

  
Dropped by
MD5 ebc8a52d4249574a8f8df8e0cb892ca8
  
Dropped by
SHA256 60ab84dd3025433437cca0c39cfba49bee63e34cb208d605e1e561eea52cea38
Cape
Cape
https://www.capesandbox.com/analysis/22891/
  
URLhaus
https://urlhaus.abuse.ch/url/3609711/
  
Delivery method
Distributed via web download

Comments