MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4c36a7fde33b069aa436c820d1dae65fdf29c18badef68d9e010fe8f4f13435. 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: 10


Intelligence 10 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a4c36a7fde33b069aa436c820d1dae65fdf29c18badef68d9e010fe8f4f13435
SHA3-384 hash: e0e270a5970082d0cf504bcaf5465141b6106c6218bdab5d5fe35b85961c7663d0b73846c6f1cb2278abdc1ac87ab115
SHA1 hash: 58ae987ebc0dca1843b59ef64599cdde8c792ae6
MD5 hash: bc1268d92af4fa96a5ab483bf8c44a3c
humanhash: fish-tennis-mountain-london
File name:startup_793.bat
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:4'383'895 bytes
First seen:2025-12-09 00:15:04 UTC
Last seen:Never
File type:Batch (bat) bat
MIME type:text/plain
ssdeep 49152:cX96J9Ovx5MHLubdDvp/63jsM4jG92gzzFHoKllw/OxH4mqXx:Q
TLSH T1401633519EAC5F6F4BB8A66C307F0C0B13F08E84501594E99BE6DCDE929EF84071B62D
Magika crt
Reporter smica83
Tags:bat QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
99
Origin country :
HU HU
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
_a4c36a7fde33b069aa436c820d1dae65fdf29c18badef68d9e010fe8f4f13435.txt
Verdict:
No threats detected
Analysis date:
2025-12-09 00:24:38 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/d290b41d-f9cc-45fa-9f9b-bdc6ec34114b

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/43931/
Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69376a1fdb58e1a2c22ba49f
Tags:
metasploit backdoor shell sage
Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 base64 conhost evasive lolbin obfuscated packed powershell reconnaissance schtasks
Link:
https://www.filescan.io/uploads/69376a11ff25e40750d857a0/reports/de81dff4-9310-4e6f-879d-ea60594afcea/overview
Verdict:
Suspicious
Labled as:
Trojan/BAT.Obfus
Link:
https://www.hybrid-analysis.com/sample/a4c36a7fde33b069aa436c820d1dae65fdf29c18badef68d9e010fe8f4f13435
Verdict:
Clean
File Type:
ps1
First seen:
2025-12-09T20:29:00Z UTC
Last seen:
2025-12-09T20:33:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/a4c36a7fde33b069aa436c820d1dae65fdf29c18badef68d9e010fe8f4f13435/results?tab=lookup
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1829207
Signature
.NET source code contains potential unpacker
Bypasses PowerShell execution policy
Found large BAT file
Hides that the sample has been downloaded from the Internet (zone.identifier)
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Sets debug register (to hijack the execution of another thread)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Malicious Base64 Encoded PowerShell Keywords in Command Lines
Sigma detected: Potentially Suspicious PowerShell Child Processes
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Powerup Write Hijack DLL
Sigma detected: Suspicious PowerShell Parameter Substring
Suspicious powershell command line found
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Powershell decode and execute
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1829207 Sample: startup_793.bat Startdate: 09/12/2025 Architecture: WINDOWS Score: 100 47 shed.dual-low.part-0029.t-0009.t-msedge.net 2->47 49 shed.dual-low.part-0013.t-0009.t-msedge.net 2->49 51 5 other IPs or domains 2->51 55 Malicious sample detected (through community Yara rule) 2->55 57 Yara detected Powershell decode and execute 2->57 59 Yara detected Quasar RAT 2->59 61 9 other signatures 2->61 10 cmd.exe 1 2->10         started        signatures3 process4 process5 12 conhost.exe 10->12         started        15 conhost.exe 10->15         started        signatures6 69 Suspicious powershell command line found 12->69 17 powershell.exe 979 12->17         started        71 Bypasses PowerShell execution policy 15->71 process7 dnsIp8 45 range-toolbar.deu.at.playit.plus 69.9.185.17, 5435 VOXEL-DOT-NETUS United States 17->45 43 C:\Windows\startup_202.bat, ASCII 17->43 dropped 63 Uses schtasks.exe or at.exe to add and modify task schedules 17->63 65 Sets debug register (to hijack the execution of another thread) 17->65 67 Hides that the sample has been downloaded from the Internet (zone.identifier) 17->67 22 SIHClient.exe 8 17->22         started        25 schtasks.exe 1 17->25         started        27 schtasks.exe 1 17->27         started        29 32 other processes 17->29 file9 signatures10 process11 dnsIp12 53 part-0029.t-0009.t-msedge.net 13.107.213.57, 443, 49722 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 22->53 31 conhost.exe 25->31         started        33 conhost.exe 27->33         started        35 conhost.exe 29->35         started        37 conhost.exe 29->37         started        39 conhost.exe 29->39         started        41 29 other processes 29->41 process13
Score:
98%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/a4c36a7fde33b069aa436c820d1dae65fdf29c18badef68d9e010fe8f4f13435
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a4c36a7fde33b069aa436c820d1dae65fdf29c18badef68d9e010fe8f4f13435/
Verdict:
Clean
Link:
https://tip.neiki.dev/file/a4c36a7fde33b069aa436c820d1dae65fdf29c18badef68d9e010fe8f4f13435
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=utbwu766goygtksdnsba2hnomx67fhayxlppndm6aeh6r5hrgq2q._file
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar execution spyware trojan
Link:
https://tria.ge/reports/251209-aj39qa1pcx/
Behaviour
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Badlisted process makes network request
Command and Scripting Interpreter: PowerShell
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/a4c36a7fde33b069aa436c820d1dae65fdf29c18badef68d9e010fe8f4f13435

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/43931/

Comments