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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b998a20103013d9cc41aacad8cc2e6e84f6f29542f3b9bf78aa4802546fbe8da. 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: 9


Intelligence 9 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b998a20103013d9cc41aacad8cc2e6e84f6f29542f3b9bf78aa4802546fbe8da
SHA3-384 hash: 9f61749ad969e2f9b16ac460a7abc641cae8ca1e36eb665a996090a37c0f943ff43656b7135374fd5a3b877382b90a14
SHA1 hash: c2eb01794d0614fe350ee27e4cbf23a4ec02ae6c
MD5 hash: a06eb0b41f882f6f1795eacc8f312d80
humanhash: carolina-november-charlie-alpha
File name:startup_204.bat
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:4'391'343 bytes
First seen:2025-12-08 12:40:25 UTC
Last seen:Never
File type:Batch (bat) bat
MIME type:text/plain
ssdeep 49152:aDgetKH001qoaYtVjEA+ewX2Jt5638P9h5893Y0vqsQaIwZLbH:k
TLSH T1D31633229F794E7F4A7C32BC767F0E8E31DC8C90542299E893E1B897AB8CF1405A7515
Magika autoit
Reporter smica83
Tags:bat QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
92
Origin country :
HU HU
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
_b998a20103013d9cc41aacad8cc2e6e84f6f29542f3b9bf78aa4802546fbe8da.txt
Verdict:
No threats detected
Analysis date:
2025-12-08 12:42:40 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/7644a66a-7522-49e6-b147-e851d5bb3f28

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/42996/
Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6936c76ddb58e1a2c22b7eb9
Tags:
metasploit shell sage
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/6936c76bbc15eab491f71427/reports/f959c50c-bbe6-4fec-b731-49a5a53ec87c/overview
Verdict:
Suspicious
Labled as:
Trojan/BAT.Obfus
Link:
https://www.hybrid-analysis.com/sample/b998a20103013d9cc41aacad8cc2e6e84f6f29542f3b9bf78aa4802546fbe8da
Verdict:
Clean
File Type:
ps1
First seen:
2025-12-09T17:56:00Z UTC
Last seen:
2025-12-09T18:17:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/b998a20103013d9cc41aacad8cc2e6e84f6f29542f3b9bf78aa4802546fbe8da/results?tab=lookup
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1828763
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: 1828763 Sample: startup_204.bat Startdate: 08/12/2025 Architecture: WINDOWS Score: 100 49 shed.dual-low.part-0029.t-0009.t-msedge.net 2->49 51 shed.dual-low.part-0013.t-0009.t-msedge.net 2->51 53 5 other IPs or domains 2->53 57 Malicious sample detected (through community Yara rule) 2->57 59 Yara detected Powershell decode and execute 2->59 61 Yara detected Quasar RAT 2->61 63 9 other signatures 2->63 10 cmd.exe 1 2->10         started        signatures3 process4 process5 12 conhost.exe 10->12         started        15 conhost.exe 10->15         started        signatures6 71 Suspicious powershell command line found 12->71 17 powershell.exe 1002 12->17         started        73 Bypasses PowerShell execution policy 15->73 process7 dnsIp8 47 plus-moses.gl.at.ply.gg 147.185.221.211, 3091 SALSGIVERUS United States 17->47 45 C:\Windows\startup_191.bat, ASCII 17->45 dropped 65 Uses schtasks.exe or at.exe to add and modify task schedules 17->65 67 Sets debug register (to hijack the execution of another thread) 17->67 69 Hides that the sample has been downloaded from the Internet (zone.identifier) 17->69 22 schtasks.exe 1 17->22         started        24 schtasks.exe 1 17->24         started        26 schtasks.exe 1 17->26         started        28 33 other processes 17->28 file9 signatures10 process11 dnsIp12 31 conhost.exe 22->31         started        33 conhost.exe 24->33         started        35 conhost.exe 26->35         started        55 part-0029.t-0009.t-msedge.net 13.107.246.57, 443, 49725 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 28->55 37 conhost.exe 28->37         started        39 conhost.exe 28->39         started        41 conhost.exe 28->41         started        43 28 other processes 28->43 process13
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/b998a20103013d9cc41aacad8cc2e6e84f6f29542f3b9bf78aa4802546fbe8da
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b998a20103013d9cc41aacad8cc2e6e84f6f29542f3b9bf78aa4802546fbe8da/
Verdict:
Clean
Link:
https://tip.neiki.dev/file/b998a20103013d9cc41aacad8cc2e6e84f6f29542f3b9bf78aa4802546fbe8da
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xgmkeaidae6zzra2vswyzqxg5bhw6kkuf45zx54kusackrx35dna._file
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar execution spyware trojan
Link:
https://tria.ge/reports/251208-pxvxtsbp3v/
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/b998a20103013d9cc41aacad8cc2e6e84f6f29542f3b9bf78aa4802546fbe8da

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
Rule name:Warp
Create hunting rule
Author:Seth Hardy
Description:Warp
Rule name:WarpStrings
Create hunting rule
Author:Seth Hardy
Description:Warp Identifying Strings

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/42996/

Comments