MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a63181dff0f68b98712247f51c8a6e7761f8a84261928c297b12f438272c1492. 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: 8


Intelligence 8 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a63181dff0f68b98712247f51c8a6e7761f8a84261928c297b12f438272c1492
SHA3-384 hash: 09145e1a3c8a30c840f8d8e570a9061b2bc0743e158aad8b9e7cd6e7b76c9f0f0baa93db05e3a7ceceff1544300feb28
SHA1 hash: adcfcf643b371e24d79353f4f88231170229949f
MD5 hash: 7e0b7c6c89827a608664bf468d850933
humanhash: tennis-jupiter-charlie-cola
File name:5.vbs
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:1'657'917 bytes
First seen:2025-01-30 08:54:39 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 24576:PLOiXTUVNhZXj4TARZ3zRdIwEtiQXNosn/eYwv2FpZHFLKOJFErpvGcZqF:bINzTLgrSK/fJ7HpeYcy
TLSH T1B875236C9B5C2EAD337E6633305F97058C958DE0C52853FB93E0B9E36EB6F0589A2441
Magika vba
Reporter JAMESWT_WT
Tags:156-253-250-62 Quasar QuasarRAT vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
106
Origin country :
IT IT
Vendor Threat Intelligence
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=679b405829ae628cf42b7cf2
Tags:
asyncrat quasar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm fingerprint monero obfuscated powershell warp
Link:
https://www.filescan.io/uploads/679b3e6da2886cdc5ac6afaa/reports/361ae7ae-6f75-4fff-bcf9-a73c2eb84011/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/a63181dff0f68b98712247f51c8a6e7761f8a84261928c297b12f438272c1492
Result
Verdict:
MALICIOUS
Details
Base64 Encoded Powershell Directives
Detected one or more base64 encoded Powershell directives.
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1602868
Signature
.NET source code contains a sample name check
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: PowerShell Base64 Encoded Invoke Keyword
Sigma detected: Suspicious PowerShell Parameter Substring
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Uses cmd line tools excessively to alter registry or file data
Uses dynamic DNS services
Uses known network protocols on non-standard ports
VBScript performs obfuscated calls to suspicious functions
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Wscript starts Powershell (via cmd or directly)
Yara detected AntiVM3
Yara detected Generic Downloader
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1602868 Sample: 5.vbs Startdate: 30/01/2025 Architecture: WINDOWS Score: 100 81 ducksro.DUCKDNS.ORG 2->81 83 0x0.st 2->83 105 Found malware configuration 2->105 107 Malicious sample detected (through community Yara rule) 2->107 109 Yara detected AntiVM3 2->109 113 15 other signatures 2->113 11 wscript.exe 2 2->11         started        15 cmd.exe 2->15         started        17 powershell.exe 27 2->17         started        19 taskkill.exe 1 2->19         started        signatures3 111 Uses dynamic DNS services 81->111 process4 file5 79 C:\Users\user\AppData\Local\Temp\c.bat, ASCII 11->79 dropped 123 VBScript performs obfuscated calls to suspicious functions 11->123 125 Wscript starts Powershell (via cmd or directly) 11->125 127 Windows Scripting host queries suspicious COM object (likely to drop second stage) 11->127 129 Suspicious execution chain found 11->129 21 cmd.exe 1 11->21         started        24 cmd.exe 15->24         started        26 conhost.exe 15->26         started        131 Loading BitLocker PowerShell Module 17->131 28 conhost.exe 17->28         started        30 WmiPrvSE.exe 17->30         started        32 conhost.exe 19->32         started        signatures6 process7 signatures8 115 Suspicious powershell command line found 21->115 117 Wscript starts Powershell (via cmd or directly) 21->117 119 Uses cmd line tools excessively to alter registry or file data 21->119 121 Bypasses PowerShell execution policy 21->121 34 cmd.exe 2 21->34         started        37 conhost.exe 21->37         started        39 powershell.exe 24->39         started        41 conhost.exe 24->41         started        43 reg.exe 24->43         started        45 powershell.exe 24->45         started        process9 signatures10 97 Suspicious powershell command line found 34->97 99 Wscript starts Powershell (via cmd or directly) 34->99 101 Uses cmd line tools excessively to alter registry or file data 34->101 47 powershell.exe 34->47         started        51 powershell.exe 14 35 34->51         started        54 conhost.exe 34->54         started        56 reg.exe 34->56         started        103 Loading BitLocker PowerShell Module 39->103 58 csc.exe 39->58         started        60 cmstp.exe 39->60         started        process11 dnsIp12 85 156.253.250.62, 49795, 49985, 5000 POWERLINE-AS-APPOWERLINEDATACENTERHK Seychelles 47->85 89 Found suspicious powershell code related to unpacking or dynamic code loading 47->89 91 Hides that the sample has been downloaded from the Internet (zone.identifier) 47->91 93 Installs a global keyboard hook 47->93 62 wermgr.exe 47->62         started        87 0x0.st 168.119.145.117, 443, 49704, 49874 HETZNER-ASDE Germany 51->87 75 C:\Users\user\AppData\...\isysbhiw.cmdline, Unicode 51->75 dropped 95 Loading BitLocker PowerShell Module 51->95 64 csc.exe 3 51->64         started        67 cmstp.exe 8 7 51->67         started        77 C:\Users\user\AppData\Local\...\4u53tnkt.dll, PE32 58->77 dropped 69 cvtres.exe 58->69         started        file13 signatures14 process15 file16 73 C:\Users\user\AppData\Local\...\isysbhiw.dll, PE32 64->73 dropped 71 cvtres.exe 1 64->71         started        process17
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/a63181dff0f68b98712247f51c8a6e7761f8a84261928c297b12f438272c1492
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a63181dff0f68b98712247f51c8a6e7761f8a84261928c297b12f438272c1492/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uyyydx7q62fzq4jci72rzctoo5q7rkccmgjiykl3cl2dqjzmcsja._file
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:2025 discovery execution persistence spyware trojan
Link:
https://tria.ge/reports/250130-kvf9fawpfx/
Behaviour
Kills process with taskkill
Suspicious behavior: CmdExeWriteProcessMemorySpam
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in System32 directory
Adds Run key to start application
Checks computer location settings
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
ducksro.DUCKDNS.ORG:5
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:Base64_Encoded_Powershell_Directives
Create hunting rule
Rule name:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
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.

Web download

QuasarRAT

Visual Basic Script (vbs) vbs a63181dff0f68b98712247f51c8a6e7761f8a84261928c297b12f438272c1492

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3420668/
  
Delivery method
Distributed via web download

Comments