MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4587bf40060edf7f1978dbae81bdd1571217e9ca041281a18347382da9a5382e. 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: 7


Intelligence 7 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4587bf40060edf7f1978dbae81bdd1571217e9ca041281a18347382da9a5382e
SHA3-384 hash: 21ec29c03ee103fc5c4e9a35d97e7af40f93344b681473758ac554cc654065288d242d771e5701a22e8c38cb8acf52fb
SHA1 hash: e2222c2e40c77844802b50cf878aece187e04fdd
MD5 hash: 937852a829b28b4f75db1ec3c5136b11
humanhash: muppet-pennsylvania-bacon-snake
File name:file
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:1'797'216 bytes
First seen:2026-03-27 03:01:12 UTC
Last seen:2026-03-27 03:04:59 UTC
File type:Batch (bat) bat
MIME type:text/x-msdos-batch
ssdeep 24576:vbkJiK3NZ4kAP0O8yaRauUBDzY/lF/fK4X8JgdAvgydh7EP8yVJlOYM+:gF3fVAP0OSzgIbqohy0BlB
TLSH T1F185021589C83FF9DFAC5A1880FE161E63F05ACE5426758AEB33BD46AFE7504020B1D9
Magika batch
Reporter Bitsight
Tags:bat dropped-by-amadey fbf543 QuasarRAT


Avatar
Bitsight
url: http://192.177.26.196/files/8525074840/mdOjagm.bat

Intelligence

File Origin
# of uploads :
14
# of downloads :
12
Origin country :
US US
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.PowerShell.MulDrop.503.25585.19012.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69c62ff2aacb4c376b148740
Tags:
dropper emotet shell sage
Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching cmd.exe command interpreter
Creating a file in the %AppData% subdirectories
Launching a process
Creating a file
Enabling the 'hidden' option for recently created files
Connection attempt
Creating a process from a recently created file
Сreating synchronization primitives
Creating a file in the %temp% subdirectories
Creating a process with a hidden window
DNS request
Creating a window
Searching for synchronization primitives
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a system process
Verdict:
Malicious
Labled as:
PowerShell/TrojanDropper.Agent
Link:
https://www.hybrid-analysis.com/sample/4587bf40060edf7f1978dbae81bdd1571217e9ca041281a18347382da9a5382e
Result
Gathering data
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/4587bf40060edf7f1978dbae81bdd1571217e9ca041281a18347382da9a5382e
Gathering data
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=iwd36qagb3px6gly3oxidpork4jbp2okaqjidimdi44c3knfhaxa._file
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:donutloader family:quasar defense_evasion execution loader persistence ransomware spyware trojan
Link:
https://tria.ge/reports/260327-h6rhfaby7l/
Behaviour
Checks SCSI registry key(s)
Delays execution with timeout.exe
Enumerates system info in registry
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Uses Volume Shadow Copy WMI provider
Uses Volume Shadow Copy service COM API
Views/modifies file attributes
Hide Artifacts: Ignore Process Interrupts
Adds Run key to start application
Command and Scripting Interpreter: PowerShell
Contacts third-party web service commonly abused for C2
Enumerates connected drives
Indicator Removal: File Deletion
Boot or Logon Autostart Execution: Active Setup
Detects DonutLoader
DonutLoader
Donutloader family
Quasar RAT
Quasar family
Quasar payload
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/4587bf40060edf7f1978dbae81bdd1571217e9ca041281a18347382da9a5382e

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:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:telebot_framework
Create hunting rule
Author:vietdx.mb

File information

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

Web download

QuasarRAT

Batch (bat) bat 4587bf40060edf7f1978dbae81bdd1571217e9ca041281a18347382da9a5382e

(this sample)

  
Dropped by
Amadey
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3805956/

Comments