MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 d856336054b054ee4b6aed66226e90dfca9a236e93012360b34001e75cf58693. 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: 15
| SHA256 hash: | d856336054b054ee4b6aed66226e90dfca9a236e93012360b34001e75cf58693 |
|---|---|
| SHA3-384 hash: | 549f332774e2fa63994dcea384f0002b8e4a1041d1f4a8b122bf2604a3d00b202b29969679dc85f284b1dccbcfb69903 |
| SHA1 hash: | 56fde32c8a689cfac8aea7212e5402f555002f97 |
| MD5 hash: | 915fcd5a462c38428f6f0306995f3730 |
| humanhash: | march-oven-social-oven |
| File name: | WindowsLogonService.bat |
| Download: | download sample |
| Signature | QuasarRAT |
| File size: | 1'418'394 bytes |
| First seen: | 2026-04-14 07:44:43 UTC |
| Last seen: | Never |
| File type: |  bat |
| MIME type: | text/x-msdos-batch |
| ssdeep | 12288:XHBcercT2rqqcCx74BplUQ50ZHabkg2f8M2MzXhhtobe1Q9Zd3gTSHHzV5d5Lsxb:3Ce/z4pFeHTh2KdduLfHzf/mxbdI7Izd |
| Threatray | 208 similar samples on MalwareBazaar |
| TLSH | T17065021589C42FB5CFEC5A1890FE171E63F04A8E552AB54EEB33BD4AAFE7504020B1D9 |
| Magika | batch |
| Reporter |  JAMESWT_WT |
| Tags: | bat github-com--demarcusnofatherington420-a11y QuasarRAT |
Intelligence
File Origin
# of uploads :
1
# of downloads :
95
Origin country :
ITVendor Threat Intelligence
Malware configuration found for:
BatchScript
Details
Malware family:
n/a
ID:
1
File name:
MaybeWorking.hta
Verdict:
Malicious activity
Analysis date:
2026-04-09 06:29:12 UTC
Tags:
github powershell
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
99.1%
Tags:
vmdetect emotet cobalt
Result
Verdict:
Malware
Maliciousness:
Behaviour
Launching cmd.exe command interpreter
Creating a file in the %AppData% subdirectories
Launching a process
Enabling the 'hidden' option for recently created files
Creating a file
Sending a custom TCP request
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
Creating a window
Searching for synchronization primitives
Connection attempt
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a system process
Gathering data
Verdict:
Malicious
Labled as:
Trojan.Generic
Verdict:
Malicious
File Type:
unix shell
First seen:
2026-04-02T23:42:00Z UTC
Last seen:
2026-04-16T04:51:00Z UTC
Hits:
~10
Detections:
HEUR:Trojan.BAT.Cobalt.gen Trojan.PowerShell.Cobalt.sb PDM:Trojan.Win32.Generic
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Verdict:
Malicious
Threat:
Family.DONUTLOADER
Threat name:
Script-BAT.Backdoor.Quasar
Status:
Malicious
First seen:
2026-04-03 07:49:16 UTC
File Type:
Text (Batch)
AV detection:
11 of 24 (45.83%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
donutloader
quasarrat
Similar samples:
+ 198 additional samples on MalwareBazaar
Result
Malware family:
quasar
Score:
10/10
Tags:
family:donutloader family:quasar defense_evasion execution loader persistence spyware trojan
Behaviour
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Views/modifies file attributes
Adds Run key to start application
Command and Scripting Interpreter: PowerShell
Detects DonutLoader
Family: DonutLoader
Family: Quasar RAT
Quasar payload
Malware family:
QuasarRAT
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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 |
|---|
| Rule name: | Disable_Defender |
|---|---|
| Author: | iam-py-test |
| Description: | Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen |
| Rule name: | Sus_CMD_Powershell_Usage |
|---|---|
| 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 |
|---|---|
| Author: | vietdx.mb |
| Rule name: | vmdetect |
|---|---|
| Author: | nex |
| Description: | Possibly employs anti-virtualization techniques |
| Rule name: | WIN_FileFix_Detection |
|---|---|
| Author: | dogsafetyforeverone |
| Description: | Detects FileFix social engineering technique that launches chained PowerShell and PHP commands from file explorer typed paths |
| Reference: | FileFix social engineering with PowerShell and PHP commands |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
Delivery method
Distributed via web download
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