MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 47ff081bdf4d8189b5502692f0899cb4e9f7495a033555f913dda52da9a168dd. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 47ff081bdf4d8189b5502692f0899cb4e9f7495a033555f913dda52da9a168dd
SHA3-384 hash: 0a67a1861e26a7608f1ed25d739d5953ef9b1f0555c042899dd601b7d840a60cd0818a31ef53b3c79b7e1da1772c455f
SHA1 hash: a08a7c92da8b9c1f6d05399a347e6769d40141fc
MD5 hash: d7c2c222aa07ab435c6d2b0ac018c705
humanhash: delaware-ack-nebraska-xray
File name:BootstrapperNew.bat
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:322'687 bytes
First seen:2026-02-04 11:40:12 UTC
Last seen:Never
File type:Batch (bat) bat
MIME type:text/x-msdos-batch
ssdeep 6144:YZ7PGBYbO7I7CD1VfuMquX2b5vW5hTciDomtaTnfYUa4lz:YZQKYNu99uhDMmmwmz
TLSH T1D464E0387B80EC00167EF0626699DD373DDACBA3DB2711E791184E64187C787A788DDA
Magika batch
Reporter smica83
Tags:bat QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
72
Origin country :
HU HU
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
BootstrapperNew.bat
Verdict:
Malicious activity
Analysis date:
2026-02-04 11:41:37 UTC
Tags:
auto-sch auto-startup auto-reg api-base64 crypto-regex amsi-bypass
Link:
https://app.any.run/tasks/a2203d84-2c2a-4392-b934-4fd5ebff7b6f

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/51669/
Detection(s):
SecuriteInfo.com.Generic-EXE.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.30450.JsHeur.ExeObj.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.PUA.Base64EXE-2.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=698330266b1af47db72cc11d
Tags:
vmdetect
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm anti-vm base64 certutil evasive findstr lolbin obfuscated obfuscated
Link:
https://www.filescan.io/uploads/698330222ffccda09767be1d/reports/0fff2006-102e-461d-922c-f697341302b9/overview
Verdict:
Suspicious
Link:
https://www.hybrid-analysis.com/sample/47ff081bdf4d8189b5502692f0899cb4e9f7495a033555f913dda52da9a168dd
Verdict:
Malicious
File Type:
unix shell
First seen:
2026-02-01T09:56:00Z UTC
Last seen:
2026-02-05T01:34:00Z UTC
Hits:
~10
Detections:
Trojan.BAT.Agent.sb PDM:Trojan.Win32.Generic HEUR:Trojan.BAT.Agent.gen
Link:
https://opentip.kaspersky.com/47ff081bdf4d8189b5502692f0899cb4e9f7495a033555f913dda52da9a168dd/results?tab=lookup
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1863212
Signature
.NET source code contains potential unpacker
Contains functionality to disable the Task Manager (.Net Source)
Creates / moves files in alternative data streams (ADS)
Creates a thread in another existing process (thread injection)
Creates autostart registry keys with suspicious names
Drops VBS files to the startup folder
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Hooks files or directories query functions (used to hide files and directories)
Hooks processes query functions (used to hide processes)
Hooks registry keys query functions (used to hide registry keys)
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Modifies the context of a thread in another process (thread injection)
Modifies the export address table of user mode modules (user mode EAT hooks)
Modifies the import address table of user mode modules (user mode IAT hooks)
Modifies the prolog of user mode functions (user mode inline hooks)
Powershell is started from unusual location (likely to bypass HIPS)
Reads the Security eventlog
Reads the System eventlog
Renames powershell.exe to bypass HIPS
Sample uses string decryption to hide its real strings
Sets debug register (to hijack the execution of another thread)
Sigma detected: Drops script at startup location
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Rare Remote Thread Creation By Uncommon Source Image
Sigma detected: Register Wscript In Run Key
Sigma detected: Schtasks Creation Or Modification With SYSTEM Privileges
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Unusual module load detection (module proxying)
Uses cmd line tools excessively to alter registry or file data
Uses schtasks.exe or at.exe to add and modify task schedules
Uses WMIC command to query system information (often done to detect virtual machines)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript called in batch mode (surpress errors)
Yara detected AntiVM3
Yara detected EXE embedded in BAT file
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1863212 Sample: BootstrapperNew.bat Startdate: 04/02/2026 Architecture: WINDOWS Score: 100 74 shed.dual-low.part-0012.t-0009.t-msedge.net 2->74 76 part-0012.t-0009.t-msedge.net 2->76 78 3 other IPs or domains 2->78 100 Sigma detected: Register Wscript In Run Key 2->100 102 Found malware configuration 2->102 104 Malicious sample detected (through community Yara rule) 2->104 106 18 other signatures 2->106 9 cmd.exe 2 2->9         started        13 wscript.exe 2->13         started        signatures3 process4 file5 68 C:\Users\user\AppData\...\$77-cartfein.exe, PE32+ 9->68 dropped 108 Uses cmd line tools excessively to alter registry or file data 9->108 110 Renames powershell.exe to bypass HIPS 9->110 112 Unusual module load detection (module proxying) 9->112 114 Uses WMIC command to query system information (often done to detect virtual machines) 9->114 15 $77-cartfein.exe 21 21 9->15         started        20 cmd.exe 1 9->20         started        22 cmd.exe 1 9->22         started        26 34 other processes 9->26 116 Windows Scripting host queries suspicious COM object (likely to drop second stage) 13->116 24 cmd.exe 13->24         started        signatures6 process7 dnsIp8 80 93.123.109.129, 4782, 49704, 49706 SARNICA-ASBG Bulgaria 15->80 82 files.catbox.moe 108.181.20.35, 443, 49697, 49701 ASN852CA Canada 15->82 60 C:\Users\user\AppData\Roaming\...\$77.vbs, ASCII 15->60 dropped 62 C:\Program Files\...\$77files.vbs, ASCII 15->62 dropped 64 C:\Program Files\...\$77files.bat, DOS 15->64 dropped 84 Drops VBS files to the startup folder 15->84 86 Creates autostart registry keys with suspicious names 15->86 88 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 15->88 98 8 other signatures 15->98 28 cmd.exe 15->28         started        32 cmd.exe 15->32         started        34 schtasks.exe 15->34         started        40 4 other processes 15->40 90 Uses WMIC command to query system information (often done to detect virtual machines) 20->90 36 WMIC.exe 1 20->36         started        38 find.exe 1 20->38         started        42 2 other processes 22->42 66 C:\Windows\Temp\$77-cartfein.exe, PE32+ 24->66 dropped 92 Writes to foreign memory regions 24->92 94 Renames powershell.exe to bypass HIPS 24->94 96 Creates a thread in another existing process (thread injection) 24->96 44 3 other processes 24->44 46 2 other processes 26->46 file9 signatures10 process11 file12 70 C:\...\$77files.vbs:Zone.Identifier, ASCII 28->70 dropped 118 Creates / moves files in alternative data streams (ADS) 28->118 48 conhost.exe 28->48         started        72 C:\Users\user\...\$77.vbs:Zone.Identifier, ASCII 32->72 dropped 50 conhost.exe 32->50         started        52 conhost.exe 34->52         started        54 Conhost.exe 34->54         started        56 conhost.exe 40->56         started        58 conhost.exe 40->58         started        signatures13 process14
Score:
92%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/47ff081bdf4d8189b5502692f0899cb4e9f7495a033555f913dda52da9a168dd
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/47ff081bdf4d8189b5502692f0899cb4e9f7495a033555f913dda52da9a168dd/
Verdict:
Clean
Link:
https://tip.neiki.dev/file/47ff081bdf4d8189b5502692f0899cb4e9f7495a033555f913dda52da9a168dd
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=i77qqg67jwaytnkqe2jpbcm4wtu7osk2am2vl6it3wss3knbndoq._file
Result
Malware family:
n/a
Score:
  1/10
Tags:
n/a
Link:
https://tria.ge/reports/260204-ns1f3sgz6h/
Behaviour
Suspicious use of WriteProcessMemory
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.85
Link:
https://yomi.yoroi.company/submissions/47ff081bdf4d8189b5502692f0899cb4e9f7495a033555f913dda52da9a168dd

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:Check_VBox_Guest_Additions
Create hunting rule
Rule name:Check_VmTools
Create hunting rule
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:vmdetect
Create hunting rule
Author:nex
Description:Possibly employs anti-virtualization techniques

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/51669/

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