MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bdd657a4d1e7c77a3ecb7a1d62ad4feb8d5562a6eb29470837262465cca0a234. 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


NanoCore


Vendor detections: 15


Intelligence 15 IOCs 2 YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: bdd657a4d1e7c77a3ecb7a1d62ad4feb8d5562a6eb29470837262465cca0a234
SHA3-384 hash: d996b05432750edbebad9733851121af2fc8283a74f8103d79b2cbd79c0535d7984daeee57531bdfec33f8d1c5c20feb
SHA1 hash: 1fdbf89e4020d98c2d620e53281b127bb7d0095e
MD5 hash: 0c2a091bc8a92615f6fe793b0b98c3e2
humanhash: beer-wolfram-monkey-oxygen
File name:POP.vbs
Download: download sample
Signature NanoCore
Create hunting rule
File size:1'250'955 bytes
First seen:2025-08-25 10:35:07 UTC
Last seen:2025-08-26 01:30:13 UTC
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 12288:vTtah3DmivJo5IRZuWOemDDUw7yL2qtTySUHpVH2:rU3ZKIR1OemfU9Vyt/W
TLSH T13845E826F91D235EEDADA23E0482CD5D62DA363DBBC50F2D7D139C5BA13B436425E0A0
Magika vba
Reporter abuse_ch
Tags:NanoCore RAT vbs


Avatar
abuse_ch
NanoCore C2:
http://jstakby.duckdns.org:3189/is-ready

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
http://jstakby.duckdns.org:3189/is-ready https://threatfox.abuse.ch/ioc/1574142/
75.102.34.221:3189 https://threatfox.abuse.ch/ioc/1574143/

Intelligence

File Origin
# of uploads :
2
# of downloads :
335
Origin country :
NL NL
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/23408/
Verdict:
Malicious
Score:
97.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68ac3c93eb163e0ec182a5e0
Tags:
vmdetect nanocore autorun
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm evasive obfuscated obfuscated obfuscated persistence
Link:
https://www.filescan.io/uploads/68ac3d9228a89d9dd4f36bf9/reports/93b190b6-f223-4885-a19e-bdb264ce37b2/overview
Verdict:
Malicious
Labled as:
GT:VB.ObfDldr.25
Link:
https://www.hybrid-analysis.com/sample/bdd657a4d1e7c77a3ecb7a1d62ad4feb8d5562a6eb29470837262465cca0a234
Verdict:
Malicious
File Type:
text
Link:
https://opentip.kaspersky.com/bdd657a4d1e7c77a3ecb7a1d62ad4feb8d5562a6eb29470837262465cca0a234/results?tab=lookup
Result
Threat name:
Nanocore, WSHRat
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1764451
Signature
.NET source code contains potential unpacker
Antivirus detection for dropped file
Benign windows process drops PE files
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Creates multiple autostart registry keys
Detected Nanocore Rat
Detected WSHRat
Drops script or batch files to the startup folder
Found malware configuration
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)
Multi AV Scanner detection for submitted file
Potential malicious VBS script found (has network functionality)
Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes)
Sigma detected: Drops script at startup location
Sigma detected: NanoCore
Sigma detected: Register Wscript In Run Key
Sigma detected: Script Initiated Connection to Non-Local Network
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Sigma detected: WScript or CScript Dropper - File
Suricata IDS alerts for network traffic
System process connects to network (likely due to code injection or exploit)
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)
Windows Shell Script Host drops VBS files
Wscript called in batch mode (surpress errors)
Yara detected Nanocore RAT
Yara detected WSHRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1764451 Sample: POP.vbs Startdate: 25/08/2025 Architecture: WINDOWS Score: 100 59 jstakby.duckdns.org 2->59 61 ansrt.duckdns.org 2->61 63 8 other IPs or domains 2->63 71 Sigma detected: Register Wscript In Run Key 2->71 73 Suricata IDS alerts for network traffic 2->73 75 Found malware configuration 2->75 79 19 other signatures 2->79 9 wscript.exe 6 3 2->9         started        13 wscript.exe 2->13         started        15 dnshost.exe 2->15         started        17 3 other processes 2->17 signatures3 77 Uses dynamic DNS services 61->77 process4 file5 49 C:\Users\user\AppData\Local\...\svchost.vbs, ASCII 9->49 dropped 51 C:\Users\user\AppData\Local\Temp\excel.xls, OpenDocument 9->51 dropped 91 Benign windows process drops PE files 9->91 93 Detected WSHRat 9->93 95 VBScript performs obfuscated calls to suspicious functions 9->95 101 5 other signatures 9->101 19 wscript.exe 3 9->19         started        22 EXCEL.EXE 120 59 9->22         started        97 Wscript called in batch mode (surpress errors) 13->97 25 wscript.exe 13->25         started        99 Detected Nanocore Rat 15->99 signatures6 process7 dnsIp8 43 C:\Users\user\AppData\Local\Temp\audiodg.js, ASCII 19->43 dropped 28 wscript.exe 1 2 19->28         started        32 wscript.exe 1 3 19->32         started        69 s-part-0012.t-0009.t-msedge.net 13.107.246.40, 443, 49735, 49738 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 22->69 34 splwow64.exe 22->34         started        89 System process connects to network (likely due to code injection or exploit) 25->89 file9 signatures10 process11 file12 53 C:\Users\user\AppData\Local\Temp\XBEnr.exe, PE32 28->53 dropped 103 Detected Nanocore Rat 28->103 36 XBEnr.exe 1 10 28->36         started        55 C:\Users\user\AppData\Roaming\svchost.js, ASCII 32->55 dropped 57 C:\Users\user\AppData\Roaming\...\svchost.js, ASCII 32->57 dropped 105 Creates multiple autostart registry keys 32->105 107 Windows Scripting host queries suspicious COM object (likely to drop second stage) 32->107 109 Wscript called in batch mode (surpress errors) 32->109 41 wscript.exe 7 32->41         started        signatures13 process14 dnsIp15 65 jstakby.duckdns.org 75.102.34.221, 3189, 49687, 49689 AS-COLOCROSSINGUS United States 36->65 67 ansrt.duckdns.org 36->67 45 C:\Users\user\AppData\Roaming\...\dnshost.exe, PE32 36->45 dropped 47 C:\Users\user\AppData\Roaming\...\run.dat, International 36->47 dropped 81 Antivirus detection for dropped file 36->81 83 Detected Nanocore Rat 36->83 85 Creates multiple autostart registry keys 36->85 87 Hides that the sample has been downloaded from the Internet (zone.identifier) 36->87 file16 signatures17
Score:
98%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/bdd657a4d1e7c77a3ecb7a1d62ad4feb8d5562a6eb29470837262465cca0a234
Verdict:
Malware
YARA:
1 match(es)
Tags:
ADODB.Stream DeObfuscated Microsoft.XMLDOM Obfuscated Scripting.FileSystemObject T1059.005 VBScript WScript.Shell
Link:
https://app.malva.re/file/0c2a091bc8a92615f6fe793b0b98c3e2
Detection:
nanocore
Create hunting rule
Link:
https://mwdb.cert.pl/sample/bdd657a4d1e7c77a3ecb7a1d62ad4feb8d5562a6eb29470837262465cca0a234/
Verdict:
Malicious
Threat:
Family.NANOCORE
Link:
https://tip.neiki.dev/file/bdd657a4d1e7c77a3ecb7a1d62ad4feb8d5562a6eb29470837262465cca0a234
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2025-08-25 10:42:37 UTC
File Type:
Text (VBS)
AV detection:
9 of 24 (37.50%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xxlfpjgr47dxupwlpiowflkp5ogvkyvg5muuocbxeysgltfaui2a._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
Similar samples:
error
NanoCore
Result
Malware family:
wshrat
Create hunting rule
Score:
  10/10
Tags:
family:nanocore family:wshrat defense_evasion discovery execution keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/250825-mre83svsaw/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies registry class
Script User-Agent
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Adds Run key to start application
Checks whether UAC is enabled
Checks computer location settings
Drops startup file
Executes dropped EXE
Badlisted process makes network request
NanoCore
Nanocore family
WSHRAT
Wshrat family
Malware Config
C2 Extraction:
http://jstakby.duckdns.org:3189
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Nanocore
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/bdd657a4d1e7c77a3ecb7a1d62ad4feb8d5562a6eb29470837262465cca0a234

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:botnet_plaintext_c2
Create hunting rule
Author:cip
Description:Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols.
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/23408/

Comments