MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 440a48160f778b7682e9c52e99b1f71a5c99785675650bdfd197695e6d19e0b2. 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
DarkCoreRAT
Vendor detections: 10
| SHA256 hash: | 440a48160f778b7682e9c52e99b1f71a5c99785675650bdfd197695e6d19e0b2 |
|---|---|
| SHA3-384 hash: | 0e4bcab35cf4a2129e46ae6404092f333f482d45397a8ef6c5c154493af38c0c22d61b2d2bcfd518541566dabcafbd2b |
| SHA1 hash: | 4b8825ee42b713fe0e47d7d358d1374cbaa1f1e1 |
| MD5 hash: | 626663c21e5b5329cc19fcc7c758f30a |
| humanhash: | muppet-finch-dakota-grey |
| File name: | FUGASA_RFQ_Attachment_Items_List_and_Specifications_for_Quotation_Request_131026.xlsx.js |
| Download: | download sample |
| Signature | DarkCoreRAT |
| File size: | 1'823'145 bytes |
| First seen: | 2026-10-13 11:18:36 UTC |
| Last seen: | Never |
| File type: |  js |
| MIME type: | application/javascript |
| ssdeep | 1536:/XrDSNbN9d2JJLIzRuZMOq2bwx1IPbBr7ErpsHS6IK8OcJ6h1zE1OlFsLNQFh/Sp:IbN9d2JJUSVk1IPB7ErpGB4Jcg8veAO |
| TLSH | T118854A5303851BBDF68D0EC9C95B245B20F2E4677D251298EBB36EE7BC3B9849430636 |
| Magika | javascript |
| Reporter |  threatcat_ch |
| Tags: | DarkCoreRAT js |
Intelligence
File Origin
# of uploads :
1
# of downloads :
184
Origin country :
CHVendor Threat Intelligence
No detections
Detection(s):
Verdict:
Malicious
Score:
99.1%
Tags:
cryxos virus shell spawn
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
anti-vm base64 base64 encrypted evasive evasive fingerprint lolbin masquerade msbuild obfuscated packed reconnaissance repaired
Verdict:
Malicious
Labled as:
Trojan.Cryxos.JS
Verdict:
Malicious
File Type:
js
First seen:
2026-10-13T04:46:00Z UTC
Last seen:
2026-10-15T09:33:00Z UTC
Hits:
~1000
Result
Threat name:
DarkCore RAT
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
Bypasses PowerShell execution policy
Contains functionality to detect hardware virtualization (CPUID execution measurement)
Creates processes via WMI
Found stalling execution ending in API Sleep call
Injects a PE file into a foreign processes
JScript performs obfuscated calls to suspicious functions
Malicious sample detected (through community Yara rule)
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for submitted file
Sigma detected: Cscript/Wscript Uncommon Script Extension Execution
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Silenttrinity Stager Msbuild Activity
Sigma detected: Suspicious Parent Double Extension File Execution
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect sleep reduction / modifications
Tries to detect virtualization through RDTSC time measurements
Unusual module load detection (module proxying)
Uses an obfuscated file name to hide its real file extension (double extension)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript called in batch mode (surpress errors)
Wscript starts Powershell (via cmd or directly)
Yara detected DarkCore RAT
Behaviour
Behavior Graph:
Score:
37%
Verdict:
Susipicious
File Type:
SCRIPT
Gathering data
Threat name:
Script-JS.Backdoor.FormBook
Status:
Malicious
First seen:
2026-10-13 07:57:16 UTC
File Type:
Text (JavaScript)
AV detection:
14 of 23 (60.87%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
10/10
Tags:
discovery execution persistence
Behaviour
Checks processor information in registry
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Command and Scripting Interpreter: JavaScript
Reads the TCP/IP host and domain name from the registry
Drops file in Windows directory
Suspicious use of SetThreadContext
Looks up external IP address via web service
Command and Scripting Interpreter: PowerShell
Process spawned unexpected child process
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: | ClamAV_Emotet_String_Aggregate |
|---|
| Rule name: | SCRIPT_Dropper_Unknown_ForgeAuto_0507f067_Script |
|---|---|
| Author: | Marjoriefort |
| Description: | Detects Unknown (script_js, etat script) |
| 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) |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
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