MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 621da58b9aee9a07b42dfc239e6d0bc99344e28c05fb829358691f7cb268e4ac. 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


PhantomStealer


Vendor detections: 11


Intelligence 11 IOCs YARA 26 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 621da58b9aee9a07b42dfc239e6d0bc99344e28c05fb829358691f7cb268e4ac
SHA3-384 hash: 655787e6290d094586453b5d85caf89e00492cdc511780cf3347d66ef0c69cd464d3b2282eac88cb023e52a5adaf6775
SHA1 hash: f7a5d39d532429309783b5ed8c70747479dfed04
MD5 hash: 24d224ae3856ff207ad7f42d832399c7
humanhash: red-lemon-green-saturn
File name:FedEx345729876.js
Download: download sample
Signature PhantomStealer
Create hunting rule
File size:2'029'822 bytes
First seen:2026-07-20 07:16:49 UTC
Last seen:2026-07-20 07:27:22 UTC
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 96:NovBam8wZ7Zvt1dW1CLavCbkTklYi1vioJELWwOQcUbvAPWrHE//OBXU:eZ5VrdW1ezbkwUisoPWuWE
TLSH T110955A61AFE96698B0951344153BFB0B749FB0396301E3AD7C6DB0F0BBF5C8194A98B4
Magika javascript
Reporter lowmal3
Tags:js PhantomStealer

Intelligence

File Origin
# of uploads :
2
# of downloads :
156
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a5dcb8a85479d70bfb77ea2
Tags:
autorun cryxos
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
masquerade repaired
Link:
https://www.filescan.io/uploads/6a5dcb85534dac5a24ca4fda/reports/5b0ee926-b3f6-4251-a729-ffe70ab9ff84/overview
Verdict:
Malicious
Labled as:
Trojan.Cryxos.JS
Link:
https://www.hybrid-analysis.com/sample/621da58b9aee9a07b42dfc239e6d0bc99344e28c05fb829358691f7cb268e4ac
Verdict:
Malicious
File Type:
js
First seen:
2026-07-17T06:37:00Z UTC
Last seen:
2026-07-21T17:28:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/621da58b9aee9a07b42dfc239e6d0bc99344e28c05fb829358691f7cb268e4ac/results?tab=lookup
Result
Threat name:
KeyLogger, Phantom stealer
Create hunting rule
Detection:
malicious
Classification:
expl.spre.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1945043
Signature
Allocates memory in foreign processes
Antivirus detection for URL or domain
Browser instances using unsafe startup parameters
Creates a thread in another existing process (thread injection)
Creates processes via WMI
Detected large data written to user environment variables, potentially indicating payload staging for fileless execution
Drops script or batch files to the startup folder
Found malware configuration
Injects a PE file into a foreign processes
Monitors registry run keys for changes
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample uses process hollowing technique
Sample uses string decryption to hide its real strings
Sigma detected: Drops script at startup location
Sigma detected: MSBuild connects to smtp port
Sigma detected: Rare Remote Thread Creation By Uncommon Source Image
Sigma detected: Silenttrinity Stager Msbuild Activity
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected Costura Assembly Loader
Yara detected Keylogger Generic
Yara detected Phantom stealer
Yara detected Powershell decode and execute
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1945043 Sample: FedEx345729876.js Startdate: 20/07/2026 Architecture: WINDOWS Score: 100 69 resc.cloudinary.com.cdn.cloudflare.net 2->69 71 res.cloudinary.com 2->71 73 7 other IPs or domains 2->73 101 Suricata IDS alerts for network traffic 2->101 103 Found malware configuration 2->103 105 Antivirus detection for URL or domain 2->105 107 11 other signatures 2->107 10 powershell.exe 14 15 2->10         started        14 wscript.exe 2 3 2->14         started        17 wscript.exe 1 2->17         started        signatures3 process4 dnsIp5 81 resc.cloudinary.com.cdn.cloudflare.net 104.16.78.6, 443, 49768 CLOUDFLARENET-CloudflareIncUS Canada 10->81 83 misty-cherry-cea3.uploadsimg.workers.dev 172.67.221.50, 443, 49767, 49773 CLOUDFLARENET-CloudflareIncUS Canada 10->83 123 Writes to foreign memory regions 10->123 125 Injects a PE file into a foreign processes 10->125 19 MSBuild.exe 15 12 10->19         started        23 conhost.exe 10->23         started        65 C:\...\FedEx345729876.js:Zone.Identifier, ASCII 14->65 dropped 67 C:\Users\user\AppData\...\FedEx345729876.js, Unicode 14->67 dropped 127 Wscript starts Powershell (via cmd or directly) 14->127 129 Drops script or batch files to the startup folder 14->129 131 Windows Scripting host queries suspicious COM object (likely to drop second stage) 14->131 133 3 other signatures 14->133 25 powershell.exe 17->25         started        file6 signatures7 process8 dnsIp9 75 gimas.bg 195.191.149.33, 49818, 587 SUPERHOSTING_ASBG Bulgaria 19->75 77 icanhazip.com 104.16.185.241, 49817, 80 CLOUDFLARENET-CloudflareIncUS Canada 19->77 109 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 19->109 111 Tries to steal Mail credentials (via file / registry access) 19->111 113 Tries to harvest and steal browser information (history, passwords, etc) 19->113 121 4 other signatures 19->121 27 msedge.exe 19->27         started        31 firefox.exe 2 19->31         started        33 chrome.exe 19->33 injected 41 9 other processes 19->41 79 cloudinary.map.fastly.net 151.101.65.137, 443, 49775 FASTLY-FastlyIncUS Canada 25->79 115 Writes to foreign memory regions 25->115 117 Sample uses process hollowing technique 25->117 119 Injects a PE file into a foreign processes 25->119 35 conhost.exe 25->35         started        37 MSBuild.exe 25->37         started        39 MSBuild.exe 25->39         started        signatures10 process11 dnsIp12 85 192.168.2.4, 443, 49385, 49732 unknown unknown 27->85 87 239.255.255.250 unknown ZZ 27->87 59 C:\...\the-real-index~RF477bc.TMP (copy), COM 27->59 dropped 61 C:\Users\user\...\the-real-index (copy), COM 27->61 dropped 63 C:\Users\user\AppData\Local\...\temp-index, COM 27->63 dropped 43 msedge.exe 27->43         started        46 setup.exe 27->46         started        48 msedge.exe 27->48         started        53 3 other processes 27->53 50 firefox.exe 2 44 31->50         started        file13 process14 dnsIp15 89 150.171.109.77, 443, 49792 MICROSOFT-CORP-MSN-AS-BLOCK-MicrosoftCorporationUS South Africa 43->89 91 ln-0007.ln-msedge.net 150.171.22.17, 443, 49776, 49777 MICROSOFT-CORP-MSN-AS-BLOCK-MicrosoftCorporationUS United States 43->91 97 32 other IPs or domains 43->97 55 setup.exe 46->55         started        93 mozilla.map.fastly.net 151.101.129.91, 443, 49774 FASTLY-FastlyIncUS Canada 50->93 95 127.0.0.1 unknown unknown 50->95 99 Monitors registry run keys for changes 50->99 57 firefox.exe 1 50->57         started        signatures16 process17
Score:
30%
Verdict:
Benign
File Type:
SCRIPT
Link:
https://malprob.io/report/621da58b9aee9a07b42dfc239e6d0bc99344e28c05fb829358691f7cb268e4ac
Gathering data
Detection:
phantomstealer
Create hunting rule
Link:
https://mwdb.cert.pl/sample/621da58b9aee9a07b42dfc239e6d0bc99344e28c05fb829358691f7cb268e4ac/
Threat name:
Script-JS.Trojan.Cryxos
Create hunting rule
Status:
Malicious
First seen:
2026-07-17 12:56:08 UTC
File Type:
Binary
AV detection:
11 of 24 (45.83%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=mio2lc4252napnbn7qrz43ilzgjujyumax5yfe2ynepxzmti4swa._file
Result
Malware family:
phantom_stealer
Create hunting rule
Score:
  10/10
Tags:
family:phantom_stealer collection discovery execution persistence stealer
Link:
https://tria.ge/reports/260720-h4m28scv31/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
outlook_office_path
outlook_win_path
Command and Scripting Interpreter: JavaScript
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
System Location Discovery: System Language Discovery
System Time Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Looks up external IP address via web service
Drops startup file
Badlisted process makes network request
Detects PhantomStealer written in C#
Family: PhantomStealer
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:
0.85
Link:
https://yomi.yoroi.company/submissions/621da58b9aee9a07b42dfc239e6d0bc99344e28c05fb829358691f7cb268e4ac

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:grakate_stealer_nov_2021
Create hunting rule
Rule name:INDICATOR_EXE_Packed_Fody
Create hunting rule
Author:ditekSHen
Description:Detects executables manipulated with Fody
Rule name:INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
Create hunting rule
Author:ditekSHen
Description:Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs.
Rule name:INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
Author:ditekSHen
Description:Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_SandboxComputerNames
Create hunting rule
Author:ditekSHen
Description:Detects executables containing possible sandbox analysis VM names
Rule name:INDICATOR_SUSPICIOUS_EXE_SandboxUserNames
Create hunting rule
Author:ditekSHen
Description:Detects executables containing possible sandbox analysis VM usernames
Rule name:INDICATOR_SUSPICIOUS_EXE_TelegramChatBot
Create hunting rule
Author:ditekSHen
Description:Detects executables using Telegram Chat Bot
Rule name:INDICATOR_SUSPICIOUS_EXE_WirelessNetReccon
Create hunting rule
Author:ditekSHen
Description:Detects executables with interest in wireless interface using netsh
Rule name:Lumma_Stealer_Detection
Create hunting rule
Author:ashizZz
Description:Detects a specific Lumma Stealer malware sample using unique strings and behaviors
Reference:https://seanthegeek.net/posts/compromized-store-spread-lumma-stealer-using-fake-captcha/
Rule name:Macos_Infostealer_Wallets_8e469ea0
Create hunting rule
Author:Elastic Security
Rule name:malware_PhantomStealer
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:phantom stealer
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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
Rule name:VECT_Ransomware
Create hunting rule
Author:Mustafa Bakhit
Description:Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.
Rule name:Windows_Generic_Threat_f57e5e2a
Create hunting rule
Author:Elastic Security
Rule name:Windows_Trojan_Xeno_89f9f060
Create hunting rule
Author:Elastic Security

File information

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

Malspam

PhantomStealer

Java Script (JS) js 621da58b9aee9a07b42dfc239e6d0bc99344e28c05fb829358691f7cb268e4ac

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments