Windows Analysis Report
download.js

Overview

General Information

Sample name: download.js
Analysis ID: 1559077
MD5: b1ffd19d6eeb81cc25fe4b1ba561b86d
SHA1: 4d417b7d0eb2efed724454543ac3ad7c2c5eb7cf
SHA256: 216c2a54ea98e4e2d48c48c308c065cbb9644b3698a99543c6e95987b494fc70
Tags: jsKongTukeuser-monitorsg
Infos:

Detection

Score: 22
Range: 0 - 100
Whitelisted: false
Confidence: 80%

Signatures

Sigma detected: WScript or CScript Dropper
Found WSH timer for Javascript or VBS script (likely evasive script)
Java / VBScript file with very long strings (likely obfuscated code)
Program does not show much activity (idle)
Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript

Classification

Java / VBScript file with very long strings (likely obfuscated code)
Source: download.js Initial sample: Strings found which are bigger than 50
Source: classification engine Classification label: sus22.winJS@1/0@0/0
Source: C:\Windows\System32\wscript.exe Key opened: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: version.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: kernel.appcore.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: uxtheme.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: sxs.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: jscript.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: iertutil.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: amsi.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: userenv.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: profapi.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: wldp.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: msasn1.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: cryptsp.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: rsaenh.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: cryptbase.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: msisip.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: wshext.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: scrobj.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: textshaping.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: textinputframework.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: coreuicomponents.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: coremessaging.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: ntmarta.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: wintypes.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: wintypes.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Section loaded: wintypes.dll Jump to behavior
Source: C:\Windows\System32\wscript.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{f414c260-6ac0-11cf-b6d1-00aa00bbbb58}\InprocServer32 Jump to behavior
Source: C:\Windows\System32\wscript.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\wscript.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Found WSH timer for Javascript or VBS script (likely evasive script)
Source: C:\Windows\System32\wscript.exe Window found: window name: WSH-Timer Jump to behavior
Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Source: C:\Windows\System32\wscript.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography MachineGuid Jump to behavior
windows-stand
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Legend:

  • Process
  • Signature
  • Created File
  • DNS/IP Info
  • Is Dropped
  • Is Windows Process
  • Number of created Registry Values
  • Number of created Files
  • Visual Basic
  • Delphi
  • Java
  • .Net C# or VB.NET
  • C, C++ or other language
  • Is malicious
  • Internet
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1559077 Sample: download.js Startdate: 20/11/2024 Architecture: WINDOWS Score: 22 7 Sigma detected: WScript or CScript Dropper 2->7 5 wscript.exe 2->5         started        process3
⊘No contacted IP infos