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Windows Analysis Report
deobvuscted.js

Overview

General Information

Sample name:	deobvuscted.js
Analysis ID:	1426985
MD5:	f27654bf029399ff659c3d5003acd8c2
SHA1:	72f3a9b1d7513577723ccc9211bbe907a6c38297
SHA256:	9dfc38f8f103624e6a3a5dad86d370ff9f58f2f48447002f15c8d6f3b5941f58
Infos:

Detection

Score:	52
Range:	0 - 100
Whitelisted:	false
Confidence:	100%

Signatures

Found potential dummy code loops (likely to delay analysis)

JavaScript source code contains call to eval() to check own source code (likely for evading instrumentation)

Sigma detected: WScript or CScript Dropper

Abnormal high CPU Usage

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

Process Tree

System is w10x64

wscript.exe (PID: 2132 cmdline: C:\Windows\System32\WScript.exe "C:\Users\user\Desktop\deobvuscted.js" MD5: A47CBE969EA935BDD3AB568BB126BC80)

cleanup

Sigma Signatures

System Summary

Sigma detected: WScript or CScript Dropper

Source: Process started

Author: Margaritis Dimitrios (idea), Florian Roth (Nextron Systems), oscd.community: Data: Command: C:\Windows\System32\WScript.exe "C:\Users\user\Desktop\deobvuscted.js", CommandLine: C:\Windows\System32\WScript.exe "C:\Users\user\Desktop\deobvuscted.js", CommandLine|base64offset|contains: , Image: C:\Windows\System32\wscript.exe, NewProcessName: C:\Windows\System32\wscript.exe, OriginalFileName: C:\Windows\System32\wscript.exe, ParentCommandLine: , ParentImage: , ParentProcessId: 2580, ProcessCommandLine: C:\Windows\System32\WScript.exe "C:\Users\user\Desktop\deobvuscted.js", ProcessId: 2132, ProcessName: wscript.exe

Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript

Source: Process started

Author: Michael Haag: Data: Command: C:\Windows\System32\WScript.exe "C:\Users\user\Desktop\deobvuscted.js", CommandLine: C:\Windows\System32\WScript.exe "C:\Users\user\Desktop\deobvuscted.js", CommandLine|base64offset|contains: , Image: C:\Windows\System32\wscript.exe, NewProcessName: C:\Windows\System32\wscript.exe, OriginalFileName: C:\Windows\System32\wscript.exe, ParentCommandLine: , ParentImage: , ParentProcessId: 2580, ProcessCommandLine: C:\Windows\System32\WScript.exe "C:\Users\user\Desktop\deobvuscted.js", ProcessId: 2132, ProcessName: wscript.exe

Snort Signatures

⊘No Snort rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

Source: C:\Windows\System32\wscript.exe

Process Stats: CPU usage > 49%

Source: deobvuscted.js

Initial sample: Strings found which are bigger than 50

Source: classification engine

Classification label: mal52.evad.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: scrrun.dll	Jump to behavior
Source: C:\Windows\System32\wscript.exe	Section loaded: windows.storage.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

Malware Analysis System Evasion

JavaScript source code contains call to eval() to check own source code (likely for evading instrumentation)

Source: deobvuscted.js

Check function source code vs Regexp: /\w+ *\(\) *{\w+ *['|"].+['|"];? *}/.test("function () { jbxlog ( [ "exec", 17764 ], [ "f", "" ] ) ; return "newState"; }")

Source: C:\Windows\System32\wscript.exe

Window found: window name: WSH-Timer

Jump to behavior

Source: all processes

Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected

Anti Debugging

Found potential dummy code loops (likely to delay analysis)

Source: C:\Windows\System32\wscript.exe

Process Stats: CPU usage > 42% for more than 60s

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

Mitre Att&ck Matrix

Reconnaissance	Resource Development	Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Command and Control	Exfiltration	Impact
Gather Victim Identity Information	12 Scripting	Valid Accounts	Windows Management Instrumentation	12 Scripting	1 DLL Side-Loading	11 Virtualization/Sandbox Evasion	OS Credential Dumping	2 Security Software Discovery	Remote Services	Data from Local System	Data Obfuscation	Exfiltration Over Other Network Medium	Abuse Accessibility Features
Credentials	Domains	Default Accounts	Scheduled Task/Job	1 DLL Side-Loading	Boot or Logon Initialization Scripts	1 DLL Side-Loading	LSASS Memory	11 Virtualization/Sandbox Evasion	Remote Desktop Protocol	Data from Removable Media	Junk Data	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	Logon Script (Windows)	1 Obfuscated Files or Information	Security Account Manager	2 System Information Discovery	SMB/Windows Admin Shares	Data from Network Shared Drive	Steganography	Automated Exfiltration	Data Encrypted for Impact

Behavior Graph

Hide Legend

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

Joe Sandbox version:	40.0.0 Tourmaline
Analysis ID:	1426985
Start date and time:	2024-04-16 20:42:19 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 6m 20s
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	default.jbs
Analysis system description:	Windows 10 x64 22H2 with Office Professional Plus 2019, Chrome 117, Firefox 118, Adobe Reader DC 23, Java 8 Update 381, 7zip 23.01
Number of analysed new started processes analysed:	5
Number of new started drivers analysed:	0
Number of existing processes analysed:	0
Number of existing drivers analysed:	0
Number of injected processes analysed:	0
Technologies:	HCA enabled EGA enabled GSI enabled (Javascript) AMSI enabled
Analysis Mode:	default
Analysis stop reason:	Timeout
Sample name:	deobvuscted.js
Detection:	MAL
Classification:	mal52.evad.winJS@1/0@0/0
EGA Information:	Failed
HCA Information:	Successful, ratio: 100% Number of executed functions: 0 Number of non-executed functions: 0
Cookbook Comments:	Found application associated with file extension: .js Override analysis time to 240s for JS/VBS files not yet terminated

Warnings

Exclude process from analysis (whitelisted): MpCmdRun.exe, WMIADAP.exe, SIHClient.exe, conhost.exe
Excluded domains from analysis (whitelisted): ocsp.digicert.com, slscr.update.microsoft.com, ctldl.windowsupdate.com, fe3cr.delivery.mp.microsoft.com
Not all processes where analyzed, report is missing behavior information
VT rate limit hit for: deobvuscted.js

File type:	ASCII text, with very long lines (62611)
Entropy (8bit):	5.68093176250176
TrID:
File name:	deobvuscted.js
File size:	81'575 bytes
MD5:	f27654bf029399ff659c3d5003acd8c2
SHA1:	72f3a9b1d7513577723ccc9211bbe907a6c38297
SHA256:	9dfc38f8f103624e6a3a5dad86d370ff9f58f2f48447002f15c8d6f3b5941f58
SHA512:	a37c85a1f3ce1a67a0ec06993e8f77f9aa6fb0a00e4794f591c0c4dc76476233a2629c25f84a6fb56e7cdb07ae682eb06a258e09b7f4dac989d2a7062331810f
SSDEEP:	768:/hBXEDoiPBhGXxm3MVspiAF/o1hrG6xwgi06pE0qMtM5cUE+0FCMT0HK5:/hB0U6eX83a5i/oPROgihtu0FxT0HK5
TLSH:	6383214F00FE2C2A53BBA8F5656D8E2FF559D1CD015F84A4351A4F8C1A1FB18EB2164B
File Content Preview:	(function (i, L) {. var i8 = fzawCT, K = i();. while (true) {. try {. var V = parseInt(i8(379)) / 1 + parseInt(i8(366)) / 2 * (-parseInt(i8(454)) / 3) + -parseInt(i8(368)) / 4 * (-parseInt(i8(380)) / 5) + -parseInt(i8(457)) / 6 + -parseInt(i8(36

File Icon


Icon Hash:	68d69b8bb6aa9a86

Target ID:	0
Start time:	20:43:05
Start date:	16/04/2024
Path:	C:\Windows\System32\wscript.exe
Wow64 process (32bit):	false
Commandline:	C:\Windows\System32\WScript.exe "C:\Users\user\Desktop\deobvuscted.js"
Imagebase:	0x7ff7c2110000
File size:	170'496 bytes
MD5 hash:	A47CBE969EA935BDD3AB568BB126BC80
Has elevated privileges:	false
Has administrator privileges:	false
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	false

Show Windows behavior

Chronological Activities

Disassembly

⊘No disassembly

Description:	This technique has been deprecated. Please use Command and Scripting Interpreter where appropriate.
Tactics:	Defense Evasion, Execution
Data Sources:
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may execute their own malicious payloads by side-loading DLLs. Similar to DLL Search Order Hijacking , side-loading involves hijacking which DLL a program loads. But rather than just planting the DLL within the search order of a program then waiting for the victim application to be invoked, adversaries may directly side-load their payloads by planting then invoking a legitimate application that executes their payload(s).
Tactics:	Defense Evasion, Persistence, Privilege Escalation
Data Sources:	File: File Creation, File: File Modification, Module: Module Load, Process: Process Creation
Platforms:	Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may employ various means to detect and avoid virtualization and analysis environments. This may include changing behaviors based on the results of checks for the presence of artifacts indicative of a virtual machine environment (VME) or sandbox. If the adversary detects a VME, they may alter their malware to disengage from the victim or conceal the core functions of the implant. They may also search for VME artifacts before dropping secondary or additional payloads. Adversaries may use the information learned from [Virtualization/Sandbox Evasion](https://attack.mitre.org/techniques/T1497) during automated discovery to shape follow-on behaviors.
Tactics:	Defense Evasion, Discovery
Data Sources:	Command: Command Execution, Process: OS API Execution, Process: Process Creation
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit. This is common behavior that can be used across different platforms and the network to evade defenses.
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Creation, File: File Metadata, Module: Module Load, Process: OS API Execution, Process: Process Creation, Script: Script Execution, WMI: WMI Creation, Windows Registry: Windows Registry Key Creation
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get a listing of security software, configurations, defensive tools, and sensors that are installed on a system or in a cloud environment. This may include things such as firewall rules and anti-virus. Adversaries may use the information from Security Software Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Firewall: Firewall Enumeration, Firewall: Firewall Metadata, Process: OS API Execution, Process: Process Creation
Platforms:	Azure AD, Google Workspace, IaaS, Linux, macOS, Office 365, SaaS, Windows
Url:	Open detailed description by Mitre

Description:	An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and architecture. Adversaries may use the information from System Information Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Process: OS API Execution, Process: Process Creation
Platforms:	IaaS, Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

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Windows Analysis Report deobvuscted.js

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Configuration

Yara Signatures

Sigma Signatures

System Summary

Snort Signatures

Joe Sandbox Signatures

System Summary

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

Anti Debugging

Language, Device and Operating System Detection

Mitre Att&ck Matrix

Behavior Graph

Screenshots

Thumbnails

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Unpacked PE Files

Domains

URLs

Domains and IPs

Contacted Domains

World Map of Contacted IPs

General Information

Warnings

Simulations

Behavior and APIs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

File Icon

Network Behavior

Statistics

CPU Usage

Memory Usage

High Level Behavior Distribution

back

System Behavior

Analysis Process: wscript.exePID: 2132, Parent PID: 2580

General

Chronological Activities

Disassembly

Windows Analysis Report
deobvuscted.js