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Windows Analysis Report
WebCompanion.dll

Overview

General Information

Sample name:	WebCompanion.dll
Analysis ID:	1431812
MD5:	34c69daef314154af848b3c73c60e2cc
SHA1:	95c4eaecb8a6ca0ddd2fa13d83ccd3a64589ccb7
SHA256:	543e02fe9b683f89dcc3f838c1ec17c8822c3da7b69da132ec13f0000c547a80
Infos:

Detection

Score:	56
Range:	0 - 100
Whitelisted:	false
Confidence:	100%

Signatures

Multi AV Scanner detection for submitted file

.NET source code contains potential unpacker

Yara detected Generic Downloader

Creates a process in suspended mode (likely to inject code)

Program does not show much activity (idle)

Sample execution stops while process was sleeping (likely an evasion)

Sample file is different than original file name gathered from version info

Uses 32bit PE files

Classification

Process Tree

System is w10x64

loaddll32.exe (PID: 7340 cmdline: loaddll32.exe "C:\Users\user\Desktop\WebCompanion.dll" MD5: 51E6071F9CBA48E79F10C84515AAE618)

conhost.exe (PID: 7348 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: 0D698AF330FD17BEE3BF90011D49251D)

cmd.exe (PID: 7428 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\WebCompanion.dll",#1 MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B)

rundll32.exe (PID: 7444 cmdline: rundll32.exe "C:\Users\user\Desktop\WebCompanion.dll",#1 MD5: 889B99C52A60DD49227C5E485A016679)

cleanup

Malware Configuration

⊘No configs have been found

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
WebCompanion.dll	JoeSecurity_GenericDownloader_1	Yara detected Generic Downloader	Joe Security

Sigma Signatures

⊘No Sigma rule has matched

Snort Signatures

⊘No Snort rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: WebCompanion.dll

ReversingLabs: Detection: 23%

Source: WebCompanion.dll

Static PE information: EXECUTABLE_IMAGE, 32BIT_MACHINE, DLL

Source: WebCompanion.dll

Static PE information: certificate valid

Source: WebCompanion.dll

Static PE information: HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE

Source:	Binary string: c:\dev\sqlite\dotnet\obj\2008\Release\System.Data.SQLite.pdbX. source: WebCompanion.dll
Source:	Binary string: c:\Development\Releases\Json\Working\Newtonsoft.Json\Src\Newtonsoft.Json\obj\Release\Newtonsoft.Json.pdb source: WebCompanion.dll
Source:	Binary string: c:\dev\sqlite\dotnet\obj\2008\Release\System.Data.SQLite.pdb source: WebCompanion.dll
Source:	Binary string: Z:\Documents\bidmonitor\web-companion\WebCompanion\bin\Release\Dotfuscated\WebCompanion.Merged.pdb source: WebCompanion.dll
Source:	Binary string: d:\Projects\lz4net\src\LZ4.net2\obj\Release\LZ4.pdb source: WebCompanion.dll
Source:	Binary string: Z:\Documents\bidmonitor\web-companion\WebCompanion\bin\Release\Dotfuscated\WebCompanion.Merged.pdb, source: WebCompanion.dll

Networking

Yara detected Generic Downloader

Source: Yara match

File source: WebCompanion.dll, type: SAMPLE

Source: WebCompanion.dll	String found in binary or memory: http://aia.entrust.net/evcs1-chain256.cer01
Source: WebCompanion.dll	String found in binary or memory: http://cacerts.digicert.com/DigiCertAssuredIDRootCA.crt0
Source: WebCompanion.dll	String found in binary or memory: http://cacerts.digicert.com/DigiCertAssuredIDRootCA.crt0E
Source: WebCompanion.dll	String found in binary or memory: http://cacerts.digicert.com/DigiCertSHA2AssuredIDTimestampingCA.crt0
Source: WebCompanion.dll	String found in binary or memory: http://cacerts.digicert.com/DigiCertTrustedG4CodeSigningRSA4096SHA3842021CA1.crt0
Source: WebCompanion.dll	String found in binary or memory: http://cacerts.digicert.com/DigiCertTrustedG4RSA4096SHA256TimeStampingCA.crt0
Source: WebCompanion.dll	String found in binary or memory: http://cacerts.digicert.com/DigiCertTrustedRootG4.crt0C
Source: WebCompanion.dll	String found in binary or memory: http://crl.entrust.net/evcs1.crl0
Source: WebCompanion.dll	String found in binary or memory: http://crl.entrust.net/g2ca.crl0;
Source: WebCompanion.dll	String found in binary or memory: http://crl3.digicert.com/DigiCertAssuredIDRootCA.crl0
Source: WebCompanion.dll	String found in binary or memory: http://crl3.digicert.com/DigiCertAssuredIDRootCA.crl0P
Source: WebCompanion.dll	String found in binary or memory: http://crl3.digicert.com/DigiCertTrustedG4CodeSigningRSA4096SHA3842021CA1.crl0S
Source: WebCompanion.dll	String found in binary or memory: http://crl3.digicert.com/DigiCertTrustedG4RSA4096SHA256TimeStampingCA.crl0
Source: WebCompanion.dll	String found in binary or memory: http://crl3.digicert.com/DigiCertTrustedRootG4.crl0
Source: WebCompanion.dll	String found in binary or memory: http://crl3.digicert.com/sha2-assured-ts.crl02
Source: WebCompanion.dll	String found in binary or memory: http://crl4.digicert.com/DigiCertAssuredIDRootCA.crl0:
Source: WebCompanion.dll	String found in binary or memory: http://crl4.digicert.com/DigiCertTrustedG4CodeSigningRSA4096SHA3842021CA1.crl0=
Source: WebCompanion.dll	String found in binary or memory: http://crl4.digicert.com/sha2-assured-ts.crl0
Source: WebCompanion.dll	String found in binary or memory: http://dkf201.com%http://wzp9182.comIhttp://d2vtta4ibs40qt.cloudfront.netI1f667d94-35d0-4958-aa21-54
Source: WebCompanion.dll	String found in binary or memory: http://james.newtonking.com/projects/json
Source: WebCompanion.dll	String found in binary or memory: http://ocsp.digicert.com0
Source: WebCompanion.dll	String found in binary or memory: http://ocsp.digicert.com0A
Source: WebCompanion.dll	String found in binary or memory: http://ocsp.digicert.com0C
Source: WebCompanion.dll	String found in binary or memory: http://ocsp.digicert.com0O
Source: WebCompanion.dll	String found in binary or memory: http://ocsp.digicert.com0X
Source: WebCompanion.dll	String found in binary or memory: http://ocsp.entrust.net00
Source: WebCompanion.dll	String found in binary or memory: http://ocsp.entrust.net05
Source: WebCompanion.dll	String found in binary or memory: http://rt.webcompanion.com/notifications/download/rt/searchenginetemplate.xml
Source: WebCompanion.dll	String found in binary or memory: http://system.data.sqlite.org/
Source: WebCompanion.dll	String found in binary or memory: http://system.data.sqlite.org/X
Source: WebCompanion.dll	String found in binary or memory: http://www.digicert.com/CPS0
Source: WebCompanion.dll	String found in binary or memory: http://www.entrust.net/rpa0
Source: WebCompanion.dll	String found in binary or memory: http://www.mozilla.org/2006/browser/search/=//msbld:Url
Source: WebCompanion.dll	String found in binary or memory: https://search-get.com/wc/search?q=
Source: WebCompanion.dll	String found in binary or memory: https://www.digicert.com/CPS0
Source: WebCompanion.dll	String found in binary or memory: https://www.entrust.net/rpa0
Source: WebCompanion.dll	String found in binary or memory: https://www.search-get.com/favicon.ico

Source: WebCompanion.dll	Binary or memory string: OriginalFilenameICSharpCode.SharpZipLib.dll8 vs WebCompanion.dll
Source: WebCompanion.dll	Binary or memory string: OriginalFilenameLZ4.dll( vs WebCompanion.dll
Source: WebCompanion.dll	Binary or memory string: OriginalFilenameNewtonsoft.Json.dll4 vs WebCompanion.dll
Source: WebCompanion.dll	Binary or memory string: OriginalFilenameSystem.Data.SQLite.dllH vs WebCompanion.dll

Source: WebCompanion.dll

Static PE information: EXECUTABLE_IMAGE, 32BIT_MACHINE, DLL

Source: WebCompanion.dll, ac.cs	Cryptographic APIs: 'TransformBlock'
Source: WebCompanion.dll, InflaterInputBuffer.cs	Cryptographic APIs: 'TransformBlock'
Source: WebCompanion.dll, DeflaterOutputStream.cs	Cryptographic APIs: 'TransformBlock'

Source: WebCompanion.dll, Scheduler.cs

Task registration methods: 'CreateLogonScheduledTask'

Source: WebCompanion.dll, Scheduler.cs	Security API names: System.Security.Principal.WindowsIdentity.GetCurrent()
Source: WebCompanion.dll, FileHelper.cs	Security API names: System.IO.FileInfo.SetAccessControl(System.Security.AccessControl.FileSecurity)
Source: WebCompanion.dll, FileHelper.cs	Security API names: System.IO.FileInfo.GetAccessControl()
Source: WebCompanion.dll, FileHelper.cs	Security API names: System.Security.AccessControl.FileSystemSecurity.AddAccessRule(System.Security.AccessControl.FileSystemAccessRule)

Source: classification engine

Classification label: mal56.troj.evad.winDLL@6/0@0/0

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

Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:7348:120:WilError_03

Source: WebCompanion.dll

Static PE information: Section: .text IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ

Source: WebCompanion.dll

Static file information: TRID: Win32 Dynamic Link Library (generic) Net Framework (1011504/3) 44.58%

Source: C:\Windows\System32\loaddll32.exe

Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers

Jump to behavior

Source: C:\Windows\SysWOW64\cmd.exe

Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\WebCompanion.dll",#1

Source: WebCompanion.dll

ReversingLabs: Detection: 23%

Source: unknown	Process created: C:\Windows\System32\loaddll32.exe loaddll32.exe "C:\Users\user\Desktop\WebCompanion.dll"
Source: C:\Windows\System32\loaddll32.exe	Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll32.exe	Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\WebCompanion.dll",#1
Source: C:\Windows\SysWOW64\cmd.exe	Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\WebCompanion.dll",#1
Source: C:\Windows\System32\loaddll32.exe	Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\WebCompanion.dll",#1	Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe	Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\WebCompanion.dll",#1	Jump to behavior

Source: C:\Windows\System32\loaddll32.exe	Section loaded: apphelp.dll	Jump to behavior
Source: C:\Windows\System32\loaddll32.exe	Section loaded: kernel.appcore.dll	Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe	Section loaded: apphelp.dll	Jump to behavior

Source: WebCompanion.dll

Static PE information: certificate valid

Source: WebCompanion.dll

Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR

Source: WebCompanion.dll

Static PE information: Virtual size of .text is bigger than: 0x100000

Source: WebCompanion.dll

Static file information: File size 3857728 > 1048576

Source: WebCompanion.dll

Static PE information: Raw size of .text is bigger than: 0x100000 < 0x3aa600

Source: WebCompanion.dll

Static PE information: HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE

Source: WebCompanion.dll

Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG

Source:	Binary string: c:\dev\sqlite\dotnet\obj\2008\Release\System.Data.SQLite.pdbX. source: WebCompanion.dll
Source:	Binary string: c:\Development\Releases\Json\Working\Newtonsoft.Json\Src\Newtonsoft.Json\obj\Release\Newtonsoft.Json.pdb source: WebCompanion.dll
Source:	Binary string: c:\dev\sqlite\dotnet\obj\2008\Release\System.Data.SQLite.pdb source: WebCompanion.dll
Source:	Binary string: Z:\Documents\bidmonitor\web-companion\WebCompanion\bin\Release\Dotfuscated\WebCompanion.Merged.pdb source: WebCompanion.dll
Source:	Binary string: d:\Projects\lz4net\src\LZ4.net2\obj\Release\LZ4.pdb source: WebCompanion.dll
Source:	Binary string: Z:\Documents\bidmonitor\web-companion\WebCompanion\bin\Release\Dotfuscated\WebCompanion.Merged.pdb, source: WebCompanion.dll

Data Obfuscation

.NET source code contains potential unpacker

Source: WebCompanion.dll, d1.cs	.Net Code: dz
Source: WebCompanion.dll, dq.cs	.Net Code: a
Source: WebCompanion.dll, Scheduler.cs	.Net Code: CreateLogonScheduledTask

Source: C:\Windows\SysWOW64\rundll32.exe

Process information set: NOOPENFILEERRORBOX

Jump to behavior

Source: all processes

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

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

Last function: Thread delayed

Source: C:\Windows\System32\loaddll32.exe

Thread delayed: delay time: 120000

Jump to behavior

Source: all processes

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

Source: C:\Windows\SysWOW64\cmd.exe

Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\WebCompanion.dll",#1

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	Acquire Infrastructure	Valid Accounts	1 Scheduled Task/Job	1 Scheduled Task/Job	11 Process Injection	1 Rundll32	OS Credential Dumping	1 Virtualization/Sandbox Evasion	Remote Services	1 Archive Collected Data	Data Obfuscation	Exfiltration Over Other Network Medium	Abuse Accessibility Features
Credentials	Domains	Default Accounts	Scheduled Task/Job	1 DLL Side-Loading	1 Scheduled Task/Job	1 Virtualization/Sandbox Evasion	LSASS Memory	1 System Information Discovery	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)	1 DLL Side-Loading	1 Software Packing	Security Account Manager	Query Registry	SMB/Windows Admin Shares	Data from Network Shared Drive	Steganography	Automated Exfiltration	Data Encrypted for Impact
Employee Names	Virtual Private Server	Local Accounts	Cron	Login Hook	Login Hook	11 Process Injection	NTDS	System Network Configuration Discovery	Distributed Component Object Model	Input Capture	Protocol Impersonation	Traffic Duplication	Data Destruction
Gather Victim Network Information	Server	Cloud Accounts	Launchd	Network Logon Script	Network Logon Script	1 Deobfuscate/Decode Files or Information	LSA Secrets	Internet Connection Discovery	SSH	Keylogging	Fallback Channels	Scheduled Transfer	Data Encrypted for Impact
Domain Properties	Botnet	Replication Through Removable Media	Scheduled Task	RC Scripts	RC Scripts	1 DLL Side-Loading	Cached Domain Credentials	Wi-Fi Discovery	VNC	GUI Input Capture	Multiband Communication	Data Transfer Size Limits	Service Stop

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

Source	Detection	Scanner	Label	Link
WebCompanion.dll	24%	ReversingLabs	Win32.Adware.Blazer

Source	Detection	Scanner	Label
http://ocsp.entrust.net00	0%	URL Reputation	safe
http://james.newtonking.com/projects/json	0%	URL Reputation	safe
https://search-get.com/wc/search?q=	0%	Avira URL Cloud	safe
https://www.search-get.com/favicon.ico	0%	Avira URL Cloud	safe
http://ocsp.entrust.net05	0%	Avira URL Cloud	safe
http://dkf201.com%http://wzp9182.comIhttp://d2vtta4ibs40qt.cloudfront.netI1f667d94-35d0-4958-aa21-54	0%	Avira URL Cloud	safe

Name	Source	Malicious	Antivirus Detection	Reputation
http://rt.webcompanion.com/notifications/download/rt/searchenginetemplate.xml	WebCompanion.dll	false		high
http://crl.entrust.net/g2ca.crl0;	WebCompanion.dll	false		high
http://ocsp.entrust.net05	WebCompanion.dll	false	Avira URL Cloud: safe	unknown
https://search-get.com/wc/search?q=	WebCompanion.dll	false	Avira URL Cloud: safe	unknown
http://ocsp.entrust.net00	WebCompanion.dll	false	URL Reputation: safe	unknown
http://crl.entrust.net/evcs1.crl0	WebCompanion.dll	false		high
https://www.search-get.com/favicon.ico	WebCompanion.dll	false	Avira URL Cloud: safe	unknown
http://system.data.sqlite.org/X	WebCompanion.dll	false		high
http://www.entrust.net/rpa0	WebCompanion.dll	false		high
http://aia.entrust.net/evcs1-chain256.cer01	WebCompanion.dll	false		high
http://james.newtonking.com/projects/json	WebCompanion.dll	false	URL Reputation: safe	unknown
http://dkf201.com%http://wzp9182.comIhttp://d2vtta4ibs40qt.cloudfront.netI1f667d94-35d0-4958-aa21-54	WebCompanion.dll	false	Avira URL Cloud: safe	low
https://www.entrust.net/rpa0	WebCompanion.dll	false		high
http://system.data.sqlite.org/	WebCompanion.dll	false		high

World Map of Contacted IPs

⊘No contacted IP infos

General Information

Joe Sandbox version:	40.0.0 Tourmaline
Analysis ID:	1431812
Start date and time:	2024-04-25 20:06:56 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 19s
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:	14
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 AMSI enabled
Analysis Mode:	default
Analysis stop reason:	Timeout
Sample name:	WebCompanion.dll
Detection:	MAL
Classification:	mal56.troj.evad.winDLL@6/0@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: .dll

Warnings

Exclude process from analysis (whitelisted): MpCmdRun.exe, dllhost.exe, SIHClient.exe, Sgrmuserer.exe, conhost.exe, svchost.exe
Excluded domains from analysis (whitelisted): 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: WebCompanion.dll

Simulations

Behavior and APIs

Time	Type	Description
20:07:40	API Interceptor	1x Sleep call for process: loaddll32.exe modified

File type:	PE32 executable (DLL) (console) Intel 80386 Mono/.Net assembly, for MS Windows
Entropy (8bit):	5.518965075440277
TrID:	Win32 Dynamic Link Library (generic) Net Framework (1011504/3) 44.58% Win32 Dynamic Link Library (generic) (1002004/3) 44.17% Generic .NET DLL/Assembly (238134/4) 10.50% Windows Screen Saver (13104/52) 0.58% Generic Win/DOS Executable (2004/3) 0.09%
File name:	WebCompanion.dll
File size:	3'857'728 bytes
MD5:	34c69daef314154af848b3c73c60e2cc
SHA1:	95c4eaecb8a6ca0ddd2fa13d83ccd3a64589ccb7
SHA256:	543e02fe9b683f89dcc3f838c1ec17c8822c3da7b69da132ec13f0000c547a80
SHA512:	d2fbadc4d9233ea98d90be31fc00dbaf3cbf63dcf434c83d77021c0c9d4de170fefd9124134346c090dfd95f076526f8651ec3fd62f96242e60cb0cb3dd699b0
SSDEEP:	49152:FPn245TMSPgWgHzGsEIKa9+qv8toBKDrUOyFtJwXlZw77LQ0soNE8yivUy3DKf6T:H5aSsPLwU7FtJ4wfr
TLSH:	7D06A3037BA48D26D8F9F3379B662E11B3A7B44C6F43D31728C4D79A2816342AD0576E
File Content Preview:	MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$.......PE..L......c...........!......:.........^.:.. ........@.. ....................... ;......Y;...`................................

File Icon


Icon Hash:	7ae282899bbab082

Static PE Info

General

Entrypoint:	0x7ac55e
Entrypoint Section:	.text
Digitally signed:	true
Imagebase:	0x400000
Subsystem:	windows cui
Image File Characteristics:	EXECUTABLE_IMAGE, 32BIT_MACHINE, DLL
DLL Characteristics:	HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE
Time Stamp:	0x6305D682 [Wed Aug 24 07:42:58 2022 UTC]
TLS Callbacks:
CLR (.Net) Version:
OS Version Major:	4
OS Version Minor:	0
File Version Major:	4
File Version Minor:	0
Subsystem Version Major:	4
Subsystem Version Minor:	0
Import Hash:	dae02f32a21e03ce65412f6e56942daa

Authenticode Signature

Signature Valid:	true
Signature Issuer:	CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1, O="DigiCert, Inc.", C=US
Signature Validation Error:	The operation completed successfully
Error Number:	0
Not Before, Not After	28/02/2022 01:00:00 01/03/2023 00:59:59
Subject Chain	CN=Millennial Media Inc., O=Millennial Media Inc., L=Panama City, S=Panama, C=PA, SERIALNUMBER=155704409, OID.2.5.4.15=Private Organization, OID.1.3.6.1.4.1.311.60.2.1.3=PA
Version:	3
Thumbprint MD5:	CBD12A57009372827876A8D307FF14CB
Thumbprint SHA-1:	A00D344BDC112328D1969ADF9DECBE8A96035DC3
Thumbprint SHA-256:	420B0B9BD9773EBB3D9632019283CA919929C8A4A1F94B8B390493F55AB17442
Serial:	0A253234E29F318F9B6846682E99078D

Entrypoint Preview

Instruction
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Data Directories

Name	Virtual Address	Virtual Size	Is in Section
IMAGE_DIRECTORY_ENTRY_EXPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IMPORT	0x3ac504	0x57	.text
IMAGE_DIRECTORY_ENTRY_RESOURCE	0x3ae000	0x400	.rsrc
IMAGE_DIRECTORY_ENTRY_EXCEPTION	0x0	0x0
IMAGE_DIRECTORY_ENTRY_SECURITY	0x3aae00	0x2f40
IMAGE_DIRECTORY_ENTRY_BASERELOC	0x3b0000	0xc	.reloc
IMAGE_DIRECTORY_ENTRY_DEBUG	0x3ac46c	0x1c	.text
IMAGE_DIRECTORY_ENTRY_COPYRIGHT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_GLOBALPTR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_TLS	0x0	0x0
IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IAT	0x2000	0x8	.text
IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR	0x2008	0x48	.text
IMAGE_DIRECTORY_ENTRY_RESERVED	0x0	0x0

Sections

Name	Virtual Address	Virtual Size	Raw Size	MD5	Xored PE	ZLIB Complexity	File Type	Entropy	Characteristics
.text	0x2000	0x3aa564	0x3aa600	69192baa0afae393c3eeee1787448cc7	unknown	unknown	unknown	unknown	IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
.rsrc	0x3ae000	0x400	0x400	8ecb83987e05d7a1be393f2d32afcbca	False	0.3837890625	data	3.3012457591260107	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
.reloc	0x3b0000	0xc	0x200	b350db5996a59bf7369eb74afe8b061c	False	0.044921875	data	0.10191042566270775	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ

Resources

Name	RVA	Size	Type	Language	Country	ZLIB Complexity
RT_VERSION	0x3ae058	0x3a4	data			0.3937768240343348

Imports

DLL	Import
mscoree.dll	_CorDllMain

Target ID:	0
Start time:	20:07:40
Start date:	25/04/2024
Path:	C:\Windows\System32\loaddll32.exe
Wow64 process (32bit):	true
Commandline:	loaddll32.exe "C:\Users\user\Desktop\WebCompanion.dll"
Imagebase:	0xa90000
File size:	126'464 bytes
MD5 hash:	51E6071F9CBA48E79F10C84515AAE618
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	true

Show Windows behavior

Target ID:	1
Start time:	20:07:40
Start date:	25/04/2024
Path:	C:\Windows\System32\conhost.exe
Wow64 process (32bit):	false
Commandline:	C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Imagebase:	0x7ff620390000
File size:	862'208 bytes
MD5 hash:	0D698AF330FD17BEE3BF90011D49251D
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	true

Show Windows behavior

Target ID:	3
Start time:	20:07:40
Start date:	25/04/2024
Path:	C:\Windows\SysWOW64\cmd.exe
Wow64 process (32bit):	true
Commandline:	cmd.exe /C rundll32.exe "C:\Users\user\Desktop\WebCompanion.dll",#1
Imagebase:	0xd70000
File size:	236'544 bytes
MD5 hash:	D0FCE3AFA6AA1D58CE9FA336CC2B675B
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	true

Show Windows behavior

Target ID:	4
Start time:	20:07:40
Start date:	25/04/2024
Path:	C:\Windows\SysWOW64\rundll32.exe
Wow64 process (32bit):	true
Commandline:	rundll32.exe "C:\Users\user\Desktop\WebCompanion.dll",#1
Imagebase:	0xe20000
File size:	61'440 bytes
MD5 hash:	889B99C52A60DD49227C5E485A016679
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	true

Show Windows behavior

Chronological Activities

Disassembly

⊘No disassembly

Description:	Adversaries may abuse task scheduling functionality to facilitate initial or recurring execution of malicious code. Utilities exist within all major operating systems to schedule programs or scripts to be executed at a specified date and time. A task can also be scheduled on a remote system, provided the proper authentication is met (ex: RPC and file and printer sharing in Windows environments). Scheduling a task on a remote system typically may require being a member of an admin or otherwise privileged group on the remote system.
Tactics:	Execution, Persistence, Privilege Escalation
Data Sources:	Command: Command Execution, Container: Container Creation, File: File Creation, File: File Modification, Process: Process Creation, Scheduled Job: Scheduled Job Creation
Platforms:	Containers, 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 inject code into processes in order to evade process-based defenses as well as possibly elevate privileges. Process injection is a method of executing arbitrary code in the address space of a separate live process. Running code in the context of another process may allow access to the process's memory, system/network resources, and possibly elevated privileges. Execution via process injection may also evade detection from security products since the execution is masked under a legitimate process.
Tactics:	Defense Evasion, Privilege Escalation
Data Sources:	File: File Metadata, File: File Modification, Module: Module Load, Process: OS API Execution, Process: Process Access, Process: Process Metadata, Process: Process Modification
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may abuse rundll32.exe to proxy execution of malicious code. Using rundll32.exe, vice executing directly (i.e. Shared Modules ), may avoid triggering security tools that may not monitor execution of the rundll32.exe process because of allowlists or false positives from normal operations. Rundll32.exe is commonly associated with executing DLL payloads (ex: `rundll32.exe {DLLname, DLLfunction}` ).
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Metadata, 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 perform software packing or virtual machine software protection to conceal their code. Software packing is a method of compressing or encrypting an executable. Packing an executable changes the file signature in an attempt to avoid signature-based detection. Most decompression techniques decompress the executable code in memory. Virtual machine software protection translates an executable's original code into a special format that only a special virtual machine can run. A virtual machine is then called to run this code.
Tactics:	Defense Evasion
Data Sources:	File: File Metadata
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may use Obfuscated Files or Information to hide artifacts of an intrusion from analysis. They may require separate mechanisms to decode or deobfuscate that information depending on how they intend to use it. Methods for doing that include built-in functionality of malware or by using utilities present on the system.
Tactics:	Defense Evasion
Data Sources:	File: File Modification, Process: Process Creation, Script: Script Execution
Platforms:	Linux, macOS, 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

Description:	An adversary may compress and/or encrypt data that is collected prior to exfiltration. Compressing the data can help to obfuscate the collected data and minimize the amount of data sent over the network. Encryption can be used to hide information that is being exfiltrated from detection or make exfiltration less conspicuous upon inspection by a defender.
Tactics:	Collection
Data Sources:	Command: Command Execution, File: File Creation, Process: Process Creation, Script: Script Execution
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

Warning!

Windows Analysis Report WebCompanion.dll

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Configuration

Yara Signatures

Initial Sample

Sigma Signatures

Snort Signatures

Joe Sandbox Signatures

AV Detection

Compliance

Networking

System Summary

Data Obfuscation

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

Anti Debugging

HIPS / PFW / Operating System Protection Evasion

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

URLs from Memory and Binaries

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

Static PE Info

General

Authenticode Signature

Entrypoint Preview

Data Directories

Sections

Resources

Imports

Network Behavior

Statistics

CPU Usage

Memory Usage

Behavior

System Behavior

Analysis Process: loaddll32.exePID: 7340, Parent PID: 3968

General

Chronological Activities

Analysis Process: conhost.exePID: 7348, Parent PID: 7340

General

Chronological Activities

Analysis Process: cmd.exePID: 7428, Parent PID: 7340

General

Chronological Activities

Windows Analysis Report
WebCompanion.dll