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Windows Analysis Report

Overview

General Information

Analysis ID:	1523772
Infos:

Detection

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

Signatures

Sigma detected: Dot net compiler compiles file from suspicious location

Compiles C# or VB.Net code

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)

Sigma detected: Dynamic .NET Compilation Via Csc.EXE

Classification

Process Tree

System is w10x64

cmd.exe (PID: 7588 cmdline: cmd /C ""C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline"" MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B)

conhost.exe (PID: 7628 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: 0D698AF330FD17BEE3BF90011D49251D)

csc.exe (PID: 7672 cmdline: "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline" MD5: F65B029562077B648A6A5F6A1AA76A66)

cleanup

Sigma Signatures

Sigma detected: Dynamic .NET Compilation Via Csc.EXE

Source: Process started

Author: Florian Roth (Nextron Systems), X__Junior (Nextron Systems): Data: Command: "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline", CommandLine: "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline", CommandLine|base64offset|contains: zw, Image: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe, NewProcessName: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe, OriginalFileName: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe, ParentCommandLine: cmd /C ""C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline"", ParentImage: C:\Windows\SysWOW64\cmd.exe, ParentProcessId: 7588, ParentProcessName: cmd.exe, ProcessCommandLine: "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline", ProcessId: 7672, ProcessName: csc.exe

Data Obfuscation

Sigma detected: Dot net compiler compiles file from suspicious location

Source: Process started

Author: Joe Security: Data: Command: cmd /C ""C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline"", CommandLine: cmd /C ""C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline"", CommandLine|base64offset|contains: rg, Image: C:\Windows\SysWOW64\cmd.exe, NewProcessName: C:\Windows\SysWOW64\cmd.exe, OriginalFileName: C:\Windows\SysWOW64\cmd.exe, ParentCommandLine: , ParentImage: , ParentProcessId: 744, ProcessCommandLine: cmd /C ""C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline"", ProcessId: 7588, ProcessName: cmd.exe

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

Source: classification engine

Classification label: sus22.expl.win@4/0@0/0

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

Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:7628:120:WilError_03

Source: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe

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

Jump to behavior

Source: unknown	Process created: C:\Windows\SysWOW64\cmd.exe cmd /C ""C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline""
Source: C:\Windows\SysWOW64\cmd.exe	Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\SysWOW64\cmd.exe	Process created: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline"
Source: C:\Windows\SysWOW64\cmd.exe	Process created: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline"	Jump to behavior

Source: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe	Section loaded: vcruntime140_clr0400.dll	Jump to behavior
Source: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe	Section loaded: ucrtbase_clr0400.dll	Jump to behavior
Source: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe	Section loaded: ucrtbase_clr0400.dll	Jump to behavior
Source: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe	Section loaded: kernel.appcore.dll	Jump to behavior

Source: C:\Windows\SysWOW64\cmd.exe	Process created: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline"
Source: C:\Windows\SysWOW64\cmd.exe	Process created: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline"			Jump to behavior

Source: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.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: 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\Microsoft.NET\Framework64\v4.0.30319\csc.exe "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline"

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	Windows Management Instrumentation	1 DLL Side-Loading	11 Process Injection	11 Process Injection	OS Credential Dumping	1 System Information Discovery	Remote Services	Data from Local System	Data Obfuscation	Exfiltration Over Other Network Medium	Abuse Accessibility Features
Credentials	Domains	Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	1 DLL Side-Loading	1 DLL Side-Loading	LSASS Memory	Application Window Discovery	Remote Desktop Protocol	Data from Removable Media	Junk Data	Exfiltration Over Bluetooth	Network Denial of Service

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:	41.0.0 Charoite
Analysis ID:	1523772
Start date and time:	2024-10-02 01:46:58 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 1m 22s
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	defaultwindowscmdlinecookbook.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:	3
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
Detection:	SUS
Classification:	sus22.expl.win@4/0@0/0
EGA Information:	Failed
HCA Information:	Successful, ratio: 100% Number of executed functions: 0 Number of non-executed functions: 0
Cookbook Comments:	Stop behavior analysis, all processes terminated

Warnings

Not all processes where analyzed, report is missing behavior information

Target ID:	0
Start time:	19:47:46
Start date:	01/10/2024
Path:	C:\Windows\SysWOW64\cmd.exe
Wow64 process (32bit):	true
Commandline:	cmd /C ""C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline""
Imagebase:	0x240000
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:	1
Start time:	19:47:46
Start date:	01/10/2024
Path:	C:\Windows\System32\conhost.exe
Wow64 process (32bit):	false
Commandline:	C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Imagebase:	0x7ff7699e0000
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:	2
Start time:	19:47:46
Start date:	01/10/2024
Path:	C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
Wow64 process (32bit):	false
Commandline:	"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user1\AppData\Local\Temp\5adbfgrl.cmdline"
Imagebase:	0x7ff665c60000
File size:	2'759'232 bytes
MD5 hash:	F65B029562077B648A6A5F6A1AA76A66
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	moderate
Has exited:	true

Show Windows behavior

Chronological Activities

Disassembly

⊘No disassembly

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:	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

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Configuration

Yara Signatures

Sigma Signatures

System Summary

Data Obfuscation

Suricata Signatures

Joe Sandbox Signatures

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

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

Network Behavior

Statistics

CPU Usage

Memory Usage

Behavior

System Behavior

Analysis Process: cmd.exePID: 7588, Parent PID: 744

General

Chronological Activities

Analysis Process: conhost.exePID: 7628, Parent PID: 7588

General

Chronological Activities

Analysis Process: csc.exePID: 7672, Parent PID: 7588

General

Chronological Activities

Disassembly