QuasarRat PE Executable malware analysis – 48de33adfc76

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File

Detection

PeID

.NET executableMicrosoft Visual C# / Basic .NETMicrosoft Visual C# / Basic.NET / MS Visual Basic 2005 - ASL Microsoft Visual C# v7.0 / Basic .NETMicrosoft Visual Studio .NET

Symbol obfuscation

Low

2 malicious · 6 files

EXE48de33adfc768d0771cbce2e8ffc4352QuasarRat

EXE[Rebuild from dump]_0d636ffb.exeQuasarRat

BIN.Net Resources

Config. Field	Value
Conf. AES-Salt	BF-EB-huhuhuhuhuhuhuhuhuhuhu
Conf. AES-Key	wB9FFjhuhuhuhuhuhuhu
Version	1.huhuhuhu
Port
Host	wifilhuhuhuhuhuhuhu
ReconnectDelay	3huhuhuhu
SubDirectory	1WvgEMhuhuhuhuhuhuhu
InstallName	NcFtjbhuhuhuhuhuhuhuhuhuhuhu
Install	Onehuhuhuhu
Startup	Drihuhuhuhu
Mutex	0huhuhuhu
StartupKey	0huhuhuhu
HideFile	CC8HGhuhuhuhuhuhuhu
EnableLogger	Quasahuhuhuhuhuhuhu
Tag	1huhuhuhu
LogDirectory	1huhuhuhu
ServerSignature	wihuhuhuhu
ServerCertificate	Lhuhuhuhu
InstallPath	1huhuhuhu
LogsPath	1huhuhuhu
UnattendedMod	0huhuhuhu

We extracted this malware's full configuration (C2, credentials, campaign IDs…).

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Name	Value
Module Name	Client.exe
Full Name	Client.exe
EntryPoint	System.Void xClient.Program::Main(System.String[])
Scope Name	Client.exe
Scope Type	ModuleDef
Kind	Windows
Runtime Version	v4.0.30319
Tables Header Version	512
WinMD Version	<null>
Assembly Name	Client
Assembly Version	1.3.0.0
Assembly Culture	<null>
Has PublicKey	False
PublicKey Token	<null>
Target Framework	.NETFramework,Version=v4.0,Profile=Client
Total Strings	1062
Main Method	System.Void xClient.Program::Main(System.String[])
Main IL Instruction Count	19
Main IL	call System.Void System.Windows.Forms.Application::EnableVisualStyles() ldc.i4.0 <null> call System.Void System.Windows.Forms.Application::SetCompatibleTextRenderingDefault(System.Boolean) call System.AppDomain System.AppDomain::get_CurrentDomain() ldnull <null> ldftn System.Void xClient.Program::HandleUnhandledException(System.Object,System.UnhandledExceptionEventArgs) newobj System.Void System.UnhandledExceptionEventHandler::.ctor(System.Object,System.IntPtr) callvirt System.Void System.AppDomain::add_UnhandledException(System.UnhandledExceptionEventHandler) call System.Boolean xClient.Config.Settings::Initialize() brfalse.s IL_0040: call System.Void xClient.Program::Cleanup() call System.Boolean xClient.Program::Initialize() brfalse.s IL_0040: call System.Void xClient.Program::Cleanup() call System.Boolean xClient.Core.Networking.QuasarClient::get_Exiting() brtrue.s IL_0040: call System.Void xClient.Program::Cleanup() ldsfld xClient.Core.Networking.QuasarClient xClient.Program::ConnectClient callvirt System.Void xClient.Core.Networking.QuasarClient::Connect() call System.Void xClient.Program::Cleanup() call System.Void xClient.Program::Exit() ret <null>
Module Name	Client.exe
Full Name	Client.exe
EntryPoint	System.Void xClient.Program::Main(System.String[])
Scope Name	Client.exe
Scope Type	ModuleDef
Kind	Windows
Runtime Version	v4.0.30319
Tables Header Version	512
WinMD Version	<null>
Assembly Name	Client
Assembly Version	1.3.0.0
Assembly Culture	<null>
Has PublicKey	False
PublicKey Token	<null>
Target Framework	.NETFramework,Version=v4.0,Profile=Client
Total Strings	1062
Main Method	System.Void xClient.Program::Main(System.String[])
Main IL Instruction Count	19
Main IL	call System.Void System.Windows.Forms.Application::EnableVisualStyles() ldc.i4.0 <null> call System.Void System.Windows.Forms.Application::SetCompatibleTextRenderingDefault(System.Boolean) call System.AppDomain System.AppDomain::get_CurrentDomain() ldnull <null> ldftn System.Void xClient.Program::HandleUnhandledException(System.Object,System.UnhandledExceptionEventArgs) newobj System.Void System.UnhandledExceptionEventHandler::.ctor(System.Object,System.IntPtr) callvirt System.Void System.AppDomain::add_UnhandledException(System.UnhandledExceptionEventHandler) call System.Boolean xClient.Config.Settings::Initialize() brfalse.s IL_0040: call System.Void xClient.Program::Cleanup() call System.Boolean xClient.Program::Initialize() brfalse.s IL_0040: call System.Void xClient.Program::Cleanup() call System.Boolean xClient.Core.Networking.QuasarClient::get_Exiting() brtrue.s IL_0040: call System.Void xClient.Program::Cleanup() ldsfld xClient.Core.Networking.QuasarClient xClient.Program::ConnectClient callvirt System.Void xClient.Core.Networking.QuasarClient::Connect() call System.Void xClient.Program::Cleanup() call System.Void xClient.Program::Exit() ret <null>

CnC CNCmalicious

wifilhuhuhuhuhuhuhu

Port PORTmalicious

PE Layout UNKNWOWNsuspect

Memoryhuhuhuhuhuhuhuhuhuhuhu

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