QuasarRat PE Executable malware analysis – 0752295912d2

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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

Medium

2 malicious · 8 files

EXE0752295912d2235966579c681a276672AsyncRAT

EXE[Rebuild from dump]_dfaa940f.exeAsyncRAT

BIN.Net Resources

Config. Field	Value
Conf. AES-Salt	BF-EB-huhuhuhuhuhuhuhuhuhuhu
Conf. AES-Key	D2973Fhuhuhuhuhuhuhuhuhuhuhu
Version	1huhuhuhu
Port	4huhuhuhu
Host	127huhuhuhu
ReconnectDelay	3huhuhuhu
Key	Suhuhuhuhu
SubDirectory	Clihuhuhuhu
InstallName	0huhuhuhu
Install	0huhuhuhu
Startup	b3f16bhuhuhuhuhuhuhuhuhuhuhu
Mutex	Quasahuhuhuhuhuhuhu
StartupKey	0huhuhuhu
HideFile	0huhuhuhu
EnableLogger	AFGhuhuhuhu
EncryptionKey	Lhuhuhuhu

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

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Config. Field	Value
Key (AES_256)	-huhuhuhu
Pastebin	-huhuhuhu
ServerSignature	/DvBekhuhuhuhuhuhuhuhuhuhuhu
Install File	Sbihuhuhuhu
Mutex	cmdvhuhuhuhu
Group	cmdvhuhuhuhu

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

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Name	Value
Module Name	Client
Full Name	Client
EntryPoint	System.Void gptffgcdehxhguzclcmn.쏊襩篑軙ᜟ챴ᭌ뚖鼠ꑯ豩䨷ꂽȐ鶙譆罥::Main(System.String[])
Scope Name	Client
Scope Type	ModuleDef
Kind	Windows
Runtime Version	v4.0.30319
Tables Header Version	512
WinMD Version	<null>
Assembly Name	Client
Assembly Version	1.7.1.0
Assembly Culture	<null>
Has PublicKey	False
PublicKey Token	<null>
Target Framework	.NETFramework,Version=v4.8
Total Strings	1957
Main Method	System.Void gptffgcdehxhguzclcmn.쏊襩篑軙ᜟ챴ᭌ뚖鼠ꑯ豩䨷ꂽȐ鶙譆罥::Main(System.String[])
Main IL Instruction Count	20
Main IL	ldc.i4 3072 call System.Void System.Net.ServicePointManager::set_SecurityProtocol(System.Net.SecurityProtocolType) ldc.i4.2 <null> call System.Void System.Windows.Forms.Application::SetUnhandledExceptionMode(System.Windows.Forms.UnhandledExceptionMode) ldnull <null> ldftn System.Void gptffgcdehxhguzclcmn.쏊襩篑軙ᜟ챴ᭌ뚖鼠ꑯ豩䨷ꂽȐ鶙譆罥::ଖ㉹쯊⦀⟥짿杙遀ꦒ⏓㽽들₋桦閸蒀耢(System.Object,System.Threading.ThreadExceptionEventArgs) newobj System.Void System.Threading.ThreadExceptionEventHandler::.ctor(System.Object,System.IntPtr) call System.Void System.Windows.Forms.Application::add_ThreadException(System.Threading.ThreadExceptionEventHandler) call System.AppDomain System.AppDomain::get_CurrentDomain() ldnull <null> ldftn System.Void gptffgcdehxhguzclcmn.쏊襩篑軙ᜟ챴ᭌ뚖鼠ꑯ豩䨷ꂽȐ鶙譆罥::�湓ᡶ갣삂粬㥄泥ᙌ詵뢼㤑梶锁珖煪㲙禮(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.Void System.Windows.Forms.Application::EnableVisualStyles() ldc.i4.0 <null> call System.Void System.Windows.Forms.Application::SetCompatibleTextRenderingDefault(System.Boolean) call System.Void gptffgcdehxhguzclcmn.쏊襩篑軙ᜟ챴ᭌ뚖鼠ꑯ豩䨷ꂽȐ鶙譆罥::蜽䆢ዜ䪑椇莯↭�揗麝嚊▛쓡瘻僃钫鱅ᾶ() newobj System.Void gptffgcdehxhguzclcmn.⡈ᑍ趖躉ꦁ鏢论�⭐ੴ劦ꚳ傷㑴൞ᏺ쨻橸ㄩ::.ctor() call System.Void System.Windows.Forms.Application::Run(System.Windows.Forms.Form) ret <null>
Module Name	Client
Full Name	Client
EntryPoint	System.Void gptffgcdehxhguzclcmn.쏊襩篑軙ᜟ챴ᭌ뚖鼠ꑯ豩䨷ꂽȐ鶙譆罥::Main(System.String[])
Scope Name	Client
Scope Type	ModuleDef
Kind	Windows
Runtime Version	v4.0.30319
Tables Header Version	512
WinMD Version	<null>
Assembly Name	Client
Assembly Version	1.7.1.0
Assembly Culture	<null>
Has PublicKey	False
PublicKey Token	<null>
Target Framework	.NETFramework,Version=v4.8
Total Strings	1957
Main Method	System.Void gptffgcdehxhguzclcmn.쏊襩篑軙ᜟ챴ᭌ뚖鼠ꑯ豩䨷ꂽȐ鶙譆罥::Main(System.String[])
Main IL Instruction Count	20
Main IL	ldc.i4 3072 call System.Void System.Net.ServicePointManager::set_SecurityProtocol(System.Net.SecurityProtocolType) ldc.i4.2 <null> call System.Void System.Windows.Forms.Application::SetUnhandledExceptionMode(System.Windows.Forms.UnhandledExceptionMode) ldnull <null> ldftn System.Void gptffgcdehxhguzclcmn.쏊襩篑軙ᜟ챴ᭌ뚖鼠ꑯ豩䨷ꂽȐ鶙譆罥::ଖ㉹쯊⦀⟥짿杙遀ꦒ⏓㽽들₋桦閸蒀耢(System.Object,System.Threading.ThreadExceptionEventArgs) newobj System.Void System.Threading.ThreadExceptionEventHandler::.ctor(System.Object,System.IntPtr) call System.Void System.Windows.Forms.Application::add_ThreadException(System.Threading.ThreadExceptionEventHandler) call System.AppDomain System.AppDomain::get_CurrentDomain() ldnull <null> ldftn System.Void gptffgcdehxhguzclcmn.쏊襩篑軙ᜟ챴ᭌ뚖鼠ꑯ豩䨷ꂽȐ鶙譆罥::�湓ᡶ갣삂粬㥄泥ᙌ詵뢼㤑梶锁珖煪㲙禮(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.Void System.Windows.Forms.Application::EnableVisualStyles() ldc.i4.0 <null> call System.Void System.Windows.Forms.Application::SetCompatibleTextRenderingDefault(System.Boolean) call System.Void gptffgcdehxhguzclcmn.쏊襩篑軙ᜟ챴ᭌ뚖鼠ꑯ豩䨷ꂽȐ鶙譆罥::蜽䆢ዜ䪑椇莯↭�揗麝嚊▛쓡瘻僃钫鱅ᾶ() newobj System.Void gptffgcdehxhguzclcmn.⡈ᑍ趖躉ꦁ鏢论�⭐ੴ劦ꚳ傷㑴൞ᏺ쨻橸ㄩ::.ctor() call System.Void System.Windows.Forms.Application::Run(System.Windows.Forms.Form) ret <null>

CnC CNCmalicious

127huhuhuhu

Port PORTmalicious

4huhuhuhu

Key (AES_256) MUTEXmalicious

-huhuhuhu

Mutex MUTEXmalicious

cmdvhuhuhuhu

PE Layout UNKNWOWNsuspect

Memoryhuhuhuhuhuhuhuhuhuhuhu

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