njRat PE Executable malware analysis – aeebeaa4a16c

Ctrl + scroll to zoom · drag to pan

Get an AI-generated breakdown of this malware's behaviour, IOCs and recommendations.

AI analysis is available with Essential.

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

1 malicious · 3 files

EXEaeebeaa4a16c8e3bbdad4143e2fab399njRat

Structure

BINResources

Config. Field	Value
Key (AES_256)	d0dYTXhuhuhuhuhuhuhuhuhuhuhu
Pastebin	-huhuhuhu
Certificate	MIIE8jhuhuhuhuhuhuhuhuhuhuhu
ServerSignature	IlYnHdhuhuhuhuhuhuhuhuhuhuhu
Install	fhuhuhuhu
BDOS	fhuhuhuhu
Anti-VM	fhuhuhuhu
Install-Folder	%Aphuhuhuhu
Version	0.huhuhuhu
Hosts	wintehuhuhuhuhuhuhu
Ports	1huhuhuhu
Mutex	Asynchuhuhuhuhuhuhu
Delay	3huhuhuhu
Group	Dehuhuhuhu

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

Unlock with Essential

Name	Value
Module Name	AsyncSrv.exe
Full Name	AsyncSrv.exe
EntryPoint	System.Void AsyncSrv.Program::Main()
Scope Name	AsyncSrv.exe
Scope Type	ModuleDef
Kind	Windows
Runtime Version	v4.0.30319
Tables Header Version	512
WinMD Version	<null>
Assembly Name	AsyncSrv
Assembly Version	1.0.0.0
Assembly Culture	<null>
Has PublicKey	False
PublicKey Token	<null>
Target Framework	.NETFramework,Version=v4.0,Profile=Client
Total Strings	120
Main Method	System.Void AsyncSrv.Program::Main()
Main IL Instruction Count	51
Main IL	ldc.i4.0 <null> stloc.0 <null> br IL_0015: ldloc.0 ldc.i4 1000 call System.Void System.Threading.Thread::Sleep(System.Int32) ldloc.0 <null> ldc.i4.1 <null> add <null> stloc.0 <null> ldloc.0 <null> ldsfld System.String AsyncSrv.Settings::Delay call System.Int32 System.Convert::ToInt32(System.String) blt.s IL_0007: ldc.i4 1000 call System.Boolean AsyncSrv.Settings::InitializeSettings() brtrue IL_0032: nop ldc.i4.0 <null> call System.Void System.Environment::Exit(System.Int32) nop <null> call System.Boolean AsyncSrv.Helper.MutexControl::CreateMutex() brtrue IL_0043: ldsfld System.String AsyncSrv.Settings::Anti ldc.i4.0 <null> call System.Void System.Environment::Exit(System.Int32) ldsfld System.String AsyncSrv.Settings::Anti call System.Boolean System.Convert::ToBoolean(System.String) brfalse IL_0057: ldsfld System.String AsyncSrv.Settings::Install call System.Void AsyncSrv.Helper.Anti_Analysis::RunAntiAnalysis() ldsfld System.String AsyncSrv.Settings::Install call System.Boolean System.Convert::ToBoolean(System.String) brfalse IL_006B: ldsfld System.String AsyncSrv.Settings::BDOS call System.Void AsyncSrv.Install.NormalStartup::Install() ldsfld System.String AsyncSrv.Settings::BDOS call System.Boolean System.Convert::ToBoolean(System.String) brfalse IL_0089: call System.Void AsyncSrv.Helper.Methods::PreventSleep() call System.Boolean AsyncSrv.Helper.Methods::IsAdmin() brfalse IL_0089: call System.Void AsyncSrv.Helper.Methods::PreventSleep() call System.Void AsyncSrv.Helper.ProcessCritical::Set() call System.Void AsyncSrv.Helper.Methods::PreventSleep() leave IL_0099: nop pop <null> leave IL_0099: nop nop <null> call System.Boolean AsyncSrv.Connection.ClientSocket::get_IsConnected() brtrue IL_00AE: leave IL_00B9 call System.Void AsyncSrv.Connection.ClientSocket::Reconnect() call System.Void AsyncSrv.Connection.ClientSocket::InitializeClient() leave IL_00B9: ldc.i4 5000 pop <null> leave IL_00B9: ldc.i4 5000 ldc.i4 5000 call System.Void System.Threading.Thread::Sleep(System.Int32) br.s IL_0099: nop
Module Name	AsyncSrv.exe
Full Name	AsyncSrv.exe
EntryPoint	System.Void AsyncSrv.Program::Main()
Scope Name	AsyncSrv.exe
Scope Type	ModuleDef
Kind	Windows
Runtime Version	v4.0.30319
Tables Header Version	512
WinMD Version	<null>
Assembly Name	AsyncSrv
Assembly Version	1.0.0.0
Assembly Culture	<null>
Has PublicKey	False
PublicKey Token	<null>
Target Framework	.NETFramework,Version=v4.0,Profile=Client
Total Strings	120
Main Method	System.Void AsyncSrv.Program::Main()
Main IL Instruction Count	51
Main IL	ldc.i4.0 <null> stloc.0 <null> br IL_0015: ldloc.0 ldc.i4 1000 call System.Void System.Threading.Thread::Sleep(System.Int32) ldloc.0 <null> ldc.i4.1 <null> add <null> stloc.0 <null> ldloc.0 <null> ldsfld System.String AsyncSrv.Settings::Delay call System.Int32 System.Convert::ToInt32(System.String) blt.s IL_0007: ldc.i4 1000 call System.Boolean AsyncSrv.Settings::InitializeSettings() brtrue IL_0032: nop ldc.i4.0 <null> call System.Void System.Environment::Exit(System.Int32) nop <null> call System.Boolean AsyncSrv.Helper.MutexControl::CreateMutex() brtrue IL_0043: ldsfld System.String AsyncSrv.Settings::Anti ldc.i4.0 <null> call System.Void System.Environment::Exit(System.Int32) ldsfld System.String AsyncSrv.Settings::Anti call System.Boolean System.Convert::ToBoolean(System.String) brfalse IL_0057: ldsfld System.String AsyncSrv.Settings::Install call System.Void AsyncSrv.Helper.Anti_Analysis::RunAntiAnalysis() ldsfld System.String AsyncSrv.Settings::Install call System.Boolean System.Convert::ToBoolean(System.String) brfalse IL_006B: ldsfld System.String AsyncSrv.Settings::BDOS call System.Void AsyncSrv.Install.NormalStartup::Install() ldsfld System.String AsyncSrv.Settings::BDOS call System.Boolean System.Convert::ToBoolean(System.String) brfalse IL_0089: call System.Void AsyncSrv.Helper.Methods::PreventSleep() call System.Boolean AsyncSrv.Helper.Methods::IsAdmin() brfalse IL_0089: call System.Void AsyncSrv.Helper.Methods::PreventSleep() call System.Void AsyncSrv.Helper.ProcessCritical::Set() call System.Void AsyncSrv.Helper.Methods::PreventSleep() leave IL_0099: nop pop <null> leave IL_0099: nop nop <null> call System.Boolean AsyncSrv.Connection.ClientSocket::get_IsConnected() brtrue IL_00AE: leave IL_00B9 call System.Void AsyncSrv.Connection.ClientSocket::Reconnect() call System.Void AsyncSrv.Connection.ClientSocket::InitializeClient() leave IL_00B9: ldc.i4 5000 pop <null> leave IL_00B9: ldc.i4 5000 ldc.i4 5000 call System.Void System.Threading.Thread::Sleep(System.Int32) br.s IL_0099: nop

Key (AES_256) MUTEXmalicious

d0dYTXhuhuhuhuhuhuhuhuhuhuhu

CnC CNCmalicious

wintehuhuhuhuhuhuhu

Ports PORTmalicious

1huhuhuhu

Mutex MUTEXmalicious

Asynchuhuhuhuhuhuhu

Full artefact values (URLs, paths, registry keys, scripts…) are available with Essential.

Unlock with Essential