dcrat | DCRatBuild121212[.]exe

General

Target
DCRatBuild121212.exe
Size 2.9MB
Sample260715-nnd3aaev71
SHA256 2e8b7a738ae3982c77f5751b4be096be2841167625190c245b7fb1858cd4ccd5
MD5 9fe596f4a179c407569978a18985a0c1
SHA1 ca42f33c912302e49fa3542f7978962f947419f3
SHA512 77d0d7f7b0365091dc6152a3b69d03a98d3bd24ce958a063f81eae807a08a3d1ca13e81393bf51abf29a18c925d86f49eedd40a6461eea270d678393d7d6bdea
SSDEEP 24576:zTbBv5rUfzpCTn72tmNlgEJMA+uCw7sULqP3NJV08P5Np6JZlP6+cO7TT63:tBA8Tn72tm3mA+IUP0lL2
TLSH
T1D8E5A12439EE102DF1B3BFB59BD47596DA6EBE73370B544E1090238A4633A41DED123A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

rat infostealer dcrat

Malware Config

Signatures

Family: DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat

DCRat payload 1 IoCs

rat

resource	yara_rule
sample	family_dcrat_v2

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
DCRatBuild121212.exe

File Explorer

DCRatBuild121212.exe

.exe 2.9MB

DCRatBuild121212.exe

IMPHASH 12e12319f1029ec4f8fcbed7e82df162
SHA256 2e8b7a738ae3982c77f5751b4be096be2841167625190c245b7fb1858cd4ccd5
MD5 9fe596f4a179c407569978a18985a0c1
SHA1 ca42f33c912302e49fa3542f7978962f947419f3
SHA512 77d0d7f7b0365091dc6152a3b69d03a98d3bd24ce958a063f81eae807a08a3d1ca13e81393bf51abf29a18c925d86f49eedd40a6461eea270d678393d7d6bdea
SSDEEP 24576:zTbBv5rUfzpCTn72tmNlgEJMA+uCw7sULqP3NJV08P5Np6JZlP6+cO7TT63:tBA8Tn72tm3mA+IUP0lL2
TLSH
T1D8E5A12439EE102DF1B3BFB59BD47596DA6EBE73370B544E1090238A4633A41DED123A
MD5 SHA1 SHA512 SSDEEP TLSH

windows:5 windows x86 arch:x86

DCRat payload

rat
Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

1

Major OS version

5

Entry point

128304

Magic Number

267

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE IMAGE_DLLCHARACTERISTICS_NX_COMPAT IMAGE_DLLCHARACTERISTICS_GUARD_CF IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_32BIT_MACHINE

PDB paths

D:\Projects\WinRAR\sfx\build\sfxrar32\Release\sfxrar.pdb

kernel32

GetLastError SetLastError FormatMessageW GetCurrentProcess DeviceIoControl SetFileTime CloseHandle CreateDirectoryW RemoveDirectoryW CreateFileW DeleteFileW CreateHardLinkW GetShortPathNameW GetLongPathNameW MoveFileW GetFileType GetStdHandle WriteFile ReadFile FlushFileBuffers SetEndOfFile SetFilePointer SetFileAttributesW GetFileAttributesW FindClose FindFirstFileW FindNextFileW InterlockedDecrement GetVersionExW GetCurrentDirectoryW GetFullPathNameW FoldStringW GetModuleFileNameW GetModuleHandleW FindResourceW FreeLibrary GetProcAddress GetCurrentProcessId ExitProcess SetThreadExecutionState Sleep LoadLibraryW GetSystemDirectoryW CompareStringW AllocConsole FreeConsole AttachConsole WriteConsoleW GetProcessAffinityMask CreateThread SetThreadPriority InitializeCriticalSection EnterCriticalSection LeaveCriticalSection DeleteCriticalSection SetEvent ResetEvent ReleaseSemaphore WaitForSingleObject CreateEventW CreateSemaphoreW GetSystemTime SystemTimeToTzSpecificLocalTime TzSpecificLocalTimeToSystemTime SystemTimeToFileTime FileTimeToLocalFileTime LocalFileTimeToFileTime FileTimeToSystemTime GetCPInfo IsDBCSLeadByte MultiByteToWideChar WideCharToMultiByte GlobalAlloc LockResource GlobalLock GlobalUnlock GlobalFree LoadResource SizeofResource SetCurrentDirectoryW GetExitCodeProcess GetLocalTime GetTickCount MapViewOfFile UnmapViewOfFile CreateFileMappingW OpenFileMappingW GetCommandLineW SetEnvironmentVariableW ExpandEnvironmentStringsW GetTempPathW MoveFileExW GetLocaleInfoW GetTimeFormatW GetDateFormatW GetNumberFormatW DecodePointer SetFilePointerEx GetConsoleMode GetConsoleCP HeapSize SetStdHandle GetProcessHeap FreeEnvironmentStringsW GetEnvironmentStringsW GetCommandLineA GetOEMCP RaiseException GetSystemInfo VirtualProtect VirtualQuery LoadLibraryExA IsProcessorFeaturePresent IsDebuggerPresent UnhandledExceptionFilter SetUnhandledExceptionFilter GetStartupInfoW QueryPerformanceCounter GetCurrentThreadId GetSystemTimeAsFileTime InitializeSListHead TerminateProcess LocalFree RtlUnwind EncodePointer InitializeCriticalSectionAndSpinCount TlsAlloc TlsGetValue TlsSetValue TlsFree LoadLibraryExW QueryPerformanceFrequency GetModuleHandleExW GetModuleFileNameA GetACP HeapFree HeapAlloc HeapReAlloc GetStringTypeW LCMapStringW FindFirstFileExA FindNextFileA IsValidCodePage

oleaut32

SysAllocString SysFreeString VariantClear

gdiplus

GdipAlloc GdipDisposeImage GdipCloneImage GdipCreateBitmapFromStream GdipCreateBitmapFromStreamICM GdipCreateHBITMAPFromBitmap GdiplusStartup GdiplusShutdown GdipFree

Name

.text

Size

199KB

Virtual Size

198KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

44KB

Virtual Size

43KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

4KB

Virtual Size

145KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.didat

Size

512B

Virtual Size

400B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

282KB

Virtual Size

282KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

9KB

Virtual Size

8KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

File Explorer

DCRatBuild121212.exe

kernel32

oleaut32

gdiplus

generic