hollow[.]exe | Triage™

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General

Target
hollow.exe
Size 426KB
Sample261002-nhcx2ayfph
SHA256 43ff868bc236372f112ff934c5cfb630a9c9b04afc8a032f610ff03844b07b55
MD5 adf1d957ffdddbec85a5d93550ddab40
SHA1 988e024a72ded9c8eb10fa67a03b5db79128b617
SHA512 2faed40e72a795871ccf390863c6736d04bda0e62c593ce6ad84bed52d9429313a5ba91803cff212cec8abc7ae6de8e0a9efc51bfb473c199f8bfd4e60fa93a6
SSDEEP 6144:TVv3Bi/1WSMJ0tdcz8E7I8G/i3JNVpRCrGgGzyMU3SfKgi2NO8EJP5L5Vpt7:JBi/1WNXI8G0VpSlGzykg24
TLSH
T116943C77A7A384F8C197C174AAC3D6B5A031F8080234BA6F1795DF313F16A605FADA64
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
hollow.exe

File Explorer

hollow.exe

.exe 426KB

hollow.exe

IMPHASH 7cfb1996f311787bad1c7b864f4582b2
SHA256 43ff868bc236372f112ff934c5cfb630a9c9b04afc8a032f610ff03844b07b55
MD5 adf1d957ffdddbec85a5d93550ddab40
SHA1 988e024a72ded9c8eb10fa67a03b5db79128b617
SHA512 2faed40e72a795871ccf390863c6736d04bda0e62c593ce6ad84bed52d9429313a5ba91803cff212cec8abc7ae6de8e0a9efc51bfb473c199f8bfd4e60fa93a6
SSDEEP 6144:TVv3Bi/1WSMJ0tdcz8E7I8G/i3JNVpRCrGgGzyMU3SfKgi2NO8EJP5L5Vpt7:JBi/1WNXI8G0VpSlGzykg24
TLSH
T116943C77A7A384F8C197C174AAC3D6B5A031F8080234BA6F1795DF313F16A605FADA64
MD5 SHA1 SHA512 SSDEEP TLSH

windows:4 windows x64 arch:x64

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

4144

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LINE_NUMS_STRIPPED IMAGE_FILE_LOCAL_SYMS_STRIPPED IMAGE_FILE_LARGE_ADDRESS_AWARE IMAGE_FILE_DEBUG_STRIPPED

PDB paths

advapi32

AdjustTokenPrivileges GetUserNameA LookupPrivilegeValueA OpenProcessToken RegCloseKey RegCreateKeyExA RegDeleteTreeA RegDeleteValueA RegEnumKeyA RegOpenKeyExA RegQueryValueExA RegSetValueExA

gdi32

CreateCompatibleDC CreateDIBSection DeleteDC DeleteObject GdiFlush GetObjectA SelectObject SetBrushOrgEx SetStretchBltMode StretchBlt

gdiplus

GdipAlloc GdipCloneBitmapArea GdipCloneImage GdipCreateBitmapFromScan0 GdipDisposeImage GdipFree GdipGetImageEncoders GdipGetImageEncodersSize GdipSaveImageToStream GdiplusStartup

kernel32

CloseHandle CreateEventA CreateFileA CreateMutexA CreateProcessA CreateSemaphoreA CreateThread DeleteCriticalSection DeleteFileA DuplicateHandle EnterCriticalSection ExitProcess FileTimeToSystemTime FormatMessageA FreeLibrary GetComputerNameA GetCurrentProcess GetCurrentProcessId GetCurrentThread GetCurrentThreadId GetDiskFreeSpaceExA GetExitCodeProcess GetFileSizeEx GetLastError GetLogicalDriveStringsA GetModuleFileNameA GetModuleHandleA GetNativeSystemInfo GetProcAddress GetProcessAffinityMask GetProcessHeap GetProcessTimes GetSystemTimeAdjustment GetSystemTimeAsFileTime GetThreadContext GetThreadPriority GetThreadTimes GetTickCount GetTickCount64 GetVolumeInformationA GetWindowsDirectoryA GlobalMemoryStatusEx HeapAlloc HeapFree InitializeCriticalSection LeaveCriticalSection LoadLibraryA LocalFree MultiByteToWideChar OpenProcess OutputDebugStringA QueryPerformanceCounter QueryPerformanceFrequency RaiseException ReadFile ReleaseSemaphore ResetEvent ResumeThread RtlCaptureContext RtlLookupFunctionEntry RtlUnwindEx RtlVirtualUnwind SetEvent SetLastError SetProcessAffinityMask SetSystemTime SetThreadContext SetThreadPriority SetUnhandledExceptionFilter Sleep SuspendThread TerminateProcess TlsAlloc TlsFree TlsGetValue TlsSetValue TryEnterCriticalSection VirtualFree VirtualProtect VirtualQuery WaitForMultipleObjects WaitForSingleObject WideCharToMultiByte

api-ms-win-crt-convert-l1-1-0

_wtoi atoi mbrtowc mbsrtowcs strtol strtoll strtoul strtoull wcrtomb

api-ms-win-crt-environment-l1-1-0

__p__environ getenv

api-ms-win-crt-heap-l1-1-0

_set_new_mode calloc free malloc realloc

api-ms-win-crt-locale-l1-1-0

_configthreadlocale localeconv

api-ms-win-crt-math-l1-1-0

__setusermatherr

api-ms-win-crt-private-l1-1-0

__C_specific_handler __intrinsic_setjmp longjmp memchr memcmp memcpy memmove strchr

api-ms-win-crt-runtime-l1-1-0

__p___argc __p___argv _assert _beginthreadex _cexit _configure_narrow_argv _crt_atexit _endthreadex _errno _exit _initialize_narrow_environment _set_app_type _initterm _initterm_e _register_thread_local_exe_atexit_callback _set_errno _set_invalid_parameter_handler abort exit signal strerror

api-ms-win-crt-stdio-l1-1-0

__acrt_iob_func __p__commode __p__fmode __stdio_common_vfprintf __stdio_common_vsprintf _fileno _read _setmode fflush fputc fputs fwrite getc setvbuf ungetc

api-ms-win-crt-string-l1-1-0

_strdup isdigit isspace isxdigit mbrlen memset strcmp strcpy strlen strncmp strncpy strnlen tolower wcslen wcsnlen

api-ms-win-crt-time-l1-1-0

_time64

api-ms-win-crt-utility-l1-1-0

rand rand_s srand

ole32

CoCreateInstance CoInitialize CreateStreamOnHGlobal

shell32

IsUserAnAdmin SHGetFolderPathA ShellExecuteA ShellExecuteExA

user32

EnumDisplayMonitors ExitWindowsEx GetCursorInfo GetDC GetForegroundWindow GetSystemMetrics GetWindowTextA ReleaseDC SendInput keybd_event mouse_event

winhttp

WinHttpAddRequestHeaders WinHttpCloseHandle WinHttpConnect WinHttpOpen WinHttpOpenRequest WinHttpQueryDataAvailable WinHttpQueryHeaders WinHttpReadData WinHttpReceiveResponse WinHttpSendRequest WinHttpSetTimeouts

Name

.text

Size

319KB

Virtual Size

318KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.data

Size

11KB

Virtual Size

11KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rdata

Size

41KB

Virtual Size

40KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.eh_fram

Size

512B

Virtual Size

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

18KB

Virtual Size

17KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.xdata

Size

21KB

Virtual Size

20KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.bss

Size

Virtual Size

3KB

Characteristics

IMAGE_SCN_CNT_UNINITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.idata

Size

9KB

Virtual Size

9KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.tls

Size

512B

Virtual Size

16B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

2KB

Virtual Size

2KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

1KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

File Explorer

hollow.exe

advapi32

gdi32

gdiplus

kernel32

api-ms-win-crt-convert-l1-1-0

api-ms-win-crt-environment-l1-1-0

api-ms-win-crt-heap-l1-1-0

api-ms-win-crt-locale-l1-1-0

api-ms-win-crt-math-l1-1-0

api-ms-win-crt-private-l1-1-0

api-ms-win-crt-runtime-l1-1-0

api-ms-win-crt-stdio-l1-1-0

api-ms-win-crt-string-l1-1-0

api-ms-win-crt-time-l1-1-0

api-ms-win-crt-utility-l1-1-0

ole32

shell32

user32

winhttp

generic