Bloxstrap[.]exe

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General

Target

Bloxstrap.exe
Size

10.1MB
MD5

d0c8b56f2e174b7fbb5c2f65e42cd8f5
SHA1

b778dc066c25ab8d6f69b7dc8420e4ea0c3d0238
SHA256

f91334d3b9a92bfdcbd824579efd3172f6bad40e94918439e198fbc791b59899
SHA512

d02834698c5249cc483c035bae3c20a62a7afac7a661fd8a832ef647cf71c2ae45aa48f74de2aaaebe40947b7d0aa94ce7030945039be782c12ce96ecc67f98c
SSDEEP

98304:xHd5D3Pd5DkjTsed5D+FLpO1vGWD3xRDOYoHwfLk3vSmaR0+Mc4AN0edaAHDfys4:x/EsvyvGQRDObAbN0T

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
Bloxstrap.exe

Files

Bloxstrap.exe
.exe windows:6 windows x64 arch:x64

Password: infected

a8308de57fce070f4cb88c7f43bf4b27

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
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_LARGE_ADDRESS_AWARE

PDB Paths

D:\a\_work\1\s\artifacts\obj\win-x64.Release\corehost\apphost\standalone\apphost.pdb

Imports

kernel32

FindNextFileW
GetCurrentProcess
GetModuleHandleExW
GetModuleFileNameW
LeaveCriticalSection
GetEnvironmentVariableW
FindClose
MultiByteToWideChar
GetLastError
GetFileAttributesExW
GetFullPathNameW
GetProcAddress
DeleteCriticalSection
WideCharToMultiByte
IsWow64Process
LoadLibraryExW
FreeLibrary
TlsFree
TlsSetValue
TlsGetValue
TlsAlloc
EnterCriticalSection
FindFirstFileExW
OutputDebugStringW
LoadLibraryA
GetModuleHandleW
InitializeCriticalSectionAndSpinCount
SetLastError
RaiseException
RtlPcToFileHeader
RtlUnwindEx
InitializeSListHead
GetCurrentProcessId
IsDebuggerPresent
IsProcessorFeaturePresent
TerminateProcess
SetUnhandledExceptionFilter
UnhandledExceptionFilter
RtlVirtualUnwind
RtlLookupFunctionEntry
RtlCaptureContext
GetStringTypeW
SwitchToThread
GetCurrentThreadId
InitializeCriticalSectionEx
EncodePointer
DecodePointer
LCMapStringEx
QueryPerformanceCounter
GetSystemTimeAsFileTime

user32

MessageBoxW

shell32

ShellExecuteW

advapi32

RegOpenKeyExW
RegGetValueW
DeregisterEventSource
RegisterEventSourceW
ReportEventW
RegCloseKey

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

__p___argc
__p___wargv
_initterm
_get_initial_wide_environment
_initialize_wide_environment
_errno
_configure_wide_argv
_invalid_parameter_noinfo_noreturn
_set_app_type
_seh_filter_exe
_c_exit
exit
_cexit
_register_thread_local_exe_atexit_callback
_crt_atexit
_exit
_initterm_e
abort
_register_onexit_function
_initialize_onexit_table
terminate

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

__p__commode
__stdio_common_vsprintf_s
setvbuf
_wfopen
_set_fmode
__stdio_common_vswprintf
__acrt_iob_func
fputwc
fputws
__stdio_common_vfwprintf
fflush

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

_callnewh
_set_new_mode
free
malloc
calloc

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

wcsnlen
strcpy_s
_wcsdup
strcspn
wcsncmp
toupper

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

_wtoi
wcstoul

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

__pctype_func
_unlock_locales
localeconv
_lock_locales
___lc_codepage_func
___mb_cur_max_func
_configthreadlocale
setlocale
___lc_locale_name_func

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

__setusermatherr
frexp

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

_gmtime64_s
wcsftime
_time64

Sections

.text
Size: 97KB - Virtual size: 97KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 38KB - Virtual size: 37KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 2KB - Virtual size: 6KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 5KB - Virtual size: 5KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

_RDATA
Size: 512B - Virtual size: 244B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 1024B - Virtual size: 792B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

.rsrc
Size: 104KB - Virtual size: 104KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

Password: infected

a8308de57fce070f4cb88c7f43bf4b27

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

kernel32

user32

shell32

advapi32

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

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

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

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

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

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

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

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

Sections

.text Size: 97KB - Virtual size: 97KB

.rdata Size: 38KB - Virtual size: 37KB

.data Size: 2KB - Virtual size: 6KB

.pdata Size: 5KB - Virtual size: 5KB

_RDATA Size: 512B - Virtual size: 244B

.reloc Size: 1024B - Virtual size: 792B

.rsrc Size: 104KB - Virtual size: 104KB

.text
Size: 97KB - Virtual size: 97KB

.rdata
Size: 38KB - Virtual size: 37KB

.data
Size: 2KB - Virtual size: 6KB

.pdata
Size: 5KB - Virtual size: 5KB

_RDATA
Size: 512B - Virtual size: 244B

.reloc
Size: 1024B - Virtual size: 792B

.rsrc
Size: 104KB - Virtual size: 104KB