calc[.]exe | Triage

Sharing

Copy URL Twitter E-mail

General

Target

calc.exe
Size

20.7MB
MD5

b795d516da907bfa3436c0d0082029ba
SHA1

7bbe18c411480137821405b70a445a62c82ac411
SHA256

96319fdb5627c8eaa5697b458864b78fbc5567380c0fdceabe2db44140270c89
SHA512

4c88c012975c1fa1b7d8d159b47de7f78e2a6e1468d5b880db0f695e5cc4df5142eb265401b77101ac0b4584d3ae77076b03f3350c8253d60de13ec5f71683c9
SSDEEP

393216:fE5le7IKmkgrpdZXrVzG9Sdnj68n5AYfgNRaevcozUSv:fQ/HMKFgNRa2cW

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
calc.exe

Files

calc.exe
.exe windows:6 windows x64 arch:x64

21c545b801a2a9bdada8a6dcb7cc0fc3

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\cli\apphost\static\Release\singlefilehost.pdb

Imports

kernel32

FindNextFileW
GetCurrentProcess
GetModuleHandleExW
GetModuleFileNameW
LeaveCriticalSection
InitializeCriticalSection
GetEnvironmentVariableW
GetTempPathW
FindClose
CreateFileW
MultiByteToWideChar
GetLastError
GetFileAttributesExW
LoadLibraryA
CloseHandle
GetCurrentDirectoryW
GetProcAddress
DeleteCriticalSection
WideCharToMultiByte
CreateFileMappingW
MapViewOfFile
IsWow64Process
LoadLibraryExW
RemoveDirectoryW
Sleep
GetCurrentProcessId
UnmapViewOfFile
InitializeCriticalSectionAndSpinCount
SetEvent
GetFullPathNameW
WaitForSingleObjectEx
CreateEventW
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TerminateProcess
IsProcessorFeaturePresent
IsDebuggerPresent
QueryPerformanceCounter
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
RtlUnwindEx
RtlPcToFileHeader
RaiseException
SetLastError
EncodePointer
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
FreeLibrary
EnterCriticalSection
FindFirstFileExW
GetFileSizeEx
CreateDirectoryW
GetModuleHandleW
OutputDebugStringW
ResetEvent
GetStringTypeW
InitializeConditionVariable
WakeConditionVariable
WakeAllConditionVariable
SleepConditionVariableCS
SleepConditionVariableSRW
InitializeSRWLock
ReleaseSRWLockExclusive
AcquireSRWLockExclusive
InitializeCriticalSectionEx
TryEnterCriticalSection
GetExitCodeThread
DecodePointer
LCMapStringEx

advapi32

RegCloseKey
RegGetValueW
DeregisterEventSource
RegisterEventSourceW
ReportEventW
RegOpenKeyExW

user32

MessageBoxW

shell32

ShellExecuteW

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

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

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

__acrt_iob_func
fwrite
_set_fmode
fclose
fputc
fgetc
__stdio_common_vsprintf_s
fseek
_wfsopen
fgetpos
setvbuf
_wfopen
__stdio_common_vswprintf
__stdio_common_vfwprintf
fflush
fputws
fputwc
ungetc
fsetpos
fread
_fseeki64
_get_stream_buffer_pointers
__p__commode

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

_callnewh
realloc
malloc
free
calloc
_set_new_mode

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

__strncnt
_wcsicmp
_wcsdup
_wcsnicmp
wcsncmp
strcspn
islower
towlower
strcpy_s
isupper
wcsnlen

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

wcstoul
_wtoi

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

localeconv
_lock_locales
_unlock_locales
setlocale
_configthreadlocale
__pctype_func
___mb_cur_max_func
___lc_locale_name_func
___lc_codepage_func

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

__setusermatherr
ceilf
frexp

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

_time64
wcsftime
_gmtime64

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

_wrename
_unlock_file
_lock_file
_wremove

Exports

Exports

corehost_initialize
corehost_load
corehost_main
corehost_main_with_output_buffer
corehost_resolve_component_dependencies
corehost_set_error_writer
corehost_unload
hostfxr_close
hostfxr_get_available_sdks
hostfxr_get_native_search_directories
hostfxr_get_runtime_delegate
hostfxr_get_runtime_properties
hostfxr_get_runtime_property_value
hostfxr_initialize_for_dotnet_command_line
hostfxr_initialize_for_runtime_config
hostfxr_main
hostfxr_main_bundle_startupinfo
hostfxr_main_startupinfo
hostfxr_resolve_sdk
hostfxr_resolve_sdk2
hostfxr_run_app
hostfxr_set_error_writer
hostfxr_set_runtime_property_value

Sections

.text
Size: 294KB - Virtual size: 294KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 106KB - Virtual size: 105KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 5KB - Virtual size: 9KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 12KB - Virtual size: 11KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

_RDATA
Size: 512B - Virtual size: 252B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 1KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

.rsrc
Size: 1KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

21c545b801a2a9bdada8a6dcb7cc0fc3

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

kernel32

advapi32

user32

shell32

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

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

Exports

Exports

Sections

.text Size: 294KB - Virtual size: 294KB

.rdata Size: 106KB - Virtual size: 105KB

.data Size: 5KB - Virtual size: 9KB

.pdata Size: 12KB - Virtual size: 11KB

_RDATA Size: 512B - Virtual size: 252B

.reloc Size: 1KB - Virtual size: 1KB

.rsrc Size: 1KB - Virtual size: 1KB

.text
Size: 294KB - Virtual size: 294KB

.rdata
Size: 106KB - Virtual size: 105KB

.data
Size: 5KB - Virtual size: 9KB

.pdata
Size: 12KB - Virtual size: 11KB

_RDATA
Size: 512B - Virtual size: 252B

.reloc
Size: 1KB - Virtual size: 1KB

.rsrc
Size: 1KB - Virtual size: 1KB