Froststrap[.]exe | Triage™

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General

Target
Froststrap.exe
Size 21.5MB
Sample260808-yc91pafc35
SHA256 a046759229d37102369ea8de2ed9370c07b4af2cc2ea9cac66816cfb5ecd1b83
MD5 65504770dbe4b002b6b490346c954caa
SHA1 ad33504c3d4fa8dc1b5702d0a3a1661e997a7d0b
SHA512 11c4371ac49ea394efccecb2504d26aec595995f2224d06d6d652f7059e36a6cf55454a69576bda7a27e669683ac6bc2d97b01124bee38e2d0371826072d0239
SSDEEP 393216:1JssJJk4NssjJ/3sQJ+xuJoWlYLfwMjvMsM4IAO:Hxh/5kuJoWiMsbt
TLSH
T1EF379D41A7FC0A35D3BB5734A97021091536BD5AE751E74F2A8CBA6D2F723808CA0B77
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
Froststrap.exe

File Explorer

Froststrap.exe

.exe 21.5MB

Froststrap.exe

IMPHASH 53e4e12437621212a425d294842d0a96
SHA256 a046759229d37102369ea8de2ed9370c07b4af2cc2ea9cac66816cfb5ecd1b83
MD5 65504770dbe4b002b6b490346c954caa
SHA1 ad33504c3d4fa8dc1b5702d0a3a1661e997a7d0b
SHA512 11c4371ac49ea394efccecb2504d26aec595995f2224d06d6d652f7059e36a6cf55454a69576bda7a27e669683ac6bc2d97b01124bee38e2d0371826072d0239
SSDEEP 393216:1JssJJk4NssjJ/3sQJ+xuJoWlYLfwMjvMsM4IAO:Hxh/5kuJoWiMsbt
TLSH
T1EF379D41A7FC0A35D3BB5734A97021091536BD5AE751E74F2A8CBA6D2F723808CA0B77
MD5 SHA1 SHA512 SSDEEP TLSH

windows:6 windows x64 arch:x64

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

22529965

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

DLL Characteristics

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

shell32

ShellExecuteW

advapi32

RegCloseKey ReportEventW RegisterEventSourceW RegOpenKeyExW RegGetValueW DeregisterEventSource

kernel32

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

user32

MessageBoxW

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

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

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

_set_new_mode calloc malloc _callnewh free

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

_time64 _gmtime64_s wcsftime

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

__stdio_common_vfwprintf __p__commode fputwc __acrt_iob_func __stdio_common_vswprintf _set_fmode _wfsopen fflush setvbuf __stdio_common_vsnwprintf_s

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

_create_locale ___mb_cur_max_func ___lc_codepage_func ___lc_locale_name_func __pctype_func _configthreadlocale setlocale _lock_locales _free_locale _unlock_locales

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

strlen strcmp wcsncmp toupper strcpy_s _wcsdup wcsnlen

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

_wtoi wcstoul

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

__setusermatherr

Name

.text

Size

97KB

Virtual Size

96KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

49KB

Virtual Size

49KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

3KB

Virtual Size

6KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

5KB

Virtual Size

5KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

1024B

Virtual Size

828B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

.rsrc

Size

21.4MB

Virtual Size

21.4MB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Sharing

General

Malware Config

Signatures

File Explorer

Froststrap.exe

shell32

advapi32

kernel32

user32

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

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

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

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

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

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

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

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

generic