CirklWindowsInstaller[.]exe

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General

Target

CirklWindowsInstaller.exe
Size

152KB
MD5

513fd59ecb2a5b141aa9937538f8c13a
SHA1

8efaa55b729c5c36709f1b3cad431b21f9ed03bc
SHA256

c06f9afdc8a2d997e433f0406f3880717442be4a805ec44123a305f2b5a99d66
SHA512

1f71396f2284063c440d1e42fe98b36b66c5f717eb52e21962cfa57ace885fceed232efce88a8554851541b743c756a83108f8c31a9b40f13edd9f550cb8513e
SSDEEP

3072:S25KS66wPh5FXLbHoBqgzCMQ94W5M8SvNQaRUc0+m2oG5UZUzk:ts6wP5q7zNmGpvNQa+F+uD24

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
CirklWindowsInstaller.exe

Files

CirklWindowsInstaller.exe
.exe windows:6 windows x86 arch:x86

ffff45487d1e51fa972c8409931457df

Headers

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:\a\_work\1\s\artifacts\obj\win-x86.Release\corehost\apphost\standalone\apphost.pdb

Imports

kernel32

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

user32

MessageBoxW

shell32

ShellExecuteW

advapi32

RegOpenKeyExW
RegGetValueW
DeregisterEventSource
RegisterEventSourceW
ReportEventW
RegCloseKey

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

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

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

__p__commode
__acrt_iob_func
fputwc
fputws
__stdio_common_vsprintf_s
fflush
__stdio_common_vfwprintf
__stdio_common_vswprintf
_wfopen
setvbuf
_set_fmode

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

_set_new_mode
_callnewh
free
malloc
calloc

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

strcpy_s
strcspn
wcsncmp
toupper
wcsnlen
_wcsdup

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

_wtoi
wcstoul

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

_configthreadlocale
_lock_locales
___lc_locale_name_func
___mb_cur_max_func
___lc_codepage_func
__pctype_func
setlocale
_unlock_locales
localeconv

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

frexp
__setusermatherr

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

_gmtime64_s
wcsftime
_time64

Sections

.text
Size: 76KB - Virtual size: 75KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 27KB - Virtual size: 26KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 2KB - Virtual size: 3KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.reloc
Size: 4KB - Virtual size: 4KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

.rsrc
Size: 6KB - Virtual size: 5KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

ffff45487d1e51fa972c8409931457df

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: 76KB - Virtual size: 75KB

.rdata Size: 27KB - Virtual size: 26KB

.data Size: 2KB - Virtual size: 3KB

.reloc Size: 4KB - Virtual size: 4KB

.rsrc Size: 6KB - Virtual size: 5KB

.text
Size: 76KB - Virtual size: 75KB

.rdata
Size: 27KB - Virtual size: 26KB

.data
Size: 2KB - Virtual size: 3KB

.reloc
Size: 4KB - Virtual size: 4KB

.rsrc
Size: 6KB - Virtual size: 5KB