Static task
static1
Behavioral task
behavioral1
Sample
core.css_s_s_s.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
core.css_s_s_s.exe
Resource
win10v2004-20230915-en
General
-
Target
core.css_s_s_s.exe
-
Size
725KB
-
MD5
0203b06a08c7acb603039389cd79ae23
-
SHA1
95057ce727b1d3a2cb9e65192891b17dd6a1719b
-
SHA256
bd20ddc9c7cf751396c5f12a7fdf3a3d2fc38e7928101dcf7b8cf5bada806006
-
SHA512
6b9deba0cbed9cc0b128af721bacef88952e87d4103288245296904d40c2181a1da38cba17bb7906e8705d9cc902e78f557ef4a2c88ad126455c77a86b6c488c
-
SSDEEP
12288:joPK2r3lvyD7jaEEEEEEEq023yz1U6iEjqPR4eZzAJRR9QmP:cPVlWjc0QyxTjqPRFZz+LTP
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource core.css_s_s_s.exe
Files
-
core.css_s_s_s.exe.exe windows:6 windows x64
77899504a65f48fa079a0dc139c68725
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
Imports
kernel32
SleepEx
LeaveCriticalSection
FormatMessageA
SetLastError
QueryFullProcessImageNameW
GetModuleHandleW
GetModuleHandleA
GetModuleFileNameA
UnmapViewOfFile
MapViewOfFile
VerSetConditionMask
QueryPerformanceFrequency
GetSystemDirectoryA
FreeLibrary
GetProcAddress
LoadLibraryA
VerifyVersionInfoA
QueryPerformanceCounter
GetTickCount
MoveFileExA
WaitForSingleObjectEx
MultiByteToWideChar
GetEnvironmentVariableA
GetFileType
ReadFile
PeekNamedPipe
WaitForMultipleObjects
CreateFileA
GetFileSizeEx
EnterCriticalSection
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TerminateProcess
CreateFileMappingW
VirtualProtect
GetCurrentProcess
DeleteCriticalSection
InitializeCriticalSectionEx
GetLastError
SetConsoleCursorPosition
GetConsoleWindow
Beep
FillConsoleOutputAttribute
CreateThread
Sleep
CreateFileW
IsProcessorFeaturePresent
IsDebuggerPresent
WideCharToMultiByte
GetCurrentProcessId
GetCurrentThreadId
GetStdHandle
SetConsoleTextAttribute
GetConsoleScreenBufferInfo
FillConsoleOutputCharacterA
CloseHandle
Process32Next
CreateToolhelp32Snapshot
Process32First
OutputDebugStringW
InitializeSListHead
GetSystemTimeAsFileTime
user32
MessageBoxW
MessageBoxA
FindWindowA
SetLayeredWindowAttributes
GetAsyncKeyState
ShowWindow
GetDC
advapi32
OpenProcessToken
AddAccessAllowedAce
GetLengthSid
GetTokenInformation
InitializeAcl
IsValidSid
SetSecurityInfo
CryptAcquireContextA
CryptReleaseContext
GetUserNameA
RegCloseKey
RegCreateKeyExA
CryptEncrypt
CryptImportKey
CryptDestroyKey
CryptDestroyHash
CryptHashData
CryptCreateHash
CryptGenRandom
CryptGetHashParam
RegSetValueExA
msvcp140
?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAAXXZ
?_Xlength_error@std@@YAXPEBD@Z
?_Xbad_function_call@std@@YAXXZ
?_Getcat@?$ctype@D@std@@SA_KPEAPEBVfacet@locale@2@PEBV42@@Z
?getloc@ios_base@std@@QEBA?AVlocale@2@XZ
?sgetc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEAAHXZ
?snextc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEAAHXZ
?_Ipfx@?$basic_istream@DU?$char_traits@D@std@@@std@@QEAA_N_N@Z
_Xtime_get_ticks
_Query_perf_counter
_Thrd_sleep
_Cnd_do_broadcast_at_thread_exit
?id@?$ctype@D@std@@2V0locale@2@A
?cin@std@@3V?$basic_istream@DU?$char_traits@D@std@@@1@A
?_Getgloballocale@locale@std@@CAPEAV_Locimp@12@XZ
?_Throw_Cpp_error@std@@YAXH@Z
??0_Lockit@std@@QEAA@H@Z
??1_Lockit@std@@QEAA@XZ
_Query_perf_frequency
?good@ios_base@std@@QEBA_NXZ
??1?$basic_iostream@DU?$char_traits@D@std@@@std@@UEAA@XZ
??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@H@Z
??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@P6AAEAVios_base@1@AEAV21@@Z@Z
??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@P6AAEAV01@AEAV01@@Z@Z
??1?$basic_ios@DU?$char_traits@D@std@@@std@@UEAA@XZ
?imbue@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAAXAEBVlocale@2@@Z
?sync@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAAHXZ
?setbuf@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAAPEAV12@PEAD_J@Z
?xsputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAA_JPEBD_J@Z
?xsgetn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAA_JPEAD_J@Z
?uflow@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAAHXZ
?showmanyc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAA_JXZ
??Bid@locale@std@@QEAA_KXZ
?_Lock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAAXXZ
??1?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAA@XZ
??0?$basic_iostream@DU?$char_traits@D@std@@@std@@QEAA@PEAV?$basic_streambuf@DU?$char_traits@D@std@@@1@@Z
??0?$basic_ios@DU?$char_traits@D@std@@@std@@IEAA@XZ
?cout@std@@3V?$basic_ostream@DU?$char_traits@D@std@@@1@A
?uncaught_exception@std@@YA_NXZ
?_Xout_of_range@std@@YAXPEBD@Z
?setstate@?$basic_ios@DU?$char_traits@D@std@@@std@@QEAAXH_N@Z
?cerr@std@@3V?$basic_ostream@DU?$char_traits@D@std@@@1@A
?setw@std@@YA?AU?$_Smanip@_J@1@_J@Z
?flush@?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV12@XZ
?_Osfx@?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAXXZ
?sputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEAA_JPEBD_J@Z
??0?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAA@XZ
?sputc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEAAHD@Z
?widen@?$basic_ios@DU?$char_traits@D@std@@@std@@QEBADD@Z
?put@?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV12@D@Z
normaliz
IdnToAscii
wldap32
ord41
ord27
ord26
ord50
ord32
ord33
ord35
ord79
ord30
ord200
ord301
ord45
ord60
ord211
ord143
ord46
ord217
ord22
crypt32
PFXImportCertStore
CryptStringToBinaryA
CertFreeCertificateContext
CertFindCertificateInStore
CertEnumCertificatesInStore
CertCloseStore
CertOpenStore
CryptDecodeObjectEx
CertAddCertificateContextToStore
CertFindExtension
CertGetNameStringA
CryptQueryObject
CertCreateCertificateChainEngine
CertFreeCertificateChainEngine
CertGetCertificateChain
CertFreeCertificateChain
ws2_32
connect
getpeername
send
recv
getsockopt
htons
ntohs
closesocket
setsockopt
socket
WSASetLastError
WSAIoctl
bind
WSACleanup
accept
htonl
listen
ioctlsocket
__WSAFDIsSet
gethostname
select
getaddrinfo
freeaddrinfo
recvfrom
sendto
ntohl
WSAStartup
WSAGetLastError
getsockname
rpcrt4
RpcStringFreeA
UuidToStringA
UuidCreate
psapi
GetModuleInformation
vcruntime140_1
__CxxFrameHandler4
vcruntime140
strstr
strchr
memset
memmove
__current_exception_context
memcmp
memchr
_CxxThrowException
__std_terminate
__std_exception_destroy
__current_exception
memcpy
__C_specific_handler
strrchr
__std_exception_copy
api-ms-win-crt-runtime-l1-1-0
exit
__sys_nerr
_beginthreadex
_invalid_parameter_noinfo_noreturn
system
strerror
_getpid
_errno
_configure_narrow_argv
terminate
_initialize_narrow_environment
_register_thread_local_exe_atexit_callback
_c_exit
__p___argv
__p___argc
_initialize_onexit_table
_exit
_initterm_e
_initterm
_get_initial_narrow_environment
_set_app_type
_seh_filter_exe
_cexit
_crt_atexit
_register_onexit_function
api-ms-win-crt-heap-l1-1-0
free
malloc
_set_new_mode
calloc
_callnewh
realloc
api-ms-win-crt-utility-l1-1-0
qsort
api-ms-win-crt-string-l1-1-0
strncmp
strncpy
strpbrk
tolower
strcmp
strcspn
strspn
isupper
_strdup
api-ms-win-crt-stdio-l1-1-0
_read
_write
_close
fgets
__p__commode
_open
_lseeki64
_popen
__stdio_common_vsprintf
fflush
_pclose
ftell
fseek
feof
__stdio_common_vsscanf
fputs
fopen
fclose
fputc
fread
fwrite
__acrt_iob_func
_set_fmode
api-ms-win-crt-time-l1-1-0
_time64
_gmtime64
api-ms-win-crt-filesystem-l1-1-0
_unlink
remove
_stat64
_fstat64
_access
api-ms-win-crt-convert-l1-1-0
strtol
strtod
atoi
strtoll
strtoull
strtoul
api-ms-win-crt-locale-l1-1-0
_configthreadlocale
localeconv
api-ms-win-crt-math-l1-1-0
_dclass
__setusermatherr
shell32
ShellExecuteA
Sections
.text Size: 562KB - Virtual size: 561KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 140KB - Virtual size: 140KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 1KB - Virtual size: 4KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 18KB - Virtual size: 18KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 512B - Virtual size: 488B
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