CemuMegaDownloader[.]exe

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General

Target

CemuMegaDownloader.exe
Size

550KB
MD5

5aefc3889acf159ed953b7f949cc5f2d
SHA1

05933502d59545f74a4ee792268b1e90d55431d9
SHA256

97db23a028162a8e48e35be040163640d21c0c2312b00aa59e16880e9c683700
SHA512

02303f2d09b1dd4c8fa71a6520227fbf5e5492bfff25f4be0a0b9b069eec5ddb0c7e3b6dda86f8f9178c8da333fa214968ccef26119997829a3cb0d638984a30
SSDEEP

12288:zfAxEYkOFyxhA+MyQHUwMh6djkTgmKihPu4:zfAxlxd0xhKUhPu4

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
CemuMegaDownloader.exe

Files

CemuMegaDownloader.exe
.exe windows:4 windows x64 arch:x64

c6db402ec080f334fa9feab9f7a0c971

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE

Imports

libcurl-4

curl_easy_cleanup
curl_easy_getinfo
curl_easy_init
curl_easy_perform
curl_easy_setopt
curl_global_cleanup
curl_global_init

libgcc_s_seh-1

_Unwind_Resume

kernel32

CreateDirectoryW
DeleteCriticalSection
EnterCriticalSection
GetLastError
InitializeCriticalSection
LeaveCriticalSection
MultiByteToWideChar
SetUnhandledExceptionFilter
Sleep
TlsGetValue
VirtualProtect
VirtualQuery
__C_specific_handler

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

mbrtowc
wcrtomb

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

__p__environ
__p__wenviron

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

_lock_file
_splitpath_s
_mkdir
_unlock_file
_wrename
_wstat64

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

_set_new_mode
calloc
free
malloc
realloc

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

localeconv

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

__setusermatherr

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

memcmp
memcpy
memmove
strchr

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

__p___argc
__p___argv
__p___wargv
_assert
_cexit
_configure_narrow_argv
_configure_wide_argv
_crt_at_quick_exit
_crt_atexit
_errno
_initialize_narrow_environment
_initialize_wide_environment
_initterm
_set_app_type
_set_invalid_parameter_handler
abort
exit
signal
strerror

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

__acrt_iob_func
__p__commode
__p__fmode
__stdio_common_vfprintf
__stdio_common_vfwprintf
_fseeki64
_ftelli64
_wfopen_s
fclose
fflush
fopen
fputc
fread
fseek
ftell
fwrite

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

_strdup
memset
strcmp
strcpy
strlen
strncat
strncmp
strncpy
wcslen

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

__daylight
__timezone
__tzname
_tzset

libstdc++-6

_ZNKSt10filesystem7__cxx1118directory_iteratordeEv
_ZNKSt10filesystem7__cxx114path5_List13_Impl_deleterclEPNS2_5_ImplE
_ZNKSt12__basic_fileIcE7is_openEv
_ZNKSt5ctypeIcE13_M_widen_initEv
_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4findEcy
_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7compareEPKc
_ZNKSt7__cxx1115basic_stringbufIcSt11char_traitsIcESaIcEE3strEv
_ZNKSt7codecvtIwc9_MbstatetE10do_unshiftERS0_PcS3_RS3_
_ZNKSt7codecvtIwc9_MbstatetE11do_encodingEv
_ZNKSt7codecvtIwc9_MbstatetE13do_max_lengthEv
_ZNKSt7codecvtIwc9_MbstatetE16do_always_noconvEv
_ZNKSt7codecvtIwc9_MbstatetE5do_inERS0_PKcS4_RS4_PwS6_RS6_
_ZNKSt7codecvtIwc9_MbstatetE6do_outERS0_PKwS4_RS4_PcS6_RS6_
_ZNKSt7codecvtIwc9_MbstatetE9do_lengthERS0_PKcS4_y
_ZNSi10_M_extractIdEERSiRT_
_ZNSi3getEv
_ZNSi6ignoreEv
_ZNSirsERi
_ZNSo3putEc
_ZNSo5flushEv
_ZNSolsEPSt15basic_streambufIcSt11char_traitsIcEE
_ZNSt10filesystem6removeERKNS_7__cxx114pathE
_ZNSt10filesystem6statusERKNS_7__cxx114pathE
_ZNSt10filesystem7__cxx1116filesystem_errorC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESt10error_code
_ZNSt10filesystem7__cxx1116filesystem_errorD1Ev
_ZNSt10filesystem7__cxx1118directory_iteratorC1ERKNS0_4pathENS_17directory_optionsEPSt10error_code
_ZNSt10filesystem7__cxx1118directory_iteratorppEv
_ZNSt10filesystem7__cxx114path14_M_split_cmptsEv
_ZNSt10filesystem7__cxx114path5_ListC1Ev
_ZNSt14basic_ifstreamIcSt11char_traitsIcEE5closeEv
_ZNSt14basic_ifstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode
_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev
_ZNSt3_V216generic_categoryEv
_ZNSt6localeC1Ev
_ZNSt6localeD1Ev
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE10_M_replaceEyyPKcy
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_M_constructEyc
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6appendEPKc
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6resizeEyc
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7reserveEy
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE8_M_eraseEyy
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_appendEPKcy
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_assignERKS4_
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_createERyy
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEyyPKcy
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9push_backEc
_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1EOS4_
_ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE6resizeEyw
_ZNSt7__cxx1115basic_stringbufIcSt11char_traitsIcESaIcEE7_M_syncEPcyy
_ZNSt7__cxx1119basic_istringstreamIcSt11char_traitsIcESaIcEED1Ev
_ZNSt7__cxx1119basic_ostringstreamIcSt11char_traitsIcESaIcEEC1Ev
_ZNSt7__cxx1119basic_ostringstreamIcSt11char_traitsIcESaIcEED1Ev
_ZNSt7codecvtIwc9_MbstatetEC2Ey
_ZNSt7codecvtIwc9_MbstatetED2Ev
_ZNSt8ios_base4InitC1Ev
_ZNSt8ios_base4InitD1Ev
_ZNSt8ios_baseC2Ev
_ZNSt8ios_baseD2Ev
_ZNSt9basic_iosIcSt11char_traitsIcEE4initEPSt15basic_streambufIcS1_E
_ZNSt9exceptionD2Ev
_ZSt16__ostream_insertIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_PKS3_x
_ZSt16__throw_bad_castv
_ZSt17__throw_bad_allocv
_ZSt18_Rb_tree_decrementPKSt18_Rb_tree_node_base
_ZSt18_Rb_tree_decrementPSt18_Rb_tree_node_base
_ZSt18_Rb_tree_incrementPKSt18_Rb_tree_node_base
_ZSt18_Rb_tree_incrementPSt18_Rb_tree_node_base
_ZSt19__throw_logic_errorPKc
_ZSt20__throw_length_errorPKc
_ZSt28_Rb_tree_rebalance_for_erasePSt18_Rb_tree_node_baseRS_
_ZSt28__throw_bad_array_new_lengthv
_ZSt29_Rb_tree_insert_and_rebalancebPSt18_Rb_tree_node_baseS0_RS_
_ZSt3cin
_ZSt4cout
_ZTTNSt7__cxx1119basic_istringstreamIcSt11char_traitsIcESaIcEEE
_ZTTNSt7__cxx1119basic_ostringstreamIcSt11char_traitsIcESaIcEEE
_ZTVN10__cxxabiv117__class_type_infoE
_ZTVN10__cxxabiv120__si_class_type_infoE
_ZTVN10__cxxabiv121__vmi_class_type_infoE
_ZTVNSt7__cxx1115basic_stringbufIcSt11char_traitsIcESaIcEEE
_ZTVNSt7__cxx1119basic_istringstreamIcSt11char_traitsIcESaIcEEE
_ZTVNSt7__cxx1119basic_ostringstreamIcSt11char_traitsIcESaIcEEE
_ZTVSt15basic_streambufIcSt11char_traitsIcEE
_ZTVSt9basic_iosIcSt11char_traitsIcEE
_ZdlPvy
_Znwy
__cxa_allocate_exception
__cxa_begin_catch
__cxa_end_catch
__cxa_free_exception
__cxa_guard_abort
__cxa_guard_acquire
__cxa_guard_release
__cxa_rethrow
__cxa_throw
__gxx_personality_seh0

Sections

.text
Size: 186KB - Virtual size: 185KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 512B - Virtual size: 304B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rdata
Size: 25KB - Virtual size: 24KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.pdata
Size: 6KB - Virtual size: 6KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.xdata
Size: 13KB - Virtual size: 13KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.bss
Size: - Virtual size: 4KB

IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 10KB - Virtual size: 10KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.CRT
Size: 512B - Virtual size: 96B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.tls
Size: 512B - Virtual size: 16B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.reloc
Size: 512B - Virtual size: 408B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/4
Size: 2KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/19
Size: 72KB - Virtual size: 72KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/31
Size: 13KB - Virtual size: 12KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/45
Size: 26KB - Virtual size: 25KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/57
Size: 8KB - Virtual size: 7KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/70
Size: 1024B - Virtual size: 926B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/81
Size: 11KB - Virtual size: 10KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/97
Size: 29KB - Virtual size: 29KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/113
Size: 1KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

c6db402ec080f334fa9feab9f7a0c971

Headers

DLL Characteristics

File Characteristics

Imports

libcurl-4

libgcc_s_seh-1

kernel32

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

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

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

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

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

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

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

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

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

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

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

libstdc++-6

Sections

.text Size: 186KB - Virtual size: 185KB

.data Size: 512B - Virtual size: 304B

.rdata Size: 25KB - Virtual size: 24KB

.pdata Size: 6KB - Virtual size: 6KB

.xdata Size: 13KB - Virtual size: 13KB

.bss Size: - Virtual size: 4KB

.idata Size: 10KB - Virtual size: 10KB

.CRT Size: 512B - Virtual size: 96B

.tls Size: 512B - Virtual size: 16B

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

.reloc Size: 512B - Virtual size: 408B

/4 Size: 2KB - Virtual size: 1KB

/19 Size: 72KB - Virtual size: 72KB

/31 Size: 13KB - Virtual size: 12KB

/45 Size: 26KB - Virtual size: 25KB

/57 Size: 8KB - Virtual size: 7KB

/70 Size: 1024B - Virtual size: 926B

/81 Size: 11KB - Virtual size: 10KB

/97 Size: 29KB - Virtual size: 29KB

/113 Size: 1KB - Virtual size: 1KB

.text
Size: 186KB - Virtual size: 185KB

.data
Size: 512B - Virtual size: 304B

.rdata
Size: 25KB - Virtual size: 24KB

.pdata
Size: 6KB - Virtual size: 6KB

.xdata
Size: 13KB - Virtual size: 13KB

.bss
Size: - Virtual size: 4KB

.idata
Size: 10KB - Virtual size: 10KB

.CRT
Size: 512B - Virtual size: 96B

.tls
Size: 512B - Virtual size: 16B

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

.reloc
Size: 512B - Virtual size: 408B

/4
Size: 2KB - Virtual size: 1KB

/19
Size: 72KB - Virtual size: 72KB

/31
Size: 13KB - Virtual size: 12KB

/45
Size: 26KB - Virtual size: 25KB

/57
Size: 8KB - Virtual size: 7KB

/70
Size: 1024B - Virtual size: 926B

/81
Size: 11KB - Virtual size: 10KB

/97
Size: 29KB - Virtual size: 29KB

/113
Size: 1KB - Virtual size: 1KB