KovaaKs[.]exe | Triage

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General

Target

KovaaKs.exe
Size

429KB
MD5

b88444cf2c03ce4efe2a1608a379ee53
SHA1

68d9285ee72288656c258cf9db9c564226a48ddb
SHA256

d70e292a21ebc5ca1675ca585bcae52a51aad4bcee9bbbaf44b0a2cc635b64c7
SHA512

7c9e116a417f2a15d2ca3f70b61697c9e34b6131b12221032cde9d64c41993f6f8cfa34196ed99122aa34d59159955d6362827f0d4eee1688bce465539e8d633
SSDEEP

12288:Zt5NpMGK6Ia5Jr4IQAvq3eSKXvVZhuwxHvh:Zt5NGGzIo3QSqOS+VZhT

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
KovaaKs.exe

Files

KovaaKs.exe
.exe windows:6 windows x64

1cbe23d5bc6daa93fa901ee43d967ea4

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

FormatMessageA
CreateFileA
GetFileSizeEx
WideCharToMultiByte
IsDebuggerPresent
WaitForMultipleObjects
PeekNamedPipe
ReadFile
GetFileType
GetStdHandle
GetEnvironmentVariableA
MultiByteToWideChar
WaitForSingleObjectEx
CloseHandle
MoveFileExA
Sleep
InitializeSListHead
GetSystemTimeAsFileTime
GetCurrentThreadId
GetCurrentProcessId
IsProcessorFeaturePresent
TerminateProcess
GetCurrentProcess
GetTickCount
UnhandledExceptionFilter
RtlVirtualUnwind
RtlLookupFunctionEntry
RtlCaptureContext
GetFileInformationByHandleEx
GetModuleHandleW
AreFileApisANSI
GetFileAttributesExW
FindFirstFileW
FindClose
CreateFileW
CreateDirectoryW
GetLocaleInfoEx
LocalFree
SetLastError
QueryPerformanceCounter
VerifyVersionInfoA
LoadLibraryA
GetProcAddress
GetModuleHandleA
FreeLibrary
GetSystemDirectoryA
QueryPerformanceFrequency
VerSetConditionMask
SleepEx
GetLastError
DeleteCriticalSection
InitializeCriticalSectionEx
LeaveCriticalSection
SetUnhandledExceptionFilter
EnterCriticalSection

advapi32

CryptAcquireContextA
CryptGetHashParam
CryptGenRandom
CryptCreateHash
CryptHashData
CryptDestroyHash
CryptDestroyKey
CryptImportKey
CryptEncrypt
CryptReleaseContext

msvcp140

?_Winerror_map@std@@YAHH@Z
?_Xlength_error@std@@YAXPEBD@Z
?_Syserror_map@std@@YAPEBDH@Z
?_Xout_of_range@std@@YAXPEBD@Z

normaliz

IdnToAscii

ws2_32

getaddrinfo
select
__WSAFDIsSet
WSAIoctl
freeaddrinfo
socket
WSAStartup
WSACleanup
accept
htonl
closesocket
recvfrom
listen
ioctlsocket
setsockopt
recv
send
WSAGetLastError
bind
gethostname
connect
ntohl
sendto
getpeername
getsockname
ntohs
htons
getsockopt
WSASetLastError

wldap32

ord60
ord45
ord50
ord211
ord46
ord217
ord143
ord22
ord26
ord27
ord32
ord33
ord35
ord301
ord200
ord30
ord41
ord79

crypt32

CertFreeCertificateChainEngine
CertGetNameStringA
CertFreeCertificateChain
CertCloseStore
CertCreateCertificateChainEngine
CryptQueryObject
CertFindExtension
CertAddCertificateContextToStore
CryptDecodeObjectEx
PFXImportCertStore
CryptStringToBinaryA
CertFreeCertificateContext
CertFindCertificateInStore
CertEnumCertificatesInStore
CertGetCertificateChain
CertOpenStore

vcruntime140_1

__CxxFrameHandler4

vcruntime140

memchr
memcmp
__current_exception
__C_specific_handler
__current_exception_context
strstr
__std_exception_destroy
__std_exception_copy
memcpy
memset
strchr
strrchr
memmove
_CxxThrowException

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

_callnewh
free
calloc
realloc
malloc
_set_new_mode

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

fclose
_open
_close
_write
_read
fputs
__p__commode
_set_fmode
fwrite
__stdio_common_vsscanf
feof
fseek
_lseeki64
ftell
fgets
__stdio_common_vsprintf
fputc
fflush
__acrt_iob_func
fread
fopen

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

_initialize_onexit_table
_register_onexit_function
_crt_atexit
__p___argc
_exit
exit
_get_initial_narrow_environment
_initialize_narrow_environment
_configure_narrow_argv
__p___argv
_cexit
_set_app_type
_seh_filter_exe
terminate
_register_thread_local_exe_atexit_callback
__sys_nerr
_getpid
_beginthreadex
_initterm_e
_c_exit
strerror
_errno
_invalid_parameter_noinfo_noreturn
system
_initterm

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

getenv

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

strncpy
strpbrk
strspn
isupper
_strdup
strcspn
strcmp
tolower
strncmp

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

_gmtime64
_time64

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

qsort

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

_access
_stat64
_unlink
_fstat64

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

strtol
strtoul
strtoll
atoi

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

_configthreadlocale
___lc_codepage_func

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

__setusermatherr

Sections

.text
Size: 329KB - Virtual size: 328KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 82KB - Virtual size: 81KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 1024B - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 14KB - Virtual size: 14KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 512B - Virtual size: 480B

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

Sharing

General

Malware Config

Signatures

Files

1cbe23d5bc6daa93fa901ee43d967ea4

Headers

DLL Characteristics

File Characteristics

Imports

kernel32

advapi32

msvcp140

normaliz

ws2_32

wldap32

crypt32

vcruntime140_1

vcruntime140

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

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

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

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

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

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

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

api-ms-win-crt-filesystem-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

Sections

.text Size: 329KB - Virtual size: 328KB

.rdata Size: 82KB - Virtual size: 81KB

.data Size: 1024B - Virtual size: 2KB

.pdata Size: 14KB - Virtual size: 14KB

.rsrc Size: 512B - Virtual size: 480B

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

.text
Size: 329KB - Virtual size: 328KB

.rdata
Size: 82KB - Virtual size: 81KB

.data
Size: 1024B - Virtual size: 2KB

.pdata
Size: 14KB - Virtual size: 14KB

.rsrc
Size: 512B - Virtual size: 480B

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