winlogon[.]exe

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General

Target

winlogon.exe
Size

694KB
MD5

ef389103e8ed76b5456266ff21bedc3a
SHA1

57adb25e790fe9af1c3bf0d6430562cd37049ae7
SHA256

885d3a70a49f17a083c25bb7c886dbb9689a0a143abebb48980bb9c2720d94eb
SHA512

bfb1455a8135b320088e98f5d4c04cea61f8f8ac0856cb845c6184f092d1eef34512f97b93bd587a98314972af9b0b71f2d69aa36f64df6b6a659515453d1ae1
SSDEEP

12288:iczBJ46IV0bDokE+CphcDofUD6vmJY1I0US1HoGxordIoWhvDAaHeT+bfTwt:lOUgmrdI3hvjeybfTwt

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
winlogon.exe

Files

winlogon.exe
.exe windows:4 windows x64 arch:x64

c47a2d9faf5e7c2fbf4b1d694d8b3055

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_LOCAL_SYMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED

Imports

advapi32

SystemFunction036

bcrypt

BCryptGenRandom

kernel32

AcquireSRWLockExclusive
AddVectoredExceptionHandler
CloseHandle
CopyFileExW
CreateFileW
CreateThread
CreateWaitableTimerExW
DeleteFileW
ExitProcess
FindClose
FindFirstFileW
FindNextFileW
FormatMessageW
GetCommandLineW
GetConsoleMode
GetCurrentThread
GetEnvironmentVariableW
GetFileInformationByHandle
GetFileInformationByHandleEx
GetFullPathNameW
GetLastError
GetModuleFileNameW
GetModuleHandleA
GetModuleHandleW
GetProcAddress
GetProcessHeap
GetStartupInfoA
GetStdHandle
GetSystemInfo
HeapAlloc
HeapFree
HeapReAlloc
InitOnceBeginInitialize
InitOnceComplete
MultiByteToWideChar
QueryPerformanceCounter
QueryPerformanceFrequency
ReleaseSRWLockExclusive
SetFileInformationByHandle
SetFilePointerEx
SetHandleInformation
SetLastError
SetThreadStackGuarantee
SetUnhandledExceptionFilter
SetWaitableTimer
Sleep
SleepConditionVariableSRW
SwitchToThread
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
TryAcquireSRWLockExclusive
WaitForSingleObject
WakeAllConditionVariable
WakeConditionVariable
WriteConsoleW
lstrlenW
DeleteCriticalSection
EnterCriticalSection
InitializeCriticalSection
LeaveCriticalSection
RaiseException
RtlCaptureContext
RtlLookupFunctionEntry
RtlUnwindEx
RtlVirtualUnwind
VirtualProtect
VirtualQuery
__C_specific_handler

ntdll

NtReadFile
NtWriteFile
RtlNtStatusToDosError

ole32

CoTaskMemFree

shell32

SHGetKnownFolderPath

ws2_32

WSACleanup
WSAGetLastError
WSASocketW
WSAStartup
closesocket
connect
freeaddrinfo
getaddrinfo
getsockopt
ioctlsocket
recv
select
send
setsockopt

msvcrt

__getmainargs
__initenv
__iob_func
__set_app_type
__setusermatherr
_acmdln
_amsg_exit
_cexit
_commode
_fmode
_fpreset
_initterm
_onexit
abort
calloc
exit
fprintf
free
fwrite
malloc
memcmp
memcpy
memmove
memset
signal
strlen
strncmp
vfprintf

Sections

.text
Size: 291KB - Virtual size: 290KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 1024B - Virtual size: 528B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rdata
Size: 373KB - Virtual size: 373KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.pdata
Size: 9KB - Virtual size: 9KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.xdata
Size: 11KB - Virtual size: 10KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.bss
Size: - Virtual size: 640B

IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 5KB - Virtual size: 4KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.CRT
Size: 512B - Virtual size: 112B

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

.reloc
Size: 1024B - Virtual size: 648B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

c47a2d9faf5e7c2fbf4b1d694d8b3055

Headers

DLL Characteristics

File Characteristics

Imports

advapi32

bcrypt

kernel32

ntdll

ole32

shell32

ws2_32

msvcrt

Sections

.text Size: 291KB - Virtual size: 290KB

.data Size: 1024B - Virtual size: 528B

.rdata Size: 373KB - Virtual size: 373KB

.pdata Size: 9KB - Virtual size: 9KB

.xdata Size: 11KB - Virtual size: 10KB

.bss Size: - Virtual size: 640B

.idata Size: 5KB - Virtual size: 4KB

.CRT Size: 512B - Virtual size: 112B

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

.reloc Size: 1024B - Virtual size: 648B

.text
Size: 291KB - Virtual size: 290KB

.data
Size: 1024B - Virtual size: 528B

.rdata
Size: 373KB - Virtual size: 373KB

.pdata
Size: 9KB - Virtual size: 9KB

.xdata
Size: 11KB - Virtual size: 10KB

.bss
Size: - Virtual size: 640B

.idata
Size: 5KB - Virtual size: 4KB

.CRT
Size: 512B - Virtual size: 112B

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

.reloc
Size: 1024B - Virtual size: 648B