Windows11InstallationAssistant[.]exe

Sharing

Copy URL Twitter E-mail

General

Target

Windows11InstallationAssistant.exe
Size

4.0MB
MD5

0b11e5d702862fd1e963fe39add3ea82
SHA1

5d9dc8c868e79abab809531f2368d9f5dc9fc5d3
SHA256

9d04e6c0eef448763ad50bf094c8076f4ce6673a83232fb200355f20f77f021a
SHA512

baa7a805130548550f097f978069b9c25a07ea8d12fe6213487ed227d8ff13df4c1b1de2bb956bc68b1642c23c8c3f8d3e212234ce78a6f64c2a014d10e4aca0
SSDEEP

98304:ofiCjp+HcgoLIkLXvkIdsEr4N+dPDr92uQqvAV2ht5fDC3jKR:ofiopIr/+X8QsEr44dPx4gDC3j0

Score

1^/10

Malware Config

Signatures

Files

Windows11InstallationAssistant.exe
.exe windows:10 windows x86 arch:x86

19087022d5d8cff30577ddd6e0e647a9

Code Sign

33:00:00:01:df:6b:f0:2e:92:a7:4a:b4:d0:00:00:00:00:01:df
Certificate

Issuer

CN=Microsoft Code Signing PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

15/12/2020, 21:31

Not After

02/12/2021, 21:31

Subject

CN=Microsoft Corporation,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Extended Key Usages

ExtKeyUsageCodeSigning

61:0e:90:d2:00:00:00:00:00:03
Certificate

Issuer

CN=Microsoft Root Certificate Authority 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

08/07/2011, 20:59

Not After

08/07/2026, 21:09

Subject

CN=Microsoft Code Signing PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

ac:16:af:04:c7:e6:93:b8:59:f8:27:38:26:33:cf:4d:64:59:41:3a:c5:7d:65:74:7e:68:c4:b7:27:23:cc:5f
Signer

Actual PE Digest

ac:16:af:04:c7:e6:93:b8:59:f8:27:38:26:33:cf:4d:64:59:41:3a:c5:7d:65:74:7e:68:c4:b7:27:23:cc:5f

Digest Algorithm

sha256

PE Digest Matches

true

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

upgraderstub.pdb

Imports

advapi32

EnableTraceEx2
RegQueryValueExW
ConvertStringSecurityDescriptorToSecurityDescriptorW
QueryTraceW
EventUnregister
ControlTraceW
RegOpenKeyExW
RegSetValueExW
RegSetKeySecurity
EventSetInformation
RegCreateKeyExW
RegDeleteKeyW
EventRegister
EventWriteTransfer
RegCloseKey
StartTraceW
GetSecurityDescriptorDacl
AdjustTokenPrivileges
OpenProcessToken
GetSecurityDescriptorOwner
GetSecurityDescriptorGroup
GetSecurityDescriptorSacl
GetSecurityDescriptorControl
GetSecurityDescriptorLength
GetAclInformation
RevertToSelf
OpenEncryptedFileRawW
WriteEncryptedFileRaw
CloseEncryptedFileRaw

kernel32

GetVolumePathNamesForVolumeNameW
TlsSetValue
TlsGetValue
TlsFree
TlsAlloc
WaitForMultipleObjectsEx
GlobalMemoryStatusEx
GetVolumeInformationByHandleW
UnmapViewOfFile
MapViewOfFile
CreateFileMappingW
CreateSemaphoreW
WaitForMultipleObjects
GetPrivateProfileSectionW
UnlockFileEx
LockFileEx
InitializeCriticalSectionAndSpinCount
CreateEventW
GetVolumeInformationW
GetCurrentThread
SetThreadIdealProcessor
GetSystemInfo
GetOverlappedResult
GetHandleInformation
DeleteCriticalSection
LocalFree
CreateThread
GlobalFree
DeleteFileW
InitOnceComplete
GetExitCodeThread
GetFileAttributesW
LocalAlloc
CreateMutexW
GetTempPathW
GetEnvironmentVariableW
InitializeCriticalSection
LeaveCriticalSection
GetModuleFileNameW
GetFullPathNameW
GetCommandLineW
EnterCriticalSection
CompareStringW
WritePrivateProfileStringW
InitOnceBeginInitialize
CreateDirectoryW
IsDebuggerPresent
DebugBreak
GetModuleHandleW
GetProcessHeap
GetCurrentProcessId
CreateMutexExW
GetProcAddress
HeapAlloc
CloseHandle
OpenSemaphoreW
WaitForSingleObjectEx
OutputDebugStringW
GetLastError
FormatMessageW
ReleaseMutex
GetCurrentThreadId
WaitForSingleObject
GetModuleHandleExW
ReleaseSemaphore
SetLastError
HeapFree
CreateSemaphoreExW
GetModuleFileNameA
GetTempFileNameW
GetStartupInfoW
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetCurrentProcess
TerminateProcess
QueryPerformanceCounter
GetSystemTimeAsFileTime
GetTickCount
GetFileInformationByHandleEx
FindFirstFileW
FindNextFileW
DeviceIoControl
FindClose
CreateFileW
SetFileAttributesW
GetFileInformationByHandle
SetFileInformationByHandle
CopyFileExW
FlushFileBuffers
GetFileSizeEx
GetCurrentDirectoryW
FreeLibrary
LoadLibraryExW
GetLongPathNameW
GetFinalPathNameByHandleW
GetVolumePathNameW
GetVolumeNameForVolumeMountPointW
GetDriveTypeW
SetEvent
ResetEvent
WideCharToMultiByte
MultiByteToWideChar
GetSystemTime
GetTimeZoneInformation
SystemTimeToTzSpecificLocalTime
RemoveDirectoryW
CreateFileA
GlobalAlloc
SetFilePointerEx
ReadFile
WriteFile
SetFilePointer
HeapReAlloc
HeapSize
GetShortPathNameW
SetEndOfFile
DuplicateHandle
SetFileTime
LocalFileTimeToFileTime
DosDateTimeToFileTime
OpenProcess
OpenMutexW
LoadLibraryW
MoveFileW
Sleep
VerifyVersionInfoW
GetSystemWindowsDirectoryW
VerSetConditionMask

user32

CharUpperW
LoadStringW
MessageBoxW

msvcrt

iswspace
_wcsicmp
memcmp
memcpy
memmove
vswprintf_s
towupper
_vscwprintf
_vsnprintf
_wcsnicmp
wcsrchr
strcpy_s
qsort
_except_handler4_common
_controlfp
??1type_info@@UAE@XZ
?terminate@@YAXXZ
_onexit
__dllonexit
_unlock
_lock
_acmdln
_initterm
__setusermatherr
_ismbblead
__p__fmode
_cexit
_exit
exit
__set_app_type
__getmainargs
_amsg_exit
__p__commode
_XcptFilter
_CxxThrowException
sprintf_s
memmove_s
wcschr
??0exception@@QAE@ABQBD@Z
?what@exception@@UBEPBDXZ
_purecall
iswdigit
wcsnlen
_vsnprintf_s
??0exception@@QAE@ABV0@@Z
??0exception@@QAE@XZ
??1exception@@UAE@XZ
memcpy_s
_vsnwprintf
__CxxFrameHandler3
swscanf_s
wcsncmp
wcsstr
memset

ole32

CoInitialize
CoTaskMemFree
CoCreateInstance
CoUninitialize

rpcrt4

RpcStringFreeW
UuidCreate
UuidToStringW

shell32

CommandLineToArgvW
ShellExecuteExW
SHGetSpecialFolderPathW
SHChangeNotify
SHGetFolderPathW

shlwapi

StrStrIW
PathFileExistsW
PathFindFileNameW
PathRemoveFileSpecW

cabinet

ord22
ord20
ord23

version

GetFileVersionInfoSizeW
GetFileVersionInfoW
VerQueryValueW

ntdll

NtYieldExecution
DbgPrintEx
NtQueryInformationFile
RtlAdjustPrivilege
RtlGetLastNtStatus
RtlSetControlSecurityDescriptor
RtlFindAceByType
NtSetSecurityObject
NtQueryVolumeInformationFile
NtQueryInformationProcess
RtlDosPathNameToNtPathName_U
NtCreateFile
NtClose
RtlInitializeResource
RtlAcquireResourceExclusive
RtlAcquireResourceShared
RtlReleaseResource
RtlDeleteResource
RtlImpersonateSelf
NtSetEaFile
RtlFreeHeap
RtlAllocateHeap
RtlNtStatusToDosError
NtSetInformationFile
RtlReAllocateHeap
RtlRaiseStatus

psapi

GetModuleFileNameExW
EnumProcesses

bcrypt

BCryptCreateHash
BCryptHashData
BCryptDestroyHash
BCryptCloseAlgorithmProvider
BCryptFinishHash
BCryptOpenAlgorithmProvider
BCryptGetProperty

Sections

.text
Size: 472KB - Virtual size: 471KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 1KB - Virtual size: 7KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 8KB - Virtual size: 7KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.boxload
Size: 512B - Virtual size: 140B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 262KB - Virtual size: 264KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 16KB - Virtual size: 15KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

19087022d5d8cff30577ddd6e0e647a9

Code Sign

33:00:00:01:df:6b:f0:2e:92:a7:4a:b4:d0:00:00:00:00:01:dfCertificate

Extended Key Usages

61:0e:90:d2:00:00:00:00:00:03Certificate

Key Usages

ac:16:af:04:c7:e6:93:b8:59:f8:27:38:26:33:cf:4d:64:59:41:3a:c5:7d:65:74:7e:68:c4:b7:27:23:cc:5fSigner

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

advapi32

kernel32

user32

msvcrt

ole32

rpcrt4

shell32

shlwapi

cabinet

version

ntdll

psapi

bcrypt

Sections

.text Size: 472KB - Virtual size: 471KB

.data Size: 1KB - Virtual size: 7KB

.idata Size: 8KB - Virtual size: 7KB

.boxload Size: 512B - Virtual size: 140B

.rsrc Size: 262KB - Virtual size: 264KB

.reloc Size: 16KB - Virtual size: 15KB

33:00:00:01:df:6b:f0:2e:92:a7:4a:b4:d0:00:00:00:00:01:df
Certificate

61:0e:90:d2:00:00:00:00:00:03
Certificate

ac:16:af:04:c7:e6:93:b8:59:f8:27:38:26:33:cf:4d:64:59:41:3a:c5:7d:65:74:7e:68:c4:b7:27:23:cc:5f
Signer

.text
Size: 472KB - Virtual size: 471KB

.data
Size: 1KB - Virtual size: 7KB

.idata
Size: 8KB - Virtual size: 7KB

.boxload
Size: 512B - Virtual size: 140B

.rsrc
Size: 262KB - Virtual size: 264KB

.reloc
Size: 16KB - Virtual size: 15KB