WindowsUpdate[.]exe

Sharing

Copy URL Twitter E-mail

General

Target
WindowsUpdate.exe
Size 57KB
Sample261027-rl5c8sdx31
SHA256 c6968a0c9be5844bb63ee816be28c61c0655763229c43dcd734d4653c3ec98cd
MD5 67279132745f464ace06cec5f175b92f
SHA1 24b58cd4dd3cb6f83b35d2ccb281c6723a503a45
SHA512 90811de004d09e8af89149b8dccaecdd1bab34ae284fbb81fd7d0b7ffea2db756371437ad57cf31611fad895649a24d309b12183f006c10f29c767325e1e66f5
SSDEEP 768:n+9uOOOka25B9CM+f3h7GdzM2puBKEOsRWRRRRRRRRRRRRRRRRRRRRRRRRRRRRRg:n+93hkv5B0HkzvuAOjZOjqz
TLSH
T10243090AF603A4ECC866E274EAE66732EF61B85501343B3F6790CF315E54A466E2CD46
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
WindowsUpdate.exe

File Explorer

WindowsUpdate.exe

.exe 57KB

WindowsUpdate.exe

IMPHASH c2c87acc1d2fbc60da91cd5c8e0c09bb
SHA256 c6968a0c9be5844bb63ee816be28c61c0655763229c43dcd734d4653c3ec98cd
MD5 67279132745f464ace06cec5f175b92f
SHA1 24b58cd4dd3cb6f83b35d2ccb281c6723a503a45
SHA512 90811de004d09e8af89149b8dccaecdd1bab34ae284fbb81fd7d0b7ffea2db756371437ad57cf31611fad895649a24d309b12183f006c10f29c767325e1e66f5
SSDEEP 768:n+9uOOOka25B9CM+f3h7GdzM2puBKEOsRWRRRRRRRRRRRRRRRRRRRRRRRRRRRRRg:n+93hkv5B0HkzvuAOjZOjqz
TLSH
T10243090AF603A4ECC866E274EAE66732EF61B85501343B3F6790CF315E54A466E2CD46
MD5 SHA1 SHA512 SSDEEP TLSH

windows:4 windows x64 arch:x64

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

5216

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

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

PDB paths

advapi32

AllocateAndInitializeSid CheckTokenMembership CryptAcquireContextA CryptCreateHash CryptDestroyHash CryptGetHashParam CryptHashData CryptReleaseContext EqualSid FreeSid GetTokenInformation GetUserNameA OpenProcessToken RegCloseKey RegDeleteValueA RegEnumValueA RegOpenKeyExA RegQueryValueExA RegSetValueExA

crypt32

CertCloseStore CertFindCertificateInStore CertFreeCertificateContext CertGetNameStringA CertOpenSystemStoreA CryptMsgClose CryptMsgGetParam CryptQueryObject

iphlpapi

GetExtendedTcpTable SetTcpEntry

kernel32

CloseHandle CopyFileA CreateDirectoryA CreateFileA CreateMutexA CreatePipe CreateProcessA CreateThread CreateToolhelp32Snapshot DeleteFileA ExitProcess FileTimeToSystemTime FindClose FindFirstFileA FindNextFileA FlushFileBuffers GetComputerNameA GetConsoleWindow GetCurrentProcess GetDriveTypeA GetEnvironmentVariableA GetExitCodeProcess GetFileAttributesA GetFileSizeEx GetLastError GetLogicalDrives GetModuleFileNameA GetModuleHandleA GetModuleHandleW GetProcAddress GetProcessTimes GetStartupInfoA GetSystemTimes GetTempPathA GetTickCount GetWindowsDirectoryA GlobalMemoryStatusEx IsDBCSLeadByte K32GetProcessMemoryInfo LocalAlloc LocalFree MoveFileA MultiByteToWideChar OpenProcess Process32First Process32Next ReadFile RemoveDirectoryA SetFileAttributesA SetHandleInformation SetUnhandledExceptionFilter Sleep TerminateProcess TerminateThread VirtualProtect VirtualQuery WaitForSingleObject WriteFile

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

atoi

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

__p__environ

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

_set_new_mode free malloc

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

_configthreadlocale

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

__setusermatherr

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

memcpy strchr strrchr strstr

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

__p___argc __p___argv __p__acmdln _cexit _configure_narrow_argv _crt_atexit _exit _initialize_narrow_environment _seh_filter_exe _initterm _initterm_e _set_app_type _set_invalid_parameter_handler abort exit

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

__acrt_iob_func __p__commode __p__fmode __stdio_common_vfprintf __stdio_common_vsprintf __stdio_common_vsscanf fflush setvbuf

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

memset strcat strcmp strcpy strlen strncat strncmp strncpy strtok

shell32

SHGetFolderPathA ShellExecuteA

urlmon

URLDownloadToFileA

user32

GetLastInputInfo GetTopWindow GetWindow GetWindowTextA GetWindowThreadProcessId IsWindowVisible ShowWindow SystemParametersInfoA

wininet

DeleteUrlCacheEntryA

wintrust

WinVerifyTrust

ws2_32

WSAStartup closesocket connect gethostbyname htons inet_addr inet_ntoa ntohl ntohs recv send socket

Name

.text

Size

35KB

Virtual Size

34KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.data

Size

512B

Virtual Size

448B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rdata

Size

10KB

Virtual Size

10KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.pdata

Size

1024B

Virtual Size

888B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.xdata

Size

1024B

Virtual Size

900B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.bss

Size

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_UNINITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.idata

Size

7KB

Virtual Size

6KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.rsrc

Size

1024B

Virtual Size

800B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

512B

Virtual Size

84B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

File Explorer

WindowsUpdate.exe

advapi32

crypt32

iphlpapi

kernel32

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

api-ms-win-crt-environment-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

shell32

urlmon

user32

wininet

wintrust

ws2_32

generic