pre-installer[.]exe

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General

Target
pre-installer.exe
Size 60.7MB
Sample261113-ejba6afy7r
SHA256 b03ec28a86198d4cd8628deb68a7f656411c9a21f6c005f2ed9f962490448c95
MD5 5c79a7a29e37671bc966247baff2a4a0
SHA1 a4ad5fd6ea00b5efe19a0e447eb5de9da4d80de9
SHA512 a0a1a882dd370f3fcdcaf8de104c95c7022e9559f3569a8383e561a820382c88ba8a9b97f4ced1b8e6a24c7a13f9989b1af5542b509b75855a9958bbfb70f1be
SSDEEP 1572864:w9tySxKn8v4JocJ9K9RwDGZgNQo3NVQ0Q3r:uK8v4Joa9K/wDbNQmNVQ0sr
TLSH
T177D73315C6BCAA51C83889B4D04517DB90DA22B72CBEED4C8468EFCEB255C4253B76CF
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
pre-installer.exe

File Explorer

pre-installer.exe

.exe 60.7MB

pre-installer.exe

IMPHASH 7bfe070f9a91bc0c1939ef0f8942109d
SHA256 b03ec28a86198d4cd8628deb68a7f656411c9a21f6c005f2ed9f962490448c95
MD5 5c79a7a29e37671bc966247baff2a4a0
SHA1 a4ad5fd6ea00b5efe19a0e447eb5de9da4d80de9
SHA512 a0a1a882dd370f3fcdcaf8de104c95c7022e9559f3569a8383e561a820382c88ba8a9b97f4ced1b8e6a24c7a13f9989b1af5542b509b75855a9958bbfb70f1be
SSDEEP 1572864:w9tySxKn8v4JocJ9K9RwDGZgNQo3NVQ0Q3r:uK8v4Joa9K/wDbNQmNVQ0sr
TLSH
T177D73315C6BCAA51C83889B4D04517DB90DA22B72CBEED4C8468EFCEB255C4253B76CF
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

5056

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

GetTokenInformation GetUserNameW OpenProcessToken RegCloseKey RegCreateKeyExW RegOpenKeyExW RegSetValueExW

kernel32

CloseHandle CopyFileW CreateDirectoryW CreateFileW CreateMutexW CreateProcessW DeleteCriticalSection EnterCriticalSection ExitProcess ExpandEnvironmentStringsW FreeLibrary GetComputerNameW GetCurrentProcess GetCurrentProcessId GetCurrentThread GetCurrentThreadId GetFileSize GetLastError GetModuleFileNameW GetModuleHandleW GetProcAddress GetStartupInfoW GetSystemInfo GetTempFileNameW GetTempPathW GetThreadContext GetTickCount GlobalMemoryStatusEx InitializeCriticalSection LeaveCriticalSection LoadLibraryA LoadLibraryW QueryPerformanceCounter QueryPerformanceFrequency ReadFile SetEnvironmentVariableW SetUnhandledExceptionFilter Sleep TlsGetValue VirtualAlloc VirtualProtect VirtualQuery WaitForSingleObject WriteFile lstrlenW

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

__p__wenviron

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

_set_new_mode calloc free malloc

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

__setusermatherr

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

__C_specific_handler memcpy wcsrchr

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

__p___argc __p___wargv __p__wcmdln _cexit _configure_wide_argv _crt_atexit _exit _initialize_wide_environment _initterm _set_app_type _set_invalid_parameter_handler abort exit signal

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

__acrt_iob_func __p__commode __p__fmode __stdio_common_vfprintf fwrite

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

memset strlen strncmp wcslen

ntdll

NtQuerySystemInformation

user32

GetSystemMetrics wsprintfW

Name

.text

Size

36KB

Virtual Size

35KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.data

Size

631KB

Virtual Size

631KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rdata

Size

5KB

Virtual Size

4KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.pdata

Size

1024B

Virtual Size

768B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.xdata

Size

1024B

Virtual Size

920B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.bss

Size

Virtual Size

984KB

Characteristics

IMAGE_SCN_CNT_UNINITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.idata

Size

4KB

Virtual Size

3KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.CRT

Size

512B

Virtual Size

96B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.tls

Size

512B

Virtual Size

16B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

60.1MB

Virtual Size

60.1MB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

512B

Virtual Size

148B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

File Explorer

pre-installer.exe

advapi32

kernel32

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

api-ms-win-crt-heap-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

ntdll

user32

generic