cyrat | Boostrapper[.]exe

General

Target
Boostrapper.exe
Size 12.6MB
Sample240921-g4algayern
SHA256 4b76ad80e9ce4c503bde0e476a88447426fc38315d440d22926627295e1b0ec6
MD5 d427390e9fad598ec3288c9275c84628
SHA1 7b88e1eaa07151fc0d7639574fc7f40fa5be8aa3
SHA512 83ecc48386999ec6d05999d88e9a81eae5267ea807441727cd60d44f17ead8a0ca6e8a0ffa7d5e4e9fc800d858fb2ee824815abe4299e0ec85639384b75324a8
SSDEEP 393216:prVo+wu2gmnX9c5hlEK/PNMtN3ZW43Q4Eei:prVo+wu2gmNEhxtMtN3r3Q4Ee
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

Malware Config

Signatures

Cyrat executable 1 IoCs

resource	yara_rule
sample	family_cyrat

Cyrat family
cyrat

Detects Pyinstaller 1 IoCs

pyinstaller

resource	yara_rule
sample	pyinstaller

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
Boostrapper.exe

File Explorer

Boostrapper.exe

.exe 12.6MB
Microsoft_dll_fix.pyc

10KB

Boostrapper.exe

IMPHASH 58053a2a3020fdc7713b576ad93bf7bd
SHA256 4b76ad80e9ce4c503bde0e476a88447426fc38315d440d22926627295e1b0ec6
MD5 d427390e9fad598ec3288c9275c84628
SHA1 7b88e1eaa07151fc0d7639574fc7f40fa5be8aa3
SHA512 83ecc48386999ec6d05999d88e9a81eae5267ea807441727cd60d44f17ead8a0ca6e8a0ffa7d5e4e9fc800d858fb2ee824815abe4299e0ec85639384b75324a8
SSDEEP 393216:prVo+wu2gmnX9c5hlEK/PNMtN3ZW43Q4Eei:prVo+wu2gmNEhxtMtN3r3Q4Ee
MD5 SHA1 SHA512 SSDEEP

windows:5 windows x64 arch:x64

Cyrat executable
Detects Pyinstaller

pyinstaller
Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

2

Major OS version

5

Entry point

34388

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_CUI

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

PDB paths

kernel32

GetModuleFileNameW GetProcAddress GetCommandLineW GetEnvironmentVariableW SetEnvironmentVariableW ExpandEnvironmentStringsW GetTempPathW WaitForSingleObject SetDllDirectoryW GetExitCodeProcess CreateProcessW GetStartupInfoW LoadLibraryExW CreateDirectoryW FormatMessageW LoadLibraryA MultiByteToWideChar WideCharToMultiByte Sleep GetLastError SetEndOfFile HeapReAlloc RtlCaptureContext RtlLookupFunctionEntry RtlVirtualUnwind UnhandledExceptionFilter SetUnhandledExceptionFilter GetCurrentProcess TerminateProcess IsProcessorFeaturePresent QueryPerformanceCounter GetCurrentProcessId GetCurrentThreadId GetSystemTimeAsFileTime InitializeSListHead IsDebuggerPresent GetModuleHandleW RtlUnwindEx SetLastError EnterCriticalSection LeaveCriticalSection DeleteCriticalSection InitializeCriticalSectionAndSpinCount TlsAlloc TlsGetValue TlsSetValue TlsFree FreeLibrary GetCommandLineA ReadFile CreateFileW GetDriveTypeW GetFileType CloseHandle PeekNamedPipe SystemTimeToTzSpecificLocalTime FileTimeToSystemTime GetFullPathNameW GetFullPathNameA RemoveDirectoryW FindClose FindFirstFileExW FindNextFileW SetStdHandle SetConsoleCtrlHandler DeleteFileW GetStdHandle WriteFile ExitProcess GetModuleHandleExW GetACP HeapFree HeapAlloc GetConsoleMode ReadConsoleW SetFilePointerEx GetConsoleCP CompareStringW LCMapStringW GetCurrentDirectoryW FlushFileBuffers SetEnvironmentVariableA GetFileAttributesExW IsValidCodePage GetOEMCP GetCPInfo GetEnvironmentStringsW FreeEnvironmentStringsW GetStringTypeW GetProcessHeap WriteConsoleW GetTimeZoneInformation HeapSize RaiseException

advapi32

ConvertStringSecurityDescriptorToSecurityDescriptorW

ws2_32

ntohl

Name

.text

Size

132KB

Virtual Size

131KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

62KB

Virtual Size

61KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

3KB

Virtual Size

44KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

7KB

Virtual Size

7KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.gfids

Size

512B

Virtual Size

172B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.rsrc

Size

122KB

Virtual Size

122KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

2KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

File Explorer

Boostrapper.exe

kernel32

advapi32

ws2_32

generic

Microsoft_dll_fix.pyc