cstealer[.]exe | Triage™

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General

Target
cstealer.exe
Size 13.5MB
Sample240829-a8cs3axckj
SHA256 6c5b3f7398c08ccdb971b650ccb66fad2237b97fe86e385b1c29560774f9c9f7
MD5 ca4ebb72bb9d1103e8f80573676e2ad2
SHA1 bf11c20fe01a8bf99fdc4eed31cff8b29a4abc89
SHA512 21f7514377ba2bb270c53c03227f1c5e2e300a2c0f95b4f24b63cddb3549de92e105eca67af247dbdae5ee317becd6e7190a38f2348a67bdc743f953aaf2aa6a
SSDEEP 196608:Wh2gXEkwAcewuLIqBA1HeT39IigwE1ncKOVVtd97w/hk1sxtQvN+KcWQiZj20M:SEkwAc1Kq1+TtIiFg0VBxwWa60KVRK
MD5 SHA1 SHA512 SSDEEP

Score

3^/10

pyinstaller

Malware Config

Signatures

Detects Pyinstaller 1 IoCs

pyinstaller

resource	yara_rule
sample	pyinstaller

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
cstealer.exe

File Explorer

cstealer.exe

.exe 13.5MB
cstealer.pyc

67KB

cstealer.exe

IMPHASH f4f2e2b03fe5666a721620fcea3aea9b
SHA256 6c5b3f7398c08ccdb971b650ccb66fad2237b97fe86e385b1c29560774f9c9f7
MD5 ca4ebb72bb9d1103e8f80573676e2ad2
SHA1 bf11c20fe01a8bf99fdc4eed31cff8b29a4abc89
SHA512 21f7514377ba2bb270c53c03227f1c5e2e300a2c0f95b4f24b63cddb3549de92e105eca67af247dbdae5ee317becd6e7190a38f2348a67bdc743f953aaf2aa6a
SSDEEP 196608:Wh2gXEkwAcewuLIqBA1HeT39IigwE1ncKOVVtd97w/hk1sxtQvN+KcWQiZj20M:SEkwAc1Kq1+TtIiFg0VBxwWa60KVRK
MD5 SHA1 SHA512 SSDEEP

windows:5 windows x64 arch:x64

Detects Pyinstaller

pyinstaller
Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

50496

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA 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_LARGE_ADDRESS_AWARE

PDB paths

user32

CreateWindowExW PostMessageW GetMessageW MessageBoxW MessageBoxA SystemParametersInfoW DestroyIcon SetWindowLongPtrW GetWindowLongPtrW GetClientRect InvalidateRect ReleaseDC GetDC DrawTextW GetDialogBaseUnits EndDialog DialogBoxIndirectParamW MoveWindow SendMessageW

comctl32

ord380

kernel32

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

advapi32

OpenProcessToken GetTokenInformation ConvertStringSecurityDescriptorToSecurityDescriptorW ConvertSidToStringSidW

gdi32

SelectObject DeleteObject CreateFontIndirectW

Name

.text

Size

172KB

Virtual Size

171KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

76KB

Virtual Size

75KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

3KB

Virtual Size

12KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

9KB

Virtual Size

8KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

_RDATA

Size

512B

Virtual Size

500B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.rsrc

Size

61KB

Virtual Size

61KB

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

cstealer.exe

user32

comctl32

kernel32

advapi32

gdi32

generic

cstealer.pyc