blankgrabber | Boostrapper[.]exe

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General

Target

Boostrapper.exe
Size

57.1MB
MD5

b2d98beb9348ef76d9c198458cb5b6f0
SHA1

47e7744c23443df1075bf9e4e5ecbfd82913933b
SHA256

a29b7a04a02d0aec5075b6c646feaface5b2df34b916a82752d011a7788cc5b2
SHA512

4b3b4055d0ab9d60ee1dc070096d6fdb484fd25e2d6c6e3e2710102bb75868cef47cd729e15f445fac373491263430772fa7c92c49e4580318b07f2136ec3ff0
SSDEEP

786432:+Mbvld15LodEskmtxPa53VXZY6c9Cj4gnjjnrhOVi4otRn8zbCd9pSruBq8Ty/pE:jVshtY5Zc9hgjj1OEFtRDZ/BYwr

Score

10^/10

blankgrabber

Malware Config

Signatures

A stealer written in Python and packaged with Pyinstaller 1 IoCs

resource	yara_rule
static1/unpack001/��1��.pyc	blankgrabber

Blankgrabber family
blankgrabber

Files

Boostrapper.exe
.exe windows:6 windows x64 arch:x64

72c4e339b7af8ab1ed2eb3821c98713a

Code Sign

33:00:00:03:72:31:35:9d:93:ab:3e:7b:1a:00:00:00:00:03:72
Certificate

Issuer

CN=Microsoft Windows Production PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

27/01/2022, 19:31

Not After

26/01/2023, 19:31

Subject

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

Extended Key Usages

ExtKeyUsageCodeSigning

61:07:76:56:00:00:00:00:00:08
Certificate

Issuer

CN=Microsoft Root Certificate Authority 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

19/10/2011, 18:41

Not After

19/10/2026, 18:51

Subject

CN=Microsoft Windows Production PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

75:15:02:0d:ca:03:63:10:30:96:b2:42:35:3a:3b:96:52:18:2a:f5:af:5b:3e:8c:ba:9f:3b:b9:c8:ad:b6:2e
Signer

Actual PE Digest

75:15:02:0d:ca:03:63:10:30:96:b2:42:35:3a:3b:96:52:18:2a:f5:af:5b:3e:8c:ba:9f:3b:b9:c8:ad:b6:2e

Digest Algorithm

sha256

PE Digest Matches

false

Headers

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

Imports

user32

CreateWindowExW
ShutdownBlockReasonCreate
MsgWaitForMultipleObjects
ShowWindow
DestroyWindow
RegisterClassW
DefWindowProcW
PeekMessageW
DispatchMessageW
TranslateMessage
PostMessageW
GetMessageW
MessageBoxW
MessageBoxA
SystemParametersInfoW
DestroyIcon
SetWindowLongPtrW
GetWindowLongPtrW
GetClientRect
InvalidateRect
ReleaseDC
GetDC
DrawTextW
GetDialogBaseUnits
EndDialog
DialogBoxIndirectParamW
MoveWindow
SendMessageW

comctl32

ord380

kernel32

GetACP
IsValidCodePage
GetStringTypeW
GetFileAttributesExW
SetEnvironmentVariableW
FlushFileBuffers
GetCurrentDirectoryW
LCMapStringW
CompareStringW
FlsFree
GetOEMCP
GetCPInfo
GetModuleHandleW
MulDiv
FormatMessageW
GetLastError
GetModuleFileNameW
LoadLibraryExW
SetDllDirectoryW
CreateSymbolicLinkW
GetProcAddress
GetEnvironmentStringsW
GetCommandLineW
GetEnvironmentVariableW
ExpandEnvironmentStringsW
DeleteFileW
FindClose
FindFirstFileW
FindNextFileW
GetDriveTypeW
RemoveDirectoryW
GetTempPathW
CloseHandle
QueryPerformanceCounter
QueryPerformanceFrequency
WaitForSingleObject
Sleep
GetCurrentProcess
TerminateProcess
GetExitCodeProcess
CreateProcessW
GetStartupInfoW
FreeLibrary
LocalFree
SetConsoleCtrlHandler
K32EnumProcessModules
K32GetModuleFileNameExW
CreateFileW
FindFirstFileExW
GetFinalPathNameByHandleW
MultiByteToWideChar
WideCharToMultiByte
FlsSetValue
FreeEnvironmentStringsW
GetProcessHeap
GetTimeZoneInformation
HeapSize
HeapReAlloc
WriteConsoleW
SetEndOfFile
CreateDirectoryW
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
IsProcessorFeaturePresent
GetCurrentProcessId
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
IsDebuggerPresent
RtlUnwindEx
SetLastError
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
EncodePointer
RaiseException
RtlPcToFileHeader
GetCommandLineA
GetFileInformationByHandle
GetFileType
PeekNamedPipe
SystemTimeToTzSpecificLocalTime
FileTimeToSystemTime
ReadFile
GetFullPathNameW
SetStdHandle
GetStdHandle
WriteFile
ExitProcess
GetModuleHandleExW
HeapFree
GetConsoleMode
ReadConsoleW
SetFilePointerEx
GetConsoleOutputCP
GetFileSizeEx
HeapAlloc
FlsAlloc
FlsGetValue

advapi32

OpenProcessToken
GetTokenInformation
ConvertStringSecurityDescriptorToSecurityDescriptorW
ConvertSidToStringSidW

gdi32

SelectObject
DeleteObject
CreateFontIndirectW

Sections

.text
Size: 168KB - Virtual size: 167KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 75KB - Virtual size: 74KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 3KB - Virtual size: 20KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 9KB - Virtual size: 8KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 2KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 2KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
��1��.pyc

Sharing

General

Malware Config

Signatures

Files

72c4e339b7af8ab1ed2eb3821c98713a

Code Sign

33:00:00:03:72:31:35:9d:93:ab:3e:7b:1a:00:00:00:00:03:72Certificate

Extended Key Usages

61:07:76:56:00:00:00:00:00:08Certificate

Key Usages

75:15:02:0d:ca:03:63:10:30:96:b2:42:35:3a:3b:96:52:18:2a:f5:af:5b:3e:8c:ba:9f:3b:b9:c8:ad:b6:2eSigner

Headers

DLL Characteristics

File Characteristics

Imports

user32

comctl32

kernel32

advapi32

gdi32

Sections

.text Size: 168KB - Virtual size: 167KB

.rdata Size: 75KB - Virtual size: 74KB

.data Size: 3KB - Virtual size: 20KB

.pdata Size: 9KB - Virtual size: 8KB

.rsrc Size: 2KB - Virtual size: 2KB

.reloc Size: 2KB - Virtual size: 1KB

33:00:00:03:72:31:35:9d:93:ab:3e:7b:1a:00:00:00:00:03:72
Certificate

61:07:76:56:00:00:00:00:00:08
Certificate

75:15:02:0d:ca:03:63:10:30:96:b2:42:35:3a:3b:96:52:18:2a:f5:af:5b:3e:8c:ba:9f:3b:b9:c8:ad:b6:2e
Signer

.text
Size: 168KB - Virtual size: 167KB

.rdata
Size: 75KB - Virtual size: 74KB

.data
Size: 3KB - Virtual size: 20KB

.pdata
Size: 9KB - Virtual size: 8KB

.rsrc
Size: 2KB - Virtual size: 2KB

.reloc
Size: 2KB - Virtual size: 1KB