blankgrabber | UPGRADER[.]exe

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General

Target

UPGRADER.exe
Size

6.9MB
MD5

94e23cdd6b08b5676c3a26ec85236966
SHA1

02af1dc4444df4ccd2d9c44ad0e5bdb5ca7ac5fe
SHA256

bf1bf24d9ea04f41a0d819cf26ea74c1a2d13395dc85860e8945d20e11d2158a
SHA512

fed3b600d45bf8447b335eecb3c8bd1e8ac33bf8efb3e4ec5a2d804e6f2fc615d90894625c0320b79113a77248d597a1923eb3b09f2109ada44ce0e0b547c181
SSDEEP

196608:grGT0cKeNTfm/pf+xk4dWRGtrbWOjgWy4:Ry/pWu4kRGtrbvMWy4

Score

10^/10

blankgrabber

Malware Config

Signatures

A stealer written in Python and packaged with Pyinstaller 1 IoCs

Processes:

resource	yara_rule
static1/unpack001/��c^.pyc	blankgrabber

Blankgrabber family
blankgrabber

Files

UPGRADER.exe
.exe windows:5 windows x64 arch:x64

f4f2e2b03fe5666a721620fcea3aea9b

Code Sign

33:00:00:04:60:cf:42:a9:12:31:5f:6f:b3:00:00:00:00:04:60
Certificate

Issuer

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

Not Before

16-11-2023 19:20

Not After

14-11-2024 19:20

Subject

CN=Microsoft Windows,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

47:87:ff:ea:c1:88:90:6a:d3:fb:07:a3:3b:ed:9e:60:c7:5c:c0:96:a8:c8:da:3d:b5:e4:7d:1f:f5:6a:c5:d8
Signer

Actual PE Digest

47:87:ff:ea:c1:88:90:6a:d3:fb:07:a3:3b:ed:9e:60:c7:5c:c0:96:a8:c8:da:3d:b5:e4:7d:1f:f5:6a:c5:d8

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
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

Sections

.text
Size: 172KB - Virtual size: 171KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 76KB - Virtual size: 75KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 3KB - Virtual size: 12KB

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

_RDATA
Size: 512B - Virtual size: 500B

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
��c^.pyc

Sharing

General

Malware Config

Signatures

Files

f4f2e2b03fe5666a721620fcea3aea9b

Code Sign

33:00:00:04:60:cf:42:a9:12:31:5f:6f:b3:00:00:00:00:04:60Certificate

Extended Key Usages

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

Key Usages

47:87:ff:ea:c1:88:90:6a:d3:fb:07:a3:3b:ed:9e:60:c7:5c:c0:96:a8:c8:da:3d:b5:e4:7d:1f:f5:6a:c5:d8Signer

Headers

DLL Characteristics

File Characteristics

Imports

user32

comctl32

kernel32

advapi32

gdi32

Sections

.text Size: 172KB - Virtual size: 171KB

.rdata Size: 76KB - Virtual size: 75KB

.data Size: 3KB - Virtual size: 12KB

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

_RDATA Size: 512B - Virtual size: 500B

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

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

33:00:00:04:60:cf:42:a9:12:31:5f:6f:b3:00:00:00:00:04:60
Certificate

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

47:87:ff:ea:c1:88:90:6a:d3:fb:07:a3:3b:ed:9e:60:c7:5c:c0:96:a8:c8:da:3d:b5:e4:7d:1f:f5:6a:c5:d8
Signer

.text
Size: 172KB - Virtual size: 171KB

.rdata
Size: 76KB - Virtual size: 75KB

.data
Size: 3KB - Virtual size: 12KB

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

_RDATA
Size: 512B - Virtual size: 500B

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

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