Static task
static1
Behavioral task
behavioral1
Sample
cumloader.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
cumloader.exe
Resource
win10v2004-20230220-en
General
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Target
cumloader.exe
-
Size
326KB
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MD5
d20d31a0e64cf722051a8fb411748913
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SHA1
6a38bf745dea8818ee00891231878b2a27a93293
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SHA256
c78bc4fb8955940b3ac9b52cb16744a61f8bdaf673fd64fc106465241c56cc6c
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SHA512
7b30675905e7d1b6becc52469a04f62d51d59048a490913c75c894c10aadb9119ef311272adbef6dad4b5f1ef5beeecd6695cc97c23c13becd0ffd66afbd5267
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SSDEEP
6144:GAvSVEiHRUTuLcYWWxAYkhLSxjKX929JqT+8F:SEiHRsuLFWUAY+LSxjJ6+s
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource cumloader.exe
Files
-
cumloader.exe.exe windows x86
b8e0cca9c8daf9ab8d5b3be250b7f319
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
Imports
kernel32
GetLogicalDriveStringsW
CancelWaitableTimer
SetComputerNameW
SetEvent
GetProcessPriorityBoost
GetModuleHandleW
EnumCalendarInfoExW
GetConsoleTitleA
ReadConsoleW
TlsSetValue
GlobalAlloc
FatalAppExitW
GetVersionExW
GetStringTypeExW
HeapDestroy
GlobalFlags
DnsHostnameToComputerNameW
FindNextVolumeW
GetConsoleAliasW
IsDBCSLeadByte
GetModuleFileNameW
CreateActCtxA
lstrlenW
ReplaceFileA
GetTempPathW
CreateJobObjectA
GetLargestConsoleWindowSize
InterlockedDecrement
GetLastError
SetLastError
ReadConsoleOutputCharacterA
GetProcAddress
AttachConsole
VirtualAlloc
LocalLock
ReadFileEx
GetTempFileNameA
LoadLibraryA
InterlockedExchangeAdd
CreateFileMappingA
LocalAlloc
DnsHostnameToComputerNameA
FindFirstVolumeMountPointW
GetNumberFormatW
OpenEventA
FindAtomA
GetTapeParameters
GetDefaultCommConfigA
GetModuleHandleA
SetLocaleInfoW
GetConsoleTitleW
ScrollConsoleScreenBufferA
GetWindowsDirectoryW
AddConsoleAliasA
DebugBreak
EnumSystemLocalesW
GetConsoleAliasesLengthW
lstrlenA
SetProcessAffinityMask
FindFirstChangeNotificationW
SetThreadContext
WideCharToMultiByte
InterlockedIncrement
InterlockedCompareExchange
InterlockedExchange
MultiByteToWideChar
Sleep
InitializeCriticalSection
DeleteCriticalSection
EnterCriticalSection
LeaveCriticalSection
HeapFree
HeapAlloc
TerminateProcess
GetCurrentProcess
UnhandledExceptionFilter
SetUnhandledExceptionFilter
IsDebuggerPresent
GetCommandLineA
GetStartupInfoA
GetCPInfo
RtlUnwind
RaiseException
LCMapStringW
LCMapStringA
GetStringTypeW
HeapCreate
VirtualFree
HeapReAlloc
ExitProcess
WriteFile
GetStdHandle
GetModuleFileNameA
TlsGetValue
TlsAlloc
TlsFree
GetCurrentThreadId
FreeEnvironmentStringsA
GetEnvironmentStrings
FreeEnvironmentStringsW
GetEnvironmentStringsW
SetHandleCount
GetFileType
QueryPerformanceCounter
GetTickCount
GetCurrentProcessId
GetSystemTimeAsFileTime
GetStringTypeA
HeapSize
GetACP
GetOEMCP
IsValidCodePage
GetUserDefaultLCID
GetLocaleInfoA
EnumSystemLocalesA
IsValidLocale
InitializeCriticalSectionAndSpinCount
GetLocaleInfoW
user32
CharLowerBuffW
gdi32
GetCharWidthW
EnumFontsW
GetCharABCWidthsFloatW
advapi32
MapGenericMask
Sections
.text Size: 189KB - Virtual size: 189KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.data Size: 7KB - Virtual size: 4.8MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 108KB - Virtual size: 108KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 20KB - Virtual size: 19KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ