Krnl[.]zip | Triage

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General

Target

Krnl.zip
Size

1.1MB
MD5

f38c6d43236970071c9a563fa1ba5132
SHA1

08f45fe2df934cb91cc7c590eba3e5966565fc83
SHA256

06eae26624e6b4ee6a05680dc255648e2833effdd4d11f533e330e0433a0374a
SHA512

6b13adc38b18bbd00c9270b0ea54b15eaedfaa0ebc7a01b6dfdc29c0ca20681a2fd5ff5f61fa265dbf463879f80e90996598a63522296a26858706ff35118cf9
SSDEEP

24576:z/20e1AXSfvvTEwpaoFu6Rwky/J+XRzIYh4tnF9U2gpOFN:z/2HmXywwbFPRuh+B5YMLO

Score

3^/10

Malware Config

Signatures

Unsigned PE 2 IoCs

Checks for missing Authenticode signature.

resource
unpack001/KrnlBootStrapper.exe
unpack001/main.dll

Files

Krnl.zip
.zip
KrnlBootStrapper.exe
.exe windows x86

f34d5f2d4577ed6d9ceec516c1f5a744

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE

Imports

mscoree

_CorExeMain

Sections

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

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rsrc
Size: 1KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 512B - Virtual size: 12B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
main.dll
.dll windows x86

c61169658a92423f3598b3d3c5e94950

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE

Imports

kernel32

TerminateProcess
GetFileAttributesW
OpenProcess
CreateToolhelp32Snapshot
Process32NextW
Process32FirstW
CloseHandle
WriteConsoleW
HeapSize
ReadConsoleW
MultiByteToWideChar
LocalFree
FormatMessageA
GetStringTypeW
CreateFileW
FindClose
FindFirstFileExW
FindNextFileW
SetEndOfFile
SetFilePointerEx
AreFileApisANSI
GetLastError
SetLastError
GetModuleHandleW
GetProcAddress
WideCharToMultiByte
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
EncodePointer
DecodePointer
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
GetSystemTimeAsFileTime
CompareStringW
LCMapStringW
GetLocaleInfoW
GetCPInfo
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetCurrentProcess
IsProcessorFeaturePresent
QueryPerformanceCounter
GetCurrentProcessId
GetCurrentThreadId
InitializeSListHead
IsDebuggerPresent
GetStartupInfoW
RtlUnwind
RaiseException
InterlockedFlushSList
FreeLibrary
LoadLibraryExW
ExitProcess
GetModuleHandleExW
GetModuleFileNameW
FlushFileBuffers
WriteFile
GetConsoleOutputCP
GetConsoleMode
HeapFree
GetFileSizeEx
GetStdHandle
GetFileType
HeapAlloc
IsValidLocale
GetUserDefaultLCID
EnumSystemLocalesW
ReadFile
HeapReAlloc
IsValidCodePage
GetACP
GetOEMCP
GetCommandLineA
GetCommandLineW
GetEnvironmentStringsW
FreeEnvironmentStringsW
SetEnvironmentVariableW
GetProcessHeap
SetStdHandle

user32

MessageBoxA

Exports

Exports

CloseProgram

Sections

.text
Size: 3.9MB - Virtual size: 3.9MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 58KB - Virtual size: 58KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 4KB - Virtual size: 7KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 512B - Virtual size: 480B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 9KB - Virtual size: 9KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

f34d5f2d4577ed6d9ceec516c1f5a744

Headers

DLL Characteristics

File Characteristics

Imports

mscoree

Sections

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

.rsrc Size: 1KB - Virtual size: 1KB

.reloc Size: 512B - Virtual size: 12B

c61169658a92423f3598b3d3c5e94950

Headers

DLL Characteristics

File Characteristics

Imports

kernel32

user32

Exports

Exports

Sections

.text Size: 3.9MB - Virtual size: 3.9MB

.rdata Size: 58KB - Virtual size: 58KB

.data Size: 4KB - Virtual size: 7KB

.rsrc Size: 512B - Virtual size: 480B

.reloc Size: 9KB - Virtual size: 9KB

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

.rsrc
Size: 1KB - Virtual size: 1KB

.reloc
Size: 512B - Virtual size: 12B

.text
Size: 3.9MB - Virtual size: 3.9MB

.rdata
Size: 58KB - Virtual size: 58KB

.data
Size: 4KB - Virtual size: 7KB

.rsrc
Size: 512B - Virtual size: 480B

.reloc
Size: 9KB - Virtual size: 9KB