yak[.]exe | Triage

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General

Target

yak.exe
Size

58.2MB
MD5

fa5b95f30e07c3df67ff8f137bdad7f6
SHA1

bfd147bac8cc066280b9fa83088f7786518c1e7e
SHA256

f62b32d3099723ae24346cc161986e47a2af2ae1e59729bbab54ecba6fb13cd5
SHA512

b4771dca7936fd2cbf778f9bba0b13b5bfe189902fcc436c90e8401b5530069d9111cb953437a64ae9d457d3526c2b817b0041d3b609e6c663d5b63c0b0c5380
SSDEEP

393216:E9wQ3nEG3gMgKejPKz1+n15QHV6jzy7EqchRgL:wN3nEQgMgKeTKz1+n1mHyz/Rg

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
yak.exe

Files

yak.exe
.exe windows x64

2180c749687c099ef8bf3ba551bcd0ab

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED

Imports

kernel32

AddVectoredExceptionHandler
AreFileApisANSI
CloseHandle
CreateEventA
CreateFileA
CreateFileMappingA
CreateFileMappingW
CreateFileW
CreateIoCompletionPort
CreateMutexW
CreateThread
CreateWaitableTimerA
CreateWaitableTimerExW
DeleteCriticalSection
DeleteFileA
DeleteFileW
DuplicateHandle
EnterCriticalSection
ExitProcess
FlushFileBuffers
FlushViewOfFile
FormatMessageA
FormatMessageW
FreeEnvironmentStringsW
FreeLibrary
GetConsoleMode
GetCurrentProcess
GetCurrentProcessId
GetCurrentThreadId
GetDiskFreeSpaceA
GetDiskFreeSpaceW
GetEnvironmentStringsW
GetFileAttributesA
GetFileAttributesExW
GetFileAttributesW
GetFileSize
GetFullPathNameA
GetFullPathNameW
GetLastError
GetProcAddress
GetProcessAffinityMask
GetProcessHeap
GetQueuedCompletionStatusEx
GetStartupInfoA
GetStdHandle
GetSystemDirectoryA
GetSystemInfo
GetSystemTime
GetSystemTimeAsFileTime
GetTempPathA
GetTempPathW
GetThreadContext
GetTickCount
GetVersionExA
GetVersionExW
HeapAlloc
HeapCompact
HeapCreate
HeapDestroy
HeapFree
HeapReAlloc
HeapSize
HeapValidate
InitializeCriticalSection
LeaveCriticalSection
LoadLibraryA
LoadLibraryW
LocalFree
LockFile
LockFileEx
MapViewOfFile
MultiByteToWideChar
OutputDebugStringA
OutputDebugStringW
PostQueuedCompletionStatus
QueryPerformanceCounter
ReadFile
ResumeThread
RtlAddFunctionTable
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
SetConsoleCtrlHandler
SetEndOfFile
SetErrorMode
SetEvent
SetFilePointer
SetProcessPriorityBoost
SetThreadContext
SetUnhandledExceptionFilter
SetWaitableTimer
Sleep
SuspendThread
SwitchToThread
SystemTimeToFileTime
TerminateProcess
TlsGetValue
TryEnterCriticalSection
UnhandledExceptionFilter
UnlockFile
UnlockFileEx
UnmapViewOfFile
VirtualAlloc
VirtualFree
VirtualProtect
VirtualQuery
WaitForMultipleObjects
WaitForSingleObject
WaitForSingleObjectEx
WideCharToMultiByte
WriteConsoleW
WriteFile
__C_specific_handler

msvcrt

__getmainargs
__initenv
__iob_func
__lconv_init
__set_app_type
__setusermatherr
_acmdln
_amsg_exit
_beginthread
_beginthreadex
_cexit
_endthreadex
_errno
_fmode
_initterm
_localtime64
_onexit
abort
calloc
exit
fprintf
free
fwrite
malloc
memcmp
memcpy
memmove
memset
qsort
realloc
signal
strcmp
strcspn
strlen
strncmp
vfprintf

Exports

Exports

_cgo_dummy_export
authorizerTrampoline
callbackTrampoline
commitHookTrampoline
compareTrampoline
doneTrampoline
rollbackHookTrampoline
stepTrampoline
updateHookTrampoline

Sections

.text
Size: 22.8MB - Virtual size: 22.8MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 2.8MB - Virtual size: 2.8MB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rdata
Size: 31.3MB - Virtual size: 31.3MB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.pdata
Size: 21KB - Virtual size: 20KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.xdata
Size: 22KB - Virtual size: 22KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.bss
Size: - Virtual size: 7.7MB

IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.edata
Size: 512B - Virtual size: 311B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.idata
Size: 6KB - Virtual size: 5KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.CRT
Size: 512B - Virtual size: 104B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.tls
Size: 512B - Virtual size: 16B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.reloc
Size: 1.2MB - Virtual size: 1.2MB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

2180c749687c099ef8bf3ba551bcd0ab

Headers

DLL Characteristics

File Characteristics

Imports

kernel32

msvcrt

Exports

Exports

Sections

.text Size: 22.8MB - Virtual size: 22.8MB

.data Size: 2.8MB - Virtual size: 2.8MB

.rdata Size: 31.3MB - Virtual size: 31.3MB

.pdata Size: 21KB - Virtual size: 20KB

.xdata Size: 22KB - Virtual size: 22KB

.bss Size: - Virtual size: 7.7MB

.edata Size: 512B - Virtual size: 311B

.idata Size: 6KB - Virtual size: 5KB

.CRT Size: 512B - Virtual size: 104B

.tls Size: 512B - Virtual size: 16B

.reloc Size: 1.2MB - Virtual size: 1.2MB

.text
Size: 22.8MB - Virtual size: 22.8MB

.data
Size: 2.8MB - Virtual size: 2.8MB

.rdata
Size: 31.3MB - Virtual size: 31.3MB

.pdata
Size: 21KB - Virtual size: 20KB

.xdata
Size: 22KB - Virtual size: 22KB

.bss
Size: - Virtual size: 7.7MB

.edata
Size: 512B - Virtual size: 311B

.idata
Size: 6KB - Virtual size: 5KB

.CRT
Size: 512B - Virtual size: 104B

.tls
Size: 512B - Virtual size: 16B

.reloc
Size: 1.2MB - Virtual size: 1.2MB