AarSvc[.]dll | Triage

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General

Target

AarSvc.dll
Size

344KB
MD5

39b4ea07b50dbac97b431a1e59d3af95
SHA1

5a77f1de24759b085e3c8bd70a7adecb27e935f4
SHA256

39d0bb9782a8e84780ef4b82eccf5849f334fb8e5a62f7fc188d71a0bf0b74ff
SHA512

48c3005c4caf146f1d074d9bf22119698fa0446715f76956574752e9aded45ddd54c75e42df561d72652b262d10e8afc69897354ffc2fa36f8fe9c74039d3341
SSDEEP

6144:tHsKU810BxgBFdfXR78A6NzopiUdAEuvScQUezznf3itZxSgkLeZ:ti8TBFdfdy0piUdABQUeHm93

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
AarSvc.dll

Files

AarSvc.dll
.dll windows:10 windows x86 arch:x86

b904c5e4fa495ccf4a977a95cf1683bc

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL

PDB Paths

AarSvc.pdb

Imports

api-ms-win-crt-runtime-l1-1-0

_initterm
_initterm_e

api-ms-win-crt-private-l1-1-0

_o__crt_atexit
_o__errno
_o__execute_onexit_table
_o__initialize_narrow_environment
_o__initialize_onexit_table
_o__invalid_parameter_noinfo
_o__invalid_parameter_noinfo_noreturn
_o__purecall
_o__register_onexit_function
_o__seh_filter_dll
memmove
_o_free
_o_malloc
_o_realloc
_o_terminate
_o_toupper
_except_handler4_common
_CxxThrowException
_o___stdio_common_vswprintf
_o___stdio_common_vsnprintf_s
_o__configure_narrow_argv
_o___std_type_info_destroy_list
_o___std_exception_destroy
_o___std_exception_copy
_o__cexit
_o__callnewh
wcschr
__std_terminate
__CxxFrameHandler3
__RTDynamicCast
memcmp
memcpy

api-ms-win-crt-string-l1-1-0

memset

api-ms-win-core-com-l1-1-0

CoRevokeClassObject
CoInitializeSecurity
CoWaitForMultipleHandles
CoReleaseServerProcess
CoTaskMemAlloc
CoDecrementMTAUsage
CoInitializeEx
CoTaskMemFree
CoCreateInstance
CoGetMalloc
CoRegisterClassObject
CoUninitialize
CoAddRefServerProcess
CoCreateFreeThreadedMarshaler
CoResumeClassObjects
CoDisconnectContext

api-ms-win-core-libraryloader-l1-2-0

GetModuleFileNameA
GetModuleHandleW
GetModuleHandleExW
DisableThreadLibraryCalls
GetProcAddress

api-ms-win-security-base-l1-1-0

MakeAbsoluteSD

api-ms-win-core-synch-l1-2-0

InitOnceExecuteOnce
InitOnceComplete
InitOnceBeginInitialize

api-ms-win-core-synch-l1-1-0

DeleteCriticalSection
InitializeCriticalSectionEx
EnterCriticalSection
ReleaseMutex
CreateEventW
ReleaseSRWLockExclusive
ResetEvent
LeaveCriticalSection
InitializeSRWLock
WaitForSingleObject
AcquireSRWLockExclusive
WaitForSingleObjectEx
CreateEventExW
ReleaseSemaphore
OpenSemaphoreW
ReleaseSRWLockShared
CreateMutexExW
AcquireSRWLockShared
CreateMutexW
CreateSemaphoreExW
SetEvent

api-ms-win-core-heap-l1-1-0

HeapAlloc
GetProcessHeap
HeapFree

api-ms-win-core-errorhandling-l1-1-0

GetLastError
SetUnhandledExceptionFilter
UnhandledExceptionFilter
RaiseException
SetLastError

api-ms-win-core-winrt-string-l1-1-0

WindowsDeleteString
WindowsDuplicateString
WindowsGetStringRawBuffer
WindowsIsStringEmpty
WindowsStringHasEmbeddedNull
WindowsCreateString
WindowsCreateStringReference

api-ms-win-security-sddl-l1-1-0

ConvertStringSecurityDescriptorToSecurityDescriptorW

api-ms-win-core-util-l1-1-0

DecodePointer
EncodePointer

api-ms-win-core-processthreads-l1-1-0

TerminateThread
TerminateProcess
GetCurrentProcess
CreateThread
GetCurrentProcessId
GetCurrentThreadId
OpenProcessToken

api-ms-win-core-winrt-l1-1-0

RoUninitialize
RoGetActivationFactory
RoInitialize
RoRevokeActivationFactories
RoRegisterActivationFactories

api-ms-win-core-winrt-error-l1-1-0

RoOriginateError
RoOriginateErrorW
RoTransformError

api-ms-win-core-localization-l1-2-0

FormatMessageW

api-ms-win-core-debug-l1-1-0

OutputDebugStringW
DebugBreak
IsDebuggerPresent

api-ms-win-core-handle-l1-1-0

CloseHandle

api-ms-win-service-core-l1-1-0

SetServiceStatus
RegisterServiceCtrlHandlerExW

api-ms-win-core-processthreads-l1-1-1

IsProcessorFeaturePresent
OpenProcess

api-ms-win-core-profile-l1-1-0

QueryPerformanceCounter

api-ms-win-core-sysinfo-l1-1-0

GetSystemTimeAsFileTime

api-ms-win-core-interlocked-l1-1-0

InitializeSListHead

agentactivationruntime

?ReleaseAgentActivationRuntime@@YGXXZ
?GetLoggerInstance@@YGAAVLogger@VoiceAgentServices@Microsoft@@XZ
?GetAgentActivationRuntime@@YG?AV?$shared_ptr@VIAgentActivationRuntime@VoiceAgentServices@Microsoft@@@std@@XZ
?CreateAgentActivationRuntime@@YG?AV?$shared_ptr@VIAgentActivationRuntime@VoiceAgentServices@Microsoft@@@std@@XZ

combase

ord66
ord68
ord69
ord67

systemeventsbrokerclient

SebEnumerateEventsByType
SebQueryEventPackage

msvcp_win

??4?$_Yarn@D@std@@QAEAAV01@PBD@Z
?_New_Locimp@_Locimp@locale@std@@CAPAV123@ABV123@@Z
?_Xlength_error@std@@YAXPBD@Z
?_Init@locale@std@@CAPAV_Locimp@12@_N@Z
??Bid@locale@std@@QAEIXZ
??1?$codecvt@GDU_Mbstatet@@@std@@MAE@XZ
??0?$codecvt@GDU_Mbstatet@@@std@@QAE@I@Z
?id@?$codecvt@GDU_Mbstatet@@@std@@2V0locale@2@A
?_Xout_of_range@std@@YAXPBD@Z
?out@?$codecvt@GDU_Mbstatet@@@std@@QBEHAAU_Mbstatet@@PBG1AAPBGPAD3AAPAD@Z
?_Addfac@_Locimp@locale@std@@AAEXPAVfacet@23@I@Z
?_Decref@facet@locale@std@@UAEPAV_Facet_base@3@XZ
?_Incref@facet@locale@std@@UAEXXZ

api-ms-win-core-threadpool-l1-2-0

CloseThreadpoolTimer
CreateThreadpoolTimer
WaitForThreadpoolTimerCallbacks
SetThreadpoolTimer

api-ms-win-core-com-l1-1-1

RoGetAgileReference

api-ms-win-core-winrt-error-l1-1-1

RoGetMatchingRestrictedErrorInfo
IsErrorPropagationEnabled
RoReportFailedDelegate

api-ms-win-core-registry-l1-1-0

RegCloseKey
RegSetValueExW
RegGetValueW
RegCreateKeyExW
RegFlushKey
RegQueryValueExW

api-ms-win-eventing-provider-l1-1-0

EventWriteTransfer
EventSetInformation
EventUnregister
EventRegister

api-ms-win-core-registry-l2-1-0

RegOpenKeyW
RegCreateKeyW

ntdll

RtlFreeHeap
NtQueryInformationToken
RtlInitUnicodeString
RtlAllocateHeap
RtlNtStatusToDosErrorNoTeb
RtlCompareUnicodeString

Exports

Exports

DllCanUnloadNow
DllGetActivationFactory
DllGetClassObject
ServiceMain

Sections

.text
Size: 235KB - Virtual size: 235KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 69KB - Virtual size: 70KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 8KB - Virtual size: 7KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 28KB - Virtual size: 28KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

b904c5e4fa495ccf4a977a95cf1683bc

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

api-ms-win-crt-runtime-l1-1-0

api-ms-win-crt-private-l1-1-0

api-ms-win-crt-string-l1-1-0

api-ms-win-core-com-l1-1-0

api-ms-win-core-libraryloader-l1-2-0

api-ms-win-security-base-l1-1-0

api-ms-win-core-synch-l1-2-0

api-ms-win-core-synch-l1-1-0

api-ms-win-core-heap-l1-1-0

api-ms-win-core-errorhandling-l1-1-0

api-ms-win-core-winrt-string-l1-1-0

api-ms-win-security-sddl-l1-1-0

api-ms-win-core-util-l1-1-0

api-ms-win-core-processthreads-l1-1-0

api-ms-win-core-winrt-l1-1-0

api-ms-win-core-winrt-error-l1-1-0

api-ms-win-core-localization-l1-2-0

api-ms-win-core-debug-l1-1-0

api-ms-win-core-handle-l1-1-0

api-ms-win-service-core-l1-1-0

api-ms-win-core-processthreads-l1-1-1

api-ms-win-core-profile-l1-1-0

api-ms-win-core-sysinfo-l1-1-0

api-ms-win-core-interlocked-l1-1-0

agentactivationruntime

combase

systemeventsbrokerclient

msvcp_win

api-ms-win-core-threadpool-l1-2-0

api-ms-win-core-com-l1-1-1

api-ms-win-core-winrt-error-l1-1-1

api-ms-win-core-registry-l1-1-0

api-ms-win-eventing-provider-l1-1-0

api-ms-win-core-registry-l2-1-0

ntdll

Exports

Exports

Sections

.text Size: 235KB - Virtual size: 235KB

.data Size: 69KB - Virtual size: 70KB

.idata Size: 8KB - Virtual size: 7KB

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

.reloc Size: 28KB - Virtual size: 28KB

.text
Size: 235KB - Virtual size: 235KB

.data
Size: 69KB - Virtual size: 70KB

.idata
Size: 8KB - Virtual size: 7KB

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

.reloc
Size: 28KB - Virtual size: 28KB