efsext[.]dll | Triage

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General

Target

efsext.dll
Size

54KB
MD5

12d57310ce78a9221ab6f3ef4b1fd9ad
SHA1

1d5bcca0315774d39f62b03e682942f5de9d00a6
SHA256

794527871454cbcfedc494e2303ebdd1ba2c5406e2be1b0361678a6cd4d34eb5
SHA512

c5f0621c709604c1a35b7f907b522acced7c40769274669414edaf29586fa9816b09c4dff31901199d60f08821cec245835a39853a77f9bde19d21374e676520
SSDEEP

1536:y9uPqRFTNfz+Lp7OhoRl3uSKnFlHjv67:TqDTlepooRUC7

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
efsext.dll

Files

efsext.dll
.dll windows:10 windows x86 arch:x86

915dba9792dc595698b493e7f8d6909d

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

efsext.pdb

Imports

msvcrt

memcpy
_except_handler4_common
??1type_info@@UAE@XZ
_onexit
__dllonexit
__CxxFrameHandler3
_lock
_initterm
malloc
_amsg_exit
_XcptFilter
free
_purecall
wcsncmp
_CxxThrowException
_vsnprintf_s
memcpy_s
_vsnwprintf
??0exception@@QAE@XZ
??0exception@@QAE@ABV0@@Z
_callnewh
wcschr
??1exception@@UAE@XZ
_unlock
memset

api-ms-win-shcore-taskpool-l1-1-0

SHTaskPoolQueueTask

shell32

ord916
ShellExecuteExW
ord155
SHChangeNotifySuspendResume
ord190
ShellExecuteW

dui70

?GetClassInfoPtr@TouchCheckBox@DirectUI@@SGPAUIClassInfo@2@XZ
?GetClassInfoPtr@TouchHyperLink@DirectUI@@SGPAUIClassInfo@2@XZ
UnInitProcessPriv
InitProcessPriv
?VisibleProp@Element@DirectUI@@SGPBUPropertyInfo@2@XZ
?SetValue@Element@DirectUI@@QAEJP6GPBUPropertyInfo@2@XZHPAVValue@2@@Z
?CreateBool@Value@DirectUI@@SGPAV12@_N@Z
?_ZeroRelease@Value@DirectUI@@AAEXXZ
StrToID
?GetCheckedState@TouchCheckBox@DirectUI@@QAE?AW4CheckedStateFlags@2@XZ
?MultipleClick@TouchButton@DirectUI@@SG?AVUID@@XZ
?Click@TouchButton@DirectUI@@SG?AVUID@@XZ
?AddListener@Element@DirectUI@@QAEJPAUIElementListener@2@@Z
?CreateElement@DUIXmlParser@DirectUI@@QAEJPBGPAVElement@2@1PAKPAPAV32@@Z
?SetXMLFromResource@DUIXmlParser@DirectUI@@QAEJIPAUHINSTANCE__@@0@Z
?Create@DUIXmlParser@DirectUI@@SGJPAPAV12@P6GPAVValue@2@PBGPAX@Z2P6GX11H2@Z2@Z
?Destroy@DUIXmlParser@DirectUI@@QAEXXZ
InitThread
UnInitThread
?FindDescendent@Element@DirectUI@@QAEPAV12@G@Z

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

FormatMessageW

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

CreateProcessAsUserW
GetCurrentThread
OpenThreadToken
OpenProcessToken
GetCurrentThreadId
GetCurrentProcessId
TerminateProcess
GetCurrentProcess

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

HeapAlloc
HeapFree
GetProcessHeap

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

LoadStringW
GetModuleHandleW
GetModuleFileNameA
GetProcAddress
LoadResource
GetModuleHandleExW
FindResourceExW
LockResource

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

OutputDebugStringW
DebugBreak
IsDebuggerPresent

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

UnhandledExceptionFilter
GetLastError
SetLastError
SetUnhandledExceptionFilter

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

ReleaseMutex
ReleaseSemaphore
SetEvent
OpenSemaphoreW
WaitForSingleObject
CreateMutexExW
CreateSemaphoreExW
CreateEventW
WaitForSingleObjectEx

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

CloseHandle

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

LocalFree
LocalAlloc

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

CoCreateFreeThreadedMarshaler
CoTaskMemFree
CoInitializeEx
CoTaskMemAlloc
CoGetMalloc
CoUninitialize
CoTaskMemRealloc
CoCreateInstance

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

EqualSid
GetTokenInformation
DuplicateTokenEx
AllocateAndInitializeSid
FreeSid

crypt32

CryptStringToBinaryA
CryptBinaryToStringW

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

CredUnprotectW

rpcrt4

RpcRevertToSelf
RpcImpersonateClient
RpcBindingFromStringBindingW
RpcStringBindingComposeW
RpcBindingSetAuthInfoExW
RpcStringFreeW
NdrClientCall4
RpcBindingFree

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

ConvertStringSidToSidW

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

EventWriteTransfer
EventRegister
EventUnregister
EventSetInformation

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

OpenProcess

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

QueryFullProcessImageNameW

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

RegOpenCurrentUser
RegCreateKeyExW
RegOpenKeyExW
RegQueryValueExW
RegCloseKey

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

GetSystemWindowsDirectoryW
GetSystemTimeAsFileTime
GetTickCount

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

RegDeleteKeyValueW
RegSetKeyValueW

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

Sleep

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

QueryPerformanceCounter

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

CompareStringOrdinal

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

TraceMessage

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

OpenServiceW
CloseServiceHandle
OpenSCManagerW
StartServiceW

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

QueryServiceStatus

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

GetPackageFullName
GetPackageFamilyName
GetCurrentPackageInfo
GetPackageInfo
OpenPackageInfoByFullName
ClosePackageInfo

ntdll

RtlFreeHeap
NtQueryInformationToken
RtlInitUnicodeString
RtlAllocateHeap
RtlNtStatusToDosErrorNoTeb
RtlCompareUnicodeString

user32

MsgWaitForMultipleObjects

api-ms-win-core-delayload-l1-1-1

ResolveDelayLoadedAPI

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

DelayLoadFailureHook

Exports

Exports

EdpPlatform_QueryUserSessionState
EdpPlatform_RegisterUserSessionNotification
EdpPlatform_ShowDialog
EdpPlatform_ShowUI
EdpPlatform_UnregisterUserSessionNotification
EfsPlatform_GetCallerID
EfsPlatform_IsCallerAutomaticallyDelegated
EfsPlatform_LaunchPromptUI
EfsPlatform_SuspendNotificationsAndEncryptFile
EfsPlatform_UnpackSecurePin
FVE_LaunchConsentPromptUI
FVE_LaunchSDCardUI

Sections

.text
Size: 39KB - Virtual size: 39KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 512B - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 7KB - Virtual size: 6KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.didat
Size: 512B - Virtual size: 128B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 3KB - Virtual size: 3KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

915dba9792dc595698b493e7f8d6909d

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

msvcrt

api-ms-win-shcore-taskpool-l1-1-0

shell32

dui70

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

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

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

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

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

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

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

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

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

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

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

crypt32

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

rpcrt4

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

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

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

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

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

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

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

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

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

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

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

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

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

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

ntdll

user32

api-ms-win-core-delayload-l1-1-1

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

Exports

Exports

Sections

.text Size: 39KB - Virtual size: 39KB

.data Size: 512B - Virtual size: 1KB

.idata Size: 7KB - Virtual size: 6KB

.didat Size: 512B - Virtual size: 128B

.rsrc Size: 3KB - Virtual size: 3KB

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

.text
Size: 39KB - Virtual size: 39KB

.data
Size: 512B - Virtual size: 1KB

.idata
Size: 7KB - Virtual size: 6KB

.didat
Size: 512B - Virtual size: 128B

.rsrc
Size: 3KB - Virtual size: 3KB

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