efsui[.]exe | Triage

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General

Target

efsui.exe
Size

14KB
MD5

b7b54eb2fb46687264edb25b9adec536
SHA1

9657819143fd2e3c87d0de889b7380851e9cf7f7
SHA256

fe57813687d951ffa8acc02bd4ca2ad8d7d4bc70584072db66c46a404186ddf3
SHA512

eacb9bbbf516c3521d1d16e8e869e87d180c8afbfdffe8cf2a3c1fc51bfae01a983690ef7f2e5df0d4e7f456fb3b45ac3a6a12b7f2ee7a853571a2cc9827d8e7
SSDEEP

384:Xbv3o1u/syTtfHIifI1pIZX34ThWSoRW:rA16siaMIIZn4T2

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
efsui.exe

Files

efsui.exe
.exe windows x64

79780253655b3282fd06ea62fca2f32f

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE

Imports

advapi32

GetTokenInformation
ConvertSidToStringSidW
OpenProcessToken

kernel32

GetCommandLineW
GetCurrentProcess
GetLastError
CreateMutexW
CloseHandle
LocalAlloc
LocalFree

msvcrt

_commode
_acmdln
__C_specific_handler
?terminate@@YAXXZ
__getmainargs
_XcptFilter
_wcsicmp
_fmode
_vsnwprintf
_initterm
__setusermatherr
__set_app_type
exit
_exit
_cexit
_ismbblead
_amsg_exit

efsadu

EfsUIUtilEncryptMyDocuments
EfsUIUtilInstallDra
EfsUIUtilSelectCard
EfsUIUtilShowBalloonAndWait
EfsUIUtilPromptForPin
EfsUIUtilEnrollEfsCertificate
EfsUIUtilKeyBackup

crypt32

CryptBinaryToStringW
CryptStringToBinaryW
CertFreeCertificateContext

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

Sleep

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

GetStartupInfoW
GetCurrentProcessId
TerminateProcess
GetCurrentThreadId

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

UnhandledExceptionFilter
SetUnhandledExceptionFilter

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

GetModuleHandleW

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

QueryPerformanceCounter

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

GetSystemTimeAsFileTime
GetTickCount

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

RtlLookupFunctionEntry
RtlCaptureContext
RtlVirtualUnwind

efsutil

EfsUtilGetCurrentKey

ntdll

RtlImageNtHeader

shell32

CommandLineToArgvW

Sections

.text
Size: 5KB - Virtual size: 4KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 4KB - Virtual size: 4KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 512B - Virtual size: 276B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 2KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 512B - Virtual size: 32B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

79780253655b3282fd06ea62fca2f32f

Headers

DLL Characteristics

File Characteristics

Imports

advapi32

kernel32

msvcrt

efsadu

crypt32

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

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

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

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

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

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

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

efsutil

ntdll

shell32

Sections

.text Size: 5KB - Virtual size: 4KB

.rdata Size: 4KB - Virtual size: 4KB

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

.pdata Size: 512B - Virtual size: 276B

.rsrc Size: 2KB - Virtual size: 1KB

.reloc Size: 512B - Virtual size: 32B

.text
Size: 5KB - Virtual size: 4KB

.rdata
Size: 4KB - Virtual size: 4KB

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

.pdata
Size: 512B - Virtual size: 276B

.rsrc
Size: 2KB - Virtual size: 1KB

.reloc
Size: 512B - Virtual size: 32B