kb[.]dll | Triage

Sharing

Copy URL Twitter E-mail

General

Target

kb.dll
Size

684KB
MD5

f0f94cdd12c631aec2ebba11fece43cd
SHA1

9f791b00773f31e25818d318e354506491af0f34
SHA256

31bf3ba3eeb1b10ba16c23fbe8ff21e99e512b41973f4689d7f842b4788f80b9
SHA512

009144dc9e7e96d1aad44cf8ddd74392f25919783da4a05059d7f7edbd0c18512d33618777ddcead815628e99d3102cc493c1c749d5950602ac913c0c58154f4
SSDEEP

12288:gkF5tBjoGKRA7P6gKZDRasaUaQ8xNeVUTOqdA:g6oTA7P6t0Caxx+jqy

Score

1^/10

Malware Config

Signatures

Files

kb.dll
.dll windows:6 windows x64 arch:x64

7e7d53d50cde087bbec1e11952e1efcf

Code Sign

15:a6:fa:31:69:53:19:ab:41:e8:95:93:26:8e:ea:e3
Certificate

Issuer

CN=Microsoft Corporation,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

12/05/2023, 19:49

Not After

11/05/2025, 18:53

Subject

CN=Microsoft Corporation,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature

a1:a3:13:fe:f3:71:b5:0b:13:30:7c:ea:4a:82:f7:73:fb:57:cc:24:f8:63:3c:cf:85:c1:96:56:3b:11:9a:fc
Signer

Actual PE Digest

a1:a3:13:fe:f3:71:b5:0b:13:30:7c:ea:4a:82:f7:73:fb:57:cc:24:f8:63:3c:cf:85:c1:96:56:3b:11:9a:fc

Digest Algorithm

sha256

PE Digest Matches

false

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DLL

Imports

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

__acrt_iob_func
__stdio_common_vfprintf
__stdio_common_vsprintf
_fileno
_setmode
fflush
fputc
fwrite

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

__p__environ
_putenv
_wgetenv
_wputenv
getenv

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

_cexit
_configure_narrow_argv
_crt_atexit
_errno
_execute_onexit_table
_initialize_narrow_environment
_initialize_onexit_table
_initterm
_initterm_e
_register_onexit_function
_seh_filter_dll
abort
exit
signal
terminate

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

_localtime64

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

calloc
free
malloc

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

mbstowcs_s
strtod
wcstombs

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

memset
strlen
wcsncmp

kernel32

AllocConsole
CloseHandle
CreateThread
DeleteCriticalSection
EnterCriticalSection
FreeConsole
FreeLibrary
GetConsoleWindow
GetCurrentProcess
GetCurrentProcessId
GetCurrentThreadId
GetLastError
GetModuleHandleA
GetProcAddress
GetProcessHeap
GetStdHandle
GetSystemTimeAsFileTime
HeapAlloc
InitializeCriticalSection
InitializeCriticalSectionAndSpinCount
InitializeSListHead
InterlockedFlushSList
IsDebuggerPresent
IsProcessorFeaturePresent
LeaveCriticalSection
LoadLibraryA
LoadLibraryExW
QueryPerformanceCounter
RtlCaptureContext
RtlLookupFunctionEntry
RtlUnwindEx
RtlVirtualUnwind
SetLastError
SetStdHandle
SetUnhandledExceptionFilter
TerminateProcess
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
TryEnterCriticalSection
UnhandledExceptionFilter
VirtualAlloc
VirtualFree
WaitForSingleObject

Exports

Exports

Win32AcceptChecks

Sections

.text
Size: 571KB - Virtual size: 570KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 29KB - Virtual size: 28KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 56KB - Virtual size: 413KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 4KB - Virtual size: 3KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

7e7d53d50cde087bbec1e11952e1efcf

Code Sign

15:a6:fa:31:69:53:19:ab:41:e8:95:93:26:8e:ea:e3Certificate

Extended Key Usages

Key Usages

a1:a3:13:fe:f3:71:b5:0b:13:30:7c:ea:4a:82:f7:73:fb:57:cc:24:f8:63:3c:cf:85:c1:96:56:3b:11:9a:fcSigner

Headers

DLL Characteristics

File Characteristics

Imports

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

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

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

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

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

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

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

kernel32

Exports

Exports

Sections

.text Size: 571KB - Virtual size: 570KB

.rdata Size: 29KB - Virtual size: 28KB

.data Size: 56KB - Virtual size: 413KB

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

.reloc Size: 4KB - Virtual size: 3KB

15:a6:fa:31:69:53:19:ab:41:e8:95:93:26:8e:ea:e3
Certificate

a1:a3:13:fe:f3:71:b5:0b:13:30:7c:ea:4a:82:f7:73:fb:57:cc:24:f8:63:3c:cf:85:c1:96:56:3b:11:9a:fc
Signer

.text
Size: 571KB - Virtual size: 570KB

.rdata
Size: 29KB - Virtual size: 28KB

.data
Size: 56KB - Virtual size: 413KB

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

.reloc
Size: 4KB - Virtual size: 3KB