amstream[.]dll

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General

Target

amstream.dll
Size

64KB
MD5

6ce67bf5c3e07ea0e65e4c1551024725
SHA1

75e0b0d87d288f4046bf2b098617cae13ae55eec
SHA256

eb2309ea387d38c5a3f74889898b922179dd41dd2bb8d41cba7cef64447f8332
SHA512

d325b0e13ccbe6f27f2dceb5567483b4e27221d122c848e2b5232c6a8effac044c299dd1136c4b3f5d97c92d7082fcedb6882f55866ef7ee25fc27b0d2125c43
SSDEEP

1536:/u/4+dobWHmm3bKiDcOtitOJo2T0Tu6meDRmHw38Cy:/04zW5OnkHJFIT/mMRm28C

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
amstream.dll

Files

amstream.dll
.dll regsvr32 windows:6 windows x86 arch:x86

04afdcd20d30881952cfd312348e831d

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL

PDB Paths

amstream.pdb

Imports

msvcrt

_vsnwprintf
memcmp
memcpy
??_U@YAPAXI@Z
_except_handler4_common
_initterm
_amsg_exit
_XcptFilter
_purecall
??2@YAPAXI@Z
realloc
??3@YAXPAX@Z
??_V@YAXPAX@Z
malloc
free
memset

kernel32

GetLastError
GetProcAddress
EnterCriticalSection
lstrcmpiW
DeleteCriticalSection
GetCurrentThreadId
CloseHandle
lstrcpyW
DisableThreadLibraryCalls
SetEvent
ResetEvent
CreateEventW
Sleep
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TerminateProcess
QueryPerformanceCounter
GetCurrentProcessId
GetSystemTimeAsFileTime
GetTickCount
ReleaseSemaphore
CreateSemaphoreW
MulDiv
CreateThread
GetModuleFileNameW
DuplicateHandle
lstrcmpW
MultiByteToWideChar
lstrcpynW
LeaveCriticalSection
HeapDestroy
SizeofResource
LoadLibraryW
InitializeCriticalSection
GetCurrentThread
GetModuleHandleW
WaitForSingleObject
GetCurrentProcess
LoadLibraryExW
LoadResource
FreeLibrary
FindResourceW
QueueUserAPC

user32

IsRectEmpty
CharNextW

advapi32

RegEnumKeyExW
RegOpenKeyExW
RegDeleteValueW
RegQueryInfoKeyW
RegQueryValueExW
RegCreateKeyExW
RegCloseKey
RegSetValueExW
RegDeleteKeyW

ole32

CoTaskMemAlloc
CoTaskMemFree
CoTaskMemRealloc
CoCreateInstance

oleaut32

SysFreeString
RegisterTypeLi
VarI4FromStr
LoadTypeLi

ddraw

DirectDrawCreate

Exports

Exports

DllCanUnloadNow
DllGetClassObject
DllRegisterServer
DllUnregisterServer

Sections

.text
Size: 53KB - Virtual size: 52KB

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: 2KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 3KB - Virtual size: 2KB

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

04afdcd20d30881952cfd312348e831d

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

msvcrt

kernel32

user32

advapi32

ole32

oleaut32

ddraw

Exports

Exports

Sections

.text Size: 53KB - Virtual size: 52KB

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

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

.rsrc Size: 3KB - Virtual size: 2KB

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

.text
Size: 53KB - Virtual size: 52KB

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

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

.rsrc
Size: 3KB - Virtual size: 2KB

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