amstream[.]dll

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General

Target

amstream.dll
Size

75KB
MD5

32c060396da3dba6b68e884c2329de19
SHA1

02e95cf9a39d4797bac1fe7562e0053685779f83
SHA256

8f487211365c5e7c69d63e3c35bf064e940055b3f56b71b537138541f09fc8fc
SHA512

53470f8fbe155a0868571e575b133c290f3f3f5f16e49332e2cd3acb767adfc7bb16887cfff4e751659949095d47e89930f2f1ed53a89b348e8973538be9fa5c
SSDEEP

1536:kdlv/5Bhm7TAfeOhjFVxEslHyH5kuAbzPftb7bLAbZbNumSbeZpy5BgKbAP95b16:yv/5YOhZIslTuNlFPVXqP00KIkOPcs0w

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
amstream.dll

Files

amstream.dll
.dll regsvr32 windows:10 windows x86 arch:x86

590513b8f79a95d59b42f432383613b7

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

amstream.pdb

Imports

msvcrt

_vsnwprintf
memcmp
memcpy
realloc
_except_handler4_common
_initterm
_amsg_exit
_XcptFilter
_callnewh
_purecall
malloc
free
memset

kernel32

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

user32

IsRectEmpty
CharNextW

advapi32

RegCloseKey
RegQueryInfoKeyW
RegDeleteKeyW
RegCreateKeyExW
RegOpenKeyExW
RegDeleteValueW
RegQueryValueExW
RegSetValueExW
RegEnumKeyExW

ole32

CoTaskMemRealloc
CoTaskMemFree
CoCreateInstance
CoTaskMemAlloc

oleaut32

LoadTypeLi
SysFreeString
RegisterTypeLi
VarI4FromStr

ddraw

DirectDrawCreate

Exports

Exports

DllCanUnloadNow
DllGetClassObject
DllRegisterServer
DllUnregisterServer

Sections

.text
Size: 63KB - Virtual size: 62KB

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: 5KB - Virtual size: 4KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

590513b8f79a95d59b42f432383613b7

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

msvcrt

kernel32

user32

advapi32

ole32

oleaut32

ddraw

Exports

Exports

Sections

.text Size: 63KB - Virtual size: 62KB

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

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

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

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

.text
Size: 63KB - Virtual size: 62KB

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

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

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

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