Report - csrss.exe

Malicious Library UPX PE File OS Processor Check PE32
ScreenShot
Created 2021.10.18 18:16 Machine s1_win7_x6401
Filename csrss.exe
Type PE32 executable (GUI) Intel 80386, for MS Windows
AI Score
4
Behavior Score
1.6
ZERO API file : clean
VT API (file) 32 detected (malicious, high confidence, Ulise, Stop, Unsafe, Save, confidence, Kryptik, Eldorado, HMYQ, Androm, BotX, CLASSIC, R + Troj, Krypt, Emotet, Static AI, Suspicious PE, Phonzy, WS9D4D, score, ai score=80, susgen, HMYM)
md5 b1d25fccfa3bac61c224dee5ac4da7c9
sha256 5276828cc9b76bee177d1ff0f6fa4209a00f01a7e8aa70561cc520f0adc4d856
ssdeep 6144:d7EJd7ejdWwwMCZ8WF/Dr8NiqjsohIhOYv1yiG6mCQYDs8Vs7:er7ej8wwMCZ1F/DrsLjsohIhD1LG6fD4
imphash b4cda15a674ef12000829b9be50880b2
impfuzzy 48:lw8Oby1ngbp9OQd3+fcLCEM2tMjASv2AvZo6:lXOuNgt9p3+fcjM2tMjASvJh3
  Network IP location

Signature (3cnts)

Level Description
danger File has been identified by 32 AntiVirus engines on VirusTotal as malicious
notice Allocates read-write-execute memory (usually to unpack itself)
info This executable has a PDB path

Rules (5cnts)

Level Name Description Collection
watch Malicious_Library_Zero Malicious_Library binaries (upload)
watch UPX_Zero UPX packed file binaries (upload)
info IsPE32 (no description) binaries (upload)
info OS_Processor_Check_Zero OS Processor Check binaries (upload)
info PE_Header_Zero PE File Signature binaries (upload)

Network (0cnts) ?

Request CC ASN Co IP4 Rule ? ZERO ?

Suricata ids

PE API

IAT(Import Address Table) Library

KERNEL32.dll
 0x401000 InterlockedDecrement
 0x401004 FindFirstFileExW
 0x401008 OutputDebugStringW
 0x40100c GetModuleHandleW
 0x401010 GetTickCount
 0x401014 IsBadReadPtr
 0x401018 GetConsoleAliasesLengthA
 0x40101c SetFileShortNameW
 0x401020 TerminateThread
 0x401024 GetVersionExW
 0x401028 LocalHandle
 0x40102c GetModuleFileNameW
 0x401030 GetEnvironmentVariableA
 0x401034 ExitThread
 0x401038 lstrlenW
 0x40103c GetStartupInfoW
 0x401040 GetConsoleOutputCP
 0x401044 SetCurrentDirectoryA
 0x401048 GetCurrentDirectoryW
 0x40104c SetLastError
 0x401050 GetProcAddress
 0x401054 GetLongPathNameA
 0x401058 MoveFileW
 0x40105c WriteProfileSectionA
 0x401060 CopyFileA
 0x401064 GlobalGetAtomNameA
 0x401068 SearchPathA
 0x40106c _hwrite
 0x401070 OpenWaitableTimerA
 0x401074 LoadLibraryA
 0x401078 ProcessIdToSessionId
 0x40107c OpenWaitableTimerW
 0x401080 LocalAlloc
 0x401084 WriteProfileSectionW
 0x401088 GetOEMCP
 0x40108c GetProcessShutdownParameters
 0x401090 FreeEnvironmentStringsW
 0x401094 CompareStringA
 0x401098 GetFileTime
 0x40109c GetWindowsDirectoryW
 0x4010a0 DeleteTimerQueueTimer
 0x4010a4 DeleteFileW
 0x4010a8 AddConsoleAliasA
 0x4010ac CloseHandle
 0x4010b0 CreateFileW
 0x4010b4 WideCharToMultiByte
 0x4010b8 InterlockedIncrement
 0x4010bc MultiByteToWideChar
 0x4010c0 InterlockedExchange
 0x4010c4 EncodePointer
 0x4010c8 DecodePointer
 0x4010cc InitializeCriticalSection
 0x4010d0 DeleteCriticalSection
 0x4010d4 EnterCriticalSection
 0x4010d8 LeaveCriticalSection
 0x4010dc HeapValidate
 0x4010e0 GetCommandLineW
 0x4010e4 HeapSetInformation
 0x4010e8 GetCPInfo
 0x4010ec RtlUnwind
 0x4010f0 RaiseException
 0x4010f4 LCMapStringW
 0x4010f8 TerminateProcess
 0x4010fc GetCurrentProcess
 0x401100 UnhandledExceptionFilter
 0x401104 SetUnhandledExceptionFilter
 0x401108 IsDebuggerPresent
 0x40110c IsProcessorFeaturePresent
 0x401110 InitializeCriticalSectionAndSpinCount
 0x401114 HeapAlloc
 0x401118 GetModuleFileNameA
 0x40111c GetLastError
 0x401120 HeapReAlloc
 0x401124 HeapSize
 0x401128 HeapQueryInformation
 0x40112c HeapFree
 0x401130 HeapCreate
 0x401134 GetACP
 0x401138 IsValidCodePage
 0x40113c TlsAlloc
 0x401140 TlsGetValue
 0x401144 TlsSetValue
 0x401148 GetCurrentThreadId
 0x40114c TlsFree
 0x401150 QueryPerformanceCounter
 0x401154 GetCurrentProcessId
 0x401158 GetSystemTimeAsFileTime
 0x40115c ExitProcess
 0x401160 GetEnvironmentStringsW
 0x401164 SetHandleCount
 0x401168 GetStdHandle
 0x40116c GetFileType
 0x401170 WriteFile
 0x401174 GetStringTypeW
 0x401178 GetLocaleInfoW
 0x40117c OutputDebugStringA
 0x401180 WriteConsoleW
 0x401184 LoadLibraryW
 0x401188 GetLocaleInfoA
 0x40118c IsValidLocale
 0x401190 EnumSystemLocalesA
 0x401194 GetUserDefaultLCID
 0x401198 SetFilePointer
 0x40119c GetConsoleCP
 0x4011a0 GetConsoleMode
 0x4011a4 SetStdHandle
 0x4011a8 FlushFileBuffers
USER32.dll
 0x4011b0 GetAltTabInfoW

EAT(Export Address Table) is none



Similarity measure (PE file only) - Checking for service failure