Report - csrss.exe

Malicious Library UPX PE File OS Processor Check PE32
ScreenShot
Created 2021.10.20 08:10 Machine s1_win7_x6402
Filename csrss.exe
Type PE32 executable (GUI) Intel 80386, for MS Windows
AI Score
5
Behavior Score
2.6
ZERO API file : clean
VT API (file) 40 detected (AIDetect, malware1, malicious, high confidence, GenericKD, Unsafe, Save, Androm, ZexaF, sy0@aa7b2rcG, Attribute, HighConfidence, Kryptik, HMYZ, R + Troj, Krypt, UMal, ywycz@0, susgen, kcloud, StopCrypt, LokiBot, 4LQ5DU, score, CRYPTINJECT, USMANJJ21, CLASSIC, Static AI, Malicious PE, confidence, 100%)
md5 a6cf11855cd106ea4fcc35c40906331b
sha256 4f28f8460abcaaf087c8f7ac3980916768846e60a096763429bc66bed1e62f57
ssdeep 6144:EF+Fetc/IzSIKu9vM2BMwnggzqX7tNfVXVHQLIiu8cfo0/pW:EFketAI3KevzPzwZGEX8cA0/M
imphash f937f2af706dbcbf43ed87b459c473ae
impfuzzy 24:dWVl6fhJcD5u4NlzL8LOShJKbZtncdYIlyv9P9GT4aajMn5ADLK/:YVa47M68ctncJK9kca55AK/
  Network IP location

Signature (6cnts)

Level Description
danger File has been identified by 40 AntiVirus engines on VirusTotal as malicious
notice Allocates read-write-execute memory (usually to unpack itself)
notice The binary likely contains encrypted or compressed data indicative of a packer
info The executable contains unknown PE section names indicative of a packer (could be a false positive)
info The file contains an unknown PE resource name possibly indicative of a packer
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
 0x41e008 HeapAlloc
 0x41e00c GetCurrentProcess
 0x41e010 GetEnvironmentStringsW
 0x41e014 SetEvent
 0x41e018 FlushViewOfFile
 0x41e01c SleepEx
 0x41e020 ReadConsoleW
 0x41e024 CreateActCtxW
 0x41e028 FreeConsole
 0x41e02c HeapDestroy
 0x41e030 FindNextVolumeW
 0x41e034 WriteConsoleW
 0x41e038 GetModuleFileNameW
 0x41e03c GetOverlappedResult
 0x41e040 GetACP
 0x41e044 ReleaseSemaphore
 0x41e048 DeactivateActCtx
 0x41e04c Module32First
 0x41e050 SetLastError
 0x41e054 GetProcAddress
 0x41e058 BeginUpdateResourceW
 0x41e05c GetAtomNameA
 0x41e060 LocalAlloc
 0x41e064 SetEnvironmentVariableA
 0x41e068 GetModuleHandleA
 0x41e06c GetProcessShutdownParameters
 0x41e070 EraseTape
 0x41e074 VirtualProtect
 0x41e078 GetCPInfoExA
 0x41e07c EndUpdateResourceA
 0x41e080 GetVersionExA
 0x41e084 DeleteAtom
 0x41e088 FindNextVolumeA
 0x41e08c lstrcpyW
 0x41e090 LCMapStringW
 0x41e094 SetProcessAffinityMask
 0x41e098 IsProcessorFeaturePresent
 0x41e09c HeapReAlloc
 0x41e0a0 EncodePointer
 0x41e0a4 DecodePointer
 0x41e0a8 GetModuleHandleW
 0x41e0ac ExitProcess
 0x41e0b0 GetCommandLineW
 0x41e0b4 HeapSetInformation
 0x41e0b8 GetStartupInfoW
 0x41e0bc TlsAlloc
 0x41e0c0 TlsGetValue
 0x41e0c4 TlsSetValue
 0x41e0c8 TlsFree
 0x41e0cc InterlockedIncrement
 0x41e0d0 GetCurrentThreadId
 0x41e0d4 GetLastError
 0x41e0d8 InterlockedDecrement
 0x41e0dc ReadFile
 0x41e0e0 UnhandledExceptionFilter
 0x41e0e4 SetUnhandledExceptionFilter
 0x41e0e8 IsDebuggerPresent
 0x41e0ec TerminateProcess
 0x41e0f0 EnterCriticalSection
 0x41e0f4 LeaveCriticalSection
 0x41e0f8 HeapFree
 0x41e0fc SetHandleCount
 0x41e100 GetStdHandle
 0x41e104 InitializeCriticalSectionAndSpinCount
 0x41e108 GetFileType
 0x41e10c DeleteCriticalSection
 0x41e110 SetFilePointer
 0x41e114 GetCPInfo
 0x41e118 GetOEMCP
 0x41e11c IsValidCodePage
 0x41e120 CloseHandle
 0x41e124 LoadLibraryW
 0x41e128 WriteFile
 0x41e12c FreeEnvironmentStringsW
 0x41e130 HeapCreate
 0x41e134 QueryPerformanceCounter
 0x41e138 GetTickCount
 0x41e13c GetCurrentProcessId
 0x41e140 GetSystemTimeAsFileTime
 0x41e144 Sleep
 0x41e148 MultiByteToWideChar
 0x41e14c WideCharToMultiByte
 0x41e150 RtlUnwind
 0x41e154 SetStdHandle
 0x41e158 GetConsoleCP
 0x41e15c GetConsoleMode
 0x41e160 FlushFileBuffers
 0x41e164 GetStringTypeW
 0x41e168 HeapSize
 0x41e16c RaiseException
 0x41e170 CreateFileW
USER32.dll
 0x41e178 ScreenToClient
GDI32.dll
 0x41e000 GetBitmapBits
WINHTTP.dll
 0x41e180 WinHttpSetOption

EAT(Export Address Table) is none



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