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Report - iviewers.dll

Generic Malware Downloader Malicious Library UPX Antivirus Create Service Socket DGA Http API ScreenShot Escalate priviledges Steal credential PWS Sniff Audio HTTP DNS Code injection Internet API FTP KeyLogger P2P AntiDebug AntiVM PE File DLL DllRegisterS
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ScreenShot
Created 2025.01.23 06:36 Machine s1_win7_x6403
Filename iviewers.dll
Type PE32 executable (DLL) (console) Intel 80386, for MS Windows
AI Score
3
 Behavior Score
9.2
ZERO API file : malware
VT API (file)
md5 07fd51e1e8368144ea403137a671b84c
sha256 b260f38480746bb3769dbbc23802b3207b093e552d61b3e787386b94b081e31f
ssdeep 1536:Y2ShYtT4To+GdOfoPXRr9tXLtAuQeSVdJssWdcd7IW3+ZR+ueK:Y2z0To+GdlhrbwJJ7IW3+n+ue
imphash 7ceca204ebc32aa6a49c38b8ef6a9854
impfuzzy 24:DtMS1ihlJnc+pl3eDo/CYodUgOovbO9ZsvwGM8:DtMS1i5c+ppmYp36/
  Network IP location

Signature (24cnts)

Level Description
watch An executable file was downloaded by the process powershell.exe
watch Communicates with host for which no DNS query was performed
watch Network communications indicative of a potential document or script payload download was initiated by the process powershell.exe
watch Resumed a suspended thread in a remote process potentially indicative of process injection
notice A process created a hidden window
notice Allocates read-write-execute memory (usually to unpack itself)
notice Checks adapter addresses which can be used to detect virtual network interfaces
notice Checks for the Locally Unique Identifier on the system for a suspicious privilege
notice Creates a shortcut to an executable file
notice Creates a suspicious process
notice Creates executable files on the filesystem
notice HTTP traffic contains suspicious features which may be indicative of malware related traffic
notice One or more potentially interesting buffers were extracted
notice Performs some HTTP requests
notice Poweshell is sending data to a remote host
notice URL downloaded by powershell script
notice Uses Windows utilities for basic Windows functionality
notice Yara rule detected in process memory
info Checks amount of memory in system
info Checks if process is being debugged by a debugger
info Command line console output was observed
info Queries for the computername
info This executable has a PDB path
info Uses Windows APIs to generate a cryptographic key

Rules (43cnts)

Level Name Description Collection
warning Generic_Malware_Zero Generic Malware binaries (download)
warning Generic_Malware_Zero Generic Malware binaries (upload)
watch Antivirus Contains references to security software binaries (download)
watch Malicious_Library_Zero Malicious_Library binaries (upload)
watch Network_Downloader File Downloader memory
watch UPX_Zero UPX packed file binaries (upload)
notice Code_injection Code injection with CreateRemoteThread in a remote process memory
notice Create_Service Create a windows service memory
notice Escalate_priviledges Escalate priviledges memory
notice Generic_PWS_Memory_Zero PWS Memory memory
notice KeyLogger Run a KeyLogger memory
notice local_credential_Steal Steal credential memory
notice Network_DGA Communication using DGA memory
notice Network_DNS Communications use DNS memory
notice Network_FTP Communications over FTP memory
notice Network_HTTP Communications over HTTP memory
notice Network_P2P_Win Communications over P2P network memory
notice Network_TCP_Socket Communications over RAW Socket memory
notice ScreenShot Take ScreenShot memory
notice Sniff_Audio Record Audio memory
notice Str_Win32_Http_API Match Windows Http API call memory
notice Str_Win32_Internet_API Match Windows Inet API call memory
info anti_dbg Checks if being debugged memory
info antisb_threatExpert Anti-Sandbox checks for ThreatExpert memory
info Check_Dlls (no description) memory
info DebuggerCheck__GlobalFlags (no description) memory
info DebuggerCheck__QueryInfo (no description) memory
info DebuggerCheck__RemoteAPI (no description) memory
info DebuggerException__ConsoleCtrl (no description) memory
info DebuggerException__SetConsoleCtrl (no description) memory
info DebuggerHiding__Active (no description) memory
info DebuggerHiding__Thread (no description) memory
info disable_dep Bypass DEP memory
info DllRegisterServer_Zero execute regsvr32.exe binaries (upload)
info IsDLL (no description) 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)
info PowerShell PowerShell script scripts
info SEH__vectored (no description) memory
info ThreadControl__Context (no description) memory
info win_hook Affect hook table memory
info PowershellDI Extract Download/Invoke calls from powershell script scripts

Network (3cnts) ?

Request CC ASN Co IP4 Rule ? ZERO ?
http://147.45.44.131/infopage/ioubcs.exe
whois
RU OOO FREEnet Group 147.45.44.131 clean
http://147.45.44.131/infopage/vsgqwn1qxS.bat
whois
RU OOO FREEnet Group 147.45.44.131 clean
147.45.44.131
whois
RU OOO FREEnet Group 147.45.44.131 malware

Suricata ids

PE API

IAT(Import Address Table) Library

SHELL32.dll
 0x1000d108 ShellExecuteA
KERNEL32.dll
 0x1000d000 IsValidCodePage
 0x1000d004 DecodePointer
 0x1000d008 UnhandledExceptionFilter
 0x1000d00c SetUnhandledExceptionFilter
 0x1000d010 GetCurrentProcess
 0x1000d014 TerminateProcess
 0x1000d018 IsProcessorFeaturePresent
 0x1000d01c QueryPerformanceCounter
 0x1000d020 GetCurrentProcessId
 0x1000d024 GetCurrentThreadId
 0x1000d028 GetSystemTimeAsFileTime
 0x1000d02c InitializeSListHead
 0x1000d030 IsDebuggerPresent
 0x1000d034 GetStartupInfoW
 0x1000d038 GetModuleHandleW
 0x1000d03c InterlockedFlushSList
 0x1000d040 RtlUnwind
 0x1000d044 GetLastError
 0x1000d048 SetLastError
 0x1000d04c EnterCriticalSection
 0x1000d050 LeaveCriticalSection
 0x1000d054 DeleteCriticalSection
 0x1000d058 InitializeCriticalSectionAndSpinCount
 0x1000d05c TlsAlloc
 0x1000d060 TlsGetValue
 0x1000d064 TlsSetValue
 0x1000d068 TlsFree
 0x1000d06c FreeLibrary
 0x1000d070 GetProcAddress
 0x1000d074 LoadLibraryExW
 0x1000d078 EncodePointer
 0x1000d07c RaiseException
 0x1000d080 ExitProcess
 0x1000d084 GetModuleHandleExW
 0x1000d088 GetModuleFileNameW
 0x1000d08c HeapAlloc
 0x1000d090 HeapFree
 0x1000d094 FindClose
 0x1000d098 FindFirstFileExW
 0x1000d09c FindNextFileW
 0x1000d0a0 CloseHandle
 0x1000d0a4 GetACP
 0x1000d0a8 GetOEMCP
 0x1000d0ac GetCPInfo
 0x1000d0b0 GetCommandLineA
 0x1000d0b4 GetCommandLineW
 0x1000d0b8 MultiByteToWideChar
 0x1000d0bc WideCharToMultiByte
 0x1000d0c0 GetEnvironmentStringsW
 0x1000d0c4 FreeEnvironmentStringsW
 0x1000d0c8 LCMapStringW
 0x1000d0cc GetProcessHeap
 0x1000d0d0 GetStdHandle
 0x1000d0d4 GetFileType
 0x1000d0d8 GetStringTypeW
 0x1000d0dc HeapSize
 0x1000d0e0 HeapReAlloc
 0x1000d0e4 SetStdHandle
 0x1000d0e8 FlushFileBuffers
 0x1000d0ec WriteFile
 0x1000d0f0 GetConsoleOutputCP
 0x1000d0f4 GetConsoleMode
 0x1000d0f8 SetFilePointerEx
 0x1000d0fc CreateFileW
 0x1000d100 WriteConsoleW

EAT(Export Address Table) Library

0x10001000 DllRegisterServer

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