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Report - j-10

Malicious Library Downloader PE File DLL PE32
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  2. Detailed report
ScreenShot
Created 2023.11.05 12:43 Machine s1_win7_x6403
Filename j-10
Type PE32 executable (DLL) (GUI) Intel 80386, for MS Windows
AI Score
7
 Behavior Score
4.0
ZERO API file : clean
VT API (file)
md5 c9e0712a084fa3eb3742eb3d690217dd
sha256 00c4e5966089d9150bd36b0d55ac45011721d7b8d5b1a2207d3a0935eae1dc51
ssdeep 768:G407txg6CVX762AORxFGPRDEEOsx3n+79Namb3GluLrXCS329a1NzBoFsxHv5rMx:Gd7TGAgFqoQn+mmTCuL7HNzBl55rw3
imphash 070b5b44988eb91ceb5948a1cf23bcef
impfuzzy 24:D4yKuGH8l9ZZtqdPOovSRkFDPJauRvD6FQ8lRT42fnYjM9QIij3w3rznQnAdAOSr:oclZtqdmx2Dgc2fn+Iy3urznBGOSr
  Network IP location

Signature (10cnts)

Level Description
watch Communicates with host for which no DNS query was performed
notice Allocates read-write-execute memory (usually to unpack itself)
notice An executable file was downloaded by the process rundll32.exe
notice Creates executable files on the filesystem
notice Drops an executable to the user AppData folder
notice HTTP traffic contains suspicious features which may be indicative of malware related traffic
notice Performs some HTTP requests
notice Queries the disk size which could be used to detect virtual machine with small fixed size or dynamic allocation
notice Searches running processes potentially to identify processes for sandbox evasion
info Checks if process is being debugged by a debugger

Rules (7cnts)

Level Name Description Collection
watch Malicious_Library_Zero Malicious_Library binaries (upload)
watch Network_Downloader File Downloader binaries (upload)
info IsDLL (no description) binaries (upload)
info IsPE32 (no description) binaries (download)
info IsPE32 (no description) binaries (upload)
info PE_Header_Zero PE File Signature binaries (download)
info PE_Header_Zero PE File Signature binaries (upload)

Network (2cnts) ?

Request CC ASN Co IP4 Rule ? ZERO ?
http://27.124.46.157:8000/1
whois
SG BGPNET Global ASN 27.124.46.157 clean
27.124.46.157
whois
SG BGPNET Global ASN 27.124.46.157 mailcious

Suricata ids

SURICATA HTTP Request abnormal Content-Encoding header
ET MALWARE Likely Evil EXE download from dotted Quad by MSXMLHTTP M1
ET POLICY PE EXE or DLL Windows file download HTTP
ET MALWARE OneLouder EXE download possibly installing Zeus P2P
ET MALWARE Likely Evil EXE download from dotted Quad by MSXMLHTTP M2
ET MALWARE Likely Evil EXE download from MSXMLHTTP non-exe extension M2
ET MALWARE JS/WSF Downloader Dec 08 2016 M6
ET HUNTING SUSPICIOUS Dotted Quad Host MZ Response
ET INFO EXE - Served Attached HTTP

PE API

IAT(Import Address Table) Library

KERNEL32.dll
 0x1000d000 CloseHandle
 0x1000d004 Sleep
 0x1000d008 Process32Next
 0x1000d00c Process32First
 0x1000d010 CreateToolhelp32Snapshot
 0x1000d014 GetLastError
 0x1000d018 GetEnvironmentVariableA
 0x1000d01c CreateMutexA
 0x1000d020 OpenMutexA
 0x1000d024 FlushFileBuffers
 0x1000d028 CreateFileA
 0x1000d02c WriteConsoleW
 0x1000d030 GetConsoleOutputCP
 0x1000d034 WriteConsoleA
 0x1000d038 SetStdHandle
 0x1000d03c InitializeCriticalSectionAndSpinCount
 0x1000d040 LoadLibraryA
 0x1000d044 GetSystemTimeAsFileTime
 0x1000d048 RaiseException
 0x1000d04c TerminateProcess
 0x1000d050 GetCurrentProcess
 0x1000d054 UnhandledExceptionFilter
 0x1000d058 SetUnhandledExceptionFilter
 0x1000d05c IsDebuggerPresent
 0x1000d060 RtlUnwind
 0x1000d064 GetCurrentThreadId
 0x1000d068 GetCommandLineA
 0x1000d06c HeapAlloc
 0x1000d070 HeapFree
 0x1000d074 GetCPInfo
 0x1000d078 InterlockedIncrement
 0x1000d07c InterlockedDecrement
 0x1000d080 GetACP
 0x1000d084 GetOEMCP
 0x1000d088 IsValidCodePage
 0x1000d08c GetModuleHandleW
 0x1000d090 GetProcAddress
 0x1000d094 TlsGetValue
 0x1000d098 TlsAlloc
 0x1000d09c TlsSetValue
 0x1000d0a0 TlsFree
 0x1000d0a4 SetLastError
 0x1000d0a8 ExitProcess
 0x1000d0ac SetHandleCount
 0x1000d0b0 GetStdHandle
 0x1000d0b4 GetFileType
 0x1000d0b8 GetStartupInfoA
 0x1000d0bc DeleteCriticalSection
 0x1000d0c0 GetModuleFileNameA
 0x1000d0c4 FreeEnvironmentStringsA
 0x1000d0c8 GetEnvironmentStrings
 0x1000d0cc FreeEnvironmentStringsW
 0x1000d0d0 WideCharToMultiByte
 0x1000d0d4 GetEnvironmentStringsW
 0x1000d0d8 HeapCreate
 0x1000d0dc HeapDestroy
 0x1000d0e0 VirtualFree
 0x1000d0e4 QueryPerformanceCounter
 0x1000d0e8 GetTickCount
 0x1000d0ec GetCurrentProcessId
 0x1000d0f0 LeaveCriticalSection
 0x1000d0f4 EnterCriticalSection
 0x1000d0f8 VirtualAlloc
 0x1000d0fc HeapReAlloc
 0x1000d100 WriteFile
 0x1000d104 LCMapStringA
 0x1000d108 MultiByteToWideChar
 0x1000d10c LCMapStringW
 0x1000d110 GetStringTypeA
 0x1000d114 GetStringTypeW
 0x1000d118 GetLocaleInfoA
 0x1000d11c HeapSize
 0x1000d120 SetFilePointer
 0x1000d124 GetConsoleCP
 0x1000d128 GetConsoleMode
USER32.dll
 0x1000d138 KillTimer
 0x1000d13c SetTimer
 0x1000d140 GetMessageA
 0x1000d144 MessageBoxA
 0x1000d148 GetDesktopWindow
 0x1000d14c PostQuitMessage
 0x1000d150 TranslateMessage
 0x1000d154 DispatchMessageA
SHELL32.dll
 0x1000d130 ShellExecuteExA
urlmon.dll
 0x1000d15c URLDownloadToFileA

EAT(Export Address Table) Library

0x10002100 Edge

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