Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral3
Sample
Server.exe
Resource
win7-20240221-en
Behavioral task
behavioral4
Sample
Server.exe
Resource
win10v2004-20240226-en
General
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Target
urok-23.7z
-
Size
151KB
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MD5
88422b0dabfd7cf1eab40a493af8e013
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SHA1
5273adec493715b8b8a8e8113c5ad174d86b059e
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SHA256
a4fcf96be14346d61aebe77fb59517a0bc94d26b2d2dacc133de275d8b848c3a
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SHA512
fed4dec3804a6af3ae5cc65a9b7067542fb3c962942c2b6ad3227369bfbf81300558c9d4866e8f464c1df42bce1932c5cc85c62aa4c102f2c91db9e251f5a46a
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SSDEEP
3072:+4zd+OYfmE0ixRsoNwoJBbwghUDvIn/RBZ3BKp1/q9YrU/03hK1oMO+EXcK:+ggOABHxRTxhR/rup1/ihCKBK
Malware Config
Extracted
njrat
im523
POS4
1402490874af6916a7bfdac6310f1cc9
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reg_key
1402490874af6916a7bfdac6310f1cc9
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splitter
|'|'|
Signatures
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Njrat family
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Unsigned PE 2 IoCs
Checks for missing Authenticode signature.
resource unpack002/file unpack004/Server.bin
Files
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urok-23.7z.7z .zip polyglot
Password: 123
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sample1.zip.zip
Password: infected
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file.exe windows:5 windows x86 arch:x86
Password: 123
b4c9459984428e82188c5cc6c1f86aba
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
Imports
kernel32
CreateMutexW
WriteConsoleInputW
AllocConsole
lstrcpynA
HeapAlloc
InterlockedIncrement
OpenJobObjectA
InterlockedDecrement
GetNamedPipeHandleStateA
GetUserDefaultLCID
FreeEnvironmentStringsA
GetModuleHandleW
GetTickCount
GetCurrentThread
GetConsoleAliasesLengthA
GetWindowsDirectoryA
GetConsoleAliasExesW
WaitNamedPipeW
GetCommandLineA
GetPriorityClass
GetVolumePathNameW
GetPrivateProfileIntA
SetFileShortNameW
_hread
GetCalendarInfoW
CreateEventA
GetConsoleAliasExesLengthW
LeaveCriticalSection
GetFileAttributesA
CreateSemaphoreA
WriteConsoleW
GetCompressedFileSizeA
QueryInformationJobObject
CompareStringW
lstrlenW
FindNextVolumeMountPointW
GetTempFileNameW
CreateMailslotW
DeleteFiber
GetCPInfoExW
GetLastError
GetProcAddress
HeapSize
RemoveDirectoryA
SearchPathA
SetFileAttributesA
OpenWaitableTimerA
LoadLibraryA
LocalAlloc
MoveFileA
GetNumberFormatW
AddAtomW
BeginUpdateResourceA
OpenJobObjectW
FindAtomA
GetPrivateProfileSectionNamesA
GetModuleHandleA
OpenFileMappingW
FindNextFileW
GetStringTypeW
GetCurrentDirectoryA
EnumDateFormatsW
GetShortPathNameW
GetCPInfoExA
SetCalendarInfoA
GetVersionExA
GetFileInformationByHandle
DebugBreak
ReadConsoleOutputCharacterW
lstrcpyW
DeleteFileA
LocalFileTimeToFileTime
SetThreadPriority
GetVolumeNameForVolumeMountPointA
Sleep
InitializeCriticalSection
DeleteCriticalSection
EnterCriticalSection
EncodePointer
DecodePointer
WideCharToMultiByte
HeapSetInformation
GetStartupInfoW
HeapFree
RtlUnwind
GetCPInfo
GetACP
GetOEMCP
IsValidCodePage
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
SetLastError
GetCurrentThreadId
UnhandledExceptionFilter
SetUnhandledExceptionFilter
IsDebuggerPresent
TerminateProcess
GetCurrentProcess
SetFilePointer
CloseHandle
RaiseException
ExitProcess
WriteFile
GetStdHandle
GetModuleFileNameW
GetModuleFileNameA
FreeEnvironmentStringsW
GetEnvironmentStringsW
SetHandleCount
InitializeCriticalSectionAndSpinCount
GetFileType
HeapCreate
QueryPerformanceCounter
GetCurrentProcessId
GetSystemTimeAsFileTime
MultiByteToWideChar
IsProcessorFeaturePresent
LCMapStringW
SetStdHandle
GetConsoleCP
GetConsoleMode
FlushFileBuffers
LoadLibraryW
HeapReAlloc
ReadFile
CreateFileW
advapi32
ReadEventLogA
Sections
.text Size: 117KB - Virtual size: 116KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.data Size: 78KB - Virtual size: 23.1MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.taha Size: 1024B - Virtual size: 580B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 62KB - Virtual size: 61KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
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sample2.zip.zip
Password: infected
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Server.bin.exe windows:4 windows x86 arch:x86
Password: 123
f34d5f2d4577ed6d9ceec516c1f5a744
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
Imports
mscoree
_CorExeMain
Sections
.text Size: 35KB - Virtual size: 34KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 1024B - Virtual size: 575B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ