Static task
static1
Behavioral task
behavioral1
Sample
DeleteSteamAppCache.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
DeleteSteamAppCache.exe
Resource
win10v2004-20240709-en
Behavioral task
behavioral3
Sample
user32.dll
Resource
win7-20240708-en
Behavioral task
behavioral4
Sample
user32.dll
Resource
win10v2004-20240709-en
Behavioral task
behavioral5
Sample
user32SteamFamilies.dll
Resource
win7-20240708-en
Behavioral task
behavioral6
Sample
user32SteamFamilies.dll
Resource
win10v2004-20240709-en
General
-
Target
StealthMode.zip
-
Size
370KB
-
MD5
3fd2c101c77d76d41919b8bce6b6223d
-
SHA1
d8b9bf04a6cbcf2d67fe63fa8cd996963a75a987
-
SHA256
31160c3e0c22b414d276b957660d0ea036c2d495508380d37ec9c25f93b8626b
-
SHA512
8988a987a328709f82bb2c40911f6b4435c1a7b741558e3ad23d1f1fcaa1e9eaa7f64f8bb496757806f83e5767c553212760813d5b8ada04cf38ad6f712b8edb
-
SSDEEP
6144:4MYiXALymrsRKFCHK9MRn5XqQ+bRtAVb6rDYzq+8vePrhfG3VF2j/tH+:VYrPBFV9wn5t+lprBveDheUte
Malware Config
Signatures
-
Unsigned PE 3 IoCs
Checks for missing Authenticode signature.
resource unpack001/DeleteSteamAppCache.exe unpack001/user32.dll unpack001/user32SteamFamilies.dll
Files
-
StealthMode.zip.zip
-
DeleteSteamAppCache.exe.exe windows:6 windows x64 arch:x64
69d2125e999d93aa4c27689335bcaee2
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
Imports
kernel32
CreateFileW
CloseHandle
WriteConsoleW
DeleteFileW
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetCurrentProcess
TerminateProcess
IsProcessorFeaturePresent
QueryPerformanceCounter
GetCurrentProcessId
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
IsDebuggerPresent
GetStartupInfoW
GetModuleHandleW
RtlUnwindEx
GetLastError
SetLastError
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
FreeLibrary
GetProcAddress
LoadLibraryExW
EncodePointer
RaiseException
RtlPcToFileHeader
GetStdHandle
WriteFile
GetModuleFileNameW
ExitProcess
GetModuleHandleExW
HeapAlloc
HeapFree
FindClose
FindFirstFileExW
FindNextFileW
IsValidCodePage
GetACP
GetOEMCP
GetCPInfo
GetCommandLineA
GetCommandLineW
MultiByteToWideChar
WideCharToMultiByte
GetEnvironmentStringsW
FreeEnvironmentStringsW
SetStdHandle
GetFileType
GetStringTypeW
FlsAlloc
FlsGetValue
FlsSetValue
FlsFree
LCMapStringW
GetProcessHeap
HeapSize
HeapReAlloc
FlushFileBuffers
GetConsoleOutputCP
GetConsoleMode
SetFilePointerEx
user32
MessageBoxW
advapi32
RegGetValueW
Sections
.text Size: 56KB - Virtual size: 55KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 38KB - Virtual size: 38KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 3KB - Virtual size: 7KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 4KB - Virtual size: 3KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 512B - Virtual size: 480B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 2KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
-
user32.dll.dll windows:6 windows x86 arch:x86
a01ef89cd0f61d3df1059e1dcfa68add
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL
Imports
kernel32
VirtualFree
VirtualAlloc
VirtualQuery
CreateDirectoryW
GetStartupInfoW
ReadFile
GetFileSizeEx
WriteProcessMemory
HeapFree
SetLastError
EnterCriticalSection
GetHandleInformation
GetCurrentProcess
WriteFile
GetModuleHandleExW
GetPrivateProfileIntW
GetModuleFileNameW
GetProcessId
LeaveCriticalSection
GetEnvironmentVariableW
InitializeCriticalSectionEx
GetEnvironmentVariableA
WaitForSingleObject
CreateFileW
FreeLibraryAndExitThread
HeapSize
CreateEventW
Sleep
GetLastError
K32GetModuleBaseNameW
SetEvent
DeleteFileW
HeapReAlloc
CloseHandle
GetNativeSystemInfo
FreeConsole
CreateThread
HeapAlloc
GetLocalTime
VirtualProtectEx
DecodePointer
HeapDestroy
GetProcAddress
VirtualAllocEx
DeleteCriticalSection
ExitProcess
GetCurrentProcessId
GetProcessHeap
GetModuleHandleW
FlushInstructionCache
CreateRemoteThread
VirtualFreeEx
AllocConsole
IsWow64Process
LoadLibraryExW
VirtualQueryEx
HeapCreate
VirtualProtect
Thread32Next
Thread32First
GetCurrentThreadId
SuspendThread
ResumeThread
CreateToolhelp32Snapshot
GetThreadContext
SetThreadContext
OpenThread
SetEndOfFile
RaiseException
GetSystemInfo
FreeLibrary
LoadLibraryExA
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TerminateProcess
IsProcessorFeaturePresent
IsDebuggerPresent
QueryPerformanceCounter
GetSystemTimeAsFileTime
InitializeSListHead
OutputDebugStringW
RtlUnwind
InterlockedFlushSList
EncodePointer
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
SetFilePointerEx
GetConsoleMode
ReadConsoleW
GetStdHandle
GetFileType
CompareStringW
LCMapStringW
GetTimeZoneInformation
FindClose
FindFirstFileExW
FindNextFileW
IsValidCodePage
GetACP
GetOEMCP
GetCPInfo
GetCommandLineA
GetCommandLineW
MultiByteToWideChar
WideCharToMultiByte
GetEnvironmentStringsW
FreeEnvironmentStringsW
SetEnvironmentVariableW
SetStdHandle
GetStringTypeW
FlushFileBuffers
GetConsoleOutputCP
WriteConsoleW
Sections
.text Size: 299KB - Virtual size: 298KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 93KB - Virtual size: 93KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 9KB - Virtual size: 65KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 512B - Virtual size: 248B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 22KB - Virtual size: 21KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
-
user32SteamFamilies.dll.dll windows:6 windows x86 arch:x86
a01ef89cd0f61d3df1059e1dcfa68add
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL
Imports
kernel32
VirtualFree
VirtualAlloc
VirtualQuery
CreateDirectoryW
GetStartupInfoW
ReadFile
GetFileSizeEx
WriteProcessMemory
HeapFree
SetLastError
EnterCriticalSection
GetHandleInformation
GetCurrentProcess
WriteFile
GetModuleHandleExW
GetPrivateProfileIntW
GetModuleFileNameW
GetProcessId
LeaveCriticalSection
GetEnvironmentVariableW
InitializeCriticalSectionEx
GetEnvironmentVariableA
WaitForSingleObject
CreateFileW
FreeLibraryAndExitThread
HeapSize
CreateEventW
Sleep
GetLastError
K32GetModuleBaseNameW
SetEvent
DeleteFileW
HeapReAlloc
CloseHandle
GetNativeSystemInfo
FreeConsole
CreateThread
HeapAlloc
GetLocalTime
VirtualProtectEx
DecodePointer
HeapDestroy
GetProcAddress
VirtualAllocEx
DeleteCriticalSection
ExitProcess
GetCurrentProcessId
GetProcessHeap
GetModuleHandleW
FlushInstructionCache
CreateRemoteThread
VirtualFreeEx
AllocConsole
IsWow64Process
LoadLibraryExW
VirtualQueryEx
HeapCreate
VirtualProtect
Thread32Next
Thread32First
GetCurrentThreadId
SuspendThread
ResumeThread
CreateToolhelp32Snapshot
GetThreadContext
SetThreadContext
OpenThread
SetEndOfFile
RaiseException
GetSystemInfo
FreeLibrary
LoadLibraryExA
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TerminateProcess
IsProcessorFeaturePresent
IsDebuggerPresent
QueryPerformanceCounter
GetSystemTimeAsFileTime
InitializeSListHead
OutputDebugStringW
RtlUnwind
InterlockedFlushSList
EncodePointer
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
SetFilePointerEx
GetConsoleMode
ReadConsoleW
GetStdHandle
GetFileType
CompareStringW
LCMapStringW
GetTimeZoneInformation
FindClose
FindFirstFileExW
FindNextFileW
IsValidCodePage
GetACP
GetOEMCP
GetCPInfo
GetCommandLineA
GetCommandLineW
MultiByteToWideChar
WideCharToMultiByte
GetEnvironmentStringsW
FreeEnvironmentStringsW
SetEnvironmentVariableW
SetStdHandle
GetStringTypeW
FlushFileBuffers
GetConsoleOutputCP
WriteConsoleW
Sections
.text Size: 299KB - Virtual size: 299KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 93KB - Virtual size: 93KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 9KB - Virtual size: 65KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 512B - Virtual size: 248B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 22KB - Virtual size: 21KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ