Static task
static1
Behavioral task
behavioral1
Sample
steamclient_loader.exe
Resource
win7-20240319-en
Behavioral task
behavioral2
Sample
steamclient_loader.exe
Resource
win10v2004-20240226-en
General
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Target
steamclient_loader.exe
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Size
206KB
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MD5
284348daf2abb9cc17485a17ab57a5de
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SHA1
d9195a20c34b11062cbfb51385d43d895e16f199
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SHA256
c425cc0e39bc51320e0db536946dffe54c715e2af06a80a39a584d82b8d0cdbc
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SHA512
1081f817233af670ce0c40a9bcbb500b44e7617e598da8c08756ec0d139fa816f3c1ceebb0564eececc90c59410dc969f08d226dfa05288562e1230233f6f117
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SSDEEP
3072:5u1hlvOR3R2gFL4pTGt4/NBOtJwgOeYg4fFcIqeBfmSxsyLZEiq0/OtRXxMlyyaS:rh2Uly/Tg7fSxHLZ9EttvKBMnwv
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource steamclient_loader.exe
Files
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steamclient_loader.exe.exe windows:6 windows x86 arch:x86
5a6e533a847e4a6c14333c31892a86eb
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
Imports
advapi32
RegCreateKeyExW
RegOpenKeyExW
RegQueryValueExW
RegSetValueExA
RegSetValueExW
RegCloseKey
user32
MessageBoxA
kernel32
WriteConsoleW
CreateFileW
SetEnvironmentVariableW
GetFileAttributesW
GetFullPathNameW
CloseHandle
WaitForSingleObject
GetCurrentProcessId
TerminateProcess
ResumeThread
CreateProcessW
GetModuleFileNameW
GetModuleHandleW
lstrcpyW
lstrlenA
lstrlenW
GetPrivateProfileStringW
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetCurrentProcess
IsProcessorFeaturePresent
QueryPerformanceCounter
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
IsDebuggerPresent
GetStartupInfoW
RtlUnwind
GetLastError
SetLastError
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
FreeLibrary
GetProcAddress
LoadLibraryExW
GetStdHandle
WriteFile
ExitProcess
GetModuleHandleExW
HeapFree
HeapAlloc
GetFileType
FindClose
FindFirstFileExW
FindNextFileW
IsValidCodePage
GetACP
GetOEMCP
GetCPInfo
GetCommandLineA
GetCommandLineW
MultiByteToWideChar
WideCharToMultiByte
GetEnvironmentStringsW
FreeEnvironmentStringsW
SetStdHandle
GetStringTypeW
LCMapStringW
GetProcessHeap
SetFilePointerEx
HeapSize
HeapReAlloc
FlushFileBuffers
GetConsoleCP
GetConsoleMode
DecodePointer
RaiseException
Sections
.text Size: 63KB - Virtual size: 63KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 27KB - Virtual size: 26KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 2KB - Virtual size: 4KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.gfids Size: 512B - Virtual size: 176B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 4KB - Virtual size: 3KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
.rsrc Size: 108KB - Virtual size: 107KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ