Static task
static1
Behavioral task
behavioral1
Sample
R3nzSkin/R3nzSkin.dll
Resource
win11-20240221-en
Behavioral task
behavioral2
Sample
R3nzSkin/pZxBhFcO.exe
Resource
win11-20240221-en
General
-
Target
R3nzSkin.zip
-
Size
533KB
-
MD5
034e0731f8dd8223769010056bf5dccd
-
SHA1
a992f1a27324201513a7b4d5ab8e83580c3f35d8
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SHA256
facee10622a269849046140dc026a333d1b23763e7e29f36e23838befb4f4f70
-
SHA512
c880f2d8267ebe3ea6429eb217cdc774706f47ae125c5f8236001483c0886a77dfe3fa3e6a510ae28c88fa8b524a9b6ef280f941a3787558aad836fbb5e63d2b
-
SSDEEP
12288:9WI2ZYRmpsvFh84C59M8hkoC3TnerxzO5+wW7KXf:P2ZYRo2FhM5phkoKerxzO5Mo
Malware Config
Signatures
-
Unsigned PE 2 IoCs
Checks for missing Authenticode signature.
resource unpack001/R3nzSkin/R3nzSkin.dll unpack001/R3nzSkin/pZxBhFcO.exe
Files
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R3nzSkin.zip.zip
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R3nzSkin/R3nzSkin.dll.dll windows:6 windows x64 arch:x64
1d3ae125c9fa70b475946ee6ae658c12
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DLL
Imports
kernel32
QueryPerformanceCounter
GetModuleHandleW
VirtualQuery
DisableThreadLibraryCalls
GetCurrentThread
CloseHandle
ExitProcess
SetEndOfFile
WriteConsoleW
HeapSize
SetStdHandle
GetProcessHeap
FreeEnvironmentStringsW
GetEnvironmentStringsW
GetCommandLineW
GetCommandLineA
GetOEMCP
GetProcAddress
IsValidCodePage
HeapReAlloc
ReadConsoleW
EnumSystemLocalesW
GetUserDefaultLCID
IsValidLocale
GetLocaleInfoW
LCMapStringW
FlsFree
FlsSetValue
FlsGetValue
QueryPerformanceFrequency
GlobalUnlock
FlsAlloc
HeapAlloc
HeapFree
GetConsoleMode
WideCharToMultiByte
GlobalLock
GlobalAlloc
GlobalFree
GetACP
MultiByteToWideChar
GetConsoleOutputCP
WriteFile
FlushFileBuffers
GetFileType
LocalFree
FormatMessageA
GetLocaleInfoEx
CreateDirectoryW
CreateFileW
FindClose
FindFirstFileW
FindFirstFileExW
FindNextFileW
GetFileAttributesExW
AreFileApisANSI
GetLastError
GetFileInformationByHandleEx
ReleaseSRWLockExclusive
AcquireSRWLockExclusive
TryAcquireSRWLockExclusive
GetCurrentThreadId
Sleep
InitOnceComplete
InitOnceBeginInitialize
EnterCriticalSection
LeaveCriticalSection
InitializeCriticalSectionEx
DeleteCriticalSection
EncodePointer
DecodePointer
LCMapStringEx
GetSystemTimeAsFileTime
WakeAllConditionVariable
SleepConditionVariableSRW
GetStringTypeW
GetCPInfo
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
IsDebuggerPresent
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetStartupInfoW
IsProcessorFeaturePresent
GetCurrentProcessId
InitializeSListHead
GetCurrentProcess
TerminateProcess
RtlUnwindEx
RtlPcToFileHeader
RaiseException
InterlockedFlushSList
SetLastError
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
FreeLibrary
LoadLibraryExW
ReadFile
CreateThread
ExitThread
FreeLibraryAndExitThread
GetModuleHandleExW
GetModuleFileNameW
GetFileSizeEx
SetFilePointerEx
GetStdHandle
RtlUnwind
user32
CloseClipboard
EmptyClipboard
GetClipboardData
SetClipboardData
OpenClipboard
CallWindowProcW
SetWindowLongPtrW
GetAsyncKeyState
SetWindowLongW
MessageBoxA
ScreenToClient
GetCapture
ClientToScreen
IsChild
TrackMouseEvent
GetForegroundWindow
LoadCursorW
SetCapture
SetCursor
GetClientRect
ReleaseCapture
SetCursorPos
GetCursorPos
shell32
SHGetKnownFolderPath
ole32
CoTaskMemFree
imm32
ImmSetCompositionWindow
ImmReleaseContext
ImmGetContext
d3dcompiler_47
D3DCompile
Sections
.text Size: 563KB - Virtual size: 563KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 144KB - Virtual size: 143KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 5KB - Virtual size: 17KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 25KB - Virtual size: 24KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
_RDATA Size: 512B - Virtual size: 500B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 1024B - Virtual size: 856B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 3KB - Virtual size: 2KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
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R3nzSkin/pZxBhFcO.exe.exe windows:6 windows x64 arch:x64
2024c777d3a5520875560d33b67cf40b
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
Imports
msvcp140
?gptr@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEBAPEADXZ
?out@?$codecvt@DDU_Mbstatet@@@std@@QEBAHAEAU_Mbstatet@@PEBD1AEAPEBDPEAD3AEAPEAD@Z
?_Pninc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAAPEADXZ
?epptr@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEBAPEADXZ
?pptr@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEBAPEADXZ
??1_Locinfo@std@@QEAA@XZ
??0_Locinfo@std@@QEAA@PEBD@Z
?c_str@?$_Yarn@D@std@@QEBAPEBDXZ
?tolower@?$ctype@D@std@@QEBAPEBDPEADPEBD@Z
?setstate@?$basic_ios@DU?$char_traits@D@std@@@std@@QEAAXH_N@Z
??0?$basic_istream@DU?$char_traits@D@std@@@std@@QEAA@PEAV?$basic_streambuf@DU?$char_traits@D@std@@@1@_N@Z
??0?$basic_ios@DU?$char_traits@D@std@@@std@@IEAA@XZ
_Thrd_sleep
?getloc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEBA?AVlocale@2@XZ
?_Fiopen@std@@YAPEAU_iobuf@@PEB_WHH@Z
_Xtime_get_ticks
?_Gndec@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAAPEADXZ
??1_Lockit@std@@QEAA@XZ
?_Getcat@?$ctype@D@std@@SA_KPEAPEBVfacet@locale@2@PEBV42@@Z
?_Gninc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAAPEADXZ
?in@?$codecvt@DDU_Mbstatet@@@std@@QEBAHAEAU_Mbstatet@@PEBD1AEAPEBDPEAD3AEAPEAD@Z
?xsgetn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAA_JPEAD_J@Z
?_Gnavail@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEBA_JXZ
?gbump@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAAXH@Z
?xsputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAA_JPEBD_J@Z
?_Pnavail@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEBA_JXZ
?pbump@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAAXH@Z
_Strcoll
_Strxfrm
?_Throw_Cpp_error@std@@YAXH@Z
_Thrd_detach
_Cnd_do_broadcast_at_thread_exit
?_Getcat@?$codecvt@DDU_Mbstatet@@@std@@SA_KPEAPEBVfacet@locale@2@PEBV42@@Z
??Bid@locale@std@@QEAA_KXZ
??0_Lockit@std@@QEAA@H@Z
??1?$basic_ios@DU?$char_traits@D@std@@@std@@UEAA@XZ
??1?$basic_istream@DU?$char_traits@D@std@@@std@@UEAA@XZ
?tolower@?$ctype@D@std@@QEBADD@Z
?is@?$ctype@D@std@@QEBA_NFD@Z
??1facet@locale@std@@MEAA@XZ
??0facet@locale@std@@IEAA@_K@Z
?unshift@?$codecvt@DDU_Mbstatet@@@std@@QEBAHAEAU_Mbstatet@@PEAD1AEAPEAD@Z
?always_noconv@codecvt_base@std@@QEBA_NXZ
_Query_perf_counter
_Query_perf_frequency
?_Xregex_error@std@@YAXW4error_type@regex_constants@1@@Z
?_Getcoll@_Locinfo@std@@QEBA?AU_Collvec@@XZ
??1?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAA@XZ
??0?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAA@XZ
?_Init@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAAXPEAPEAD0PEAH001@Z
?_Init@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAAXXZ
?setg@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAAXPEAD00@Z
?eback@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEBAPEADXZ
?_Xbad_alloc@std@@YAXXZ
?_Getgloballocale@locale@std@@CAPEAV_Locimp@12@XZ
?_Init@locale@std@@CAPEAV_Locimp@12@_N@Z
?_Xlength_error@std@@YAXPEBD@Z
?id@?$collate@D@std@@2V0locale@2@A
?id@?$codecvt@DDU_Mbstatet@@@std@@2V0locale@2@A
?id@?$ctype@D@std@@2V0locale@2@A
?_Decref@facet@locale@std@@UEAAPEAV_Facet_base@3@XZ
?showmanyc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAA_JXZ
?_Incref@facet@locale@std@@UEAAXXZ
?egptr@?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEBAPEADXZ
api-ms-win-crt-runtime-l1-1-0
terminate
abort
_cexit
_beginthreadex
_invalid_parameter_noinfo_noreturn
api-ms-win-crt-stdio-l1-1-0
_get_stream_buffer_pointers
fwrite
fputc
ungetc
fgetc
_fseeki64
fgetpos
fsetpos
setvbuf
fread
fclose
fflush
api-ms-win-crt-utility-l1-1-0
srand
api-ms-win-crt-heap-l1-1-0
malloc
realloc
free
_callnewh
kernel32
Sleep
GetSystemTimeAsFileTime
GetCurrentThreadId
GetCurrentProcessId
QueryPerformanceCounter
IsProcessorFeaturePresent
TerminateProcess
GetCurrentProcess
SetUnhandledExceptionFilter
UnhandledExceptionFilter
RtlVirtualUnwind
RtlLookupFunctionEntry
RtlCaptureContext
WideCharToMultiByte
vcruntime140
memcpy
__std_exception_destroy
__std_exception_copy
__CxxQueryExceptionSize
__CxxExceptionFilter
__CxxRegisterExceptionObject
__CxxDetectRethrow
__CxxUnregisterExceptionObject
memmove
__FrameUnwindFilter
__current_exception
__current_exception_context
_CxxThrowException
strchr
advapi32
LookupPrivilegeValueW
AdjustTokenPrivileges
OpenProcessToken
api-ms-win-crt-filesystem-l1-1-0
_unlock_file
_lock_file
api-ms-win-crt-time-l1-1-0
_time64
mscoree
_CorExeMain
Sections
.text Size: 91KB - Virtual size: 91KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.nep Size: 1024B - Virtual size: 656B
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 193KB - Virtual size: 192KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 3KB - Virtual size: 8KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 512B - Virtual size: 168B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 23KB - Virtual size: 23KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 1024B - Virtual size: 680B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ