umbral | LegacyPhasmo[.]rar

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General

Target

LegacyPhasmo.rar
Size

634KB
MD5

b2800c86cdb04d471af2a27f3f7e416a
SHA1

1869929454f4d0b05fb4f51d1983e30be17a28ab
SHA256

ac8a08a5dd79ab90a206fe5f79c6d0982a3d9f21ea23daae9e0a04a0edd65892
SHA512

2d0e779995ad70a6d3176bf1a23a2d3b491f107b57ab4e768dcab3fa6fb1fd908e730a9e84b920727166950164ac68c5f6a4417276e35e7b2f23dafb056ed731
SSDEEP

12288:oEKaaOVozcA11bqV5kJPU/HJOoP84EaLROyu5718CSJo3oLcgsa6Tp5Q5:L+zPebkiPJOoP35s1h8Zo8R695E

Score

10^/10

rat umbral dcrat

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1239969504654655528/VeqtFqysqjPq1RBqiaPnt8f3X7OZKPfU8tkQRyN212Fwc2hm58OjrMT9W-FnzCFUxfPD

Signatures

DCRat payload 1 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
static1/unpack001/LegacyPhasmo/start.bat	dcrat

Dcrat family
dcrat

Detect Umbral payload 1 IoCs

resource	yara_rule
static1/unpack001/LegacyPhasmo/LegacyPhasmo.exe	family_umbral

Umbral family
umbral

Unsigned PE 2 IoCs

Checks for missing Authenticode signature.

resource
unpack001/LegacyPhasmo/LegacyPhasmo.exe
unpack001/LegacyPhasmo/start.bat

Files

LegacyPhasmo.rar
.rar

Password: infected
LegacyPhasmo/LegacyPhasmo.exe
.exe windows:4 windows x86 arch:x86

Password: infected

f34d5f2d4577ed6d9ceec516c1f5a744

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
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_LARGE_ADDRESS_AWARE
IMAGE_FILE_32BIT_MACHINE

Imports

mscoree

_CorExeMain

Sections

.text
Size: 228KB - Virtual size: 228KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rsrc
Size: 266KB - Virtual size: 265KB

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
LegacyPhasmo/start.bat
.exe windows:5 windows x86 arch:x86

Password: infected

fcf1390e9ce472c7270447fc5c61a0c1

Headers

DLL Characteristics

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_32BIT_MACHINE

PDB Paths

D:\Projects\WinRAR\sfx\build\sfxrar32\Release\sfxrar.pdb

Imports

kernel32

GetLastError
SetLastError
FormatMessageW
GetCurrentProcess
DeviceIoControl
SetFileTime
CloseHandle
CreateDirectoryW
RemoveDirectoryW
CreateFileW
DeleteFileW
CreateHardLinkW
GetShortPathNameW
GetLongPathNameW
MoveFileW
GetFileType
GetStdHandle
WriteFile
ReadFile
FlushFileBuffers
SetEndOfFile
SetFilePointer
SetFileAttributesW
GetFileAttributesW
FindClose
FindFirstFileW
FindNextFileW
GetVersionExW
GetCurrentDirectoryW
GetFullPathNameW
FoldStringW
GetModuleFileNameW
GetModuleHandleW
FindResourceW
FreeLibrary
GetProcAddress
GetCurrentProcessId
ExitProcess
SetThreadExecutionState
Sleep
LoadLibraryW
GetSystemDirectoryW
CompareStringW
AllocConsole
FreeConsole
AttachConsole
WriteConsoleW
GetProcessAffinityMask
CreateThread
SetThreadPriority
InitializeCriticalSection
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
SetEvent
ResetEvent
ReleaseSemaphore
WaitForSingleObject
CreateEventW
CreateSemaphoreW
GetSystemTime
SystemTimeToTzSpecificLocalTime
TzSpecificLocalTimeToSystemTime
SystemTimeToFileTime
FileTimeToLocalFileTime
LocalFileTimeToFileTime
FileTimeToSystemTime
GetCPInfo
IsDBCSLeadByte
MultiByteToWideChar
WideCharToMultiByte
GlobalAlloc
LockResource
GlobalLock
GlobalUnlock
GlobalFree
LoadResource
SizeofResource
SetCurrentDirectoryW
GetExitCodeProcess
GetLocalTime
GetTickCount
MapViewOfFile
UnmapViewOfFile
CreateFileMappingW
OpenFileMappingW
GetCommandLineW
SetEnvironmentVariableW
ExpandEnvironmentStringsW
GetTempPathW
MoveFileExW
GetLocaleInfoW
GetTimeFormatW
GetDateFormatW
GetNumberFormatW
SetFilePointerEx
GetConsoleMode
GetConsoleCP
HeapSize
SetStdHandle
GetProcessHeap
RaiseException
GetSystemInfo
VirtualProtect
VirtualQuery
LoadLibraryExA
IsProcessorFeaturePresent
IsDebuggerPresent
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetStartupInfoW
QueryPerformanceCounter
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
TerminateProcess
RtlUnwind
EncodePointer
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
LoadLibraryExW
QueryPerformanceFrequency
GetModuleHandleExW
GetModuleFileNameA
GetACP
HeapFree
HeapAlloc
HeapReAlloc
GetStringTypeW
LCMapStringW
FindFirstFileExA
FindNextFileA
IsValidCodePage
GetOEMCP
GetCommandLineA
GetEnvironmentStringsW
FreeEnvironmentStringsW
DecodePointer

gdiplus

GdiplusShutdown
GdiplusStartup
GdipCreateHBITMAPFromBitmap
GdipCreateBitmapFromStreamICM
GdipCreateBitmapFromStream
GdipDisposeImage
GdipCloneImage
GdipFree
GdipAlloc

Sections

.text
Size: 196KB - Virtual size: 196KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 42KB - Virtual size: 41KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 4KB - Virtual size: 141KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.didat
Size: 512B - Virtual size: 392B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 56KB - Virtual size: 55KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 9KB - Virtual size: 8KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Extracted

Signatures

Files

Password: infected

Password: infected

f34d5f2d4577ed6d9ceec516c1f5a744

Headers

DLL Characteristics

File Characteristics

Imports

mscoree

Sections

.text Size: 228KB - Virtual size: 228KB

.rsrc Size: 266KB - Virtual size: 265KB

.reloc Size: 512B - Virtual size: 12B

Password: infected

fcf1390e9ce472c7270447fc5c61a0c1

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

kernel32

gdiplus

Sections

.text Size: 196KB - Virtual size: 196KB

.rdata Size: 42KB - Virtual size: 41KB

.data Size: 4KB - Virtual size: 141KB

.didat Size: 512B - Virtual size: 392B

.rsrc Size: 56KB - Virtual size: 55KB

.reloc Size: 9KB - Virtual size: 8KB

.text
Size: 228KB - Virtual size: 228KB

.rsrc
Size: 266KB - Virtual size: 265KB

.reloc
Size: 512B - Virtual size: 12B

.text
Size: 196KB - Virtual size: 196KB

.rdata
Size: 42KB - Virtual size: 41KB

.data
Size: 4KB - Virtual size: 141KB

.didat
Size: 512B - Virtual size: 392B

.rsrc
Size: 56KB - Virtual size: 55KB

.reloc
Size: 9KB - Virtual size: 8KB