umbral | 4b64b08789791f49a88c79ad4c0eae5628fe7547489f958312f53c95f23403ff

Sharing

Copy URL

Twitter E-mail

General

Target

4b64b08789791f49a88c79ad4c0eae5628fe7547489f958312f53c95f23403ff
Size

10.2MB
MD5

187ec6be5a50e8a2297c01572fa530a7
SHA1

bf99963dccd7bbd5bb10ec9c3fff5d3698c7654d
SHA256

4b64b08789791f49a88c79ad4c0eae5628fe7547489f958312f53c95f23403ff
SHA512

34f9e6248874a277d6c25472d110ebc72fe69b783ca5cf288bed7376e71ef3ff98f4c23f89f4e538da66210179cd19c5cbc2308585db389c51ee25e68501a9a3
SSDEEP

196608:lKsYOJ2/S+rSQxCCpbEaxK/Q6iuI5uOf8lwTSd4NBLSeM3HcZs/Dv:gDOwS+4CpAaxqQ6ip5x43d8Lgeg

Score

10^/10

pyinstaller umbral

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1271643069317644288/Yi3JdjrXJ2C95angH0OndOPpWxWydgLtEZVOUV6s32Pf81SxCWBNaV19zjvPX6j0yW0O

Signatures

Detect Umbral payload 3 IoCs

resource	yara_rule
static1/unpack001/citrontoppest/citrontoppest/Citronyuh.exe	family_umbral
static1/unpack001/citrontoppest/citrontoppest/citrontoppest/updatechecker/updatecheckercitron.exe	family_umbral
static1/unpack001/citrontoppest/citrontoppest/updatechecker/updatecheckercitron.exe	family_umbral

Umbral family
umbral

Detects Pyinstaller 1 IoCs

pyinstaller

resource	yara_rule
static1/unpack001/citrontoppest/citrontoppest/citrontoppest/citronuh.exe	pyinstaller

Unsigned PE 4 IoCs

Checks for missing Authenticode signature.

resource
unpack001/citrontoppest/citrontoppest/Citronyuh.exe
unpack001/citrontoppest/citrontoppest/citrontoppest/citronuh.exe
unpack001/citrontoppest/citrontoppest/citrontoppest/updatechecker/updatecheckercitron.exe
unpack001/citrontoppest/citrontoppest/updatechecker/updatecheckercitron.exe

Files

4b64b08789791f49a88c79ad4c0eae5628fe7547489f958312f53c95f23403ff
.rar
citrontoppest/citrontoppest/Citronyuh.exe
.exe windows:4 windows x86 arch:x86

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: 224KB - Virtual size: 224KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rsrc
Size: 1KB - Virtual size: 1KB

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
citrontoppest/citrontoppest/README.txt
citrontoppest/citrontoppest/citrontoppest/README.txt
citrontoppest/citrontoppest/citrontoppest/citronuh.exe
.exe windows:6 windows x64 arch:x64

72c4e339b7af8ab1ed2eb3821c98713a

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

user32

CreateWindowExW
ShutdownBlockReasonCreate
MsgWaitForMultipleObjects
ShowWindow
DestroyWindow
RegisterClassW
DefWindowProcW
PeekMessageW
DispatchMessageW
TranslateMessage
PostMessageW
GetMessageW
MessageBoxW
MessageBoxA
SystemParametersInfoW
DestroyIcon
SetWindowLongPtrW
GetWindowLongPtrW
GetClientRect
InvalidateRect
ReleaseDC
GetDC
DrawTextW
GetDialogBaseUnits
EndDialog
DialogBoxIndirectParamW
MoveWindow
SendMessageW

comctl32

ord380

kernel32

GetACP
IsValidCodePage
GetStringTypeW
GetFileAttributesExW
SetEnvironmentVariableW
FlushFileBuffers
GetCurrentDirectoryW
LCMapStringW
CompareStringW
FlsFree
GetOEMCP
GetCPInfo
GetModuleHandleW
MulDiv
FormatMessageW
GetLastError
GetModuleFileNameW
LoadLibraryExW
SetDllDirectoryW
CreateSymbolicLinkW
GetProcAddress
GetEnvironmentStringsW
GetCommandLineW
GetEnvironmentVariableW
ExpandEnvironmentStringsW
DeleteFileW
FindClose
FindFirstFileW
FindNextFileW
GetDriveTypeW
RemoveDirectoryW
GetTempPathW
CloseHandle
QueryPerformanceCounter
QueryPerformanceFrequency
WaitForSingleObject
Sleep
GetCurrentProcess
TerminateProcess
GetExitCodeProcess
CreateProcessW
GetStartupInfoW
FreeLibrary
LocalFree
SetConsoleCtrlHandler
K32EnumProcessModules
K32GetModuleFileNameExW
CreateFileW
FindFirstFileExW
GetFinalPathNameByHandleW
MultiByteToWideChar
WideCharToMultiByte
FlsSetValue
FreeEnvironmentStringsW
GetProcessHeap
GetTimeZoneInformation
HeapSize
HeapReAlloc
WriteConsoleW
SetEndOfFile
CreateDirectoryW
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
IsProcessorFeaturePresent
GetCurrentProcessId
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
IsDebuggerPresent
RtlUnwindEx
SetLastError
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
EncodePointer
RaiseException
RtlPcToFileHeader
GetCommandLineA
GetFileInformationByHandle
GetFileType
PeekNamedPipe
SystemTimeToTzSpecificLocalTime
FileTimeToSystemTime
ReadFile
GetFullPathNameW
SetStdHandle
GetStdHandle
WriteFile
ExitProcess
GetModuleHandleExW
HeapFree
GetConsoleMode
ReadConsoleW
SetFilePointerEx
GetConsoleOutputCP
GetFileSizeEx
HeapAlloc
FlsAlloc
FlsGetValue

advapi32

OpenProcessToken
GetTokenInformation
ConvertStringSecurityDescriptorToSecurityDescriptorW
ConvertSidToStringSidW

gdi32

SelectObject
DeleteObject
CreateFontIndirectW

Sections

.text
Size: 168KB - Virtual size: 167KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 75KB - Virtual size: 74KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 3KB - Virtual size: 20KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

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
cstealer.pyc
citrontoppest/citrontoppest/citrontoppest/updatechecker/updatecheckercitron.exe
.exe windows:4 windows x86 arch:x86

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: 224KB - Virtual size: 224KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rsrc
Size: 1KB - Virtual size: 1KB

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
citrontoppest/citrontoppest/updatechecker/updatecheckercitron.exe
.exe windows:4 windows x86 arch:x86

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: 224KB - Virtual size: 224KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rsrc
Size: 1KB - Virtual size: 1KB

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

Sharing

General

Malware Config

Extracted

Signatures

Files

f34d5f2d4577ed6d9ceec516c1f5a744

Headers

DLL Characteristics

File Characteristics

Imports

mscoree

Sections

.text Size: 224KB - Virtual size: 224KB

.rsrc Size: 1KB - Virtual size: 1KB

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

72c4e339b7af8ab1ed2eb3821c98713a

Headers

DLL Characteristics

File Characteristics

Imports

user32

comctl32

kernel32

advapi32

gdi32

Sections

.text Size: 168KB - Virtual size: 167KB

.rdata Size: 75KB - Virtual size: 74KB

.data Size: 3KB - Virtual size: 20KB

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

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

.reloc Size: 2KB - Virtual size: 1KB

f34d5f2d4577ed6d9ceec516c1f5a744

Headers

DLL Characteristics

File Characteristics

Imports

mscoree

Sections

.text Size: 224KB - Virtual size: 224KB

.rsrc Size: 1KB - Virtual size: 1KB

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

f34d5f2d4577ed6d9ceec516c1f5a744

Headers

DLL Characteristics

File Characteristics

Imports

mscoree

Sections

.text Size: 224KB - Virtual size: 224KB

.rsrc Size: 1KB - Virtual size: 1KB

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

.text
Size: 224KB - Virtual size: 224KB

.rsrc
Size: 1KB - Virtual size: 1KB

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

.text
Size: 168KB - Virtual size: 167KB

.rdata
Size: 75KB - Virtual size: 74KB

.data
Size: 3KB - Virtual size: 20KB

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

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

.reloc
Size: 2KB - Virtual size: 1KB

.text
Size: 224KB - Virtual size: 224KB

.rsrc
Size: 1KB - Virtual size: 1KB

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

.text
Size: 224KB - Virtual size: 224KB

.rsrc
Size: 1KB - Virtual size: 1KB

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