2024-08-14_bcc8b76ef33561a7591630b69042f706_ryuk

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General

Target

2024-08-14_bcc8b76ef33561a7591630b69042f706_ryuk
Size

5.0MB
MD5

bcc8b76ef33561a7591630b69042f706
SHA1

5c2db85f2e741bf6ec1923b36d55d7db6b50ad8f
SHA256

fdcf41c4b698e907ac4c4f5eb614960eff1599af7f685ea86f9b86f0729cf1d9
SHA512

9e7bcc19c140f32e5cd2793c224aac895dffa1ba4bc7db881fa1b018de36b27aab427dae4e7bf6650cf7459e67b121b39b43ad22167176be2a26638c4376eec4
SSDEEP

49152:0HMv2C+j2xFKPTdVwASO7Gtlq3tIU6iEytHr1DX3eY0+xc/FpsoAxXxZmZyUGwJX:sa+vMN+xc/DsoAxX8UI1j2jrJzsdgU

Score

3^/10

Malware Config

Signatures

Embeds OpenSSL 1 IoCs

Embeds OpenSSL, may be used to circumvent TLS interception.

resource	yara_rule
sample	embeds_openssl

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2024-08-14_bcc8b76ef33561a7591630b69042f706_ryuk

Files

2024-08-14_bcc8b76ef33561a7591630b69042f706_ryuk
.exe windows:6 windows x64 arch:x64

edcc0a5280020d230474f5e410333b24

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

kernel32

AcquireSRWLockExclusive
AcquireSRWLockShared
CloseHandle
CompareStringW
ConvertFiberToThread
ConvertThreadToFiber
CreateEventW
CreateFiber
CreateFileW
CreateSemaphoreA
CreateThread
DecodePointer
DeleteCriticalSection
DeleteFiber
DeleteFileW
EncodePointer
EnterCriticalSection
EnumCalendarInfoW
EnumSystemLocalesW
ExitProcess
ExitThread
FileTimeToSystemTime
FindClose
FindFirstFileA
FindFirstFileExW
FindFirstFileW
FindNextFileA
FindNextFileW
FlushFileBuffers
FlushInstructionCache
FormatMessageA
FormatMessageW
FreeEnvironmentStringsW
FreeLibrary
FreeLibraryAndExitThread
GetACP
GetCPInfo
GetCommandLineA
GetCommandLineW
GetConsoleCP
GetConsoleMode
GetConsoleScreenBufferInfo
GetCurrentDirectoryA
GetCurrentDirectoryW
GetCurrentProcess
GetCurrentProcessId
GetCurrentThread
GetCurrentThreadId
GetDateFormatW
GetDriveTypeW
GetDynamicTimeZoneInformation
GetEnvironmentStringsW
GetEnvironmentVariableA
GetEnvironmentVariableW
GetExitCodeThread
GetFileInformationByHandle
GetFileSizeEx
GetFileType
GetFullPathNameW
GetLastError
GetLocaleInfoW
GetModuleFileNameW
GetModuleHandleA
GetModuleHandleExW
GetModuleHandleW
GetOEMCP
GetProcAddress
GetProcessHeap
GetStartupInfoW
GetStdHandle
GetStringTypeW
GetSystemDirectoryA
GetSystemDirectoryW
GetSystemTime
GetSystemTimeAsFileTime
GetThreadContext
GetTickCount
GetTimeFormatW
GetTimeZoneInformation
GetUserDefaultLCID
HeapAlloc
HeapFree
HeapReAlloc
HeapSize
InitializeCriticalSection
InitializeCriticalSectionAndSpinCount
InitializeCriticalSectionEx
InitializeSListHead
InitializeSRWLock
IsDebuggerPresent
IsProcessorFeaturePresent
IsValidCodePage
IsValidLocale
LCMapStringEx
LCMapStringW
LeaveCriticalSection
LoadLibraryA
LoadLibraryExW
LoadLibraryW
MoveFileExW
MultiByteToWideChar
PeekNamedPipe
QueryPerformanceCounter
QueryPerformanceFrequency
RaiseException
ReadConsoleA
ReadConsoleW
ReadFile
ReleaseSRWLockExclusive
ReleaseSRWLockShared
ReleaseSemaphore
ResumeThread
RtlCaptureContext
RtlLookupFunctionEntry
RtlPcToFileHeader
RtlUnwind
RtlUnwindEx
RtlVirtualUnwind
SetConsoleCtrlHandler
SetConsoleMode
SetConsoleTextAttribute
SetEndOfFile
SetEnvironmentVariableW
SetEvent
SetFilePointerEx
SetLastError
SetStdHandle
SetThreadContext
SetUnhandledExceptionFilter
Sleep
SleepConditionVariableSRW
SleepEx
SuspendThread
SwitchToFiber
SystemTimeToFileTime
SystemTimeToTzSpecificLocalTime
TerminateProcess
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
TryAcquireSRWLockExclusive
UnhandledExceptionFilter
VerSetConditionMask
VerifyVersionInfoW
VirtualAlloc
VirtualFree
VirtualProtect
VirtualProtectEx
VirtualQuery
VirtualQueryEx
WaitForMultipleObjects
WaitForSingleObject
WaitForSingleObjectEx
WakeAllConditionVariable
WakeConditionVariable
WideCharToMultiByte
WriteConsoleA
WriteConsoleW
WriteFile

user32

CreateWindowExW
GetDC
GetProcessWindowStation
GetUserObjectInformationW
MessageBoxW
ReleaseDC

gdi32

GetDeviceGammaRamp

imm32

ImmAssociateContext
ImmCreateContext
ImmDestroyContext
ImmGetContext
ImmGetConversionStatus
ImmReleaseContext
ImmSetConversionStatus

ws2_32

WSACleanup
WSACloseEvent
WSACreateEvent
WSAEnumNetworkEvents
WSAEventSelect
WSAGetLastError
WSAIoctl
WSAResetEvent
WSASetLastError
WSAStartup
WSAWaitForMultipleEvents
__WSAFDIsSet
accept
bind
closesocket
connect
freeaddrinfo
getaddrinfo
gethostbyaddr
gethostbyname
gethostname
getpeername
getservbyname
getservbyport
getsockname
getsockopt
htonl
htons
inet_addr
inet_ntoa
inet_ntop
inet_pton
ioctlsocket
listen
ntohs
recv
recvfrom
select
send
sendto
setsockopt
shutdown
socket

advapi32

CryptAcquireContextW
CryptCreateHash
CryptDecrypt
CryptDestroyHash
CryptDestroyKey
CryptEncrypt
CryptEnumProvidersW
CryptExportKey
CryptGenRandom
CryptGetHashParam
CryptGetProvParam
CryptGetUserKey
CryptHashData
CryptImportKey
CryptReleaseContext
CryptSetHashParam
CryptSignHashW
DeregisterEventSource
RegisterEventSourceW
ReportEventW

bcrypt

BCryptGenRandom

crypt32

CertAddCertificateContextToStore
CertCloseStore
CertCreateCertificateChainEngine
CertDuplicateCertificateContext
CertEnumCertificatesInStore
CertFindCertificateInStore
CertFindExtension
CertFreeCertificateChain
CertFreeCertificateChainEngine
CertFreeCertificateContext
CertGetCertificateChain
CertGetCertificateContextProperty
CertGetNameStringW
CertOpenStore
CertOpenSystemStoreW
CryptDecodeObjectEx
CryptQueryObject
CryptStringToBinaryW
PFXImportCertStore

Sections

.text
Size: 3.7MB - Virtual size: 3.7MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 985KB - Virtual size: 985KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 34KB - Virtual size: 61KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 166KB - Virtual size: 166KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.00cfg
Size: 512B - Virtual size: 56B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.detourc
Size: 8KB - Virtual size: 8KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.detourd
Size: 512B - Virtual size: 24B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.tls
Size: 512B - Virtual size: 337B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

_RDATA
Size: 512B - Virtual size: 500B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 42KB - Virtual size: 42KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 43KB - Virtual size: 43KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

edcc0a5280020d230474f5e410333b24

Headers

DLL Characteristics

File Characteristics

Imports

kernel32

user32

gdi32

imm32

ws2_32

advapi32

bcrypt

crypt32

Sections

.text Size: 3.7MB - Virtual size: 3.7MB

.rdata Size: 985KB - Virtual size: 985KB

.data Size: 34KB - Virtual size: 61KB

.pdata Size: 166KB - Virtual size: 166KB

.00cfg Size: 512B - Virtual size: 56B

.detourc Size: 8KB - Virtual size: 8KB

.detourd Size: 512B - Virtual size: 24B

.tls Size: 512B - Virtual size: 337B

_RDATA Size: 512B - Virtual size: 500B

.rsrc Size: 42KB - Virtual size: 42KB

.reloc Size: 43KB - Virtual size: 43KB

.text
Size: 3.7MB - Virtual size: 3.7MB

.rdata
Size: 985KB - Virtual size: 985KB

.data
Size: 34KB - Virtual size: 61KB

.pdata
Size: 166KB - Virtual size: 166KB

.00cfg
Size: 512B - Virtual size: 56B

.detourc
Size: 8KB - Virtual size: 8KB

.detourd
Size: 512B - Virtual size: 24B

.tls
Size: 512B - Virtual size: 337B

_RDATA
Size: 512B - Virtual size: 500B

.rsrc
Size: 42KB - Virtual size: 42KB

.reloc
Size: 43KB - Virtual size: 43KB