cobaltstrike | beacon[.]dll

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General

Target

beacon.dll
Size

240KB
MD5

b1764234f73a61e8b0e51759176cc788
SHA1

42b6ef1e50e2870af16984a5ebd5b98a9694b791
SHA256

6f5fa246f511be1f9936ef34b3e53d0455a0574f0bbc7eae712459a6a7d936c8
SHA512

0d9f949ae2174b2f2521204599fa5bff43363dc128dfb5b4771279c332f4de04b7632b4e2d874db2674d18d79047d515840f3c06db72832fab8f9e9aff253499
SSDEEP

3072:2mkH4V2aLdAJJ5WcZW4TH25KXs8o66yWpQJU6fUzpqtcWGQT0JkZgj9Ud54jNe3D:jkvae5Wck4CAal6U6MzJkejZ8CoV6yk

Score

10^/10

cobaltstrike

Malware Config

Signatures

Cobalt Strike reflective loader 1 IoCs

Detects the reflective loader used by Cobalt Strike.

resource	yara_rule
sample	cobalt_reflective_dll

Cobaltstrike family
cobaltstrike

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
beacon.dll

Files

beacon.dll
.dll windows:5 windows x86 arch:x86

efcb9a284ba0d82f0dc434687c954afe

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL
IMAGE_FILE_BYTES_REVERSED_HI

Imports

kernel32

CreateNamedPipeA
CreateProcessA
TerminateProcess
GetCurrentDirectoryW
GetFullPathNameA
SystemTimeToTzSpecificLocalTime
GetLogicalDrives
ExpandEnvironmentStringsA
GetFileAttributesA
FileTimeToSystemTime
FindFirstFileA
CopyFileA
FindClose
MoveFileA
FindNextFileA
GetCurrentProcessId
Thread32First
Thread32Next
CreateToolhelp32Snapshot
CreateThread
SetLastError
GetVersionExA
VirtualAlloc
VirtualProtect
CreateFileA
PeekNamedPipe
WaitNamedPipeA
SetNamedPipeHandleState
GetComputerNameA
GetACP
GetModuleFileNameA
GetOEMCP
DeleteProcThreadAttributeList
GetProcessHeap
InitializeProcThreadAttributeList
SetErrorMode
UpdateProcThreadAttribute
ProcessIdToSessionId
Process32First
Process32Next
GetComputerNameExA
GetThreadContext
SetThreadContext
MapViewOfFile
UnmapViewOfFile
VirtualQuery
VirtualFree
CreateRemoteThread
ReadFile
ReadProcessMemory
VirtualProtectEx
VirtualAllocEx
OpenThread
CreateFileMappingA
DuplicateHandle
CloseHandle
WriteProcessMemory
ResumeThread
ExitProcess
ExitThread
GetCurrentThread
ConnectNamedPipe
GetCurrentProcess
GetCurrentDirectoryA
CreatePipe
GetLocalTime
GetStartupInfoA
SetCurrentDirectoryA
FlushFileBuffers
DisconnectNamedPipe
MultiByteToWideChar
WriteFile
GetTickCount
WaitForSingleObject
Sleep
GetModuleHandleA
LoadLibraryA
GetProcAddress
GetLastError
DebugBreak
RaiseException
GetModuleFileNameW
SetEnvironmentVariableW
HeapCreate
HeapDestroy
HeapFree
SetEnvironmentVariableA
CompareStringW
CompareStringA
SetEndOfFile
GetStringTypeW
GetStringTypeA
SetStdHandle
WriteConsoleW
GetConsoleOutputCP
WriteConsoleA
GetLocaleInfoA
HeapSize
QueryPerformanceCounter
GetEnvironmentStringsW
FreeEnvironmentStringsW
GetEnvironmentStrings
FreeEnvironmentStringsA
LCMapStringW
LCMapStringA
IsValidCodePage
GetCPInfo
SetFilePointer
GetFileType
SetHandleCount
GetConsoleMode
HeapAlloc
OpenProcess
FreeLibrary
GetModuleHandleW
DeleteFileA
CreateDirectoryA
RemoveDirectoryA
GetSystemTimeAsFileTime
HeapReAlloc
GetCurrentThreadId
GetCommandLineA
DeleteCriticalSection
LeaveCriticalSection
EnterCriticalSection
GetStdHandle
UnhandledExceptionFilter
SetUnhandledExceptionFilter
IsDebuggerPresent
TlsGetValue
TlsAlloc
TlsSetValue
TlsFree
InterlockedIncrement
InterlockedDecrement
InitializeCriticalSectionAndSpinCount
RtlUnwind
WideCharToMultiByte
GetConsoleCP

advapi32

LookupAccountSidA
OpenThreadToken
CryptReleaseContext
CryptAcquireContextA
CryptGenRandom
LogonUserA
CheckTokenMembership
FreeSid
RevertToSelf
AllocateAndInitializeSid
DuplicateTokenEx
OpenProcessToken
GetTokenInformation
GetUserNameA
CreateProcessWithTokenW
CreateProcessWithLogonW
CreateProcessAsUserA
AdjustTokenPrivileges
ImpersonateNamedPipeClient
ImpersonateLoggedOnUser
LookupPrivilegeValueA

wininet

InternetReadFile
InternetConnectA
InternetQueryDataAvailable
InternetSetOptionA
HttpOpenRequestA
HttpAddRequestHeadersA
InternetSetStatusCallback
HttpSendRequestA
InternetOpenA
InternetCloseHandle
InternetQueryOptionA
HttpQueryInfoA

ws2_32

ntohs
connect
socket
gethostbyname
send
WSAIoctl
recv
WSACleanup
closesocket
WSASocketA
ntohl
htons
htonl
shutdown
WSAGetLastError
ioctlsocket
accept
listen
__WSAFDIsSet
bind
sendto
select
inet_addr
recvfrom
WSAStartup

Exports

Exports

_ReflectiveLoader@4

Sections

.text
Size: 164KB - Virtual size: 168KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 39KB - Virtual size: 40KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.data
Size: 28KB - Virtual size: 64KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.reloc
Size: 6KB - Virtual size: 8KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

efcb9a284ba0d82f0dc434687c954afe

Headers

DLL Characteristics

File Characteristics

Imports

kernel32

advapi32

wininet

ws2_32

Exports

Exports

Sections

.text Size: 164KB - Virtual size: 168KB

.rdata Size: 39KB - Virtual size: 40KB

.data Size: 28KB - Virtual size: 64KB

.reloc Size: 6KB - Virtual size: 8KB

.text
Size: 164KB - Virtual size: 168KB

.rdata
Size: 39KB - Virtual size: 40KB

.data
Size: 28KB - Virtual size: 64KB

.reloc
Size: 6KB - Virtual size: 8KB