cobaltstrike | 2023-08-25_a6b76a29733906ed85602be63fd6f21a_cobalt-strike_cobaltstrike_meterpreter_JC[.]exe

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General

Target
2023-08-25_a6b76a29733906ed85602be63fd6f21a_cobalt-strike_cobaltstrike_meterpreter_JC.exe
Size 208KB
Sample231013-z3kddsce93
SHA256 335019a2df320f1d67cffdf222c4fa40ba7c471ddeaa88d0a17f59b3552b15c2
MD5 a6b76a29733906ed85602be63fd6f21a
SHA1 3e5dc82a18e92f4f96d6db2cd143bef232ab11ea
SHA512 c41c1114e4f519e9dc70b128669028e40d4b4b8f5fa661dc0ea9dc94e67525b48e9669792b99799b6bfa65cbe69a620066d43ef5ee86a6422a3197ec8e6dcde3
SSDEEP 3072:LI6CqRCxffkClZ8Ccn7LQlRw6x+Y3CxT2DtK5jdUKY5rS:LIDff9D8C6XYRw6MT2DEjB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

100000 cobaltstrike

Malware Config

Extracted

Family

cobaltstrike

Botnet

100000

http://121.5.147.57:30132/load

Attributes

access_type
512
beacon_type
2048
host
121.5.147.57,/load
http_header1
AAAABwAAAAAAAAADAAAABgAAAAZDb29raWUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
http_header2
AAAACgAAACZDb250ZW50LVR5cGU6IGFwcGxpY2F0aW9uL29jdGV0LXN0cmVhbQAAAAcAAAAAAAAABQAAAAJpZAAAAAcAAAABAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
http_method1
GET
http_method2
POST
polling_time
60000
port_number
30132
sc_process32
%windir%\syswow64\rundll32.exe
sc_process64
%windir%\sysnative\rundll32.exe
state_machine
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDTM91gVVkGBH9d3sSoox4j3I/NHX+Xerbm0eZrXB/0/dOz8XqOFxsSXC1VgilXji1AxIjSdBRfqwT9N9AHEPH9gW16aMXsOyv33OHLGckImjmks5pu57iRU/TpaaW/0wLxil5CRMeX56lhE7bm0UJeXj6OLJOgo92nxlxWtQJpZwIDAQABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
unknown1
4096
unknown2
AAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
uri
/submit.php
user_agent
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; LBBROWSER)
watermark
100000

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
2023-08-25_a6b76a29733906ed85602be63fd6f21a_cobalt-strike_cobaltstrike_meterpreter_JC.exe

File Explorer

2023-08-25_a6b76a29733906ed85602be63fd6f21a_cobalt-strike_cobaltstrike_meterpreter_JC.exe

.dll 208KB

2023-08-25_a6b76a29733906ed85602be63fd6f21a_cobalt-strike_cobaltstrike_meterpreter_JC.exe

IMPHASH cef0a8b67e0adea9dbc532568c79bb24
SHA256 335019a2df320f1d67cffdf222c4fa40ba7c471ddeaa88d0a17f59b3552b15c2
MD5 a6b76a29733906ed85602be63fd6f21a
SHA1 3e5dc82a18e92f4f96d6db2cd143bef232ab11ea
SHA512 c41c1114e4f519e9dc70b128669028e40d4b4b8f5fa661dc0ea9dc94e67525b48e9669792b99799b6bfa65cbe69a620066d43ef5ee86a6422a3197ec8e6dcde3
SSDEEP 3072:LI6CqRCxffkClZ8Ccn7LQlRw6x+Y3CxT2DtK5jdUKY5rS:LIDff9D8C6XYRw6MT2DEjB
MD5 SHA1 SHA512 SSDEEP

windows:5 windows x86

Cobalt Strike reflective loader

Detects the reflective loader used by Cobalt Strike.
Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

93381

Magic Number

267

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

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

PDB paths

kernel32

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

advapi32

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

wininet

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

ws2_32

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