2024-04-07_4cd331c21f5b43dfe2f41fd55ff8be08_cobalt-strike_ryuk

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General

Target
2024-04-07_4cd331c21f5b43dfe2f41fd55ff8be08_cobalt-strike_ryuk
Size 796KB
Sample240407-w1f2eabc35
SHA256 7f61c22d966d4d79048c0bcadf5e4720c73b26f645aee7aa9e5ecc791310bb25
MD5 4cd331c21f5b43dfe2f41fd55ff8be08
SHA1 495818cb03169d3e67ad6aec36e483d3ad8b72f8
SHA512 95e3e513d902ea4f5f9716a1b96fd043abfd897820348c9d362c4a7637b44a1733c8c6b76b5cc4ace6942d2985d59ff0d4e3224ccd261943f90269c18bacc345
SSDEEP 12288:GXDCAZzP/w24lh53Dbif4YAJ93y1NrLiLtJ8nBxu7DCOzRq8DvQgqAbhI:RANw2435Hofe3y1sInB2COzRq8DvFqt
MD5 SHA1 SHA512 SSDEEP

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2024-04-07_4cd331c21f5b43dfe2f41fd55ff8be08_cobalt-strike_ryuk

File Explorer

2024-04-07_4cd331c21f5b43dfe2f41fd55ff8be08_cobalt-strike_ryuk

.exe 796KB

2024-04-07_4cd331c21f5b43dfe2f41fd55ff8be08_cobalt-strike_ryuk

IMPHASH 33d31a4df5121c8c368d8b7a65733fa3
SHA256 7f61c22d966d4d79048c0bcadf5e4720c73b26f645aee7aa9e5ecc791310bb25
MD5 4cd331c21f5b43dfe2f41fd55ff8be08
SHA1 495818cb03169d3e67ad6aec36e483d3ad8b72f8
SHA512 95e3e513d902ea4f5f9716a1b96fd043abfd897820348c9d362c4a7637b44a1733c8c6b76b5cc4ace6942d2985d59ff0d4e3224ccd261943f90269c18bacc345
SSDEEP 12288:GXDCAZzP/w24lh53Dbif4YAJ93y1NrLiLtJ8nBxu7DCOzRq8DvQgqAbhI:RANw2435Hofe3y1sInB2COzRq8DvFqt
MD5 SHA1 SHA512 SSDEEP

windows:6 windows x64 arch:x64

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

62432

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA IMAGE_DLLCHARACTERISTICS_NX_COMPAT IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LARGE_ADDRESS_AWARE

PDB paths

z:\task_1579288126\build\src\obj-firefox\toolkit\components\maintenanceservice\maintenanceservice.pdb

user32

LoadStringA wsprintfW

advapi32

AdjustTokenPrivileges AllocateAndInitializeSid BuildExplicitAccessWithNameW ChangeServiceConfig2W ChangeServiceConfigW CloseServiceHandle ControlService CreateServiceW CreateWellKnownSid CryptAcquireContextA CryptCreateHash CryptDestroyHash CryptGetHashParam CryptHashData CryptReleaseContext DeleteService FreeSid GetEffectiveRightsFromAclW GetSecurityDescriptorDacl GetSecurityInfo InitializeSecurityDescriptor LookupAccountSidW LookupPrivilegeValueA OpenProcessToken OpenSCManagerA OpenSCManagerW OpenServiceW QueryServiceConfigW QueryServiceObjectSecurity QueryServiceStatus QueryServiceStatusEx RegCloseKey RegEnumKeyExW RegGetValueW RegOpenKeyExW RegQueryInfoKeyW RegQueryValueExW RegSetValueExW RegisterServiceCtrlHandlerW SetEntriesInAclW SetSecurityDescriptorDacl SetSecurityInfo SetServiceObjectSecurity SetServiceStatus StartServiceCtrlDispatcherW

crypt32

CertCloseStore CertFindCertificateInStore CertFreeCertificateContext CertGetNameStringA CertGetNameStringW CryptMsgClose CryptMsgGetParam CryptQueryObject

ole32

CoTaskMemFree

rpcrt4

RpcStringFreeW UuidCreate UuidToStringW

shell32

SHFileOperationW SHGetKnownFolderPath

wintrust

WinVerifyTrust

shlwapi

PathAppendW PathCanonicalizeW PathIsUNCServerShareW PathQuoteSpacesW PathRemoveFileSpecW PathStripPathW PathStripToRootW PathUnquoteSpacesW

version

GetFileVersionInfoSizeW GetFileVersionInfoW VerQueryValueW

kernel32

CloseHandle CompareStringW CopyFileW CreateDirectoryW CreateEventW CreateFileW CreateProcessW CreateThread CreateToolhelp32Snapshot DeleteCriticalSection DeleteFileW DeviceIoControl EncodePointer EnterCriticalSection ExitProcess FindClose FindFirstFileExW FindFirstFileW FindNextFileW FlushFileBuffers FreeEnvironmentStringsW FreeLibrary GetACP GetCPInfo GetCommandLineA GetCommandLineW GetConsoleCP GetConsoleMode GetCurrentProcess GetCurrentProcessId GetCurrentThreadId GetDriveTypeW GetEnvironmentStringsW GetExitCodeProcess GetFileAttributesW GetFileInformationByHandle GetFileSize GetFileType GetFullPathNameW GetLastError GetModuleFileNameW GetModuleHandleExW GetModuleHandleW GetOEMCP GetProcAddress GetProcessHeap GetStartupInfoW GetStdHandle GetStringTypeW GetSystemTimeAsFileTime HeapAlloc HeapFree HeapReAlloc HeapSize InitializeCriticalSectionAndSpinCount InitializeSListHead IsDebuggerPresent IsProcessorFeaturePresent IsValidCodePage LCMapStringW LeaveCriticalSection LoadLibraryExW LocalAlloc LocalFree MoveFileExW MoveFileW MultiByteToWideChar Process32FirstW Process32NextW QueryPerformanceCounter RaiseException ReadConsoleW ReadFile ResetEvent RtlCaptureContext RtlLookupFunctionEntry RtlPcToFileHeader RtlUnwind RtlUnwindEx RtlVirtualUnwind SetEndOfFile SetEnvironmentVariableW SetEvent SetFileAttributesW SetFilePointerEx SetLastError SetStdHandle SetUnhandledExceptionFilter Sleep TerminateProcess TlsAlloc TlsFree TlsGetValue TlsSetValue UnhandledExceptionFilter WaitForSingleObject WaitForSingleObjectEx WideCharToMultiByte WriteConsoleW WriteFile lstrcmpiW

Name

.text

Size

157KB

Virtual Size

156KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

57KB

Virtual Size

56KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

3KB

Virtual Size

8KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

7KB

Virtual Size

6KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.00cfg

Size

512B

Virtual Size

16B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.tls

Size

512B

Virtual Size

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

2KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

568KB

Virtual Size

572KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Sharing

General

Malware Config

Signatures

File Explorer

2024-04-07_4cd331c21f5b43dfe2f41fd55ff8be08_cobalt-strike_ryuk

user32

advapi32

crypt32

ole32

rpcrt4

shell32

wintrust

shlwapi

version

kernel32

generic