coffloader | 2026-05-03_e2230f8c0811a69186ac450fa12ac9cb_conti

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General

Target
2026-05-03_e2230f8c0811a69186ac450fa12ac9cb_conti
Size 741KB
Sample260503-ed3s8aez3r
SHA256 b9207362a79e10ece5feff7d382f3ee482668b47a4fcae9d2d5cbc112a82b138
MD5 e2230f8c0811a69186ac450fa12ac9cb
SHA1 f646e40f66ad9b4ffa11773f4528e7d4bbcccacb
SHA512 a941260feddb32fb67915583b7fa298ef42c42800fa5170bffc13c4a01bcd55b9207c63a82cfcd0987845dd94d0d937cdf507efa5be3fd9493ba934640c5cd6f
SSDEEP 12288:4k3Pt0QFoR8Ij+J4+L75hUF7QOSHJQF45NjvWDoF5:Z3l0QFoZjyl2W5NjvWDoF5
TLSH
T131F4068336CB1CFAEE93273844DB53366735FE708B6A8B6B4614E2321C135D1AD5AB50
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

loader coffloader

Malware Config

Signatures

Family: Coffloader
Coffloader is an open-source beacon loader written in C.
loader coffloader

Detects Coffloader 1 IoCs

resource	yara_rule
sample	family_coffloader

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2026-05-03_e2230f8c0811a69186ac450fa12ac9cb_conti

File Explorer

2026-05-03_e2230f8c0811a69186ac450fa12ac9cb_conti

.exe 741KB

2026-05-03_e2230f8c0811a69186ac450fa12ac9cb_conti

IMPHASH fa1a9ffcd7740fa586fde3a8011c0042
SHA256 b9207362a79e10ece5feff7d382f3ee482668b47a4fcae9d2d5cbc112a82b138
MD5 e2230f8c0811a69186ac450fa12ac9cb
SHA1 f646e40f66ad9b4ffa11773f4528e7d4bbcccacb
SHA512 a941260feddb32fb67915583b7fa298ef42c42800fa5170bffc13c4a01bcd55b9207c63a82cfcd0987845dd94d0d937cdf507efa5be3fd9493ba934640c5cd6f
SSDEEP 12288:4k3Pt0QFoR8Ij+J4+L75hUF7QOSHJQF45NjvWDoF5:Z3l0QFoZjyl2W5NjvWDoF5
TLSH
T131F4068336CB1CFAEE93273844DB53366735FE708B6A8B6B4614E2321C135D1AD5AB50
MD5 SHA1 SHA512 SSDEEP TLSH

windows:4 windows x64 arch:x64

Detects Coffloader
Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

5088

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LINE_NUMS_STRIPPED IMAGE_FILE_LARGE_ADDRESS_AWARE

PDB paths

advapi32

LookupPrivilegeValueW

kernel32

CloseHandle CreateEventA CreateFileA CreateSemaphoreA CreateToolhelp32Snapshot DeleteCriticalSection DuplicateHandle EnterCriticalSection FormatMessageA GetCommandLineW GetCurrentProcess GetCurrentProcessId GetCurrentThread GetCurrentThreadId GetHandleInformation GetLastError GetModuleHandleA GetProcAddress GetProcessAffinityMask GetStartupInfoA GetSystemTimeAsFileTime GetThreadContext GetThreadPriority GetTickCount InitializeCriticalSection IsDebuggerPresent IsProcessorFeaturePresent LeaveCriticalSection LoadLibraryA LocalFree OpenProcess OutputDebugStringA PeekNamedPipe Process32FirstW Process32NextW QueryPerformanceCounter QueryPerformanceFrequency RaiseException ReadFile ReleaseSemaphore ResetEvent ResumeThread RtlCaptureContext RtlLookupFunctionEntry RtlUnwindEx RtlVirtualUnwind SetEvent SetLastError SetNamedPipeHandleState SetProcessAffinityMask SetThreadContext SetThreadPriority SetUnhandledExceptionFilter Sleep SuspendThread TerminateProcess TlsAlloc TlsGetValue TlsSetValue TryEnterCriticalSection VirtualProtect VirtualQuery VirtualQueryEx WaitForMultipleObjects WaitForSingleObject WaitNamedPipeA WideCharToMultiByte WriteFile lstrcmpW

api-ms-win-crt-convert-l1-1-0

mbrtowc mbsrtowcs strtoul wcrtomb

api-ms-win-crt-environment-l1-1-0

__p__environ getenv

api-ms-win-crt-heap-l1-1-0

_set_new_mode calloc free malloc realloc

api-ms-win-crt-locale-l1-1-0

_configthreadlocale localeconv

api-ms-win-crt-math-l1-1-0

__setusermatherr

api-ms-win-crt-multibyte-l1-1-0

_ismbblead

api-ms-win-crt-private-l1-1-0

__C_specific_handler __intrinsic_setjmpex longjmp memchr memcmp memcpy memmove strchr

api-ms-win-crt-runtime-l1-1-0

__p___argc __p___argv __p__acmdln _assert _beginthreadex _cexit _configure_narrow_argv _crt_atexit _endthreadex _errno _exit _initialize_narrow_environment _set_app_type _initterm _initterm_e _set_invalid_parameter_handler abort exit signal strerror

api-ms-win-crt-stdio-l1-1-0

__acrt_iob_func __p__commode __p__fmode __stdio_common_vfprintf __stdio_common_vsprintf __stdio_common_vsprintf_s _read _write fputc fputs fwrite

api-ms-win-crt-string-l1-1-0

_strdup memset strcmp strlen strncmp strnlen wcslen wcsnlen

api-ms-win-crt-utility-l1-1-0

rand_s

shell32

CommandLineToArgvW

Name

.text

Size

175KB

Virtual Size

175KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.data

Size

1KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rdata

Size

26KB

Virtual Size

25KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.pdata

Size

12KB

Virtual Size

11KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.xdata

Size

10KB

Virtual Size

9KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.bss

Size

Virtual Size

3KB

Characteristics

IMAGE_SCN_CNT_UNINITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.idata

Size

6KB

Virtual Size

5KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.tls

Size

512B

Virtual Size

16B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

1KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

1KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

Size

2KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/19

Size

76KB

Virtual Size

75KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/31

Size

14KB

Virtual Size

14KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/45

Size

29KB

Virtual Size

28KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/57

Size

5KB

Virtual Size

5KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/70

Size

1024B

Virtual Size

899B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/81

Size

9KB

Virtual Size

9KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/97

Size

31KB

Virtual Size

31KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/113

Size

1KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

File Explorer

2026-05-03_e2230f8c0811a69186ac450fa12ac9cb_conti

advapi32

kernel32

api-ms-win-crt-convert-l1-1-0

api-ms-win-crt-environment-l1-1-0

api-ms-win-crt-heap-l1-1-0

api-ms-win-crt-locale-l1-1-0

api-ms-win-crt-math-l1-1-0

api-ms-win-crt-multibyte-l1-1-0

api-ms-win-crt-private-l1-1-0

api-ms-win-crt-runtime-l1-1-0

api-ms-win-crt-stdio-l1-1-0

api-ms-win-crt-string-l1-1-0

api-ms-win-crt-utility-l1-1-0

shell32

generic