colbact[.]dll | Triage

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General

Target

colbact.dll
Size

66KB
MD5

21684de4bab5d7490b7e1973e384810b
SHA1

72f986c686ff2966466dbd970e8605bb68f36436
SHA256

ced17c7c15a2e6a46ebea121e1eec0ceadbf48b7e374b6f3715e78819357c8bc
SHA512

bf08a8c27c05115d77e4897d8ebb3e024e9bf7493942ac3d8cc2a75861fe54d4e5a1476a9ef284401a27fe9e4283ce535df01387aabc7715da44942fe738c3cd
SSDEEP

1536:h26fKPsPw2j1xlgsTuakRkVpg7T8a5OcYVWtJhYOKSm8ztZZdfof:pTC3RkPg7TTELEJhYOrm8ztHdfI

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
colbact.dll

Files

colbact.dll
.dll regsvr32 windows:10 windows x86 arch:x86

8f94f81611dc3779b846132c63009a90

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL

PDB Paths

colbact.pdb

Imports

msvcrt

_ftol2
_local_unwind4
floor
memcmp
?terminate@@YAXXZ
time
rand
srand
wcsrchr
_waccess
_vsnwprintf
__CxxFrameHandler3
memcpy
_onexit
__dllonexit
_unlock
_lock
_except_handler4_common
_initterm
malloc
free
_amsg_exit
_XcptFilter
_wcsicmp
_CIfmod
memset

api-ms-win-core-registry-l1-1-0

RegCreateKeyExW
RegDeleteKeyExW
RegNotifyChangeKeyValue
RegQueryValueExW
RegOpenKeyExW
RegCloseKey
RegSetValueExW

api-ms-win-core-com-l1-1-0

CLSIDFromString
StringFromGUID2
CoCreateInstance
CoGetObjectContext
CoTaskMemFree
CoTaskMemAlloc

api-ms-win-core-libraryloader-l1-2-0

GetModuleFileNameW
LoadLibraryExW
LockResource
LoadResource
FreeLibrary
FindResourceExW
DisableThreadLibraryCalls
GetModuleHandleW
GetProcAddress
LoadStringW

api-ms-win-core-synch-l1-1-0

ReleaseMutex
SetEvent
DeleteCriticalSection
ReleaseSemaphore
OpenMutexW
InitializeCriticalSectionAndSpinCount
EnterCriticalSection
LeaveCriticalSection
InitializeCriticalSection
CreateEventW
WaitForSingleObject
CreateSemaphoreExW

rpcrt4

RpcStringFreeW
RpcRevertToSelf
RpcImpersonateClient
UuidToStringW

api-ms-win-core-processthreads-l1-1-0

GetExitCodeProcess
GetCurrentProcess
TlsFree
GetCurrentProcessId
GetCurrentThreadId
TerminateProcess
OpenThreadToken
SetThreadToken
TlsGetValue
TlsAlloc
CreateProcessW
GetCurrentThread
CreateThread
TlsSetValue
SetThreadStackGuarantee
OpenProcessToken

api-ms-win-core-debug-l1-1-0

DebugBreak
IsDebuggerPresent
OutputDebugStringA
OutputDebugStringW

api-ms-win-core-errorhandling-l1-1-0

UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetLastError

api-ms-win-core-handle-l1-1-0

CloseHandle

api-ms-win-core-sysinfo-l1-1-0

GetLocalTime
GetTickCount
GetSystemInfo
GetSystemTimeAsFileTime

api-ms-win-security-base-l1-1-0

DuplicateToken
FreeSid
GetLengthSid
GetTokenInformation
GetSidLengthRequired
AllocateAndInitializeSid
CopySid
EqualSid
IsValidSid
InitializeSid

api-ms-win-core-heap-l2-1-0

LocalAlloc
LocalFree

api-ms-win-core-synch-l1-2-0

Sleep

api-ms-win-core-profile-l1-1-0

QueryPerformanceCounter

ntdll

RtlAllocateHeap
RtlImageNtHeader
RtlFreeHeap

api-ms-win-core-file-l1-1-0

FindClose
CreateDirectoryW
FindFirstFileW
SetFileAttributesW
DeleteFileW
CompareFileTime
FindNextFileW

api-ms-win-core-processenvironment-l1-1-0

ExpandEnvironmentStringsW

api-ms-win-core-version-l1-1-0

VerQueryValueW

api-ms-win-core-localization-l1-2-0

FormatMessageW

api-ms-win-core-memory-l1-1-0

OpenFileMappingW
MapViewOfFile
VirtualAlloc
VirtualProtect
VirtualQuery

api-ms-win-core-delayload-l1-1-1

ResolveDelayLoadedAPI

api-ms-win-core-delayload-l1-1-0

DelayLoadFailureHook

Exports

Exports

DllGetClassObject
DllRegisterServer
DllUnregisterServer
GetClassInfoForCurrentUser
GetDefaultPartitionForCurrentUser
GetDefaultPartitionForSid
PartitionAccessCheck

Sections

.text
Size: 54KB - Virtual size: 54KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 512B - Virtual size: 8KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 5KB - Virtual size: 4KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.didat
Size: 512B - Virtual size: 76B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 1024B - Virtual size: 992B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 3KB - Virtual size: 3KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

8f94f81611dc3779b846132c63009a90

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

msvcrt

api-ms-win-core-registry-l1-1-0

api-ms-win-core-com-l1-1-0

api-ms-win-core-libraryloader-l1-2-0

api-ms-win-core-synch-l1-1-0

rpcrt4

api-ms-win-core-processthreads-l1-1-0

api-ms-win-core-debug-l1-1-0

api-ms-win-core-errorhandling-l1-1-0

api-ms-win-core-handle-l1-1-0

api-ms-win-core-sysinfo-l1-1-0

api-ms-win-security-base-l1-1-0

api-ms-win-core-heap-l2-1-0

api-ms-win-core-synch-l1-2-0

api-ms-win-core-profile-l1-1-0

ntdll

api-ms-win-core-file-l1-1-0

api-ms-win-core-processenvironment-l1-1-0

api-ms-win-core-version-l1-1-0

api-ms-win-core-localization-l1-2-0

api-ms-win-core-memory-l1-1-0

api-ms-win-core-delayload-l1-1-1

api-ms-win-core-delayload-l1-1-0

Exports

Exports

Sections

.text Size: 54KB - Virtual size: 54KB

.data Size: 512B - Virtual size: 8KB

.idata Size: 5KB - Virtual size: 4KB

.didat Size: 512B - Virtual size: 76B

.rsrc Size: 1024B - Virtual size: 992B

.reloc Size: 3KB - Virtual size: 3KB

.text
Size: 54KB - Virtual size: 54KB

.data
Size: 512B - Virtual size: 8KB

.idata
Size: 5KB - Virtual size: 4KB

.didat
Size: 512B - Virtual size: 76B

.rsrc
Size: 1024B - Virtual size: 992B

.reloc
Size: 3KB - Virtual size: 3KB