RCO[.]exe | Triage

Sharing

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General

Target

RCO.exe
Size

234KB
MD5

d35b1fb30138c2dd5f80599f749c28ae
SHA1

7694488d4dc5496d865f18649c686f4f9bf651aa
SHA256

70f16785980385ffda1e0cafe862043341f7a4902d24064d2d0d16fafc1dda14
SHA512

d41f628eddca90fa8180aec7e22b6130e19158c3af38c15b8098bc990d2c0cc4c5380d8825b1882f275b3baf801cc497ade276bf38f447f12178bc8dbb2d1854
SSDEEP

6144:VBlkZvaF4NTBn87zzALBp7VMfct/hSKUKq438e3hVv:VoSWNTFyzALPtt/Bj38e3hVv

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
RCO.exe

Files

RCO.exe
.exe windows:4 windows x86 arch:x86

2c5f2513605e48f2d8ea5440a870cb9e

Headers

File Characteristics

IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_32BIT_MACHINE

Imports

msvcrt

memset
wcsncmp
memmove
wcsncpy
wcsstr
_wcsnicmp
_wcsdup
free
_wcsicmp
wcslen
wcscpy
wcscmp
wcscat
memcpy
tolower
malloc

kernel32

GetModuleHandleW
HeapCreate
GetStdHandle
SetConsoleCtrlHandler
HeapDestroy
ExitProcess
WriteFile
GetTempFileNameW
LoadLibraryExW
EnumResourceTypesW
FreeLibrary
RemoveDirectoryW
EnumResourceNamesW
GetCommandLineW
LoadResource
SizeofResource
FreeResource
FindResourceW
GetNativeSystemInfo
GetShortPathNameW
GetWindowsDirectoryW
GetSystemDirectoryW
EnterCriticalSection
CloseHandle
LeaveCriticalSection
InitializeCriticalSection
WaitForSingleObject
TerminateThread
CreateThread
GetProcAddress
GetVersionExW
Sleep
WideCharToMultiByte
HeapAlloc
HeapFree
LoadLibraryW
GetCurrentProcessId
GetCurrentThreadId
GetModuleFileNameW
PeekNamedPipe
TerminateProcess
GetEnvironmentVariableW
SetEnvironmentVariableW
GetCurrentProcess
DuplicateHandle
CreatePipe
CreateProcessW
GetExitCodeProcess
SetUnhandledExceptionFilter
HeapSize
MultiByteToWideChar
CreateDirectoryW
SetFileAttributesW
GetTempPathW
DeleteFileW
GetCurrentDirectoryW
SetCurrentDirectoryW
CreateFileW
SetFilePointer
TlsFree
TlsGetValue
TlsSetValue
TlsAlloc
HeapReAlloc
DeleteCriticalSection
InterlockedCompareExchange
InterlockedExchange
GetLastError
SetLastError
UnregisterWait
GetCurrentThread
RegisterWaitForSingleObject

user32

CharUpperW
CharLowerW
MessageBoxW
DefWindowProcW
DestroyWindow
GetWindowLongW
GetWindowTextLengthW
GetWindowTextW
UnregisterClassW
LoadIconW
LoadCursorW
RegisterClassExW
IsWindowEnabled
EnableWindow
GetSystemMetrics
CreateWindowExW
SetWindowLongW
SendMessageW
SetFocus
CreateAcceleratorTableW
SetForegroundWindow
BringWindowToTop
GetMessageW
TranslateAcceleratorW
TranslateMessage
DispatchMessageW
DestroyAcceleratorTable
PostMessageW
GetForegroundWindow
GetWindowThreadProcessId
IsWindowVisible
EnumWindows
SetWindowPos

gdi32

GetStockObject

comctl32

InitCommonControlsEx

shell32

ShellExecuteExW
SHGetFolderLocation
SHGetPathFromIDListW

winmm

timeBeginPeriod

ole32

CoInitialize
CoTaskMemFree

shlwapi

PathAddBackslashW
PathRenameExtensionW
PathQuoteSpacesW
PathRemoveArgsW
PathRemoveBackslashW

Sections

.code
Size: 14KB - Virtual size: 14KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 13KB - Virtual size: 12KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 146KB - Virtual size: 146KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

2c5f2513605e48f2d8ea5440a870cb9e

Headers

File Characteristics

Imports

msvcrt

kernel32

user32

gdi32

comctl32

shell32

winmm

ole32

shlwapi

Sections

.code Size: 14KB - Virtual size: 14KB

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

.rdata Size: 13KB - Virtual size: 12KB

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

.rsrc Size: 146KB - Virtual size: 146KB

.code
Size: 14KB - Virtual size: 14KB

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

.rdata
Size: 13KB - Virtual size: 12KB

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

.rsrc
Size: 146KB - Virtual size: 146KB