omcuu[.]exe | Triage

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General

Target

omcuu.exe
Size

1.4MB
MD5

7aae3c2e5581394d5f1422da32e95fe7
SHA1

4c34deb1aa56ec16d7655392cade13fbeb4e3922
SHA256

0fad33af4aa32c3067e840724e1898e478bfe530c7d1f05a096f79af8120c861
SHA512

dd4ac257081c2bbba8ed2eedf4599492eb035d99f9fde3cad6feaaab10631d82d839ad7e20d5ea5272ba8d7fe74b2ca7db83d0fb92dd943c2b444c753717c77c
SSDEEP

24576:nQoFpItRUEuaEvDLGh4lz8NxHfh5Mxfc8CiF4H//0lF1b+/723dSCax/vk:9boOEdEv2hTHfh5Mxfc8Ocl3+723sH/s

Score

3^/10

Malware Config

Signatures

Unsigned PE 3 IoCs

Checks for missing Authenticode signature.

resource
omcuu.exe
unpack001/$PLUGINSDIR/System.dll
unpack001/sirrah.dll

NSIS installer 2 IoCs

installer

resource	yara_rule
sample	nsis_installer_1
sample	nsis_installer_2

Files

omcuu.exe
.exe windows:4 windows x86 arch:x86

59a4a44a250c4cf4f2d9de2b3fe5d95f

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

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

kernel32

GetTickCount
GetFullPathNameA
MoveFileA
SetCurrentDirectoryA
GetFileAttributesA
GetLastError
CreateDirectoryA
SetFileAttributesA
SearchPathA
GetShortPathNameA
CreateFileA
GetFileSize
GetModuleFileNameA
ReadFile
GetCurrentProcess
CopyFileA
ExitProcess
SetEnvironmentVariableA
Sleep
CloseHandle
GetCommandLineA
SetErrorMode
LoadLibraryA
lstrlenA
lstrcpynA
GetDiskFreeSpaceA
GlobalUnlock
GlobalLock
CreateThread
CreateProcessA
RemoveDirectoryA
GetTempFileNameA
lstrcpyA
lstrcatA
GetSystemDirectoryA
GetVersion
GetProcAddress
GlobalAlloc
CompareFileTime
SetFileTime
ExpandEnvironmentStringsA
lstrcmpiA
lstrcmpA
WaitForSingleObject
GlobalFree
GetExitCodeProcess
GetModuleHandleA
GetTempPathA
GetWindowsDirectoryA
LoadLibraryExA
FindFirstFileA
FindNextFileA
DeleteFileA
SetFilePointer
WriteFile
FindClose
WritePrivateProfileStringA
MultiByteToWideChar
MulDiv
GetPrivateProfileStringA
FreeLibrary

user32

CreateWindowExA
EndDialog
ScreenToClient
GetWindowRect
EnableMenuItem
GetSystemMenu
SetClassLongA
IsWindowEnabled
SetWindowPos
GetSysColor
GetWindowLongA
SetCursor
LoadCursorA
CheckDlgButton
GetMessagePos
LoadBitmapA
CallWindowProcA
IsWindowVisible
CloseClipboard
GetDC
SystemParametersInfoA
RegisterClassA
TrackPopupMenu
AppendMenuA
CreatePopupMenu
GetSystemMetrics
SetDlgItemTextA
GetDlgItemTextA
MessageBoxIndirectA
CharPrevA
DispatchMessageA
PeekMessageA
ReleaseDC
EnableWindow
InvalidateRect
SendMessageA
DefWindowProcA
BeginPaint
GetClientRect
FillRect
DrawTextA
GetClassInfoA
DialogBoxParamA
CharNextA
ExitWindowsEx
DestroyWindow
CreateDialogParamA
SetTimer
GetDlgItem
wsprintfA
SetForegroundWindow
ShowWindow
IsWindow
LoadImageA
SetWindowLongA
SetClipboardData
EmptyClipboard
OpenClipboard
EndPaint
PostQuitMessage
FindWindowExA
SendMessageTimeoutA
SetWindowTextA

gdi32

SelectObject
SetBkMode
CreateFontIndirectA
SetTextColor
DeleteObject
GetDeviceCaps
CreateBrushIndirect
SetBkColor

shell32

SHGetSpecialFolderLocation
SHGetPathFromIDListA
SHBrowseForFolderA
SHGetFileInfoA
ShellExecuteA
SHFileOperationA

advapi32

RegCloseKey
RegOpenKeyExA
RegDeleteKeyA
RegDeleteValueA
RegEnumValueA
RegCreateKeyExA
RegSetValueExA
RegQueryValueExA
RegEnumKeyA

comctl32

ImageList_Create
ImageList_AddMasked
ImageList_Destroy
ord17

ole32

CoCreateInstance
CoTaskMemFree
OleInitialize
OleUninitialize

version

GetFileVersionInfoSizeA
GetFileVersionInfoA
VerQueryValueA

Sections

.text
Size: 23KB - Virtual size: 22KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 4KB - Virtual size: 4KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 1024B - Virtual size: 105KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.ndata
Size: - Virtual size: 60KB

IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 17KB - Virtual size: 16KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
$PLUGINSDIR/System.dll
.dll windows:4 windows x86 arch:x86

8c8a576201f68de1a3f26fc723b9f30f

Headers

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL

Imports

kernel32

MultiByteToWideChar
GlobalFree
GlobalSize
lstrcpynA
lstrcpyA
GetProcAddress
VirtualFree
FreeLibrary
lstrlenA
LoadLibraryA
GetModuleHandleA
GlobalAlloc
WideCharToMultiByte
VirtualAlloc
VirtualProtect
GetLastError

user32

wsprintfA

ole32

StringFromGUID2
CLSIDFromString

Exports

Exports

Alloc
Call
Copy
Free
Get
Int64Op
Store
StrAlloc

Sections

.text
Size: 7KB - Virtual size: 7KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 1024B - Virtual size: 851B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 512B - Virtual size: 104B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.reloc
Size: 1024B - Virtual size: 610B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
IdolConservancyCapstan
sirrah.dll
.dll windows:4 windows x86 arch:x86

b220a9e5ed36bce52bfc06f885881cde

Headers

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL

Imports

kernel32

VirtualFree
GetCurrentThread
GetCurrentThreadId
GetCommandLineA
HeapFree
GetVersionExA
HeapAlloc
GetProcessHeap
GetProcAddress
GetModuleHandleA
ExitProcess
TlsGetValue
TlsAlloc
TlsSetValue
TlsFree
InterlockedIncrement
SetLastError
GetLastError
InterlockedDecrement
Sleep
SetHandleCount
GetStdHandle
GetFileType
GetStartupInfoA
DeleteCriticalSection
GetModuleFileNameA
FreeEnvironmentStringsA
GetEnvironmentStrings
FreeEnvironmentStringsW
WideCharToMultiByte
GetEnvironmentStringsW
HeapDestroy
HeapCreate
QueryPerformanceCounter
GetTickCount
GetCurrentProcessId
GetSystemTimeAsFileTime
WriteFile
LeaveCriticalSection
EnterCriticalSection
TerminateProcess
GetCurrentProcess
UnhandledExceptionFilter
SetUnhandledExceptionFilter
IsDebuggerPresent
LoadLibraryA
InitializeCriticalSection
GetCPInfo
GetACP
GetOEMCP
IsValidCodePage
VirtualAlloc
HeapReAlloc
RtlUnwind
HeapSize
MultiByteToWideChar
GetLocaleInfoA
GetStringTypeA
GetStringTypeW
LCMapStringA
LCMapStringW

Exports

Exports

Chimney

Sections

.text
Size: 32KB - Virtual size: 31KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 8KB - Virtual size: 6KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 4KB - Virtual size: 6KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.reloc
Size: 4KB - Virtual size: 3KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
support_female.png

Sharing

General

Malware Config

Signatures

Files

59a4a44a250c4cf4f2d9de2b3fe5d95f

Headers

DLL Characteristics

File Characteristics

Imports

kernel32

user32

gdi32

shell32

advapi32

comctl32

ole32

version

Sections

.text Size: 23KB - Virtual size: 22KB

.rdata Size: 4KB - Virtual size: 4KB

.data Size: 1024B - Virtual size: 105KB

.ndata Size: - Virtual size: 60KB

.rsrc Size: 17KB - Virtual size: 16KB

8c8a576201f68de1a3f26fc723b9f30f

Headers

File Characteristics

Imports

kernel32

user32

ole32

Exports

Exports

Sections

.text Size: 7KB - Virtual size: 7KB

.rdata Size: 1024B - Virtual size: 851B

.data Size: 512B - Virtual size: 104B

.reloc Size: 1024B - Virtual size: 610B

b220a9e5ed36bce52bfc06f885881cde

Headers

File Characteristics

Imports

kernel32

Exports

Exports

Sections

.text Size: 32KB - Virtual size: 31KB

.rdata Size: 8KB - Virtual size: 6KB

.data Size: 4KB - Virtual size: 6KB

.reloc Size: 4KB - Virtual size: 3KB

.text
Size: 23KB - Virtual size: 22KB

.rdata
Size: 4KB - Virtual size: 4KB

.data
Size: 1024B - Virtual size: 105KB

.ndata
Size: - Virtual size: 60KB

.rsrc
Size: 17KB - Virtual size: 16KB

.text
Size: 7KB - Virtual size: 7KB

.rdata
Size: 1024B - Virtual size: 851B

.data
Size: 512B - Virtual size: 104B

.reloc
Size: 1024B - Virtual size: 610B

.text
Size: 32KB - Virtual size: 31KB

.rdata
Size: 8KB - Virtual size: 6KB

.data
Size: 4KB - Virtual size: 6KB

.reloc
Size: 4KB - Virtual size: 3KB