remcos | Backdoor[.]exe

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General

Target

Backdoor.exe
Size

92KB
MD5

1ae56ec879a82b9d0b34637cdbb498ef
SHA1

523c2d5e3864c0be7593f7cb8d3cc5ef8391eba0
SHA256

5abf99b5cb761cf5e1b14a3cf9f0edfff6b932592772aa422e2d1a691fe25432
SHA512

4a5d836330d0e3a8451a83b31c9b122f6b0aff27a58ea97f8a07bb9dc22c19835b80e5588957551da645e5c7299193e32945287e709dd8579d30ec89fdb27bf7
SSDEEP

1536:ohhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6XrE:uhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+D

Score

10^/10

host remcos

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

185.254.97.15:2404

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%SystemDrive%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
remcos_rukbdcxfoo
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos family
remcos
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.

Processes:

resource

Backdoor.exe

resource
Backdoor.exe

Files

Backdoor.exe
.exe windows:4 windows x86 arch:x86

d3a62971944197f0701c7049a9c739d1

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

kernel32

GetModuleFileNameA
GetLongPathNameA
CreateMutexA
OpenMutexA
Process32Next
Process32First
CreateToolhelp32Snapshot
SizeofResource
LockResource
LoadResource
FindResourceA
GetLocaleInfoA
Process32NextW
Process32FirstW
lstrlenA
GetDriveTypeA
CreateProcessA
GetTickCount
GlobalUnlock
GlobalLock
GlobalAlloc
WinExec
GetCurrentProcessId
CreateDirectoryW
CopyFileA
GetFileAttributesW
GetLogicalDriveStringsA
GetCurrentProcess
ResumeThread
SetThreadContext
WriteProcessMemory
VirtualAllocEx
ReadProcessMemory
GetThreadContext
VirtualAlloc
GlobalFree
LocalAlloc
TerminateProcess
ReadFile
PeekNamedPipe
GetStdHandle
CreatePipe
OpenProcess
DuplicateHandle
GetCurrentThread
lstrcpynA
ExitProcess
AllocConsole
GetStartupInfoA
ExpandEnvironmentStringsA
FindFirstFileA
FindNextFileA
GetLastError
LoadLibraryA
GetProcAddress
CreateFileMappingA
MapViewOfFileEx
DeleteFileA
RemoveDirectoryA
CloseHandle
GetFileAttributesA
SetFileAttributesA
SetEvent
TerminateThread
FindFirstFileW
FindNextFileW
FindClose
GetLocalTime
CreateEventA
WaitForSingleObject
CreateDirectoryA
ExitThread
Sleep
GetModuleHandleA
DeleteFileW
CreateThread

user32

GetWindowTextLengthA
GetForegroundWindow
UnhookWindowsHookEx
CloseClipboard
GetClipboardData
OpenClipboard
SetClipboardData
EmptyClipboard
ExitWindowsEx
MessageBoxA
GetKeyboardLayoutNameA
GetWindowThreadProcessId
ShowWindow
CloseWindow
GetWindowTextA
GetWindowTextW
EnumWindows
SendInput
CreateWindowExA
RegisterClassExA
AppendMenuA
CreatePopupMenu
TrackPopupMenu
SetForegroundWindow
GetCursorPos
DefWindowProcA
GetKeyState
CallNextHookEx
SetWindowsHookExA
GetMessageA
TranslateMessage
GetKeyboardLayout
FindWindowA
DispatchMessageA
IsWindowVisible

gdi32

CreateDCA
CreateCompatibleDC
GetDeviceCaps
CreateCompatibleBitmap
SelectObject
StretchBlt
GetObjectA
GetDIBits
DeleteObject
DeleteDC

advapi32

OpenProcessToken
LookupPrivilegeValueA
AdjustTokenPrivileges
RegCreateKeyExA
RegQueryInfoKeyA
RegEnumKeyExA
RegEnumValueA
RegDeleteValueA
RegCreateKeyA
RegSetValueExA
RegOpenKeyExA
RegDeleteKeyA
RegCloseKey
RegQueryValueExA
GetUserNameW

shell32

ShellExecuteA
ExtractIconA
Shell_NotifyIconA
ShellExecuteExA
ShellExecuteW

msvcp60

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?replace@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV12@IIPBD@Z
??8std@@YA_NPBDABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@0@@Z
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?find_last_of@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEIDI@Z
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?npos@?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@2IB
?find@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEIPBDII@Z
??0Init@ios_base@std@@QAE@XZ
??1Init@ios_base@std@@QAE@XZ
??0_Winit@std@@QAE@XZ
??1_Winit@std@@QAE@XZ
?find@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEIABV12@I@Z
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?rfind@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEIDI@Z
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??Bios_base@std@@QBEPAXXZ
?assign@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV12@PBDI@Z
??6std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@PBD@Z
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?is_open@?$basic_ofstream@DU?$char_traits@D@std@@@std@@QBE_NXZ
?data@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEPBDXZ
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??0logic_error@std@@QAE@ABV01@@Z
??0out_of_range@std@@QAE@ABV01@@Z
??1out_of_range@std@@UAE@XZ
??0out_of_range@std@@QAE@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@1@@Z
??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@PBDABV?$allocator@D@1@@Z
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?c_str@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEPBDXZ
?resize@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEXI@Z
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??_D?$basic_fstream@DU?$char_traits@D@std@@@std@@QAEXXZ
?close@?$basic_fstream@DU?$char_traits@D@std@@@std@@QAEXXZ
?write@?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV12@PBDH@Z
?seekp@?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV12@JW4seekdir@ios_base@2@@Z
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?size@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEIXZ
??Y?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV01@ABV01@@Z
?substr@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBE?AV12@II@Z
?npos@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@2IB
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??_D?$basic_ifstream@DU?$char_traits@D@std@@@std@@QAEXXZ
?close@?$basic_ifstream@DU?$char_traits@D@std@@@std@@QAEXXZ
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?seekg@?$basic_istream@DU?$char_traits@D@std@@@std@@QAEAAV12@JW4seekdir@ios_base@2@@Z
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?is_open@?$basic_ifstream@DU?$char_traits@D@std@@@std@@QBE_NXZ
??0?$basic_ifstream@DU?$char_traits@D@std@@@std@@QAE@PBDH@Z
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msvcrt

_wrename
_controlfp
__set_app_type
__p__fmode
__p__commode
_adjust_fdiv
__setusermatherr
_initterm
__getmainargs
_acmdln
_XcptFilter
_exit
_onexit
__dllonexit
??1type_info@@UAE@XZ
_iob
freopen
srand
rand
mbstowcs
realloc
_itoa
sprintf
getenv
toupper
tolower
wcscmp
printf
strncmp
malloc
free
_EH_prolog
__CxxFrameHandler
time
localtime
strftime
puts
atoi
_ftol
??2@YAPAXI@Z
_except_handler3
exit
??0exception@@QAE@ABV0@@Z
_CxxThrowException

winmm

waveInOpen
waveInStop
waveInClose
waveInAddBuffer
waveInPrepareHeader
waveInUnprepareHeader
waveInStart

shlwapi

PathFileExistsA

ws2_32

htons
gethostbyname
closesocket
socket
send
WSAGetLastError
connect
recv
WSAStartup

urlmon

URLDownloadToFileA

gdiplus

GdipLoadImageFromStreamICM
GdipDisposeImage
GdipCloneImage
GdipAlloc
GdipSaveImageToStream
GdipSaveImageToFile
GdipLoadImageFromStream
GdiplusStartup
GdipGetImageEncoders
GdipFree
GdipGetImageEncodersSize

wininet

InternetCloseHandle
InternetOpenUrlA
InternetOpenA
InternetReadFile

Sections

.text
Size: 60KB - Virtual size: 59KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 20KB - Virtual size: 18KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Extracted

Signatures

Files

d3a62971944197f0701c7049a9c739d1

Headers

File Characteristics

Imports

kernel32

user32

gdi32

advapi32

shell32

msvcp60

msvcrt

winmm

shlwapi

ws2_32

urlmon

gdiplus

wininet

Sections

.text Size: 60KB - Virtual size: 59KB

.rdata Size: 20KB - Virtual size: 18KB

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

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

.text
Size: 60KB - Virtual size: 59KB

.rdata
Size: 20KB - Virtual size: 18KB

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

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