guloader[.]exe

Sharing

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General

Target

guloader.exe
Size

104KB
MD5

1b956c755728862561f9aa53b7d2f133
SHA1

b2dc79b9e05b90b1d64e58c5e3c689df0519d728
SHA256

788dc4da51d81894d6263d1afd44f3cea4bba293b89d59006f756c8a9b007ed0
SHA512

6013e2ff6a74b5f82c666f6dbb4a031eecc64977f34b67c9175b68e55982a85ef3be59aa353197caf918bd676cc5a96907dbc09ef46a17bc31af992d1c7139b0
SSDEEP

3072:os+LplNxNXz3lxRXJWfHATsfCufKOV2GFKh+Xv7T:osKxNX1AP5/yCKwXvP

Score

1^/10

Malware Config

Signatures

NSIS installer 2 IoCs

installer

resource	yara_rule
sample	nsis_installer_1
sample	nsis_installer_2

Files

guloader.exe
.exe windows x86

e160ef8e55bb9d162da4e266afd9eef3

Code Sign

11:29:8f:9e:f9:af:e1:29
Certificate

Issuer

OU=rearrangeredes Cabriolet\ ,O=Osmotactic,L=Ars-les-Favets,ST=Auvergne-Rhône-Alpes,C=FR,1.2.840.113549.1.9.1=#0c0c447540436c61726b732e4166

Not Before

26/02/2022, 01:30

Not After

25/02/2025, 01:30

Subject

OU=rearrangeredes Cabriolet\ ,O=Osmotactic,L=Ars-les-Favets,ST=Auvergne-Rhône-Alpes,C=FR,1.2.840.113549.1.9.1=#0c0c447540436c61726b732e4166

03:cb:34:fd:3d:ff:12:11:33:9f:f0:7c:4b:21:57:c7
Certificate

Issuer

CN=DigiCert Trusted G4 RSA4096 SHA256 TimeStamping CA,O=DigiCert\, Inc.,C=US

Not Before

30/08/2022, 00:00

Not After

29/08/2023, 23:59

Subject

CN=DigiCert Timestamp 2022 - 2,O=DigiCert,C=US

Extended Key Usages

ExtKeyUsageTimeStamping

Key Usages

KeyUsageDigitalSignature

07:36:37:b7:24:54:7c:d8:47:ac:fd:28:66:2a:5e:5b
Certificate

Issuer

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Not Before

23/03/2022, 00:00

Not After

22/03/2037, 23:59

Subject

CN=DigiCert Trusted G4 RSA4096 SHA256 TimeStamping CA,O=DigiCert\, Inc.,C=US

Extended Key Usages

ExtKeyUsageTimeStamping

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

0e:9b:18:8e:f9:d0:2d:e7:ef:db:50:e2:08:40:18:5a
Certificate

Issuer

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Not Before

01/08/2022, 00:00

Not After

09/11/2031, 23:59

Subject

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

fe:53:80:ba:dc:b8:d2:55:46:f8:97:c7:6e:20:70:f1:ca:88:84:ff:49:5a:14:d2:56:37:48:14:ee:ea:5c:32
Signer

Actual PE Digest

fe:53:80:ba:dc:b8:d2:55:46:f8:97:c7:6e:20:70:f1:ca:88:84:ff:49:5a:14:d2:56:37:48:14:ee:ea:5c:32

Digest Algorithm

sha256

PE Digest Matches

true

Signature Validations

Trusted

false

Verification

Signing Certificate

OU=rearrangeredes Cabriolet\ ,O=Osmotactic,L=Ars-les-Favets,ST=Auvergne-Rhône-Alpes,C=FR,1.2.840.113549.1.9.1=#0c0c447540436c61726b732e4166

19/09/2022, 07:21
Valid: false

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
GetFileSize
GetModuleFileNameA
GetCurrentProcess
CopyFileA
ExitProcess
SetEnvironmentVariableA
GetWindowsDirectoryA
GetTempPathA
Sleep
CloseHandle
LoadLibraryA
lstrlenA
lstrcpynA
GetDiskFreeSpaceA
GlobalUnlock
GlobalLock
CreateThread
CreateProcessA
RemoveDirectoryA
CreateFileA
GetTempFileNameA
ReadFile
lstrcpyA
lstrcatA
GetSystemDirectoryA
GetVersion
GetProcAddress
GlobalAlloc
CompareFileTime
SetFileTime
ExpandEnvironmentStringsA
lstrcmpiA
lstrcmpA
WaitForSingleObject
GlobalFree
GetExitCodeProcess
GetModuleHandleA
SetErrorMode
GetCommandLineA
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: 3.6MB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.ndata
Size: - Virtual size: 80KB

IMAGE_SCN_CNT_UNINITIALIZED_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

Signatures

Files

e160ef8e55bb9d162da4e266afd9eef3

Code Sign

11:29:8f:9e:f9:af:e1:29Certificate

03:cb:34:fd:3d:ff:12:11:33:9f:f0:7c:4b:21:57:c7Certificate

Extended Key Usages

Key Usages

07:36:37:b7:24:54:7c:d8:47:ac:fd:28:66:2a:5e:5bCertificate

Extended Key Usages

Key Usages

0e:9b:18:8e:f9:d0:2d:e7:ef:db:50:e2:08:40:18:5aCertificate

Key Usages

fe:53:80:ba:dc:b8:d2:55:46:f8:97:c7:6e:20:70:f1:ca:88:84:ff:49:5a:14:d2:56:37:48:14:ee:ea:5c:32Signer

Signature Validations

Verification

19/09/2022, 07:21 Valid: false

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: 3.6MB

.ndata Size: - Virtual size: 80KB

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

11:29:8f:9e:f9:af:e1:29
Certificate

03:cb:34:fd:3d:ff:12:11:33:9f:f0:7c:4b:21:57:c7
Certificate

07:36:37:b7:24:54:7c:d8:47:ac:fd:28:66:2a:5e:5b
Certificate

0e:9b:18:8e:f9:d0:2d:e7:ef:db:50:e2:08:40:18:5a
Certificate

fe:53:80:ba:dc:b8:d2:55:46:f8:97:c7:6e:20:70:f1:ca:88:84:ff:49:5a:14:d2:56:37:48:14:ee:ea:5c:32
Signer

19/09/2022, 07:21
Valid: false

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

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

.data
Size: 1024B - Virtual size: 3.6MB

.ndata
Size: - Virtual size: 80KB

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