2024-04-25_4809e720204c4f759a84584a073e50f6_avoslocker

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General

Target

2024-04-25_4809e720204c4f759a84584a073e50f6_avoslocker
Size

18.8MB
MD5

4809e720204c4f759a84584a073e50f6
SHA1

8a289278af3b320693612cd2ca19636c04a05e3e
SHA256

a93901fbfbcd41a04051505d333706030c55829d33ab8a4ab1b61d830d261239
SHA512

50993323eeea9ee780683b1e4a58db6e54970e0bf511f64a24aabc0b5bdc8f4d8ac69cc6036b06878f8d7aa172473939a246e4491995c3386f93333c8ea25ef2
SSDEEP

393216:aagMuDePi5xj/29pcL3Ela1d1l23RfO43H:Kqi5x69A3EuARO4X

Score

10^/10

Malware Config

Signatures

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
sample	UPX

Files

2024-04-25_4809e720204c4f759a84584a073e50f6_avoslocker
.exe windows:6 windows x86 arch:x86

f4cdc1e78db609ed62acc4abd4d468cf

Code Sign

08:ad:40:b2:60:d2:9c:4c:9f:5e:cd:a9:bd:93:ae:d9
Certificate

Issuer

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

Not Before

29/04/2021, 00:00

Not After

28/04/2036, 23:59

Subject

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

06:ee:60:44:c6:ce:ac:37:59:20:ab:82:d3:4f:f7:4f
Certificate

Issuer

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US

Not Before

09/11/2022, 00:00

Not After

09/11/2023, 23:59

Subject

CN=Master Remote Sistemas Ltda,O=Master Remote Sistemas Ltda,L=São José do Rio Preto,ST=São Paulo,C=BR

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature

05:44:af:f3:94:9d:08:39:a6:bf:db:3f:5f:e5:61:16
Certificate

Issuer

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

Not Before

14/07/2023, 00:00

Not After

13/10/2034, 23:59

Subject

CN=DigiCert Timestamp 2023,O=DigiCert\, Inc.,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

Signer

Actual PE Digest

Digest Algorithm

PE Digest Matches

false

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE

Imports

winmm

timeBeginPeriod

wininet

InternetCloseHandle
InternetReadFile
InternetConnectW
InternetOpenW
InternetOpenUrlW

winspool.drv

DocumentPropertiesW
ClosePrinter
OpenPrinterW
GetDefaultPrinterW
EnumPrintersW

comctl32

ImageList_GetImageInfo
FlatSB_SetScrollInfo
InitCommonControls
ImageList_DragMove
ImageList_Destroy
_TrackMouseEvent
ImageList_DragShowNolock
ImageList_Add
FlatSB_SetScrollProp
ImageList_GetDragImage
ImageList_Create
ImageList_EndDrag
ImageList_DrawEx
ImageList_SetImageCount
FlatSB_GetScrollPos
FlatSB_SetScrollPos
InitializeFlatSB
ImageList_Copy
FlatSB_GetScrollInfo
ImageList_Write
ImageList_DrawIndirect
ImageList_SetBkColor
ImageList_GetBkColor
ImageList_BeginDrag
ImageList_GetIcon
ImageList_Replace
ImageList_GetImageCount
ImageList_DragEnter
ImageList_GetIconSize
ImageList_SetIconSize
ImageList_Read
ImageList_DragLeave
ImageList_LoadImageW
ImageList_Draw
ImageList_Remove
ImageList_ReplaceIcon
ImageList_SetOverlayImage

shell32

Shell_NotifyIconW
SHAppBarMessage
ShellExecuteW
ShellExecuteExW

user32

CopyImage
CreateWindowExW
GetMenuItemInfoW
SetMenuItemInfoW
DefFrameProcW
GetDCEx
PeekMessageW
MonitorFromWindow
GetDlgCtrlID
GetUpdateRect
SetTimer
WindowFromPoint
BeginPaint
RegisterClipboardFormatW
FrameRect
MapVirtualKeyW
IsWindowUnicode
RegisterWindowMessageW
FillRect
GetMenuStringW
DispatchMessageW
CreateAcceleratorTableW
SendMessageA
DefMDIChildProcW
EnumWindows
GetClassInfoW
ShowOwnedPopups
GetSystemMenu
GetScrollRange
GetScrollPos
SetScrollPos
GetActiveWindow
SetActiveWindow
DrawEdge
GetKeyboardLayoutList
LoadBitmapW
DrawFocusRect
EnumChildWindows
GetScrollBarInfo
SendInput
ReleaseCapture
UnhookWindowsHookEx
LoadCursorW
GetCapture
SetCapture
CreatePopupMenu
ScrollWindow
ShowCaret
GetMenuItemID
GetLastActivePopup
CharLowerBuffW
GetSystemMetrics
SetWindowLongW
PostMessageW
DrawMenuBar
SetParent
IsZoomed
CharUpperBuffW
GetClientRect
IsChild
ClientToScreen
GetClipboardData
SetClipboardData
SetWindowPlacement
IsIconic
CallNextHookEx
GetMonitorInfoW
ShowWindow
CheckMenuItem
CharUpperW
DefWindowProcW
GetForegroundWindow
SetForegroundWindow
GetWindowTextW
EnableWindow
DestroyWindow
IsDialogMessageW
EndMenu
RegisterClassW
CharNextW
GetWindowThreadProcessId
RedrawWindow
GetDC
GetFocus
SetFocus
EndPaint
ReleaseDC
MsgWaitForMultipleObjectsEx
LoadKeyboardLayoutW
GetClassLongW
ActivateKeyboardLayout
GetParent
DrawTextW
SetScrollRange
MonitorFromRect
InsertMenuItemW
PeekMessageA
GetPropW
SetClassLongW
MessageBoxW
MessageBeep
SetPropW
UpdateWindow
RemovePropW
AttachThreadInput
GetSubMenu
MsgWaitForMultipleObjects
DestroyMenu
DestroyIcon
SetWindowsHookExW
EmptyClipboard
IsWindowVisible
DispatchMessageA
UnregisterClassW
GetTopWindow
SendMessageW
AdjustWindowRectEx
DrawIcon
IsWindow
EnumThreadWindows
InvalidateRect
GetKeyboardState
DrawFrameControl
ScreenToClient
SendMessageTimeoutW
BringWindowToTop
SetCursor
CreateIcon
CreateMenu
LoadStringW
CharLowerW
SetWindowPos
SetWindowRgn
GetMenuItemCount
RemoveMenu
GetSysColorBrush
GetKeyboardLayoutNameW
GetWindowDC
TranslateMessage
OpenClipboard
DrawTextExW
MapWindowPoints
EnumDisplayMonitors
CallWindowProcW
CloseClipboard
DestroyCursor
GetScrollInfo
SetWindowTextW
GetMessageExtraInfo
EnableScrollBar
GetSysColor
TrackPopupMenu
CopyIcon
DrawIconEx
PostQuitMessage
GetClassNameW
ShowScrollBar
EnableMenuItem
GetIconInfo
GetMessagePos
SetScrollInfo
GetKeyNameTextW
GetDesktopWindow
GetCursorPos
SetCursorPos
HideCaret
GetMenu
GetMenuState
SetMenu
SetRect
GetKeyState
FindWindowExW
MonitorFromPoint
ValidateRect
SystemParametersInfoW
LoadIconW
GetCursor
GetWindow
GetWindowLongW
GetWindowRect
InsertMenuW
KillTimer
WaitMessage
IsWindowEnabled
IsDialogMessageA
TranslateMDISysAccel
GetWindowPlacement
CreateIconIndirect
FindWindowW
DeleteMenu
GetKeyboardLayout

version

GetFileVersionInfoSizeW
VerQueryValueW
GetFileVersionInfoW

oleaut32

SysFreeString
VariantClear
VariantInit
GetErrorInfo
SysReAllocStringLen
SafeArrayCreate
SysAllocStringLen
SafeArrayPtrOfIndex
SafeArrayGetUBound
SafeArrayGetLBound
VariantCopy
VariantChangeType

advapi32

CloseServiceHandle
RegSetValueExW
OpenServiceW
ControlService
RegConnectRegistryW
RegEnumKeyExW
RegLoadKeyW
QueryServiceStatus
RegDeleteKeyW
OpenSCManagerW
RegOpenKeyExW
RegQueryInfoKeyW
RegUnLoadKeyW
RegSaveKeyW
DeleteService
RegDeleteValueW
RegReplaceKeyW
RegFlushKey
RegQueryValueExW
RegEnumValueW
RegCloseKey
RegCreateKeyExW
RegRestoreKeyW

msvcrt

memcpy
memset

kernel32

GetFileType
GetACP
CloseHandle
LocalFree
GetCurrentProcessId
SizeofResource
VirtualProtect
QueryPerformanceFrequency
IsDebuggerPresent
GetFullPathNameW
VirtualFree
GetProcessHeap
ExitProcess
HeapAlloc
GetCPInfoExW
RtlUnwind
GetCPInfo
EnumSystemLocalesW
GetStdHandle
GetModuleHandleW
FreeLibrary
TryEnterCriticalSection
HeapDestroy
ReadFile
GetLastError
GetModuleFileNameW
SetLastError
GlobalAlloc
GlobalUnlock
FindResourceW
CreateThread
CompareStringW
LoadLibraryA
ResetEvent
MulDiv
FreeResource
GetVersion
RaiseException
GlobalAddAtomW
FormatMessageW
OpenProcess
SwitchToThread
GetExitCodeThread
OutputDebugStringW
GetCurrentThread
LoadLibraryExW
TerminateProcess
LockResource
GetCurrentThreadId
UnhandledExceptionFilter
VirtualQuery
GlobalFindAtomW
VirtualQueryEx
GlobalFree
Sleep
EnterCriticalSection
SetFilePointer
LoadResource
SuspendThread
GetTickCount
GetFileSize
GetStartupInfoW
GlobalDeleteAtom
GetFileAttributesW
InitializeCriticalSection
GetThreadPriority
GetCurrentProcess
SetThreadPriority
GlobalLock
VirtualAlloc
GetCommandLineW
GetSystemInfo
LeaveCriticalSection
GetProcAddress
ResumeThread
GetVersionExW
VerifyVersionInfoW
HeapCreate
LCMapStringW
GetDiskFreeSpaceW
VerSetConditionMask
FindFirstFileW
GetUserDefaultUILanguage
GetConsoleOutputCP
GetConsoleCP
lstrlenW
QueryPerformanceCounter
SetEndOfFile
HeapFree
WideCharToMultiByte
FindClose
MultiByteToWideChar
LoadLibraryW
SetEvent
GetLocaleInfoW
CreateFileW
EnumResourceNamesW
DeleteFileW
IsDBCSLeadByteEx
GetEnvironmentVariableW
GetLocalTime
WaitForSingleObject
WriteFile
ExitThread
DeleteCriticalSection
GetDateFormatW
TlsGetValue
SetErrorMode
GetComputerNameW
IsValidLocale
TlsSetValue
CreateDirectoryW
GetSystemDefaultUILanguage
EnumCalendarInfoW
LocalAlloc
RemoveDirectoryW
CreateEventW
WaitForMultipleObjectsEx
GetThreadLocale
SetThreadLocale

ole32

IsEqualGUID
OleInitialize
OleUninitialize
CoInitialize
CoCreateInstance
CoUninitialize
CoTaskMemFree
CoTaskMemAlloc
StringFromCLSID

gdi32

Pie
SetBkMode
CreateCompatibleBitmap
GetEnhMetaFileHeader
RectVisible
AngleArc
ResizePalette
SetAbortProc
SetTextColor
StretchBlt
RoundRect
RestoreDC
SetRectRgn
GetTextMetricsW
GetWindowOrgEx
CreatePalette
PolyBezierTo
CreateICW
CreateDCW
GetStockObject
CreateSolidBrush
Polygon
MoveToEx
PlayEnhMetaFile
Ellipse
StartPage
GetBitmapBits
StartDocW
AbortDoc
GetSystemPaletteEntries
GetEnhMetaFileBits
GetEnhMetaFilePaletteEntries
CreatePenIndirect
CreateFontIndirectW
PolyBezier
EndDoc
GetObjectW
GetWinMetaFileBits
SetROP2
GetEnhMetaFileDescriptionW
ArcTo
Arc
SelectPalette
ExcludeClipRect
MaskBlt
SetWindowOrgEx
EndPage
DeleteEnhMetaFile
Chord
SetDIBits
SetViewportOrgEx
CreateRectRgn
RealizePalette
SetDIBColorTable
GetDIBColorTable
CreateBrushIndirect
PatBlt
SetEnhMetaFileBits
Rectangle
SaveDC
DeleteDC
FrameRgn
BitBlt
GetDeviceCaps
GetTextExtentPoint32W
GetClipBox
IntersectClipRect
Polyline
CreateBitmap
SetWinMetaFileBits
GetStretchBltMode
CreateDIBitmap
SetStretchBltMode
GetDIBits
CreateDIBSection
LineTo
GetRgnBox
EnumFontsW
CreateHalftonePalette
SelectObject
DeleteObject
ExtFloodFill
UnrealizeObject
CopyEnhMetaFileW
SetBkColor
CreateCompatibleDC
GetBrushOrgEx
GetCurrentPositionEx
GetNearestPaletteIndex
GetTextExtentPointW
ExtTextOutW
SetBrushOrgEx
GetPixel
GdiFlush
SetPixel
EnumFontFamiliesExW
StretchDIBits
GetPaletteEntries

Exports

Exports

__dbk_fcall_wrapper
dbkFCallWrapperAddr

Sections

.text
Size: 2.1MB - Virtual size: 2.1MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 38KB - Virtual size: 38KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.bss
Size: - Virtual size: 159KB

IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 13KB - Virtual size: 13KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.edata
Size: 512B - Virtual size: 127B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.tls
Size: - Virtual size: 84B

IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rdata
Size: 512B - Virtual size: 93B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 182KB - Virtual size: 181KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

.rsrc
Size: 16.5MB - Virtual size: 16.5MB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

f4cdc1e78db609ed62acc4abd4d468cf

Code Sign

08:ad:40:b2:60:d2:9c:4c:9f:5e:cd:a9:bd:93:ae:d9Certificate

Extended Key Usages

Key Usages

06:ee:60:44:c6:ce:ac:37:59:20:ab:82:d3:4f:f7:4fCertificate

Extended Key Usages

Key Usages

05:44:af:f3:94:9d:08:39:a6:bf:db:3f:5f:e5:61:16Certificate

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

Signer

Headers

DLL Characteristics

File Characteristics

Imports

winmm

wininet

winspool.drv

comctl32

shell32

user32

version

oleaut32

advapi32

msvcrt

kernel32

ole32

gdi32

Exports

Exports

Sections

.text Size: 2.1MB - Virtual size: 2.1MB

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

.data Size: 38KB - Virtual size: 38KB

.bss Size: - Virtual size: 159KB

.idata Size: 13KB - Virtual size: 13KB

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

.edata Size: 512B - Virtual size: 127B

.tls Size: - Virtual size: 84B

.rdata Size: 512B - Virtual size: 93B

.reloc Size: 182KB - Virtual size: 181KB

.rsrc Size: 16.5MB - Virtual size: 16.5MB

08:ad:40:b2:60:d2:9c:4c:9f:5e:cd:a9:bd:93:ae:d9
Certificate

06:ee:60:44:c6:ce:ac:37:59:20:ab:82:d3:4f:f7:4f
Certificate

05:44:af:f3:94:9d:08:39:a6:bf:db:3f:5f:e5:61:16
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

.text
Size: 2.1MB - Virtual size: 2.1MB

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

.data
Size: 38KB - Virtual size: 38KB

.bss
Size: - Virtual size: 159KB

.idata
Size: 13KB - Virtual size: 13KB

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

.edata
Size: 512B - Virtual size: 127B

.tls
Size: - Virtual size: 84B

.rdata
Size: 512B - Virtual size: 93B

.reloc
Size: 182KB - Virtual size: 181KB

.rsrc
Size: 16.5MB - Virtual size: 16.5MB