Static task
static1
Behavioral task
behavioral1
Sample
Efterslttens.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
Efterslttens.exe
Resource
win10v2004-20230915-en
General
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Target
d0235bba7b76b67bba22769812e87571f2f638e9cce9c4715fb9b48664aff15e
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Size
422KB
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MD5
c8c66309b94fdcc4aba04a6116219bf0
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SHA1
aa1eeb8a084e5241d7ddeb27b5630dba2e89ae30
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SHA256
d0235bba7b76b67bba22769812e87571f2f638e9cce9c4715fb9b48664aff15e
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SHA512
1318412dd61901cde6a671f36aed1b4198e6ba82fe0bfbe97f8eb5d4221fd6ff7d30bc3da7af771b97eeb38d2667afbe4bfe8d9225099c35e4cb73d98bacd415
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SSDEEP
12288:b5Clt/7UB87ingga3V75qbXeMajqyDmOElJN+2Hy:4rbUgJSXeZD3Elny
Malware Config
Signatures
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NSIS installer 2 IoCs
resource yara_rule static1/unpack001/Efterslttens.exe nsis_installer_1 static1/unpack001/Efterslttens.exe nsis_installer_2
Files
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d0235bba7b76b67bba22769812e87571f2f638e9cce9c4715fb9b48664aff15e.rar
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Efterslttens.exe.exe windows:4 windows x86
3abe302b6d9a1256e6a915429af4ffd2
Code Sign
75:df:87:42:60:ab:4e:1c:0f:33:70:aa:fd:21:88:ad:87:2f:57:d8Certificate
IssuerOU=Einkorn Flageoletter Hypermoralskes\ ,O=Tarai,L=Caen,ST=Normandie,C=FR,1.2.840.113549.1.9.1=#0c18417274687269746963616c6c7940426c6462756e642e536eNot Before02/08/2023, 03:57Not After01/08/2026, 03:57SubjectOU=Einkorn Flageoletter Hypermoralskes\ ,O=Tarai,L=Caen,ST=Normandie,C=FR,1.2.840.113549.1.9.1=#0c18417274687269746963616c6c7940426c6462756e642e536eb4:cb:66:c7:37:b6:b3:36:ae:fb:5a:fd:a8:d9:9d:3a:fe:a3:7d:49:c3:f2:ee:e4:26:2e:aa:1d:aa:23:4e:72Signer
Actual PE Digestb4:cb:66:c7:37:b6:b3:36:ae:fb:5a:fd:a8:d9:9d:3a:fe:a3:7d:49:c3:f2:ee:e4:26:2e:aa:1d:aa:23:4e:72Digest Algorithmsha256PE Digest MatchestrueHeaders
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
GetTempPathA
GetFileSize
GetModuleFileNameA
GetCurrentProcess
CopyFileA
ExitProcess
SetEnvironmentVariableA
Sleep
GetTickCount
GetCommandLineA
lstrlenA
GetVersion
SetErrorMode
lstrcpynA
GetDiskFreeSpaceA
GlobalUnlock
GetWindowsDirectoryA
SetCurrentDirectoryA
GetLastError
CreateDirectoryA
CreateProcessA
RemoveDirectoryA
CreateFileA
GetTempFileNameA
ReadFile
WriteFile
lstrcpyA
MoveFileExA
lstrcatA
GetSystemDirectoryA
GetProcAddress
GetExitCodeProcess
WaitForSingleObject
CompareFileTime
SetFileAttributesA
GetFileAttributesA
GetShortPathNameA
MoveFileA
GetFullPathNameA
SetFileTime
SearchPathA
CloseHandle
lstrcmpiA
CreateThread
GlobalLock
lstrcmpA
FindFirstFileA
FindNextFileA
DeleteFileA
SetFilePointer
GetPrivateProfileStringA
FindClose
MultiByteToWideChar
FreeLibrary
MulDiv
WritePrivateProfileStringA
LoadLibraryExA
GetModuleHandleA
GlobalAlloc
GlobalFree
ExpandEnvironmentStringsA
user32
ScreenToClient
GetSystemMenu
SetClassLongA
IsWindowEnabled
SetWindowPos
GetSysColor
GetWindowLongA
SetCursor
LoadCursorA
CheckDlgButton
GetMessagePos
LoadBitmapA
CallWindowProcA
IsWindowVisible
CloseClipboard
SetClipboardData
EmptyClipboard
PostQuitMessage
GetWindowRect
EnableMenuItem
CreatePopupMenu
GetSystemMetrics
SetDlgItemTextA
GetDlgItemTextA
MessageBoxIndirectA
CharPrevA
DispatchMessageA
PeekMessageA
ReleaseDC
EnableWindow
InvalidateRect
SendMessageA
DefWindowProcA
BeginPaint
GetClientRect
FillRect
DrawTextA
EndDialog
RegisterClassA
SystemParametersInfoA
CreateWindowExA
GetClassInfoA
DialogBoxParamA
CharNextA
ExitWindowsEx
GetDC
CreateDialogParamA
SetTimer
GetDlgItem
SetWindowLongA
SetForegroundWindow
LoadImageA
IsWindow
SendMessageTimeoutA
FindWindowExA
OpenClipboard
TrackPopupMenu
AppendMenuA
EndPaint
DestroyWindow
wsprintfA
ShowWindow
SetWindowTextA
gdi32
SelectObject
SetBkMode
CreateFontIndirectA
SetTextColor
DeleteObject
GetDeviceCaps
CreateBrushIndirect
SetBkColor
shell32
SHGetSpecialFolderLocation
ShellExecuteExA
SHGetPathFromIDListA
SHBrowseForFolderA
SHGetFileInfoA
SHFileOperationA
advapi32
AdjustTokenPrivileges
RegCreateKeyExA
RegOpenKeyExA
SetFileSecurityA
OpenProcessToken
LookupPrivilegeValueA
RegEnumValueA
RegDeleteKeyA
RegDeleteValueA
RegCloseKey
RegSetValueExA
RegQueryValueExA
RegEnumKeyA
comctl32
ImageList_Create
ImageList_AddMasked
ImageList_Destroy
ord17
ole32
OleUninitialize
OleInitialize
CoTaskMemFree
CoCreateInstance
Sections
.text Size: 24KB - Virtual size: 23KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 5KB - Virtual size: 4KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 1024B - Virtual size: 106KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.ndata Size: - Virtual size: 64KB
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 129KB - Virtual size: 129KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ