Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ae1fa9648d4e920e…

MALICIOUS

Office (OLE)

969.0 KB Created: 2020-06-16 13:04:54 Authoring application: Microsoft Excel First seen: 2020-07-24
MD5: 1a3932767d20cac41208ae11c4755069 SHA-1: ae8b29e895bff37b30d97f8803b7b925f195b3fd SHA-256: ae1fa9648d4e920e7fce9a21887be11cfd2b2a28e72a98fd9d0aa2163bf5d58d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The file contains Excel 4.0 (XLM) macros, specifically an Auto_Open defined name that utilizes dangerous formula APIs like RUN. This indicates an attempt to execute arbitrary code, likely to download and run a secondary payload from a remote source. The presence of numerous benign URLs in the document body does not detract from the malicious nature of the XLM macros.

Heuristics 4

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns# In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/mm/In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#In document text (OLE body)
    • http://purl.org/dc/elements/1.1/In document text (OLE body)
    • http://ns.adobe.com/photoshop/1.0/In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 165890 bytes
SHA-256: beeb64274b41243379c9b5816b718f827421798f6ddb2dcd2898fa573f4950af
Preview script
First 1,000 lines of the extracted script
' 0085     20 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden -  sodxnesDllY
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet
' 0085     26 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  UyZLbehZxbGplaukb
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet
' 0085     15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet1
' 0085     15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet1
' 0085     15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet1
' 0085     15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet1
' 0085     15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet1
' 0085     15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet1
' 0085     15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet1
' 0085     15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet1
' 0085     15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet1
' 0085     15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet1
' 0085     15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden -  Sheet2
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0018     45 LABEL : Cell Value, String Constant - aBmDGJBZDhRNCWNERbKKxjLhtIpHsw len=0 
' 0018     56 LABEL : Cell Value, String Constant - aBmDGJBZDhSNCWNERbLKxjLhtIpHswXLJDVSoKjok len=0 
' 0018     18 LABEL : Cell Value, String Constant - aOL len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  sodxnesDllY!HE34370 
' 0018     49 LABEL : Cell Value, String Constant - ayqmyPeznwUPsubvBJyennlqOVcHTTimph len=0 
' 0018     42 LABEL : Cell Value, String Constant - baCjBmqRrDwPMiEdVRctJeSbytX len=0 
' 0018     49 LABEL : Cell Value, String Constant - BwkGvmBLttgTtQdrYqcgGtrlEBXtSYUfix len=0 
' 0018     45 LABEL : Cell Value, String Constant - byRdRPJbYueouqDUVqrBYGjyflFNDi len=0 
' 0018     33 LABEL : Cell Value, String Constant - BzQTWOnCufNPjMRebK len=0 
' 0018     35 LABEL : Cell Value, String Constant - cHhTjmphHjOytiDtkxJr len=0 
' 0018     54 LABEL : Cell Value, String Constant - CJQtHGWadUtJClTVqTXlhQeEEenzcvbyRqRcWoY len=0 
' 0018     56 LABEL : Cell Value, String Constant - crkUDFZCGURzNmmOWiLeKizWwICUEaKVaXizOWXgF len=0 
' 0018     22 LABEL : Cell Value, String Constant - CrXggfk len=0 
' 0018     40 LABEL : Cell Value, String Constant - cUsWBygVpfWkuddQQrBNoJnMe len=0 
' 0018     58 LABEL : Cell Value, String Constant - cvEsYUUSXJPWnONdTWOmQusaPjZQeoXXKKluHiDhGYj len=0 
' 0018     56 LABEL : Cell Value, String Constant - cvpfLUUTXJCJnzzPTWOmCueMPjMQeoKXKwYusVDUG len=0 
' 0018     31 LABEL : Cell Value, String Constant - dcFlEptTtFyROkHf len=0 
' 0018     59 LABEL : Cell Value, String Constant - DdoiBkHqCHEPguDENlfJLrxRZPupqotelsJjjyprjJlQ len=0 
' 0018     58 LABEL : Cell Value, String Constant - dechSLSwXJZdfXwZEojYsjanyhgUGhEQeMdPTthfZro len=0 
' 0018     54 LABEL : Cell Value, String Constant - dEPJbLhRchepHVdenMHjlSYrzpVQRPUFMTjLKaQ len=0 
' 0018     59 LABEL : Cell Value, String Constant - DfLuqezpguFnnaNnKXlTkWazolfxuRnMSOZdrNOYhcGW len=0 
' 0018     28 LABEL : Cell Value, String Constant - dfzchuranNNow len=0 
' 0018     63 LABEL : Cell Value, String Constant - dgYwZFokZtjaoyhhUHiERfNeQUtifZroMhGMITXlHJScWzQi len=0 
' 0018     24 LABEL : Cell Value, String Constant - DHKBapiSz len
... (truncated)

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