Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 01e03a99518d9929…

MALICIOUS

Office (OLE) / .XLS

373.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2021-04-29
MD5: b79ef699cd70085c2a22b65bf2531931 SHA-1: 2c7dd0b2fb452024ad0537ee4d7545cba576e497 SHA-256: 01e03a99518d992986ad81ceb4e226a7464a54819c2c34720da15325067a01ec
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1204.002 Malicious File

The sample is an Excel 4.0 macro-enabled workbook that uses an Auto_Open macro to execute. It employs a common lure to trick users into enabling content, which then triggers the macro. The macro is designed to download and execute a second-stage payload from one of the provided URLs.

Heuristics 6

  • XLM Auto_Open workbook with payload URL or enable-content lure critical OLE_XLM_AUTOOPEN_PAYLOAD_LURE
    Workbook contains an Excel 4.0 macro sheet with Auto_Open / Auto_Close and also exposes a payload URL or enable-content lure in the OLE bytes. This combination is a high-confidence XLM downloader/social-engineering pattern even when formula recovery cannot decode the full macro chain.
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 https://pfamilydentist.com/OgdaW8AjEF/alex.html Referenced by macro
    • https://thevoorpret.com/wQSapbrm9WmH/alex.htmlReferenced by macro

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) 5292 bytes
SHA-256: 7eb5e48f136258965c2495a123fc1d7ae2138b901360da5008973ba86cc22008
Preview script
First 1,000 lines of the extracted script
' 0085     11 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible - Docs
' 0085     12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - Docs1
' 0085     12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - Docs2
' 0085     12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - Docs3
' 0018     33 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=18 ptgRef3d 65535!A1 *UNKNOWN TOKEN* 0x0000 *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\x01\x00\x01\x00\x01\x00\x0e\x001'
' 002a      2 PRINTHEADERS : Print Row/Column Labels
' 002a      2 PRINTHEADERS : Print Row/Column Labels
' 002a      2 PRINTHEADERS : Print Row/Column Labels
' 002a      2 PRINTHEADERS : Print Row/Column Labels
' 0204     55 LABEL : Cell Value, String Constant
' 0204     54 LABEL : Cell Value, String Constant
' 0204     20 LABEL : Cell Value, String Constant
' 0204     10 LABEL : Cell Value, String Constant
' 0204     10 LABEL : Cell Value, String Constant
' 0204      9 LABEL : Cell Value, String Constant
' 0204     10 LABEL : Cell Value, String Constant
' 0204     11 LABEL : Cell Value, String Constant
' 0204      9 LABEL : Cell Value, String Constant
' 0204     12 LABEL : Cell Value, String Constant
' 0204     11 LABEL : Cell Value, String Constant
' 0204     13 LABEL : Cell Value, String Constant
' 0204     13 LABEL : Cell Value, String Constant
' 0204     10 LABEL : Cell Value, String Constant
' 0204      9 LABEL : Cell Value, String Constant
' 0204     13 LABEL : Cell Value, String Constant
' 0204     15 LABEL : Cell Value, String Constant
' 0204      9 LABEL : Cell Value, String Constant
' 0204     10 LABEL : Cell Value, String Constant
' 0204     11 LABEL : Cell Value, String Constant
' 0204     12 LABEL : Cell Value, String Constant
' 0204     12 LABEL : Cell Value, String Constant
' Sheet,Reference,Formula,Value
' Docs1,BX17,"['"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"', '65534!A1']",""
' Docs2,BO21,"['"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"&"<ERROR>"', '65535!A1']",""
' Docs3,CD9,"['"<ERROR>"', 'WORKBOOK.HIDE(ȧX25456,1)']",""
' Docs3,CD10,"['"<ERROR>"', 'WORKBOOK.HIDE(ȱT25456,1)']",""
' Docs3,CD11,"['"<ERROR>"', 'WORKBOOK.HIDE(ȻP25456,1)']",""
' Docs3,CD13,HALT(),""

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