Office (OOXML) / .XLSM malware analysis — malicious · d1a93b2f67341095

MALICIOUS

Office (OOXML) / .XLSM

87.9 KB Created: 2020-12-28 17:45:56 UTC Authoring application: Microsoft Excel 16.0300

MD5: a7f74eb8c62a53b5d93763f3947b6a72 SHA-1: 021c690948d9baef5b096e9c22e85a7512b2d688 SHA-256: d1a93b2f673410959bebb9d53e2ef09520d8a84cf1c104eda7542762ba06ab0a

200 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell

This XLSM file contains a Workbook_Open macro that utilizes Shell() and CreateObject calls, indicating it attempts to execute arbitrary commands. The macro is likely designed to download and execute a second-stage payload. No specific family could be identified, and no external IOCs were extracted.

Heuristics 6

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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 project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present
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/spreadsheetml/2006/main
- http://schemas.openxmlformats.org/officeDocument/2006/relationships
- http://schemas.openxmlformats.org/markup-compatibility/2006
- http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac
- http://schemas.microsoft.com/office/spreadsheetml/2014/revision
- http://schemas.microsoft.com/office/spreadsheetml/2015/revision2
- http://schemas.microsoft.com/office/spreadsheetml/2016/revision3

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7356de9ff1de80960db3e6d8b96631c7a009795778175a3fc8d20839e2b0e2d5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	2649 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `aeb1b15aafd0a189ab035476a14292d7bea56af5e69a41532ca2c0760a5ca3fe`	vba-project	OOXML VBA project: xl/vbaProject.bin	16896 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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