Office (OOXML) malware analysis — malicious · 1f8f569abc9b7bb8

MALICIOUS

Office (OOXML)

19.4 KB Created: 2021-07-11 09:14:00 UTC Authoring application: Microsoft Office Word 16.0000

MD5: 5f17ad8354e9d0a07fe35602c368a47b SHA-1: 4eb206c039e8b0ebb68d9ea79abb77df4ee89da6 SHA-256: 1f8f569abc9b7bb8952843274d678585ecf6110dc382c1e6ec1c412b9e65d808

242 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros. The AutoOpen macro references PowerShell, indicating an attempt to execute a malicious script. ClamAV detections confirm this, identifying it as a downloader. The VBA code likely uses PowerShell to fetch and run a secondary payload, a common technique for malware delivery.

Heuristics 6

PowerShell reference in VBA critical OLE_VBA_PS

PowerShell reference in VBA
ClamAV: Doc.Downloader.Pwshell-10001336-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Pwshell-10001336-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
VBA project inside OOXML medium OOXML_VBA

Document contains a VBA project — 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.microsoft.com/office/word/2010/wordprocessingCanvas
- http://schemas.microsoft.com/office/drawing/2014/chartex
- http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
- http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
- http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
- http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
- http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
- http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
- http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
- http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
- http://schemas.openxmlformats.org/markup-compatibility/2006
- http://schemas.microsoft.com/office/drawing/2016/ink
- http://schemas.microsoft.com/office/drawing/2017/model3d
- http://schemas.openxmlformats.org/officeDocument/2006/relationships
- http://schemas.openxmlformats.org/officeDocument/2006/math
- http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
- http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
- http://schemas.openxmlformats.org/wordprocessingml/2006/main
- http://schemas.microsoft.com/office/word/2010/wordml
- http://schemas.microsoft.com/office/word/2012/wordml
- http://schemas.microsoft.com/office/word/2018/wordml/cex
- http://schemas.microsoft.com/office/word/2016/wordml/cid
- http://schemas.microsoft.com/office/word/2018/wordml
- http://schemas.microsoft.com/office/word/2015/wordml/symex
- http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
- http://schemas.microsoft.com/office/word/2010/wordprocessingInk
- http://schemas.microsoft.com/office/word/2006/wordml
- http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `87aa2fc59612ca261121b31a37566312105dd4b03d9aae8e14f6ccb62a11ecbd`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	2801 bytes
`vbaProject_00.bin` `69f0d7677c8190586368720a91371cf6ef264885fe6ca1a75dfb96ee86acab6e`	vba-project	OOXML VBA project: word/vbaProject.bin	19456 bytes
Detection ClamAV: Doc.Downloader.Pwshell-10001336-0 Obfuscation or payload: unlikely

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