Office (OOXML) / .OLE malware analysis — malicious · 555d2f6c1ecbb661

MALICIOUS

Office (OOXML) / .OLE

90.7 KB Created: 2020-10-14 08:48:00 UTC Authoring application: Microsoft Office Word 16.0000

MD5: 1a0cca1f844e839c524136d744210a89 SHA-1: 7cf923333f80ced9b63a5f0fa5efe4e8a8c16299 SHA-256: 555d2f6c1ecbb661b9aab93c79b5f895be592942ecb0a3a20da386c11f23143d

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is a malicious OOXML document containing VBA macros, specifically triggering an AutoOpen macro. ClamAV identifies it as a generic dropper. The presence of 'macros.bas' and 'vbaProject_00.bin' further confirms the macro-based execution. The primary attack pattern involves leveraging the AutoOpen macro to execute arbitrary code, likely to download and run a second-stage payload.

Heuristics 5

ClamAV: Doc.Dropper.Generic-9823779-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Generic-9823779-0
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
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.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` `0922c2b479429e40dbddd2d72b3a4b7cf87e3ce02f458f9126fb2c35d99c788e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	7500 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` `7beca5871f72e3888a31d7b72c375cb7d01088bcde27b4a222ea84ddb56d9dba`	vba-project	OOXML VBA project: word/vbaProject.bin	38400 bytes

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