Office (OOXML) / .DOC malware analysis — malicious · 0bd4229e28ab1144

MALICIOUS

Office (OOXML) / .DOC

127.8 KB Created: 2020-09-23 09:49:00 UTC Authoring application: Microsoft Office Word 16.0000

MD5: 309b2adea77bd363a2fde1ff542b3480 SHA-1: 169854cd36316f55a2f55e33c3626ab625c60e1e SHA-256: 0bd4229e28ab114432f4f2e1c7b3ffdee5b04c6549e362bda8a997cd9b51b9e8

262 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample is a malicious Office document containing VBA macros. The AutoOpen macro executes a Shell() command, which is likely responsible for downloading and saving a second-stage payload to the path 'c:\programdata\a5ffb.pdf'. This indicates a downloader or droppper functionality.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Doc.Downloader.SVCReady-8f5af0a5f0da7070-9951542-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.SVCReady-8f5af0a5f0da7070-9951542-0
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
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` `bc27c62938a909525fbd8aeafbeab7fdac133a60de8351b420b4aa3c37b7f511`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	13231 bytes
`vbaProject_00.bin` `7ce8da45a123f0924c60cbb7b01b1dd45e5e77f7aea2c4e52701531e43428dd0`	vba-project	OOXML VBA project: word/vbaProject.bin	47104 bytes

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