Office (OOXML) / .DOC malware analysis — malicious · 0955f51b1403c1db

MALICIOUS

Office (OOXML) / .DOC

114.9 KB Created: 2020-07-16 08:34:00 UTC Authoring application: Microsoft Office Word 16.0000

MD5: e435dad0031fd2cabd262bb1a37ee495 SHA-1: 6bb3f11742e5644ab3318ce88dad4fb3aaed88b6 SHA-256: 0955f51b1403c1db16153606e930f6ccc8fa9721ba5d383876cd643a65734c69

222 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The sample contains VBA macros with an AutoOpen function that is triggered upon opening the document. This macro decodes a URL and uses URLDownloadToFile to download a file named 'a.tmp'. The presence of the URLDownloadToFile function and the AutoOpen macro strongly indicates a downloader functionality, likely to fetch and execute a second-stage payload. The ClamAV detection also confirms its malicious nature.

Heuristics 6

URLDownloadToFile in VBA critical OLE_VBA_DOWNLOAD

URLDownloadToFile in VBA
ClamAV: Doc.Downloader.GreenBox5-9139204-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.GreenBox5-9139204-0
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
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` `bedcd33a84fc84d1363e2e00980de42abebdcfae9383f7d363f8f516f6d87771`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	3515 bytes
`vbaProject_00.bin` `bad8fee717529df445571abe9855d97a75eadac5b1e14f4fde7d6532565db058`	vba-project	OOXML VBA project: word/vbaProject.bin	26624 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.