Office (OOXML) / .OLE malware analysis — malicious · 6c21170ee4c310fa

MALICIOUS

Office (OOXML) / .OLE

113.8 KB Created: 2020-07-14 10:25:00 UTC Authoring application: Microsoft Office Word 16.0000

MD5: b061e160aa9d083cb5ac44adbd33e160 SHA-1: cdfd893d22869810969dc5bd42ac147e1d1a1051 SHA-256: 6c21170ee4c310fad7a989bae8c08f591f0648c4099822d7931efbbaec99fa39

222 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1071.001 Web Protocols

The sample contains a VBA macro with an AutoOpen subroutine that calls a function to download a file from the URL 'http://nm5oi0.com/hboneb/sol95.php?l=puom2.cab' and save it as 'Mb.tmp'. The macro also appears to attempt to execute a file named 'regsv'. This indicates a downloader functionality, likely to fetch and execute a secondary payload.

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://nm5oi0.com/hboneb/sol95.php?l=puom2.cab
- 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` `0286348f20a12a477814b3f7d48b27e20420b07033d521a0f64dc3714a1d8a99`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	2755 bytes
`vbaProject_00.bin` `c42308e27a366776120de9855629dc482d6a34f504bd103f7553a0991cfe8bd2`	vba-project	OOXML VBA project: word/vbaProject.bin	24576 bytes

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