Malicious Office (OOXML) / .DOC — malware analysis report

Static analysis result for SHA-256 7e2ae571fd689bff…

MALICIOUS

Office (OOXML) / .DOC

117.5 KB Created: 2020-06-24 09:07:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 229c1fe4c923ceb742573e92679e4916 SHA-1: 4dfe146e333f3147910d51cb9193e4b2d7cf7da0 SHA-256: 7e2ae571fd689bff2673097c92a334e0032f87274fbacb7dc5580ac3da51eb97
280 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File

The sample contains VBA macros, including an AutoOpen macro, which is a common technique for initial execution. The critical heuristic OLE_VBA_DOWNLOAD indicates the use of URLDownloadToFile, and OLE_VBA_URLDOWNLOAD_REVERSED_LOLBIN confirms it's used with WScript.Shell.Exec to download and execute a second-stage payload. The ClamAV detection further supports its malicious nature as a downloader. No specific family could be identified, but the behavior is consistent with a macro-based downloader.

Heuristics 7

  • URLDownloadToFile in VBA critical OLE_VBA_DOWNLOAD
    URLDownloadToFile in VBA
  • VBA URLDownloadToFile reversed-LOLBin launcher critical OLE_VBA_URLDOWNLOAD_REVERSED_LOLBIN
    VBA auto-exec macro downloads a payload with URLDownloadToFile and launches it through WScript.Shell.Exec using a reversed command string. This is a high-confidence downloader/launcher pattern, not an Office parser CVE.
  • ClamAV: Doc.Downloader.GreenBox6-9139694-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.GreenBox6-9139694-0
  • 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.

FilenameKindSourceSize
macros.bas
065b64002333c2347456caf3b57da59566db73094f84438ce73c6b754bfb8f9b		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 4929 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
2dc638ddf284c58d0bd2419e6ef1b5ad7047ea9d3f56e217da561d303db9d0b8		 vba-project OOXML VBA project: word/vbaProject.bin 29184 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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