IcedID — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 27b8a197d7ae0f45…

MALICIOUS

Office (OOXML) / .DOC

34.5 KB Created: 2021-10-22 10:33:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: aca3ce06cbd73347cfdc1019f37fa0b4 SHA-1: debfcecf4cd178a6b266502ad9b5e2602638bfff SHA-256: 27b8a197d7ae0f4538f79814ae2885e8b654a1633cc8caedf54f52aa931e0238
122 Risk Score

Malware Insights

IcedID · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is identified as malicious by ClamAV with the signature 'Doc.Downloader.IcedID'. The VBA macro contains an AutoOpen subroutine which reconstructs a filename from a reversed string in the document's 'Category' property, resulting in 'C:\Users\Public\Documents\document.txt'. It then saves the document content to this file and executes it using 'WshShell.run'. This indicates a downloader or dropper functionality consistent with the IcedID family.

Heuristics 4

  • ClamAV: Doc.Downloader.IcedID-8ff0f02ff0876072-9950256-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.IcedID-8ff0f02ff0876072-9950256-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • 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
2c6a1adceb1164fba6c26eb9483c02172ff1cff99eb3a942cc8726179bb21403		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 892 bytes
vbaProject_00.bin
4c0c828aa71eeec5f23b2ee8a5d219fd8abc5b363070535cdfd18170b7bd4c9d		 vba-project OOXML VBA project: word/vbaProject.bin 15360 bytes

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