IcedID — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 981cdead74b028ee…

MALICIOUS

Office (OOXML) / .DOC

34.5 KB Created: 2021-11-03 09:33:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: bcf87e1b82fafd33c08c9bdd35d223bd SHA-1: 7a8a5c597325222e9bb67cfacceaf3882707f217 SHA-256: 981cdead74b028ee7fb081f369abfde84e1e2ab1cd54ddd3b602ec937651904d
202 Risk Score

Malware Insights

IcedID · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059.003 Windows Command Shell

The sample is identified as IcedID by ClamAV. The VBA macro contains a Document_Open subroutine which calls a function that uses CreateObject to instantiate a 'wscript.shell' object. This object is then used to execute a command. The script reconstructs the command as 'c:\windows\explorer ' which is likely intended to launch a downloaded payload. The macro also attempts to save the document content to a text file using a name derived from the document's keywords, which is then passed to the execution function.

Heuristics 6

  • ClamAV: Doc.Downloader.IcedID-8ff0f02ff0876072-9950256-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.IcedID-8ff0f02ff0876072-9950256-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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.openxmlformats.org/markup-compatibility/2006
    • 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/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
95f4d7c4957bee95fed36acd4e054ea00eda631f792d639be7438bbc971316a5		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1024 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
d8d1d42f1d8b29234523c0021fdd7b7599e6f3b958c49086f33165e388be5f39		 vba-project OOXML VBA project: word/vbaProject.bin 15360 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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