IcedID — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 ab3e3ee4dead30b9…

MALICIOUS

Office (OOXML) / .DOC

34.3 KB Created: 2021-11-01 04:36:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 2962d0682d1bd41e0963785884a5c1d0 SHA-1: af64ff14d175fa68d9c25eced7d4021beb3c0fa9 SHA-256: ab3e3ee4dead30b97729cd2f5781ae1cd5eda141b02489013147069462b8284a
202 Risk Score

Malware Insights

IcedID · confidence 95%

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

The sample is a malicious OOXML document containing VBA macros. The critical ClamAV heuristic identifies it as Doc.Downloader.IcedID. The VBA macro 'macros.bas' contains a Document_Open subroutine that calls a function to execute a file. The script reconstructs the command 'explorer.exe' to launch a downloaded payload, indicating a downloader functionality. The family is identified as IcedID based on the ClamAV detection name.

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
e1e98b02628c4089e0de78e88ad26b143045bba253bcde8e702628acec76461b		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1032 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
8512051106c8df3330fef4b695c34a5e5626b49715cc52bee0abdb61b7f30444		 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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