IcedID Office (OOXML) / .DOC malware analysis — malicious · 4ae4a0a3de12d724

MALICIOUS

Office (OOXML) / .DOC

34.2 KB Created: 2021-11-09 09:45:00 UTC Authoring application: Microsoft Office Word 16.0000

MD5: e1567639cfea8107fa5800d2fb4323be SHA-1: f8010cbe78dc98e2c19fa7c75686b5f38c121b17 SHA-256: 4ae4a0a3de12d724d7a275986a0bb7ce6d6a2cb3eb38965499c648bd1d3c0494

322 Risk Score

Malware Insights

IcedID · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample is an OOXML document containing VBA macros, as indicated by multiple heuristic firings including OLE_VBA_DOCOPEN and OLE_VBA_SHELL. The Document_Open macro is designed to execute a script that uses WScript.Shell to run a command. The script reconstructs the command to 'exploite' which is likely intended to execute a downloaded payload. The ClamAV detection of 'Doc.Downloader.IcedID' strongly suggests the IcedID family. The macro saves the document content to a file named by the 'keywords' property, which is then used as the argument for the 'exploite' command.

Heuristics 8

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
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.

Filename	Kind	Source	Size
`macros.bas` `2568830be2731e420e25a1f88ba06837e7fdd7d976a82a7a4c38249e91103c46`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	1014 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `b0e5373b8ea10ef98e83ca6d07940bba864a9849318e0f008b6f34df1e78fa74`	vba-project	OOXML VBA project: word/vbaProject.bin	15360 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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