Office (OLE) / .DOCX malware analysis — malicious · 621854be435f3425

MALICIOUS

Office (OLE) / .DOCX

151.7 KB Created: 2020-09-14 18:36:00 Authoring application: Microsoft Office Word

MD5: d0a0e45fe9ab3e50811654f5a669f46f SHA-1: af59949d2ade96dd74cecd191df95e163ac586c3 SHA-256: 621854be435f34253592256072e4f2096b4563da99bb985bfe8f72101513aa53

262 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing a Document_Open VBA macro. This macro utilizes CreateObject to execute a PowerShell command. The obfuscated PowerShell command decodes to 'powershell -e JABaAHoAegA

Heuristics 7

Hidden UserForm PowerShell EncodedCommand stager critical OLE_USERFORM_OBFUSCATED_POWERSHELL

OLE document contains a UTF-16LE form/property string with an obfuscated PowerShell -EncodedCommand payload. The observed macro family reconstructs this hidden string with Split/Join or UserForm property reads and launches it through WMI/COM process creation. This is downloader malware, not an Office CVE exploit.
ClamAV: Doc.Malware.Generic-9760286-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9760286-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
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.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `1292a632e7e589fe2af40be48c7cc33bf98b796b982d17887300d79315ad06a4`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18499 bytes

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