Office (OLE) malware analysis — malicious · 62cf273595d15f17

MALICIOUS

Office (OLE)

153.5 KB Created: 2020-09-15 04:19:00 Authoring application: Microsoft Office Word

MD5: ffad3001dd0ca42afc9417e202532d08 SHA-1: 54a9c7de3af91cc394a1818ef39b0870ddb817b8 SHA-256: 62cf273595d15f172a4e5465d9ab16c22bb5f52d2626a84c3811e1a111f77fa3

262 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains a Document_Open VBA macro that triggers an obfuscated PowerShell stager. This stager is designed to download and execute a secondary payload, as indicated by the critical heuristic 'OLE_USERFORM_OBFUSCATED_POWERSHELL'. The presence of VBA macros and the specific macro name 'Document_open' strongly suggest a malicious document intended for initial compromise via spearphishing.

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.Ewlu-9762397-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Ewlu-9762397-0
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` `262eaa2cfabe15c408f9ed0f71f3e80b6e1636570aa2563811ecb34f68c15392`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	22860 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.