Office (OLE) / .DOC malware analysis — malicious · a94b8bb36703ea28

MALICIOUS

Office (OLE) / .DOC

199.5 KB Created: 2023-09-06 23:26:00 Authoring application: Microsoft Office Word First seen: 2023-09-07

MD5: 2bf10526c5c623167810832f6b0bca6c SHA-1: d3fa33c3d86d0456a8117fe29ea700845d1f09b8 SHA-256: a94b8bb36703ea288bae378d8db74f114a3aebf4d04c96ac7f5e561e8a4e5d60

242 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The Document_Open VBA macro is designed to execute a command that downloads a second-stage payload from the URL https://transfer.sh/IGU4fLIm4D/aruy.exe and saves it as C:\Users\Public\ubc6d.exe. The use of GetObject and cmd.exe with PowerShell indicates a downloader functionality.

Heuristics 7

ClamAV: Doc.Malware.Valyria-10008067-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-10008067-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
GetObject call high OLE_VBA_GETOBJ

GetObject call
cmd.exe reference in VBA high OLE_VBA_CMD

cmd.exe reference in VBA
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` `3d24ee6fa14085c57da7f8f0c7356c9e42fcb8b73c4adf0b3aa9df52b2a432cd`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	955 bytes

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