Office (OLE) / .DOC malware analysis — malicious · 9a4b5bbf276e3e20

MALICIOUS

Office (OLE) / .DOC

68.0 KB Created: 2016-02-10 08:02:00 Authoring application: Microsoft Office Word First seen: 2022-11-25

MD5: 6da6c35373c03725ebbf3105d9178dbb SHA-1: 11618d747d2fa5acdd1c3cb9ed7f85c46638668b SHA-256: 9a4b5bbf276e3e208715b4c133fc17984bb9671f24b31b99907afcbedd325cab

302 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer

The file contains VBA macros, including an AutoOpen subroutine, which is a common technique for initial execution. The critical heuristic OLE_VBA_HTTP_DROP_EXEC indicates that the macro downloads and saves a file to disk, likely a second-stage payload. The ClamAV detection as 'Xls.Downloader.Adnel-9756470-0' further supports its malicious nature as a downloader.

Heuristics 8

VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC

VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
ClamAV: Xls.Downloader.Adnel-9756470-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.Adnel-9756470-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen 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` `02a7d69064bb412cd31bce16b16eb1145323049e0467b0c639208923dcc2f7c8`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	17282 bytes

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