Office (OLE) / .XLS malware analysis — malicious · 179be06a26d95000

MALICIOUS

Office (OLE) / .XLS

277.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-07-13

MD5: 596e903679382a2c35e89de4631ccd42 SHA-1: 396de486dbaf673133ae506115c57994c11cdf7d SHA-256: 179be06a26d95000a861da9f8457f89b33dbfe86d6275441b9ec37f4f0951f68

134 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing for CVE_2017_0199 indicates that this OLE file is designed to exploit a vulnerability to download a remote payload. The embedded URL, http://192.3.243.157/wiz/wedwedwedwedwedwedwewedwedwedwedwed%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23wedwedwedwedwedwed.DOC, is the likely source of this payload. The presence of embedded PDF objects and the lack of executable VBA statements suggest a sophisticated delivery mechanism, possibly involving a chained exploit.

Heuristics 6

OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199

Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE

A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
VBA project contains no executable statements low OLE_VBA_MACROS

Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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://192.3.243.157/wiz/wedwedwedwedwedwedwewedwedwedwedwed%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23wedwedwedwedwedwed.DOC

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1206 bytes
`font_00_sfnt_off0000817d.bin` `68d167e68895a344f3603a4efd0d8438eb8fdebe759cee48f2b4adf75c76c961`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x817D	12100 bytes
`font_01_sfnt_off00009f95.bin` `50551000b9f90b3f445ee94749557d9ddf96697a74984b3ccf3d2bae66910750`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9F95	15820 bytes
`polyglot_child_pdf_off00000e00.pdf` `1ab43b8a9cd915e22729d8138b20d11756d25e8c4e343c164e608a219a951831`	polyglot-child-pdf	Secondary PDF body inside ole container at offset 0xE00	280064 bytes
`polyglot_child_pdf_off00006000.pdf` `64453a7af5484c92b18aa2ec938e6b1cbeb8269c58fa578494bd5aafa23591b7`	polyglot-child-pdf	Secondary PDF body inside ole container at offset 0x6000	259072 bytes
`polyglot_child_pdf_off0000e200.pdf` `350e498a27becdac9614703a14efe0752900042678739d7ee8deb2740c3c229b`	polyglot-child-pdf	Secondary PDF body inside ole container at offset 0xE200	225792 bytes
`polyglot_child_pdf_off00015e00.pdf` `9083160268e21abb29742bee49ceab2c4f358f788dc7b349e80b2657cff1d769`	polyglot-child-pdf	Secondary PDF body inside ole container at offset 0x15E00	194048 bytes

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