Office (OLE) / .XLS malware analysis — malicious · 3c86a8d92119d067

MALICIOUS

Office (OLE) / .XLS

62.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: 3ed422c529e370acb99d4e7548cd8c1b SHA-1: 4a23ec09ea5eb97977727c6c283f339ca7849681 SHA-256: 3c86a8d92119d067e739fccd8c8a06102f27756df49017e5d61c236ed9c9eaa6

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File T1059.004 PowerShell T1218 Signed Binary Proxy Execution T1059 Command and Scripting Interpreter

The file is an Excel spreadsheet containing both VBA and XLM macros. The presence of a Workbook_Open macro and the 'SE_ENABLE_LURE' heuristic indicate that the document attempts to trick the user into enabling macros. The 'SC_STR_URLDOWNLOAD' heuristic suggests the macro downloads content from a URL. The embedded URL 'https://staffordhvacservices.com/crun20.gif' is likely used for this purpose, potentially to download and execute a second-stage payload.

Heuristics 8

Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD

Reference to URLDownloadToFile API
Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN

Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN

Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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 https://staffordhvacservices.com/crun20.gif�
- https://staffordhvacservices.com/crun20.gif

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `d4222e1ad83b892546402a65bce1342319760d5f0e17d0c73ae5f07e792beb86`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	9447 bytes
`macros.bas` `c29faf2da8b6b84c63880f8f3ff09f138acdaa94ad9406cab75b546ae0e54428`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	979 bytes

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