Office (OLE) / .XLS malware analysis — malicious · 334f1aaa743723f2

MALICIOUS

Office (OLE) / .XLS

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

MD5: e571e8b188da128c6c06904ac8bbd702 SHA-1: 7edc13d2b87d97a459780fc4e6939362d5e828bb SHA-256: 334f1aaa743723f2dd42963b4bc60df52021cc0ae7d7f55d4aa618bae84ec376

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File T1204 User Execution T1059 Command and Scripting Interpreter

The file is an Excel spreadsheet containing both XLM and VBA macros. The presence of a Workbook_Open macro and heuristics indicating a lure to enable content suggest the document is designed to execute malicious code upon opening. The script likely attempts to download a second-stage payload from the embedded URL http://tak-tik.site/crun20.gif, which is a common technique for malware delivery.

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 http://tak-tik.site/crun20.gif�
- http://tak-tik.site/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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