Office (OLE) / .XLS malware analysis — malicious · 3e4d8dbf5c661892

MALICIOUS

Office (OLE) / .XLS

199.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: e121f5b1079748488d88fd470b2edcff SHA-1: e114e9c97b0781e6c340aeb110657bd232ef1e7d SHA-256: 3e4d8dbf5c6618929757d3fdd74a5c07be9d5e72a24b7272d31660698abd76b3

282 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer

The file is an Excel spreadsheet containing VBA macros, specifically a Workbook_Open macro. This macro is designed to execute automatically when the workbook is opened. The presence of the SC_STR_URLDOWNLOAD heuristic indicates that the macro attempts to download content from a URL. The extracted URLs are likely used to fetch and execute a secondary payload, which is a common technique for malware delivery. The ClamAV detection further confirms its malicious nature.

Heuristics 8

Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD

Reference to URLDownloadToFile API
ClamAV: Xls.Malware.Valyria-10029771-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Valyria-10029771-0
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close macro
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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://94.140.112.119/
- http://190.14.37.232/
- http://45.153.241.58/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `f7c44edd92c912b12cf78543de6c50fb587a545950b296cb99a4a89b00c02672`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3917 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 shell/COM execution token(s).

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