Office (OLE) / .XLS malware analysis — malicious · 8acaf6397134ec18

MALICIOUS

Office (OLE) / .XLS

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

MD5: 1c994d8744d0f99611ab6d6ce1408676 SHA-1: ca42d5c427b13e8bafd90a406450bb076d0307e2 SHA-256: 8acaf6397134ec184063a8ba2a14d4544d3e8f6d5d38f5e1a871fa0b77ea5431

282 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The presence of Workbook_Open, Auto_Open, and Auto_Close macros, along with a critical heuristic for URLDownloadToFile, strongly indicates that this Excel file is designed to download and execute a secondary payload. The embedded URLs are the most likely sources for this payload. The ClamAV detection as 'Xls.Malware.Valyria-10029771-0' further supports the malicious nature of the file.

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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