Office (OLE) / .XLS malware analysis — malicious · ec6e25e2e9d622d5

MALICIOUS

Office (OLE) / .XLS

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

MD5: c975257f34e981de08151d20c9ed822c SHA-1: 8649afdadf4b454f1da628a0ec899af31962f3be SHA-256: ec6e25e2e9d622d5d61abe03cda8d0cb009c846dc52a642864b78623d21b3f46

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 triggering on Workbook_Open and Auto_Open events. A critical heuristic firing indicates the use of the URLDownloadToFile API, suggesting the macro's intent is to download a payload from one of the embedded URLs. The ClamAV detection as 'Xls.Malware.Valyria-10029771-0' further supports its malicious nature. The script itself is heavily obfuscated but the presence of Workbook_Open and the URLDownloadToFile API strongly indicate a downloader functionality.

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://94.140.114.44/
- http://103.155.92.211/
- http://193.38.54.149/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `6ea0dcbce704cc9662a989ee429fec0894ed516bccab67b859e6a519d0cedde3`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3824 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 shell/COM execution token(s).

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