Office (OLE) / .XLS malware analysis — malicious · 2c2afa4bd0219516

MALICIOUS

Office (OLE) / .XLS

129.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2021-10-05

MD5: c1b3b4d5043bf336aff2d066e4f011c2 SHA-1: d7630de352f83d73266cbd45ca7919d4bea78c45 SHA-256: 2c2afa4bd021951665e48eb872e5c5eac732de5f7fd2c468eb3ae63cad1a8955

242 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1071.001 Web Protocols

The file is a macro-enabled Excel spreadsheet containing Auto_Open and Auto_Close macros, indicating malicious intent. The presence of the URLDownloadToFile API call and embedded URLs suggests the primary function is to download and execute a second-stage payload. The ClamAV detection as 'Doc.Downloader.Docusign112100-9908075-0' further supports this. The VBA script itself appears to be primarily for UI manipulation, but the core malicious functionality is likely within the downloaded payload.

Heuristics 7

Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD

Reference to URLDownloadToFile API
ClamAV: Doc.Downloader.Docusign112100-9908075-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Docusign112100-9908075-0
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://51.254.164.241/
- http://94.140.112.136/
- http://84.32.188.23/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `795a6e99893f7f916f8bca1e0f1587adaf2d9626b54574826103132696b199f9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5309 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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