Remcos — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 04ea5c74e910a261…

MALICIOUS

Office (OLE) / .XLS

110.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2022-11-17
MD5: 2d10b33f03106f1561c50fd8be96d28c SHA-1: 0359569a6de26c4c0def0a096b9ab5fa7e1180e0 SHA-256: 04ea5c74e910a261b38f769a145ce0f7370badc8f88f53715c44bb73899bc736
162 Risk Score

Malware Insights

Remcos · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The file is an Excel spreadsheet containing VBA macros. The macros utilize CreateObject and CallByName functions to load and process an XML document from a URL. The embedded URL 'http://192.3.76.220/mac.jpg' is likely used to download and execute a secondary payload. ClamAV detection confirms this as a Remcos downloader variant.

Heuristics 5

  • ClamAV: Xls.Downloader.Remcos-ffff7e420001049f-9951592-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Remcos-ffff7e420001049f-9951592-0
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName call
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://192.3.76.220/mac.jpg
    • http://192.3.76.220/mac.jpg�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
2e5bacc872274a06edc9620c3d1bce7ecee930d6f3ea90c3755553fec7313057		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1003 bytes

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