Qbot — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 e12433a64cde6526…

MALICIOUS

Office (OLE) / .XLS

47.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 920ca6ab62be3f6aa443a24401183c5e SHA-1: b04403286520b2564f8c9c1847cc5e6bea27dc43 SHA-256: e12433a64cde6526f5d7d8ca095521f7534770c4ffef6b060b09bb14e98ec4f1
200 Risk Score

Malware Insights

Qbot · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File

The file contains Excel 4.0 macros, specifically an Auto_Open macro that utilizes dangerous functions like RUN. It also contains a lure to enable content, a common tactic for macro-based malware. The presence of URLDownloadToFile API calls and embedded URLs suggests the macro is designed to download and execute a second-stage payload. ClamAV detection as Xls.Dropper.Qbot-9798074-0 strongly indicates the Qbot family.

Heuristics 6

  • Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD
    Reference to URLDownloadToFile API
  • ClamAV: Xls.Dropper.Qbot-9798074-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Qbot-9798074-0
  • XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://china.asiaspain.com/tertgev/�
    • http://china.asiaspain.com/tertgev/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
857fae3dde766526b3de621d7f48e792e1a3a31b0bb941d6893cf28f50d31b35		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 3017 bytes

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