Qbot — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 d7f8bc053cf47fdc…

MALICIOUS

Office (OLE) / .XLS

586.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2021-10-27
MD5: fef399832b77edcffa5af15e9c5dcf37 SHA-1: 34d67434e112d22596b7dcea4813a3d6e4cd25a0 SHA-256: d7f8bc053cf47fdc6393776ffaf2fbf473e74f861766473c37368d756f39fc1e
160 Risk Score

Malware Insights

Qbot · confidence 95%

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

The file is an Excel spreadsheet containing VBA macros, specifically an Auto_Open macro, which is a common delivery mechanism for Qbot. The macros appear to be designed to download and execute a second-stage payload using the URLDownloadToFileA function. The ClamAV detection name 'Xls.Downloader.Qbot-b760f03263b7c21b-9950248-0' further supports the Qbot family attribution.

Heuristics 4

  • ClamAV: Xls.Downloader.Qbot-b760f03263b7c21b-9950248-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Qbot-b760f03263b7c21b-9950248-0
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
496074bf956e6cb0b215a23b0cd41c5a3bbdfa3b480ff8e79c66739566451629		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6201 bytes

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