Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 0d78b9d2c73487f7…

MALICIOUS

Office (OLE)

58.0 KB Created: 2010-01-14 10:09:00 Authoring application: Microsoft Word 11.5.5
MD5: 89067941017b6b01260b4352ef000acf SHA-1: 08a7d099639bf072899de8dc6d51bbef24071fa5 SHA-256: 0d78b9d2c73487f77c9b9668e4336c0688afd4da18cd3fe3ffb20f6a280e93d5
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample contains VBA macros that utilize the Shell() function to execute commands. The script attempts to download a payload from the IP address 209.201.88.110 and save it as 'c:\hsf*.sys', then execute it via 'c:\netldx.vxd'. This indicates a downloader or droppper functionality.

Heuristics 4

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Trojan.Marker-31 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-31
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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
4da5179075b37d5ec216fc856ea2a2edfc32fbe26063c0c42395d8c50817d9ae		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 5173 bytes
Detection
ClamAV: Doc.Trojan.Marker-3
Obfuscation or payload: unlikely

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