Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 01576bfe494babd3…

MALICIOUS

Office (OLE)

142.5 KB Created: 2000-10-09 03:52:00 Authoring application: Microsoft Word 8.0
MD5: e0046b30a032c512e4952615e1245f60 SHA-1: 5c85245727d1fef2c2fc6f51ffefb9f8dc2af094 SHA-256: 01576bfe494babd36dbc6242eabefc1dca2b40de9f02027bc570f518ac2a18e3
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The critical heuristic 'OLE_VBA_SHELL' indicates the presence of shell execution within VBA macros. The extracted VBA script confirms this by attempting to write a file named 'c:\netldx.vxd' to disk and then executing commands to connect to the IP address '209.201.88.110' via FTP. The script also attempts to create a temporary log file named 'C:\hsf*.sys'. This behavior strongly suggests the sample acts as a downloader for a second-stage payload.

Heuristics 3

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • 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
264b65761b3a30febe3b83cd83d1b0d30f04dec66cd72d7d7d605f858e2cbeda		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6783 bytes
Detection
ClamAV: Doc.Trojan.Marker-1
Obfuscation or payload: unlikely

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