Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 01810f6e881035a5…

MALICIOUS

Office (OLE)

58.5 KB Created: 2009-03-27 21:47:00 Authoring application: Microsoft Word 11.1
MD5: 81240df862906c42d5a391732ac5bee2 SHA-1: be3972eec59c420f30bedb8539dfa81eb60e96f1 SHA-256: 01810f6e881035a57be6a9999f3a20c802453b79300b1bdbe1cf6cb5eca905c9
200 Risk Score

Malware Insights

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

The sample contains VBA macros that disable macro security and attempt to download a second-stage payload. The script constructs a URL to '209.201.88.110' and writes it to 'c:\netldx.vxd', along with FTP credentials. It also attempts to log malicious content to a temporary file 'c:\hsf????.sys'. The ClamAV detection further supports the malicious nature of the file.

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
ef112b9c56c3ad0203e20e819919982ffdc6a0f9a7250b1c3288b60535b77a53		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 5635 bytes
Detection
ClamAV: Doc.Trojan.Marker-3
Obfuscation or payload: unlikely

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