Office (OLE) malware analysis — malicious · 1a830081a824719a

MALICIOUS

Office (OLE)

42.0 KB Created: 2010-03-15 15:10:00 Authoring application: Microsoft Word 11.5.6

MD5: 1ed5dc16c5c50acaef759e713a5aadd0 SHA-1: 9e088885e61f1e91b7d693d5ee6fa08522ae00a6 SHA-256: 1a830081a824719a26be57650c569112304c8adc89fd3a2e679e8eb37fba3bfd

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File

The file is identified as malicious by ClamAV with multiple signatures, indicating it's a known trojan. The presence of a Document_Open macro and VBA macros suggests an attempt to execute malicious code upon opening. The document body is disguised as a programming worksheet, a common social engineering tactic to trick users into enabling macros. The VBA macros are likely responsible for downloading and executing a secondary payload, though the specific mechanism is not detailed in the provided heuristics.

Heuristics 4

ClamAV: Doc.Trojan.Marker-40 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Marker-40
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.
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `4d840735f64370eed491ae174d4c3cebc63d105512970d4d44c50b8d8ee19f18`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4261 bytes
Detection ClamAV: Doc.Trojan.Marker-2 Obfuscation or payload: unlikely

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