Office (OLE) malware analysis — malicious · 28e899c631f211d7

MALICIOUS

Office (OLE)

63.0 KB Created: 2009-01-15 15:23:00 Authoring application: Microsoft Word 10.1

MD5: 7ca1d40ada037a2bf1192d4b751638a3 SHA-1: b048e75bb598627f61b43549ec3e918032c2648c SHA-256: 28e899c631f211d71bbc7defab5a27538775dc4be2cd62442546ad15ca52b67c

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell

The file is identified as malicious by ClamAV and contains VBA macros. A critical heuristic indicates the presence of a Shell() call within the VBA code, suggesting an attempt to execute external commands. This is further supported by the detection of suspicious extracted artifacts, specifically 'macros.bas', which likely contains the malicious VBA code. The primary intent appears to be the execution of a second-stage payload via shell commands.

Heuristics 5

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.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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` `b76007a4a5f74fa0f54e59ec7c077dadd0aebd9dd33beecae049a343c72814f0`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5760 bytes
Detection ClamAV: Doc.Trojan.Marker-3 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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