Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f4b8b19553fe2098…

MALICIOUS

Office (OLE)

61.0 KB Created: 2001-03-23 14:00:00 Authoring application: Microsoft Word 8.0
MD5: 98fa44ebd67b15c12e312494755d9f93 SHA-1: 612222e6281e4a569ca615bf17f7d648eb200537 SHA-256: f4b8b19553fe2098e674d824228bc7982c6dcbb0a04525cd44913ef647d0edda
320 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is an OLE document containing VBA macros. The 'Document_Open' macro is configured to execute a shell command, indicating it's designed to download and execute a second-stage payload. ClamAV detections further confirm its malicious nature. The document body text appears to be legitimate, suggesting a lure.

Heuristics 7

  • 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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.

FilenameKindSourceSize
macros.bas
5a2adb14adc98f27dac821e61aa0a35e5940228442663e5427188254ea94fdb9		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 27108 bytes
Detection
ClamAV: Doc.Trojan.Eight941-1
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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