Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 0b0843fec59e2e7c…

MALICIOUS

Office (OLE) / .DOC

32.5 KB Created: 2020-06-06 13:44:00 Authoring application: Microsoft Office Word
MD5: 83260221043370058f54c0beb5be4fc4 SHA-1: 32811ec2574f6b060f249478322c0987a8da9784 SHA-256: 0b0843fec59e2e7c90b04d88f9d90f7e6a3c8e7511a601d20ba588a52380781b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros. The AutoOpen macro triggers a Shell() call, which is designed to execute a command that downloads and runs a second-stage payload from the URL http://wg-mallestig.at/librarif. This indicates a downloader or droppper functionality.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://wg-mallestig.at/librarif
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
77200b79ebafd6168236cef12f56945b0dd1cfdab7462a2517ede5938b21cee1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1022 bytes

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