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

Static analysis result for SHA-256 7a40a331fa7a62c0…

MALICIOUS

Office (OLE) / .DOC

525.5 KB Created: 2022-08-01 20:27:00 Authoring application: Microsoft Office Word First seen: 2022-08-02
MD5: 9e5e0266ab23b4cbc05272e0376866f7 SHA-1: b8e7bf8f15fa371fefa5d84e42c5cf3929ca3df6 SHA-256: 7a40a331fa7a62c03e2560207db1e63a2fa30f99d5feb55d4af98508e35bc7f1
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The sample contains a VBA macro that executes upon opening the document. This macro constructs a command to download and execute a payload from 'https://915111.ru/wp-includes/rat.exe' and saves it as 'C:\Users\Public\xczuy.exe'. The macro also creates a shortcut file at 'C:\Users\Public\ali.l.exe' which appears to be related to the execution chain. The presence of cmd.exe and PowerShell references, along with the GetObject and Document_Open heuristics, strongly indicate a malicious downloader.

Heuristics 7

  • ClamAV: Doc.Malware.Valyria-10008067-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-10008067-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • 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.
  • 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://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://ns.adobe.com/photoshop/1.0/
    • http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/
    • https://www.istockphoto.com/legal/license-agreement?utm_medium=organic&utm_source=google&utm_campaign=iptcurl
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
dec2fa4ac73298c01585398f734bd5973beaed1c43d58495aecfaecdf45468b9		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1304 bytes

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