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

Static analysis result for SHA-256 93176f8a143ea06d…

MALICIOUS

Office (OLE) / .DOT

1022.0 KB Created: 2010-02-23 06:38:00 Authoring application: Microsoft Office Word
MD5: 4ae97d67e8ff59619790d287bf96cd1d SHA-1: b30165e1a092d39bb1795461b91d33627bc58ef6 SHA-256: 93176f8a143ea06dd1bbfc1718010f47c796bc9875d74ab7fe2e10027944af7f
208 Risk Score

Malware Insights

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

The file is a Microsoft Office template containing a large VBA macro. The critical heuristic firing indicates a Shell() call within the VBA, and the high severity firings confirm this is an AutoOpen macro designed for automatic execution. This suggests the macro is intended to download and execute a second-stage payload from one of the embedded URLs. The obfuscated document body does not provide further context on the lure.

Heuristics 7

  • 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.
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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://addbalance.com/word/datefields1.htm
    • http://www.users.zetnet.co.uk/pcgardner/ee/Grapevine/180.txt
    • http://www.thedoctools.com/downloads/basConvertNumbersToText.shtml
    • http://wordtips.vitalnews.com/Pages/T0009_Adding_Quotes.html
    • http://wordtips.vitalnews.com/Pages/T0199_Adding_Parentheses_in_VBA.html
    • http://www.theofficeexperts.com/VBASamples/Word01.htm
    • http://www.jojo-zawawi.com/code-samples-pages/code-samples.htm�
    • http://help.lockergnome.com/office/Footnotes-Endnotes-dealing-older-programs-MS-Word-ftopict850093.html
    • http://lists.topica.com/lists/editorium/read/message.html?mid=1715119894
    • http://lists.topica.com/lists/editorium/read/message.html?mid=1715197755
    • http://dotnetjunkies.com/WebLog/roydictus/archive/2004/08/10/21625.aspx
    • http://www.tribbs.co.uk/showtip.php?myID=29&start=6
    • http://wordtips.vitalnews.com/Pages/T1302_Removing_All_Bookmarks.html�
    • http://wordtips.vitalnews.com/Pages/T0504_Determining_Word_Frequency.html
    • http://lists.topica.com/lists/editorium/read/message.html?mid=1716214209
    • http://lists.topica.com/lists/editorium/read/message.html?mid=1720027612
    • http://blog.editorium.com/2006/03/24/correcting-misspelled-words/
    • http://www.cpearson.com/excel/FirstLast.htm
    • http://www.source-code.biz/snippets/vbasic/7.htm
    • http://www.sinica.edu.tw/ftms-bin/kiwi1/luso.sh?lstype=2&dyna=%A5%C1%B0%EA&king=&reign=&yy=
    • http://ottobib.com/isbn/
    • http://www.tutorials-win.com/WordVBA/reapply-styles/
    • http://www.vbaexpress.com/kb/getarticle.php?kb_id=59
    • http://www.uninets.net/~blaisdel/word3.htm#summerize
    • http://personal-computer-tutor.com/abc2/v14/chad14.htm
    • http://www.eggheadcafe.com/conversation.aspx?messageid=30717965&threadid=30717956
    • http://www.vbaexpress.com/kb/getarticle.php?kb_id=776
    • http://w�ww.t`�ri�
    • http://www.ikingston.demon.co.uk/ee/�
    • http://support.microsoft.com/kb/212729
    • http://www.word.mvps.org/FAQs/MacrosVBA/ProcArguments.htm
    • http://us.geocities.com/oosterwal/computer/dec2frac.html
    • http://homepage.swissonline.ch/cindymeister/MyFavTip.htm#CharStyl
    • http://vbaforword.wordpress.com/2009/05/23/remove-char-styles/
    • http://groups.google.com/group/microsoft.public.word.vba.general/browse_thread/thread/e156726f1177db69/b7c5090a35294821?hl=en&ie=UTF-8&q=word+vba+double+click+on+footnote#b7c5090a35294821
    • http://office.microsoft.com/client/helppreview.aspx?AssetID=HV100760371033&ns=WINWORD.DEV&lcid=1033
    • http://word.mvps.org/faQs/Customization/ReplaceAnywhere.htm
    • http://groups.google.com/group/microsoft.public.word.word97vba/browse_thread/thread/a8eb22e766d5c24d/625660cb12807a5f?lnk=raot
    • http://vbaforword.wordpress.com/2009/05/31/recycle-current-file-in-word/
    • http://gregmaxey.mvps.org/Count_Text_Occurrences.htm
    • https://groups.google.com/group/microsoft.public.word.vba.general/msg/4e12ad178c517ce2

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
36ef18e063b936754e563c15cdd47c19f069fa02e4fd5cfa3606b39e4aec5be9		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 519046 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 52 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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