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

Static analysis result for SHA-256 4ff355fe205509c7…

MALICIOUS

Office (OLE) / .XLS

142.5 KB Created: 2006-09-28 05:33:49 Authoring application: Microsoft Excel
MD5: b045c3ee2b4f18fe97154523cbef470a SHA-1: aa5854dea26227c441d8de12ee42960235354194 SHA-256: 4ff355fe205509c77022c3a66b1d7f19b23595e7b566097cb08f55ccbfdc6625
280 Risk Score

Malware Insights

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

The critical ClamAV heuristic and high-severity VBA heuristics indicate malicious intent. The Workbook_Open macro is configured to execute automatically, and the script attempts to download and execute a second-stage payload from a series of concatenated URLs. The reconstructed URL is "http://rkepreua.com/inclube/FBXbsVAAOd1UV/,http://pozhadvokat.com/images/QmZXA9kRU8xZFG/,http://quens.renovagio.ltda/wp-includes/LAH/,http://renovomarketing.com/renovatio-marketing.com/A/,http://remedy.eventmast.com/eapn/lpN6dcApn/,http://keluargamalaysia.plibaho.com/cgi-bin/FUzc3KOKN3DNe/,http://pcbdsmab.insanrabany.sch.id/gkvb/sXVYo8HsPFQh/,http://pinaclehomesusa.net/870x9/pNp3a1iHCKaZwYE/,http://dandtremierhomes.com/eapn/lpN6dcApn/". Additionally, a suspicious batch file path 'c:\programdata\rtyusdj.bat' was extracted.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetExcel02226-9938630-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02226-9938630-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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
ffa342a8bb4eb541fe833e6254cf3f6e2f7d6f5436c011440a061030b6684f64		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6473 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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