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

Static analysis result for SHA-256 130282c194b24451…

MALICIOUS

Office (OLE) / .XLS

231.5 KB Created: 2022-12-13 02:42:24 Authoring application: Microsoft Excel First seen: 2022-12-13
MD5: 9ae05967f9ab14cbf4a56b02c48fcf14 SHA-1: bd5aeb7c197373916ae4aa82108837572ecc9f74 SHA-256: 130282c194b24451677eafe97cc7734217826a50469060f5120d82c0f3f89887
482 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1105 Ingress Tool Transfer T1059.003 Windows Command Shell

The sample is an Excel file containing VBA macros that are triggered by the AutoOpen and Workbook_Open events. The macros utilize WScript.Shell and CreateObject to download and execute a second-stage payload from the URL https://divmainbot.pages.dev/xxb.exe. The document body explicitly prompts the user to 'ENABLE CONTENT', indicating a social engineering lure to bypass macro security settings.

Heuristics 12

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
  • ClamAV: Doc.Dropper.Agent-6412232-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6412232-1
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 https://divmainbot.pages.dev/xxb.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
fec64af336687992d17c5c2801046e09b11595a3f804ef500dbaa234211592e7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 91533 bytes

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