Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6b6e61d4281001c9…

MALICIOUS

Office (OLE)

709.0 KB Created: 2021-07-14 08:38:23 Authoring application: Microsoft Excel
MD5: f796ead669bf3d7e056f0b42709f3ad3 SHA-1: da4624c71bc85f8ccbcde37f96e0a60b7168e826 SHA-256: 6b6e61d4281001c9c434d05320145cfe6bc47875984d9b2aef80170a5583ce9b
416 Risk Score

Malware Insights

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

The Excel document contains a Workbook_Open macro that iterates through cells in 'Sheet1' to construct a string. This string is then written to a file named 'qTabular.sct' in the ALLUSERSPROFILE directory. Finally, the macro uses WScript.Shell to execute 'mshta' with the path to the created SCT file, likely to download and execute a second-stage payload. The document body contains a fake invoice, supporting the lure.

Heuristics 11

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Reference to mshta.exe high SC_STR_MSHTA
    Reference to mshta.exe
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ea23712620c775e819b2e644fd6b7e40242fd8a32d671dc6a5a3d0e01de61377		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1212 bytes

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