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

Static analysis result for SHA-256 2f1179c0c1d9cc62…

MALICIOUS

Office (OLE) / .XLS

43.5 KB Created: 2018-12-06 20:43:11 Authoring application: Microsoft Excel First seen: 2022-07-31
MD5: 10689fc6d13b0495fd0acda8c4102645 SHA-1: 0106b4ee9ce08f36aa08012952fc7b24e370df1b SHA-256: 2f1179c0c1d9cc622af23f526b1f0132da4560207435fac38eec626ca74b2b7e
380 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample is an Excel spreadsheet containing VBA macros. The 'Workbook_Open' macro is present and uses 'Shell()' and 'WScript.Shell' to download and execute a second-stage payload. The document body instructs the user to enable content, a common lure for macro-based malware.

Heuristics 9

  • 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.
  • 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.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
913887c9549a07a533ae692747d076ea7f188624b2b75d024add7709efd349fe		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 15501 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.