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

Static analysis result for SHA-256 62ca2ccf3e834735…

MALICIOUS

Office (OLE) / .XLS

54.0 KB Created: 2022-11-08 07:31:36 Authoring application: Microsoft Excel First seen: 2022-11-08
MD5: 8461cd373f9196882134d97b0bad1c2d SHA-1: 432fda3b6535617ad7182fcf4e20a08a3e14ba58 SHA-256: 62ca2ccf3e834735c5adbbed9a774a92e50a9e213399f35b8284213e372351e7
228 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The VBA macros within this Excel file utilize WScript.Shell and CreateObject to download and execute a payload. The script attempts to download content from a URL constructed using obfuscated strings, likely to fetch a second-stage payload. The use of Shell() and WScript.Shell indicates a clear intent to execute arbitrary code.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
2234935f9bddd4be0e4ed5b6361457f1f36b4e63171fda7d448245ec2421ccd6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3823 bytes

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