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

Static analysis result for SHA-256 fe2cb80f82938e7a…

MALICIOUS

Office (OLE) / .XLS

171.5 KB Created: 2013-02-19 16:21:18 Authoring application: Microsoft Excel
MD5: 036cd459767aba9e4dc67968421f9a15 SHA-1: 9f3e8c18e913e388af5b5f86f6de6f6ed34a4b3d SHA-256: fe2cb80f82938e7adf513b9d459d948dc02adb7035839d372f444e6216462673
360 Risk Score

Malware Insights

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

The sample is an Office XLS file containing VBA macros. Heuristics indicate the use of WScript.Shell and cmd.exe, suggesting script execution and potential payload delivery. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic strongly suggests a social engineering tactic to trick users into opening password-protected archives, which is a common method for evading gateway scanning. No specific family could be identified, but the techniques point towards a downloader or droppper.

Heuristics 9

  • 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
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Suspicious extracted artifact medium 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
4a8122bc60cca0d20723b6731b94a611fd171623d7616c3d81854340183ba0f5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 135887 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 7 shell/COM execution token(s).

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