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

Static analysis result for SHA-256 e547f7c290ea95ec…

MALICIOUS

Office (OLE) / .XLS

286.0 KB Created: 2018-12-06 20:43:11 Authoring application: Microsoft Excel
MD5: c51e6687036e931766c3e3cbdbbd008a SHA-1: cd7bb3b8e27f9982dd8678dd42f16798ce5fa1fe SHA-256: e547f7c290ea95ecc61eaa5ae61a957e9991e0b0fb3fa11d6d18dc12846a3ccc
340 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

This XLS file contains VBA macros that are automatically executed upon opening, specifically triggered by the Workbook_Open event. The macros utilize WScript.Shell to execute commands, indicating a likely downloader or dropper functionality. The presence of Shell() and WScript.Shell usage, along with the auto-execution of VBA p-code, strongly suggests the execution of a second-stage payload.

Heuristics 8

  • 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
  • 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.
  • Suspicious extracted artifact high 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
6b376eeb28ce23a50ece2cfc7fead1439e3334aa523515dd8a4d64440146b9fe		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12556 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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