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

Static analysis result for SHA-256 ba2a7bb836087475…

MALICIOUS

Office (OLE) / .XLS

92.5 KB Created: 2020-03-31 12:44:29 Authoring application: Microsoft Excel
MD5: 437145f1857866db0e7673648adb5766 SHA-1: f60d1517b20dda9f3f26673f1331a5abb0b30249 SHA-256: ba2a7bb8360874758eace96f834b60c1f0f43be5724fab00ffd8027daddab372
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059.001 PowerShell T1059.003 Windows Command Shell

The sample is an Excel 4.0 macro sheet (XLM) that contains instructions to enable content, a common lure for users to bypass macro security. It references ShellExecute and URLDownloadToFile APIs, indicating it is designed to download and execute a second-stage payload. The embedded URLs `http://fikima.com/axel.exe` and `http://fikima.com/axel.exe~` are likely the locations of this payload.

Heuristics 5

  • Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD
    Reference to URLDownloadToFile API
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://fikima.com/axel.exe
    • http://fikima.com/axel.exe~

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