Office (OLE) / .XLSX malware analysis — malicious · ef51b467e3757882

MALICIOUS

Office (OLE) / .XLSX

30.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2022-06-15

MD5: d12f134afcd979f5ac8f720d94e837f9 SHA-1: 384f3b48901cf766d823398a6590b0f429467f0d SHA-256: ef51b467e375788258e1c75a436a584cacffa71a42aa96f0a7f3420b77b5dcd5

242 Risk Score

Malware Insights

MITRE ATT&CK

T1218.010 System Binary Proxy Execution: Regsvr32 T1059.005 Command and Scripting Interpreter: Visual Basic T1059.001 Command and Scripting Interpreter: PowerShell

The VBA macro within the Excel file contains a string that, when executed via `rundll32`, launches `mshta.exe` to download and execute a payload from the URL `http://www.asianexportglass.shop/p/11.html`. This is a common technique for delivering secondary malware payloads. The presence of `mshta.exe` and the URL strongly indicate a malicious intent to download and execute further stages.

Heuristics 7

LOLBin reference in VBA critical OLE_VBA_LOLBIN

LOLBin reference in VBA
ClamAV: Xls.Malware.Valyria-10002968-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Valyria-10002968-0
Reference to mshta.exe high SC_STR_MSHTA

Reference to mshta.exe
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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.
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://www.asianexportglass.shop/p/11.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `6aca677e5af809a0f226f21fb633bf7c58171f7beb3a847e7474f05149ef0cb0`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	935 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).

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