Office (OLE) / .XLS malware analysis — malicious · 29cc9bef2a4e6bba

MALICIOUS

Office (OLE) / .XLS

118.0 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel

MD5: 2ae85fe23af064f8ee7c6a994cdb75d7 SHA-1: f21558c63e44441ab7b64cc8d8534660f86087bd SHA-256: 29cc9bef2a4e6bba7026e67e54706257bdce61f1a7dffbc0d9ab38a352ba987d

222 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is an Excel spreadsheet containing a Workbook_Open VBA macro. This macro uses CreateObject and references Windows Script Host, indicating it likely executes a payload. The embedded URL is highly suspicious and likely serves as the download location for a second-stage payload. The macro's auto-execution upon opening the document is a common delivery technique.

Heuristics 7

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
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.

URL http://45.85.90.14/i88/Glkcsjejw.ex

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7a5210f3f3583722e90c69a24a28b03f345cd03be4f709090630cfff3176af48`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1194 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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