Office (OLE) / .XLS malware analysis — malicious · ee2e455231053433

MALICIOUS

Office (OLE) / .XLS

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

MD5: 963e53696b551c1207809ed80ba88ca3 SHA-1: 63971744884181153eb06c2a1b8b7ffce0273847 SHA-256: ee2e455231053433cc4d8718e0fb69e0f11d9875c5d1d3b3eebba4426148fb6d

160 Risk Score

Malware Insights

MITRE ATT&CK

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

The Workbook_Open VBA macro is designed to execute a PowerShell command. This command is constructed by concatenating strings and includes a URL to download a second-stage executable. The script then attempts to execute this downloaded file. The use of ShellExecuteW in the VBA code further supports the execution of external commands.

Heuristics 5

Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `625004a54c5b78f709163f9c6adff8a5ac2ac9e07407f9da10ad603627137fe9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1850 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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