Office (OLE) / .XLS malware analysis — malicious · 8ae35dd4190944bb

MALICIOUS

Office (OLE) / .XLS

312.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: 5eedd5567923735f72db2067253b66fd SHA-1: ad2ea21f5086a6747a2985b36fdaeb3935a923e4 SHA-256: 8ae35dd4190944bbdb2ebedd286667ef5edb78f63c5707a734cc71a41b3d5fde

480 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1059.005 Visual Basic

The XLS file contains a Workbook_Open VBA macro that utilizes WScript.Shell to execute a PowerShell command. This indicates an attempt to download and execute a second-stage payload from the embedded URL. The macro's auto-execution and use of Shell() are critical indicators of malicious intent. While the embedded URL was flagged as benign, the overall behavior strongly suggests a downloader or initial access mechanism.

Heuristics 12

Shell() call in VBA critical OLE_VBA_SHELL

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

WScript.Shell usage
PowerShell reference in VBA critical OLE_VBA_PS

PowerShell reference in VBA
Reference to PowerShell high SC_STR_POWERSHELL

Reference to PowerShell
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.
Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND

Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
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 https://files.catbox.moe/mip25o.ps1

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `42cb198b41b4336ce628d2d746435e0f813c97d0b2f02fca65701c71956d53c7`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4803 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 17 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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