Office (OLE) / .XLS malware analysis — malicious · f9f305728d2fca50

MALICIOUS

Office (OLE) / .XLS

19.5 KB

MD5: 768340224d23f8bffa1fe956d5e5a7d8 SHA-1: 300b8d7a9f312aff061b846337f860048e440362 SHA-256: f9f305728d2fca504cc323840f259261b2fa043e7801f5f15ae6d2b9eef4e46b

500 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical OLE_VBA_SHELL and OLE_VBA_PS heuristics indicate that VBA macros are being used to execute PowerShell commands. The OLE_VBA_OBFUSCATED_SHELL_URL heuristic specifically points to an obfuscated shell command containing a URL, which is reconstructed as http://77.83.39.207/RAY/Y1.ps1. This script likely downloads and executes a second-stage payload, a common technique for initial access.

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
Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL

VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
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.
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://77.83.39.207/RAY/Y1.ps1

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `c9eeb415209b4beecf5b4198cd3ea150ebc71bb496997077e88e21bbfed489ba`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2710 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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