Office (OLE) / .XLS malware analysis — malicious · a987e9f4a56be37f

MALICIOUS

Office (OLE) / .XLS

870.5 KB Created: 2008-05-22 02:03:45 Authoring application: Microsoft Excel

MD5: 0227ba1491c2dcb1187114aa437da1a9 SHA-1: 589703e81bbd888eef629828a92c1e29b675d3d9 SHA-256: a987e9f4a56be37fdfbb2b10981d11296dcf521106f921556553aa27c15dc0c3

260 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains VBA macros, including an Auto_Open macro that utilizes ShellExecute and GetObject, indicating an attempt to execute code. The 'Password-protected archive handoff' heuristic suggests the document's purpose is to lure the user into providing a password for a seemingly legitimate archive, which is a common tactic for delivering malware. No specific family could be identified, but the techniques suggest a downloader or dropper.

Heuristics 8

Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
GetObject call high OLE_VBA_GETOBJ

GetObject 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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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.yokogawa.co.jp/cp/procurement/cp-procurement-download.htm

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `10be4553b8442c7714b638fbf50b8df399f8a1a3f45fde4dea6599e704a8b413`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	244655 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 shell/COM execution token(s). Carved artifact contains 153 Chr/ChrW string-construction calls.

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