Office (OLE) / .XLSX malware analysis — malicious · ce70198f67967c98

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 3007559317942a0ec2ed0f8280b2271c SHA-1: 345c4288e46efe06b4f13335d00eb5d383597cba SHA-256: ce70198f67967c9804b09c7059293027dcaaccfae8bf8ea2515c0343947ad8ed

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains VBA macros that execute Windows Script Host (Wscript.Shell) to run a VBScript and a batch file. The VBScript is constructed by concatenating strings, resulting in the execution of 'c:\programdata\yhjlswle.vbs'. The batch file 'c:\programdata\ughldskbhn.bat' is also executed. The DOC BODY contains obfuscated commands and URLs that appear to be part of a downloader mechanism, including reconstructed URLs like 'https://nabajyotiundation.com/da8uc7jo/4Za/'. The presence of Wscript.Shell and the execution of external scripts indicate a downloader or dropper functionality.

Heuristics 7

ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7a075e02dc1e88807280b9b84946715e79a3c091d50391301434649c77b78ea1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	12808 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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