Office (OLE) malware analysis — malicious · 65be812d96997ed6

MALICIOUS

Office (OLE)

19.5 KB Created: 2010-07-22 06:36:53 Authoring application: Microsoft Excel

MD5: 417aa809292bf84ab5b71da278a6f1ad SHA-1: 7b340cb904f06848d3f2d712d24565622a15d682 SHA-256: 65be812d96997ed6d95a2474d5a59ed38c3f6ed367aa7134d733f0af5ebecc6b

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The file is an Excel spreadsheet containing a VBA macro, specifically an Auto_Open macro, which is a common technique for executing malicious code upon opening the document. The document body presents a plausible internal memo requesting procurement information, likely to trick the user into enabling macros. The presence of the Auto_Open macro indicates an attempt to download and execute a second-stage payload. The ClamAV detections further confirm its malicious nature.

Heuristics 4

ClamAV: Xls.Trojan.Escape-2 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Trojan.Escape-2
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
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` `b1dc6e799f600e1fe03c12ee5c927d9c20e72385747b65f9e697c96da1cbf849`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1767 bytes
Detection ClamAV: Xls.Trojan.Escape-1 Obfuscation or payload: unlikely

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