Office (OLE) / .PPT malware analysis — malicious · f6263456f6be5d97

MALICIOUS

Office (OLE) / .PPT

137.5 KB Created: 2006-08-16 00:00:00 Authoring application: Microsoft Office PowerPoint

MD5: ba434fbdf17083edacf11531490bf75c SHA-1: 120d590c47c14b159edaa499c0a76d5ee0db73db SHA-256: f6263456f6be5d97a65e322b87f77f8527b75e8b81fd599d758beae5dffde1e5

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a PowerPoint document containing VBA macros. Critical heuristics indicate the use of the Shell() function and a character-shift decoder to execute a command. The Auto_Close macro is present, suggesting automatic execution upon closing the document. ClamAV detection confirms its malicious nature, identifying it as Doc.Malware.Valyria-10008087-0. The script likely downloads and executes a second-stage payload.

Heuristics 6

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
VBA character-shift decoded Shell command critical OLE_VBA_ASC_CHR_SHIFT_SHELL

VBA auto-exec macro stores an encoded command string, decodes it with a Mid/Asc/Chr character-shift loop, and passes the recovered text to Shell. This is a high-confidence command stager.
ClamAV: Doc.Malware.Valyria-10008087-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-10008087-0
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close 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.
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` `b0075359e7cd074ff3bbd06ac0fbb60fb27419e4a7e49149d7910dc29853c152`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4448 bytes

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