Office (OLE) / .PPT malware analysis — malicious · 36776dd216f98127

MALICIOUS

Office (OLE) / .PPT

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

MD5: 3f3e4894ee431de2d81792fe481e3666 SHA-1: 0590997216a4621b75bb80f9f28f62268926d88c SHA-256: 36776dd216f98127768c1a68a63aa50353e81aa50a641c2e936361f65c9c7911

282 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a PowerPoint file containing VBA macros. Critical heuristics indicate the use of the Shell() function and character-shift decoding to execute commands. The Auto_Close macro is present, suggesting automatic execution upon file closure. ClamAV detected this as Doc.Malware.Valyria-10008087-0, confirming its malicious nature. The VBA code 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` `41598bf028f1bda3445a631a65af59f45ea651129b2b2a753908263766dbc6ca`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4446 bytes

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