Office (OLE) / .PPT malware analysis — malicious · 179f113e9389ceb7

MALICIOUS

Office (OLE) / .PPT

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

MD5: 849109f398da43a11a1e88810b758c19 SHA-1: 608d528966f6e2160a884dcfd7118e4ab194352a SHA-256: 179f113e9389ceb7eb5ce7b403d7b73378cafc784b1a87970979f4388c9988f6

320 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is a PowerPoint file containing a VBA macro that executes a second-stage payload. The macro uses a split string to reassemble the string "WScript.Shell" and then calls CreateObject to instantiate it. It then constructs a URL by reversing a string and replacing specific characters, resulting in the URL "http://paths.pt.xoxfctvtctyctcy.d/p.d", which is likely used to download and execute a payload. The presence of the "Shell()" call and the "curl" command further indicate the execution of external commands.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Dangerous API name reassembled from split string literals critical OLE_VBA_SPLIT_KEYWORD_OBFUSCATION

VBA concatenates short string literals that reassemble a dangerous API/ProgID/LOLBin name (e.g. Scripting.FileSystemObject, WScript.Shell, powershell, URLDownloadToFile) which appears in no single literal. Splitting an API name across string concatenation is done only to evade keyword scanning.
ClamAV: Doc.Dropper.Agent-7788825-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Agent-7788825-0
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close 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.
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` `dd3e9935502f7ff00b2cb9a85e75dc7f59ca5147fba8b9d786ddfc58662175c4`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	546 bytes

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