Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 c3238057b26032ef…

MALICIOUS

Office (OOXML)

11.0 KB Created: 2017-11-17 10:35:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2017-11-20
MD5: 54cd11809011d1bb5713331fd6e46250 SHA-1: 8911e3819101f374a31d9532f0034c2cf0629450 SHA-256: c3238057b26032efffb59f6ba0d24980bf962b546b1c7cf13c412c2dbce84f21
142 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample utilizes a malicious DDE command embedded within the document body to execute cmd.exe. This command then invokes PowerShell to download a PNG file from 'http://b7center.com/bagratios.png' and save it as '%TMP%\jkh.exe'. Finally, it executes the downloaded file, indicating a multi-stage attack designed to deliver a secondary payload.

Heuristics 4

  • Malicious DDE command critical OOXML_DDE_MALICIOUS
    DDE field in word/document.xml launches a dangerous executable: \\system32\\cmd.exe
  • Word field-chain (SET/REF) co-located with DDE high OOXML_FIELD_SET_REF_CHAINING
    2 SET/REF variable pair(s) co-occur with DDE field(s) in word/document.xml
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://b7center.com/bagratios.png In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)

Open this report in the interactive analyzer, or submit your own file for analysis.