Malicious Office (OOXML) / .XLSM — malware analysis report

Static analysis result for SHA-256 fa8676cc350ff2ed…

MALICIOUS

Office (OOXML) / .XLSM

21.6 KB
MD5: 3d7d43c548afbf75ae7e43d35a7837a7 SHA-1: 20648cf50e0833efb1d0172af736ae485ee61c2a SHA-256: fa8676cc350ff2edb818d3c0f88ea94d473330077974e5d8b9f6c0d3fe4b4a75
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The document contains VBA macros that leverage PowerShell to download an executable file from 'http://185.29.11.32/crypwarzne.exe' and save it as 'C:\Users\Public\Documents\epbaizqdd.exe'. The script then immediately executes the downloaded file. This indicates a downloader or droppper functionality.

Heuristics 6

  • ClamAV: Xls.Malware.Sagent-10035294-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Malware.Sagent-10035294-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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://185.29.11.32/crypwarzne.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c2cd0358ca61aab7e5f068df666b72a9ba6d5dbdfccb1b3f56d311a522628838		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1310 bytes
vbaProject_00.bin
b8deb5e7b327d01b0c29ff93f17b921e1ebca80a086717b2e3d858124045f761		 vba-project OOXML VBA project: xl/vbaProject.bin 5120 bytes
Detection
ClamAV: Xls.Malware.Sagent-10035294-0
Obfuscation or payload: unlikely

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