Xls.Malware.Sload-7135989-0 — RTF malware analysis

Static analysis result for SHA-256 0bd591f27a22c998…

MALICIOUS

RTF

495.4 KB Created: 2018-06-07 13:04:00 First seen: 2019-04-17
MD5: 8a872228dfcc8b3060c3d694d36e4976 SHA-1: 293ac3d44c1d0f61952c2ddc0284db9df28a0ec8 SHA-256: 0bd591f27a22c998555a6137cd0fdcf6ff214f971d0499da17900932f426a99d
242 Risk Score

Malware Insights

Xls.Malware.Sload-7135989-0 · confidence 95%

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

The RTF file contains multiple OLE objects, with heuristics indicating ".objupdate" forces OLE activation and the presence of Composite Monikers. ClamAV signatures identify the embedded content as Xls.Malware.Sload-7135989-0, suggesting an exploit targeting spreadsheet functionality. The primary attack vector is likely spearphishing, with the embedded OLE object serving as the malicious payload.

Heuristics 6

  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • ClamAV: Xls.Malware.Sload-7135989-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Malware.Sload-7135989-0
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 5 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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://schemas.microsoft.com/office/word/2003/wordml In RTF body

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00003d11.bin rtf-objdata-decoded RTF \objdata at offset 0x3D11 32827 bytes
SHA-256: 373cc29ce6e308ab79e0d4df5fae93c90b74ebde9d9c6853b681b3144ab9b1d2
Detection
ClamAV: Xls.Malware.Sload-7135989-0
Obfuscation or payload: unlikely
objdata_02_off0002eedb.bin rtf-objdata-decoded RTF \objdata at offset 0x2EEDB 32827 bytes
SHA-256: 030d7aa1ed7bf66456030f2531e944ba24689637becabcf61b8f03c85b5f201c
Detection
ClamAV: Xls.Malware.Sload-7135989-0
Obfuscation or payload: unlikely

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