Xls.Malware.Sload-7135989-0 RTF malware analysis — malicious · 342300f4fd02d031

MALICIOUS

RTF

515.7 KB Created: 2018-06-19 10:53:00 First seen: 2018-07-04

MD5: ea1d2342f73d62e6b454b6bc3645f7cd SHA-1: 63694ab0e718d84b68c3e294eadc2255e8a562b1 SHA-256: 342300f4fd02d031f56642644a9a7b1bbfe83fe1ac893b4341a04f91c0365155

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.Generic-6834349-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Generic-6834349-0
\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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000049fc.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x49FC	35899 bytes
SHA-256: `13633cb71acbef17f41f034fcb09d11825586f063afb49feafc3a117c6139543`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_01_off0001ba46.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1BA46	35899 bytes
SHA-256: `62a8bb89780901f40565c346e01acc4900d7ae1b44306b0ea5f491e9b13825f2`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_02_off00032b97.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x32B97	35899 bytes
SHA-256: `d88fa8e6a1f9a6b86a0d51a42ebcb3a88587a7a5087dbd93f82aab5102ada562`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_03_off00049ce8.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x49CE8	35899 bytes
SHA-256: `0119115eea20ab86cda8d0d4888afb21c9a5d61c97d94fae7e068330cd3657de`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_04_off00060e39.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x60E39	35899 bytes
SHA-256: `bd3fbc002b355a1801151a16bc4b581b7558f82740f11600c2fe420a7b8bf577`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely

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