Xls.Malware.Sload-7135989-0 RTF malware analysis — malicious · c87d605f7534a924

MALICIOUS

RTF

741.0 KB Created: 2018-04-28 01:23:00 First seen: 2018-05-18

MD5: 8dff7f2c1c975b4f47d8f2a94fb15274 SHA-1: d9250a700d9ce06b45ad067e2d36099f8ecaa42f SHA-256: c87d605f7534a9245e735761be11aadf77a6e203202a0135cce2e089b35b07e9

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: Doc.Dropper.Agent-6412232-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.Agent-6412232-1
\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 10 \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 10

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000291f.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x291F	25147 bytes
SHA-256: `1302342e4ed8c3281bf414f1862f5ffa6009b6741709a16e1da6ebf1815cbd9f`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_01_off0001450a.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1450A	25147 bytes
SHA-256: `7817442faf70a62084389530bea309f47731b7519e42c53bf652018aa4eb2f12`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_02_off00026171.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x26171	25147 bytes
SHA-256: `825ac8a79cf3ece3adf531d7012bcb05c16ed14e09e5b0077fe348c5b3c19e73`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_03_off00037dda.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x37DDA	25147 bytes
SHA-256: `071b4cfb940729a453e17cbeb2986f61095b9b1f4b9b5c7bca87aa1e4b569c73`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_04_off00049a43.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x49A43	25147 bytes
SHA-256: `d7c7af30ac8c0691db50bc3c9971841ed18c679a6cede4f5e75e3c52d05d4324`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_05_off0005b6ac.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x5B6AC	25147 bytes
SHA-256: `6fec776d944915aa4585ed8173444a704c06b8377888b414264994350cc097db`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_06_off0006d315.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x6D315	25147 bytes
SHA-256: `ea425ba87765aea9301d937387ee927172bd5b06355b0c2068cc2e316321ea22`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_07_off0007ef7e.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7EF7E	25147 bytes
SHA-256: `e1d15bb9453854282598629b7fde7d2f5b5b784e408482945aba6badb47edc70`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_08_off00090be7.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x90BE7	25147 bytes
SHA-256: `5428fd9f35d3f127b268388b9ff8922f5202509b6184059f77bf8b54b5f8bbb3`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_09_off000a2850.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xA2850	25147 bytes
SHA-256: `2b9dca44f17a994bf2b49adcbe600635e7a3a1b00dd289119f4b46918edeb2a4`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely

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