Xls.Malware.Sload-7135989-0 RTF malware analysis — malicious · 298c2ae3ca43faab

MALICIOUS

RTF

789.6 KB Created: 2018-07-17 13:54:00 First seen: 2019-03-18

MD5: 53e592d0ed2274c7062aa5cf31ba1ca6 SHA-1: 88d3cc90348e9256f89f5b6d0a99891b5b161713 SHA-256: 298c2ae3ca43faabcd4fa4669fd93e249375efb6c7f7beac6f5e94649ddb9066

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 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_off00003c2d.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C2D	27195 bytes
SHA-256: `46f56a27519430b7ec47e03acd8b2a75ba5fd726fa37fd83c26ea094045a85b7`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_01_off00016899.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x16899	27195 bytes
SHA-256: `2b5a464758b55e1f6c47688d3fa872453fdea80262fdd0180743621dbfe17dad`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_02_off00029505.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x29505	27195 bytes
SHA-256: `682165faa4349a43286d7676a2ff51cf177af52cc852473854eb0dbc944d4786`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_03_off0003c171.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C171	27195 bytes
SHA-256: `64173cb232dd697265a4b494f7d235ffb4d5652ba6821568c2b0d7d3dd4eafa4`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_04_off0004eddd.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x4EDDD	27195 bytes
SHA-256: `a8507561c97139fde3c9ab675d5fff17ad1d03807a66136ca8c3dbe1b43aaf3a`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_05_off00062859.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x62859	27195 bytes
SHA-256: `da0c19b9b001b47a43aae468bdac1f290943623b9fb051bcbfa3651423f2ab20`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_06_off000754e4.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x754E4	27195 bytes
SHA-256: `36456cc7adeedb1c7e366322cc100568881f3248ea75e2782c3aa0b9cf807f36`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_07_off00088171.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x88171	27195 bytes
SHA-256: `fdaa6c56563d6fa21a5d76c21327801bb1686d44e1b9ad2720c74207991c2bed`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_08_off0009adfe.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x9ADFE	27195 bytes
SHA-256: `f4b6dced96360bca9b350afbde4a9ed8c1cb1120ce62f8cacc3a76177aa75ef8`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_09_off000ada8b.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xADA8B	27195 bytes
SHA-256: `45196a82c086b876fc5b9d9b6830cec9d34749ea314b9ff10ec0d34420555409`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely

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