Xls.Malware.Sload-7135989-0 RTF malware analysis — malicious · 5c24bb3cdd8a7b54

MALICIOUS

RTF

740.9 KB Created: 2018-04-30 11:41:00 First seen: 2018-06-30

MD5: bea9156e0adabfa9d5e52d60542d9622 SHA-1: a92e494467660ab0af8270f84502ddb41ff51e5e SHA-256: 5c24bb3cdd8a7b544d7d8c91b9331714ea7b27c6da86cfeadd859d6bf2e6c001

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_off0000291e.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x291E	25147 bytes
SHA-256: `3616ad7abe59432be6f7b587a5da8e2ad9f719dd15d616004b9aba85daa44ac6`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_01_off00014508.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x14508	25147 bytes
SHA-256: `6f408a8d1d6d86f80c1a79bc2d3d8ab35a832322b18d68cc988c1f8c2d020720`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_02_off0002616e.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x2616E	25147 bytes
SHA-256: `a2dd2a0b2301f6420ac7570aee225b7d3d1ade40e6212420d2eb41b735ef590d`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_03_off00037dd6.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x37DD6	25147 bytes
SHA-256: `82b7ee1d36ce5d9ebb8cd8421a7d39fe9cee27f5418325decfe6252944e3c20e`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_04_off00049a3e.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x49A3E	25147 bytes
SHA-256: `6f7600936cd8e194e6bcae267ffe8acc33fd0da002dc5912ac763c4a9c60bf73`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_05_off0005b6a6.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x5B6A6	25147 bytes
SHA-256: `8f086dfbf4bdc9593e20ade97dca07c2968a85dca71c187a2b5c98c6e0ee3a6f`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_06_off0006d30e.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x6D30E	25147 bytes
SHA-256: `5ecc539246f1d4319511ea7a697708005215d893d1f179eb1d114da8e1e422f8`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_07_off0007ef76.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7EF76	25147 bytes
SHA-256: `ce225f5b72a76ff8ab2b911f4055c5da35bdd958585a1740f8e01dafb6e564fa`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_08_off00090bde.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x90BDE	25147 bytes
SHA-256: `019b7eacf117f26c3d93e442a7e106885d035e03088bc3c05056c389a5e2b0f6`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_09_off000a2846.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xA2846	25147 bytes
SHA-256: `66c93cf1c7b9e46c389ed9ac6650d509b8fa28f6870ef9993fcf10acbf7cb893`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely

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