Xls.Malware.Sload-7135989-0 RTF malware analysis — malicious · e429670fe4d92460

MALICIOUS

RTF

740.9 KB Created: 2018-05-14 08:58:00 First seen: 2018-05-18

MD5: cdfb02757c7d2777da528310df0535e3 SHA-1: 01d35116849a2cb2a72b23dbbf515596a386a8f0 SHA-256: e429670fe4d92460878a28adb68ac882b7f4e774a6fb4470acda64dcc9d4f4e5

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_off0000291c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x291C	25147 bytes
SHA-256: `fdcef00ca29d696f6238b3781cc665cd8f88952c1c449754c9d86bf88f5fba59`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_01_off00014506.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x14506	25147 bytes
SHA-256: `0cb48c74d9aee1172415b71b079ada7c0770a168106bb21efb6c659ab4037b9e`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_02_off0002616c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x2616C	25147 bytes
SHA-256: `6adfe0c44c5acac76b47ac7205e62e6be1a1cf6478565698cb322715e87dac1a`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_03_off00037dd4.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x37DD4	25147 bytes
SHA-256: `2793b40db627aca3061968131e44ff4bffefe5ba6783c5d9b5ba7dccba00e3f5`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_04_off00049a3c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x49A3C	25147 bytes
SHA-256: `b0ba33176f418efdc40f33a371df1c4465164c08c942b43ec14e3bdcf2b5fa55`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_05_off0005b6a4.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x5B6A4	25147 bytes
SHA-256: `3fd5f04943127189be18d07a6adde73b393c18bce246e8fd6ad4af7686ec4f3c`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_06_off0006d30c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x6D30C	25147 bytes
SHA-256: `a7862dc2e5190c08fd46c8e1d44f00602bb5d5bb0b35b2493b33a45670562848`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_07_off0007ef74.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7EF74	25147 bytes
SHA-256: `2667f8174e1f2f6ee042e575d39ed82d8a6b273e08eb75bc0f79e93bbbaf6994`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_08_off00090bdc.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x90BDC	25147 bytes
SHA-256: `48d9e93e1c665bf197e1fb94f61e47d60571ee4b587bac6e29898c4bf72ad62a`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely
`objdata_09_off000a2844.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xA2844	25147 bytes
SHA-256: `a0c0c39e980dec568bb02b4e9fef57f660f3dda6be08fbcf1056c700d40538b5`
Detection ClamAV: Doc.Dropper.Agent-6412232-1 Obfuscation or payload: unlikely

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