Xls.Malware.Sload-7135989-0 RTF malware analysis — malicious · 1259ee90dfbfd093

MALICIOUS

RTF

739.3 KB Created: 2018-07-13 12:57:00 First seen: 2019-05-16

MD5: a1bf81348819dd7904fea2029150e0fa SHA-1: 782fa11918cf59bd1c871d19f5a759dde17d8db3 SHA-256: 1259ee90dfbfd09317a198bce3c1e0473bf3ea43601d389c60fe6ce930c28dea

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_off00003c40.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C40	24635 bytes
SHA-256: `5f0081617ef39983bb3c91817f5428033921f9f54af26de9d53c89b2e68976ea`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_01_off00015486.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x15486	24635 bytes
SHA-256: `94506b5eaa1cfe007320d82afa1ee9ee8f3fd3e0f5b8020e5f2d90b327d38e2a`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_02_off00026ccc.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x26CCC	24635 bytes
SHA-256: `90e72921b089aca1f04ca1a756de67d0546c6004db7752bc3b354bd4f3e58cfa`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_03_off00038512.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x38512	24635 bytes
SHA-256: `87cbb181b51a685e727ef0c5b067aa22f02ed0dbf888552f297e55d813193502`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_04_off00049d58.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x49D58	24635 bytes
SHA-256: `6cc235850e7bb48c0ce2683ab593352f618e3760961baed3e14508fa43aae741`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_05_off0005c3ba.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x5C3BA	24635 bytes
SHA-256: `b2ef44fae175483e53856be8e17a3d6b7976118b2ea9e349b82569d0ae63bb4f`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_06_off0006dc1e.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x6DC1E	24635 bytes
SHA-256: `9cc9bc1573cd03e030ab4d8813df175586c499a514c40009e7a862b8f3f42190`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_07_off0007f484.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7F484	24635 bytes
SHA-256: `a24a98da81a343d58e724d42f320ed6add4d7fafe72730a207756beb55473520`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_08_off00090cea.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x90CEA	24635 bytes
SHA-256: `ab04e368533ef596b4bb951a5e0b9401fbf95a55e4da51a4a6ae7a66bbb0151a`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_09_off000a2550.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xA2550	24635 bytes
SHA-256: `198d62597e3813258a0279209966593876b9e83cfa587ed72b7d7fab307d050b`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely

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