MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 b861535f129ce740a26f50318c44e0405be62eaaa21f6366ec64368074d966cf. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.
Database Entry
SilentBuilder
Vendor detections: 8
Maldoc score: 9
| SHA256 hash: | b861535f129ce740a26f50318c44e0405be62eaaa21f6366ec64368074d966cf |
|---|---|
| SHA3-384 hash: | 782475c044cc498e50b319eafba5904ee55f2ed35b781a48f57d1945523b7d5c8dfe1bbf3099d1dcfeb894e96e360c21 |
| SHA1 hash: | 562b15600872a0f823c75a4015daa3d0bd6b2522 |
| MD5 hash: | 1ea1ef7c139f68cca609e9ec3a70b5ff |
| humanhash: | yankee-shade-maine-edward |
| File name: | SecuriteInfo.com.Heur.22173.4129 |
| Download: | download sample |
| Signature | SilentBuilder |
| File size: | 169'472 bytes |
| First seen: | 2021-02-18 20:16:46 UTC |
| Last seen: | Never |
| File type: | |
| MIME type: | application/vnd.ms-excel |
| ssdeep | 3072:XScKoSsxzNDZLDZjlbR868O8KlVH3jiKq7uDphYHceXVhca+fMHLtyeGxcl8OUMX:CcKoSsxzNDZLDZjlbR868O8KlVH3jiKi |
| TLSH | 12F3CF5F7659CC52DA48033454E38BE26317FC9AABB387867A4CF6262FB06D04E1A507 |
| Reporter | |
| Tags: | SilentBuilder |
Office OLE Information
This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.
OLE id
| Maldoc score: 9 |
| Application name is Microsoft Excel |
| Office document is in OLE format |
OLE dump
MalwareBazaar was able to identify 3 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| 1 | 4096 bytes | DocumentSummaryInformation |
| 2 | 4096 bytes | SummaryInformation |
| 3 | 158489 bytes | Workbook |
OLE vba
MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:
| Type | Keyword | Description |
|---|---|---|
| AutoExec | Auto_Open | Runs when the Excel Workbook is opened |
| Hex String | 54TT | 35345454 |
| Suspicious | FORMULA.FILL | May modify Excel 4 Macro formulas at runtime |
| Suspicious | EXEC | May run an executable file or a system |
| Suspicious | Hex Strings | Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
| Suspicious | Base64 Strings | Base64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
Intelligence
File Origin
Vendor Threat Intelligence
Result
Behaviour
Result
Payload URLs
Document image
Result
Details
Result
Signature
Behaviour
Result
Behaviour
Malware Config
142.202.191.164:443
193.8.194.96:443
45.155.173.242:443
108.170.20.75:443
185.163.45.138:443
94.140.114.136:443
134.119.186.202:443
200.52.147.93:443
45.230.244.20:443
186.250.157.116:443
186.137.85.76:443
36.94.62.207:443
182.253.107.34:443
YARA Signatures
MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.
| Rule name: | Email_stealer_bin_mem |
|---|---|
| Author: | James_inthe_box |
| Description: | Email in files like avemaria |
| Rule name: | IPPort_combo_mem |
|---|---|
| Author: | James_inthe_box |
| Description: | IP and port combo |
| Rule name: | multiple_concats_in_excel4_exec_enjoy_the_silence |
|---|---|
| Author: | Will Metcalf |
| Description: | Behold The Great And Powerful Match Iterator. Multiple Concats with register Function SILENT BUILDER EDITION |
| Reference: | https://blog.reversinglabs.com/blog/excel-4.0-macros |
| Rule name: | Select_from_enumeration |
|---|---|
| Author: | James_inthe_box |
| Description: | IP and port combo |
| Rule name: | SharedStrings |
|---|---|
| Author: | Katie Kleemola |
| Description: | Internal names found in LURK0/CCTV0 samples |
| Rule name: | SUSP_Excel4Macro_AutoOpen |
|---|---|
| Author: | John Lambert @JohnLaTwC |
| Description: | Detects Excel4 macro use with auto open / close |
| Rule name: | UAC_bypass_bin_mem |
|---|---|
| Author: | James_inthe_box |
| Description: | UAC bypass in files like avemaria |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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