MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 f57a3f475e7eadf3c090159567858ca5f13323d32300214a9032e44105baa8b3. 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
QuasarRAT
Vendor detections: 10
Maldoc score: 23
| SHA256 hash: | f57a3f475e7eadf3c090159567858ca5f13323d32300214a9032e44105baa8b3 |
|---|---|
| SHA3-384 hash: | 4a2a01aeead8656f07f2f465559b4d45aee8d539ca6ed85895aa8b7a55d5d50a7b5115597a73b4a5aba4ffdd88c24e2f |
| SHA1 hash: | 9886764cac21fa8421d8ab2c371d9a6fa4ad8aeb |
| MD5 hash: | 86dd580df1bbb186f9e99983468fece2 |
| humanhash: | michigan-bulldog-lion-oklahoma |
| File name: | SecuriteInfo.com.VB.Trojan.Valyria.3530.8728.23859 |
| Download: | download sample |
| Signature | QuasarRAT |
| File size: | 177'152 bytes |
| First seen: | 2021-10-20 02:13:27 UTC |
| Last seen: | Never |
| File type: |  xlsx |
| MIME type: | application/vnd.ms-excel |
| ssdeep | 3072:zixEtjPOtioVjDGUU1qfDlaGGx+cL2QnAy8fbFW66CQt+RmaiIT54rLyBm82wNS5:uxEtjPOtioVjDGUU1qfDlavx+W2QnAto |
| TLSH | T14F04BE56B691E902C99547324CD6C2E52B23FD139E62874B324CF31E2F73BA4CD82657 |
| Reporter |  SecuriteInfoCom |
| Tags: | QuasarRAT xlsx |
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: 23 |
OLE dump
MalwareBazaar was able to identify 19 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| 1 | 107 bytes | CompObj |
| 2 | 244 bytes | DocumentSummaryInformation |
| 3 | 208 bytes | SummaryInformation |
| 4 | 146506 bytes | Workbook |
| 5 | 572 bytes | _VBA_PROJECT_CUR/PROJECT |
| 6 | 128 bytes | _VBA_PROJECT_CUR/PROJECTwm |
| 7 | 951 bytes | _VBA_PROJECT_CUR/VBA/Module1 |
| 8 | 977 bytes | _VBA_PROJECT_CUR/VBA/Sheet1 |
| 9 | 977 bytes | _VBA_PROJECT_CUR/VBA/Sheet2 |
| 10 | 977 bytes | _VBA_PROJECT_CUR/VBA/Sheet3 |
| 11 | 9041 bytes | _VBA_PROJECT_CUR/VBA/ThisWorkbook |
| 12 | 4627 bytes | _VBA_PROJECT_CUR/VBA/_VBA_PROJECT |
| 13 | 1698 bytes | _VBA_PROJECT_CUR/VBA/__SRP_0 |
| 14 | 393 bytes | _VBA_PROJECT_CUR/VBA/__SRP_1 |
| 15 | 456 bytes | _VBA_PROJECT_CUR/VBA/__SRP_2 |
| 16 | 510 bytes | _VBA_PROJECT_CUR/VBA/__SRP_3 |
| 17 | 136 bytes | _VBA_PROJECT_CUR/VBA/__SRP_4 |
| 18 | 104 bytes | _VBA_PROJECT_CUR/VBA/__SRP_5 |
| 19 | 611 bytes | _VBA_PROJECT_CUR/VBA/dir |
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 | Workbook_Open | Runs when the Excel Workbook is opened |
| IOC | shell32.dll | Executable file name code and P-code are different, this may have been used to hide malicious code |
| Suspicious | Environ | May read system environment variables |
| Suspicious | open | May open a file |
| Suspicious | vbNormalFocus | May run an executable file or a system command |
| Suspicious | ShellExecuteA | May run an executable file or a system command |
| Suspicious | shell32 | May run an executable file or a system command |
| Suspicious | Lib | May run code from a DLL |
| Suspicious | URLDownloadToFileA | May download files from the Internet |
| Suspicious | Chr | May attempt to obfuscate specific strings (use option --deobf to deobfuscate) |
| Suspicious | StrReverse | May attempt to obfuscate specific strings (use option --deobf to deobfuscate) |
| 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
# of uploads :
1
# of downloads :
224
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
f57a3f475e7eadf3c090159567858ca5f13323d32300214a9032e44105baa8b3.zip
Verdict:
No threats detected
Analysis date:
2021-10-20 03:12:52 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
QuasarRAT
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Document image
Image:
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
evasive macros macros-on-open vbastomped
Result
Verdict:
MALICIOUS
Link:
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Macro Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
Macro with DLL Reference
Detected macro logic that will load additional functionality from Dynamically Linked Libraries (DLLs). While not explicitly malicious, this is a common tactic for accessing APIs that are not otherwised exposed via Visual Basic for Applications (VBA).
Document With Minimal Content
Document contains less than 1 kilobyte of semantic information.
Result
Threat name:
AveMaria UACMe
Detection:
malicious
Classification:
expl.evad.phis.troj.spyw
Score:
100 / 100
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to hide user accounts
Creates an undocumented autostart registry key
Document contains an embedded VBA macro which may execute processes
Document contains an embedded VBA macro with suspicious strings
Document contains an embedded VBA with hexadecimal encoded strings
Document contains VBA stomped code (only p-code) potentially bypassing AV detection
Document exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Document exploit detected (UrlDownloadToFile)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Hides user accounts
Increases the number of concurrent connection per server for Internet Explorer
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Office process drops PE file
Sigma detected: MS Office Product Spawning Exe in User Dir
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file access)
Writes to foreign memory regions
Yara detected AveMaria stealer
Yara detected UACMe UAC Bypass tool
Behaviour
Behavior Graph:
Threat name:
Script-Macro.Trojan.Woreflint
Status:
Malicious
First seen:
2021-10-20 02:14:04 UTC
AV detection:
19 of 43 (44.19%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
8/10
Tags:
macro macro_on_action
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Office loads VBA resources, possible macro or embedded object present
Malware family:
xRAT
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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