MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 66a0caa01b244b734d96992a5e85367275bbc5efaa390d871f842079b9c88901. 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: 12
Maldoc score: 29
| SHA256 hash: | 66a0caa01b244b734d96992a5e85367275bbc5efaa390d871f842079b9c88901 |
|---|---|
| SHA3-384 hash: | 2d0bca3970659b3832707884d8edb8329cb964405fe5ab2135781aa33f24c982fa58a2dfb9c6c32b099051393ce860b6 |
| SHA1 hash: | 639b952d87f6f339f0d6e35f904a8f421185a708 |
| MD5 hash: | 21808baf875eedac696b68deb98d5b5a |
| humanhash: | papa-winter-yellow-eight |
| File name: | Pago.xls |
| Download: | download sample |
| Signature | QuasarRAT |
| File size: | 175'616 bytes |
| First seen: | 2022-01-01 08:25:52 UTC |
| Last seen: | Never |
| File type: |  xls |
| MIME type: | application/vnd.ms-excel |
| ssdeep | 3072:fXZ+RwPONXoRjDhIcp0fDlaGGx+cL26nAji4VYhP7QSuFDxEVbuHsQn2KsO37KDT:PZ+RwPONXoRjDhIcp0fDlavx+W26nAuH |
| TLSH | T13604DF927681C415CA9903360EE3C6CA3B63FD549EBB474B3564F31E6E77790CE4222A |
| Reporter |  abuse_ch |
| Tags: | QuasarRAT RAT xls |
abuse_ch
QuasarRAT payload URLs:https://www.js-hurling.com/rfvtrtbbyrtgrtgroipoyjg/yfrehyhetyuityhgnjm.exe
https://www.js-hurling.com/bstylh/ConsoleApp3.jpeg
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: 29 |
OLE dump
MalwareBazaar was able to identify 17 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| 1 | 114 bytes | CompObj |
| 2 | 244 bytes | DocumentSummaryInformation |
| 3 | 216 bytes | SummaryInformation |
| 4 | 138355 bytes | Workbook |
| 5 | 645 bytes | _VBA_PROJECT_CUR/PROJECT |
| 6 | 128 bytes | _VBA_PROJECT_CUR/PROJECTwm |
| 7 | 825 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 | 13417 bytes | _VBA_PROJECT_CUR/VBA/ThisWorkbook |
| 12 | 7235 bytes | _VBA_PROJECT_CUR/VBA/_VBA_PROJECT |
| 13 | 2090 bytes | _VBA_PROJECT_CUR/VBA/__SRP_0 |
| 14 | 325 bytes | _VBA_PROJECT_CUR/VBA/__SRP_1 |
| 15 | 556 bytes | _VBA_PROJECT_CUR/VBA/__SRP_2 |
| 16 | 582 bytes | _VBA_PROJECT_CUR/VBA/__SRP_3 |
| 17 | 604 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 |
| Suspicious | Environ | May read system environment variables |
| Suspicious | open | May open a file |
| Suspicious | Write | May write to a file (if combined with Open) |
| Suspicious | adodb.stream | May create a text file |
| Suspicious | SaveToFile | May create a text file |
| Suspicious | Shell | May run an executable file or a system command |
| Suspicious | vbNormalFocus | May run an executable file or a system command |
| Suspicious | WScript.Shell | May run an executable file or a system command |
| Suspicious | CreateObject | May create an OLE object |
| Suspicious | Shell.Application | May run an application (if combined with CreateObject) |
| Suspicious | microsoft.xmlhttp | May download files from the Internet |
| Suspicious | Chr | 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 :
296
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Pago.xls
Verdict:
No threats detected
Analysis date:
2022-01-01 08:27:18 UTC
Tags:
macros macros-on-open
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
True
Detection:
QuasarRAT
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
DNS request
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Sending an HTTP GET request
Unauthorized injection to a recently created process
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Document image
Image:
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
macros macros-on-open valyria
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 with File System Write
Detected macro logic that can write data to the file system.
Shell.Application Object
Detected the instantiation of Shell Application object within the macro.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
Document With Minimal Content
Document contains less than 1 kilobyte of semantic information.
Result
Threat name:
Quasar
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Document contains an embedded VBA macro with suspicious strings
Document contains an embedded VBA with functions possibly related to ADO stream file operations
Document contains an embedded VBA with functions possibly related to HTTP operations
Document contains an embedded VBA with functions possibly related to WSH operations (process, registry, environment, or keystrokes)
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)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
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)
May check the online IP address of the machine
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Office process drops PE file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Sigma detected: MS Office Product Spawning Exe in User Dir
Writes to foreign memory regions
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Threat name:
Script-Macro.Trojan.Valyria
Status:
Malicious
First seen:
2021-12-31 18:13:37 UTC
File Type:
Document
Extracted files:
26
AV detection:
24 of 43 (55.81%)
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
Suspicious behavior: AddClipboardFormatListener
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Office loads VBA resources, possible macro or embedded object present
Malware family:
Quasar
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
Score:
1.00
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
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