MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6a746da4275da8295c4a5718de7707d7e7543c16c1046fb12839d3868059e5dc. 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: 25


Intelligence 10 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6a746da4275da8295c4a5718de7707d7e7543c16c1046fb12839d3868059e5dc
SHA3-384 hash: d50e32d2ec466f0f5e9d5c87e1d54b764d2a94fea935a34d04a81bc50a3839bba927d1138bb6d99dd142e5b08e4bd4f8
SHA1 hash: 7a51a94c48c81b3926ce965edb3a82830e44f969
MD5 hash: ac2ef22686c40c4607dad51e3cb85d72
humanhash: connecticut-cardinal-mango-one
File name:Payment Receipt.xls
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:77'312 bytes
First seen:2022-07-19 17:55:27 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:BYrxEtjPOtioVjDGUU1qfDlaGGx+cL2QnAsqOXzi/VYlRc+ITz6URd1x:2rxEtjPOtioVjDGUU1qfDlaGGx+cL2Qk
TLSH T17A73E5177567E879C0898B392CF2F59D3A33BC256E3A82477250F3AEED72691C813605
TrID 46.5% (.XLS) Microsoft Excel sheet (alternate) (56500/1/4)
26.7% (.XLS) Microsoft Excel sheet (32500/1/3)
20.1% (.XLS) Microsoft Excel sheet (alternate) (24500/1/2)
6.5% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter abuse_ch
Tags:QuasarRAT xls

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: 25
OLE dump

MalwareBazaar was able to identify 17 sections in this file using oledump:

Section IDSection sizeSection name
1107 bytesCompObj
2244 bytesDocumentSummaryInformation
3208 bytesSummaryInformation
450675 bytesWorkbook
5636 bytes_VBA_PROJECT_CUR/PROJECT
6128 bytes_VBA_PROJECT_CUR/PROJECTwm
7833 bytes_VBA_PROJECT_CUR/VBA/Module1
8985 bytes_VBA_PROJECT_CUR/VBA/Sheet1
9985 bytes_VBA_PROJECT_CUR/VBA/Sheet2
10985 bytes_VBA_PROJECT_CUR/VBA/Sheet3
117267 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
124790 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
131468 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
14265 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
15408 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
16220 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
17612 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:

TypeKeywordDescription
AutoExecWorkbook_OpenRuns when the Excel Workbook is opened
SuspiciousOpenMay open a file
SuspiciousWriteMay write to a file (if combined with Open)
Suspiciousadodb.streamMay create a text file
SuspiciousSaveToFileMay create a text file
SuspiciousShellMay run an executable file or a system command
SuspiciousWScript.ShellMay run an executable file or a system command
SuspiciousCreateObjectMay create an OLE object
SuspiciousShell.ApplicationMay run an application (if combined with CreateObject)
Suspiciousmicrosoft.xmlhttpMay download files from the Internet
SuspiciousChrMay attempt to obfuscate specific strings (use option --deobf to deobfuscate)
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
1
# of downloads :
250
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/291958/
Detection(s):
TwinWave.EvilDoc.StatusIsLikeAFriend.20210201.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Office.Macro-13.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Office.Macro-11.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.ShoulderOfOrion.20220121.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.OplupPicturesOfU.MSOLE2.220719.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/6a746da4275da8295c4a5718de7707d7e7543c16c1046fb12839d3868059e5dc/results/dashboard
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
macros macros-on-open packed
Link:
https://www.filescan.io/uploads/62d6f07dee649612ac5b99c7/reports/4c311018-24b5-462f-abfe-3baef2977880/overview
Label:
Malicious
Suspicious Score:
7.6/10
Score Malicious:
76%
Score Benign:
24%
Link:
https://www.malware.ai/gui/files/?id=d90423db-072f-4417-998f-fe4208cbae89
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/6a746da4275da8295c4a5718de7707d7e7543c16c1046fb12839d3868059e5dc
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
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1036720
Signature
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
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 hexadecimal encoded strings
Document exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
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 submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Office process drops PE file
PE file contains section with special chars
PE file has nameless sections
Snort IDS alert for network traffic
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Generic Downloader
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 669217 Sample: Payment Receipt.xls Startdate: 19/07/2022 Architecture: WINDOWS Score: 100 57 Snort IDS alert for network traffic 2->57 59 Malicious sample detected (through community Yara rule) 2->59 61 Antivirus detection for URL or domain 2->61 63 18 other signatures 2->63 9 EXCEL.EXE 53 24 2->9         started        14 taskeng.exe 1 2->14         started        process3 dnsIp4 45 tractorandinas.com 192.185.115.3, 443, 49173 UNIFIEDLAYER-AS-1US United States 9->45 47 www.tractorandinas.com 9->47 37 C:\Users\user\AppData\Roaming\...\FCFUB.exe, PE32 9->37 dropped 39 C:\Users\user\...\yonkhpbnvhncn[1].exe, PE32 9->39 dropped 41 C:\Users\user\Desktop\Payment Receipt.xls, Composite 9->41 dropped 67 Document exploit detected (creates forbidden files) 9->67 16 FCFUB.exe 9->16         started        19 FCFUB.exe 14->19         started        file5 signatures6 process7 signatures8 49 Detected unpacking (changes PE section rights) 16->49 51 May check the online IP address of the machine 16->51 53 Machine Learning detection for dropped file 16->53 55 2 other signatures 16->55 21 FCFUB.exe 12 2 16->21         started        26 FCFUB.exe 19->26         started        process9 dnsIp10 43 ip-api.com 208.95.112.1, 49174, 80 TUT-ASUS United States 21->43 35 C:\Users\user\AppData\Roaming\silk\ccre.exe, PE32 21->35 dropped 65 Hides that the sample has been downloaded from the Internet (zone.identifier) 21->65 28 ccre.exe 21->28         started        31 schtasks.exe 21->31         started        file11 signatures12 process13 signatures14 69 Detected unpacking (changes PE section rights) 28->69 71 Machine Learning detection for dropped file 28->71 73 Injects a PE file into a foreign processes 28->73 33 ccre.exe 28->33         started        process15
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6a746da4275da8295c4a5718de7707d7e7543c16c1046fb12839d3868059e5dc/
Threat name:
Script-Macro.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2022-07-19 14:34:01 UTC
File Type:
Document
Extracted files:
26
AV detection:
24 of 39 (61.54%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=nj2g3jbhlwucsxckk4mn45yh27tvipawyecg7mjihhjynacz4xoa._file
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:nop macro macro_on_action spyware trojan
Link:
https://tria.ge/reports/220719-wh1m4afgd9/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Creates scheduled task(s)
Office loads VBA resources, possible macro or embedded object present
Suspicious use of SetThreadContext
Looks up external IP address via web service
Executes dropped EXE
Quasar RAT
Quasar payload
Malware Config
C2 Extraction:
dnuocc.com:64594
www.dnuocc.com:64594
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/6a746da4275da8295c4a5718de7707d7e7543c16c1046fb12839d3868059e5dc

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:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
Rule name:informational_win_ole_protected
Create hunting rule
Author:Jeff White (karttoon@gmail.com) @noottrak
Description:Identify OLE Project protection within documents.
Rule name:malware_shellcode_hash
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:pdb_YARAify
Create hunting rule
Author:@wowabiy314
Description:PDB

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

QuasarRAT

Excel file xls 6a746da4275da8295c4a5718de7707d7e7543c16c1046fb12839d3868059e5dc

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/291958/

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