MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 858963fa777ab0af515f7a81ff5ce29ffdda5361c67137cf0be35095bc7f1d9b. 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: 13


Maldoc score: 23


Intelligence 13 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 858963fa777ab0af515f7a81ff5ce29ffdda5361c67137cf0be35095bc7f1d9b
SHA3-384 hash: bdd675fec16d9b66aca3f3ca6fb6c16cf6345c1dd37d88a4571c45dfce6d8952155c0487d1c361d68b284297efc5bd48
SHA1 hash: ab863a70358f150e3f0da53c330f7226d46037f4
MD5 hash: f5a8b72709235c68196a397174152660
humanhash: may-comet-harry-item
File name:Estado de cuenta.xls
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:377'856 bytes
First seen:2022-11-27 17:15:18 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 6144:exEtjPOtioVjDGUU1qfDlavx+W2QnAbwYqzklWhUPheJl7Gpe8Kg2nOQcSRWQSSL:GwYqzklavDiknOfySloh16I
TLSH T1DF84026536D0D917C59B17354CE6C2DA2A33FC465FBA830B3244F36F8AB6B81C91261B
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: 23
OLE dump

MalwareBazaar was able to identify 19 sections in this file using oledump:

Section IDSection sizeSection name
1107 bytesCompObj
2244 bytesDocumentSummaryInformation
3208 bytesSummaryInformation
4349294 bytesWorkbook
5647 bytes_VBA_PROJECT_CUR/PROJECT
6128 bytes_VBA_PROJECT_CUR/PROJECTwm
7960 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
115471 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
125180 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
131480 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
14229 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
1584 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
16104 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
17388 bytes_VBA_PROJECT_CUR/VBA/__SRP_4
18158 bytes_VBA_PROJECT_CUR/VBA/__SRP_5
19613 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)

Intelligence

File Origin
# of uploads :
1
# of downloads :
342
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Estado de cuenta.xls
Verdict:
No threats detected
Analysis date:
2022-11-27 17:16:48 UTC
Tags:
macros macros-on-open
Link:
https://app.any.run/tasks/8c1e7400-9be3-491d-a1bc-86354a6705e7

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:
n/a
Link:
https://www.capesandbox.com/analysis/339103/
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

Sanesecurity.Badmacro.XlsM.objshell.UNOFFICIAL
Create hunting rule

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
DNS request
Creating a file in the %AppData% subdirectories
Sending an HTTP GET request
Unauthorized injection to a recently created process
Sending a custom TCP request by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/858963fa777ab0af515f7a81ff5ce29ffdda5361c67137cf0be35095bc7f1d9b/results/dashboard
Behaviour
BlacklistAPI detected
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/63839b54559d07a06f47cd8a/reports/0860e5d1-2da5-45bb-b9f3-52d21d652b39/overview
Label:
Malicious
Suspicious Score:
7.7/10
Score Malicious:
78%
Score Benign:
22%
Link:
https://www.malware.ai/gui/files/?id=66baea4e-4774-4d4d-85a4-00754aefc2d1
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/858963fa777ab0af515f7a81ff5ce29ffdda5361c67137cf0be35095bc7f1d9b
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/1121999
Signature
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
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 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 dnsIp2 2 Behavior Graph ID: 754727 Sample: Estado de cuenta.xls Startdate: 27/11/2022 Architecture: WINDOWS Score: 100 49 www.dnuocc.com 2->49 71 Snort IDS alert for network traffic 2->71 73 Malicious sample detected (through community Yara rule) 2->73 75 Antivirus detection for URL or domain 2->75 77 18 other signatures 2->77 11 EXCEL.EXE 53 24 2->11         started        16 taskeng.exe 1 2->16         started        signatures3 process4 dnsIp5 59 js-hurling.com 192.185.113.96, 443, 49181 UNIFIEDLAYER-AS-1US United States 11->59 43 C:\Users\user\AppData\Roaming\...\CYIGRD.exe, PE32 11->43 dropped 45 C:\Users\user\...\timetableschedule[1].exe, PE32 11->45 dropped 47 C:\Users\user\Desktopstado de cuenta.xls, Composite 11->47 dropped 83 Document exploit detected (creates forbidden files) 11->83 18 CYIGRD.exe 11->18         started        21 CYIGRD.exe 16->21         started        file6 signatures7 process8 signatures9 61 Antivirus detection for dropped file 18->61 63 Detected unpacking (changes PE section rights) 18->63 65 May check the online IP address of the machine 18->65 69 2 other signatures 18->69 23 CYIGRD.exe 12 2 18->23         started        67 Injects a PE file into a foreign processes 21->67 28 CYIGRD.exe 21->28         started        process10 dnsIp11 57 ip-api.com 208.95.112.1, 49182, 49183, 80 TUT-ASUS United States 23->57 41 C:\Users\user\AppData\Roaming\hik\hvc.exe, PE32 23->41 dropped 81 Hides that the sample has been downloaded from the Internet (zone.identifier) 23->81 30 hvc.exe 23->30         started        33 schtasks.exe 23->33         started        file12 signatures13 process14 signatures15 85 Antivirus detection for dropped file 30->85 87 Detected unpacking (changes PE section rights) 30->87 89 May check the online IP address of the machine 30->89 91 2 other signatures 30->91 35 hvc.exe 12 30->35         started        process16 dnsIp17 51 dnuocc.com 185.216.71.78, 49184, 49185, 49186 CLOUDCOMPUTINGDE Germany 35->51 53 www.dnuocc.com 35->53 55 ip-api.com 35->55 79 Hides that the sample has been downloaded from the Internet (zone.identifier) 35->79 39 schtasks.exe 35->39         started        signatures18 process19
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/858963fa777ab0af515f7a81ff5ce29ffdda5361c67137cf0be35095bc7f1d9b/
Threat name:
Script-Macro.Trojan.Woreflint
Create hunting rule
Status:
Malicious
First seen:
2022-11-26 16:28:05 UTC
File Type:
Document
Extracted files:
28
AV detection:
19 of 40 (47.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qwewh6txpkyk6uk7pka76xhct765uu3byzytptyl4nijlpd7dwnq._file
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:hop macro macro_on_action persistence spyware trojan
Link:
https://tria.ge/reports/221127-vs5t5ahe7x/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Suspicious use of SetThreadContext
Adds Run key to start application
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
Gathering data
Malware family:
xRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/858963fa777a/report/overview.html
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/858963fa777ab0af515f7a81ff5ce29ffdda5361c67137cf0be35095bc7f1d9b

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 858963fa777ab0af515f7a81ff5ce29ffdda5361c67137cf0be35095bc7f1d9b

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/339103/

Comments