MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 051851a940f92112ddf290124d2cea4acd2d0d1f2522c8e942faef9ed6fff244. 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 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 051851a940f92112ddf290124d2cea4acd2d0d1f2522c8e942faef9ed6fff244
SHA3-384 hash: 3271f58a7082783e40c94a691796f9de83d04cac6b84c953590bb47b03dfeba529c909ea70a66b1390fb18aa47dc54e3
SHA1 hash: e4906248df2ede9c6dc139bae06dd07400713da5
MD5 hash: 7d9d74f288692c926db35569320ba58e
humanhash: kansas-juliet-steak-green
File name:Pago.xls
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:111'104 bytes
First seen:2023-02-14 16:48:16 UTC
Last seen:2023-02-15 07:37:50 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 3072:Vk+xEtjPOtioVjDGUU1qfDlaGGx+cL2QnAdyW8X83qpL71GOPEwOyV/n:VlxEtjPOtioVjDGUU1qfDlavx+W2QnAg
TLSH T103B37D9676D5E816DA44573A4CEBC3E13662FC41AF66834B3285F71F2F327C0C94221A
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 lowmal3
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
3204 bytesSummaryInformation
475156 bytesWorkbook
5569 bytes_VBA_PROJECT_CUR/PROJECT
6128 bytes_VBA_PROJECT_CUR/PROJECTwm
7950 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
1110969 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
126324 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
132487 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
14348 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
152340 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
16440 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
1784 bytes_VBA_PROJECT_CUR/VBA/__SRP_4
18104 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 :
3
# of downloads :
211
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
3yOXarj-45774-EEEB171925BB8BE364b50abf1.txt
Verdict:
Suspicious activity
Analysis date:
2023-02-14 15:25:56 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/613d1168-5356-46e7-9c94-211eaee1d7af

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/365897/
Detection(s):
MiscreantPunch.EvilMacro.DL.170224.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.CROAndTheTangerineDream.M1.20200630.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.WeAreAPartOfTheRythmNation.20201230.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.StatusIsLikeAFriend.20210201.UNOFFICIAL
Create hunting rule

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

Sanesecurity.Badmacro.Doc.wsc.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
DNS request
Verdict:
Malicious
Threat level:
  10/10
Confidence:
80%
Tags:
language-nl macros macros-on-open packed quasar
Link:
https://www.filescan.io/uploads/63ebbb806ea97adc8fc20c67/reports/f0fc8441-b1a3-490c-865b-c395c3c31766/overview
Verdict:
Malicious
Labled as:
Msoffice/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/051851a940f92112ddf290124d2cea4acd2d0d1f2522c8e942faef9ed6fff244
Label:
Malicious
Suspicious Score:
9.9/10
Score Malicious:
1%
Score Benign:
0%
Link:
https://www.malware.ai/gui/files/?id=76d2c6a6-cbc7-4291-953b-6e12be1291ff
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/051851a940f92112ddf290124d2cea4acd2d0d1f2522c8e942faef9ed6fff244
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/1174711
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
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 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
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Snort IDS alert for network traffic
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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: 807507 Sample: Pago.xls Startdate: 14/02/2023 Architecture: WINDOWS Score: 100 66 Snort IDS alert for network traffic 2->66 68 Malicious sample detected (through community Yara rule) 2->68 70 Antivirus detection for URL or domain 2->70 72 15 other signatures 2->72 10 EXCEL.EXE 53 24 2->10         started        15 taskeng.exe 1 2->15         started        process3 dnsIp4 54 metkilit.com 5.180.184.231, 443, 49171 DBT-ASTR Turkey 10->54 42 C:\Users\user\AppData\Roaming\...\LCFOS.exe, PE32 10->42 dropped 44 C:\Users\user\AppData\...\iduhfnsjn[1].exe, PE32 10->44 dropped 46 C:\Users\user\Desktop\Pago.xls, Composite 10->46 dropped 78 Document exploit detected (creates forbidden files) 10->78 17 LCFOS.exe 10->17         started        20 LCFOS.exe 15->20         started        file5 signatures6 process7 signatures8 56 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 17->56 58 May check the online IP address of the machine 17->58 60 Machine Learning detection for dropped file 17->60 62 Uses schtasks.exe or at.exe to add and modify task schedules 17->62 22 LCFOS.exe 12 2 17->22         started        64 Injects a PE file into a foreign processes 20->64 27 LCFOS.exe 20->27         started        process9 dnsIp10 52 ip-api.com 208.95.112.1, 49172, 49173, 80 TUT-ASUS United States 22->52 40 C:\Users\user\AppData\Roaming\rvi\cit.exe, PE32 22->40 dropped 76 Hides that the sample has been downloaded from the Internet (zone.identifier) 22->76 29 cit.exe 22->29         started        32 schtasks.exe 22->32         started        file11 signatures12 process13 signatures14 80 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 29->80 82 May check the online IP address of the machine 29->82 84 Machine Learning detection for dropped file 29->84 86 Injects a PE file into a foreign processes 29->86 34 cit.exe 12 29->34         started        process15 dnsIp16 48 camgreetgroop.sytes.net 185.254.37.238, 49174, 49175, 49176 NETERRA-ASBG Germany 34->48 50 ip-api.com 34->50 74 Hides that the sample has been downloaded from the Internet (zone.identifier) 34->74 38 schtasks.exe 34->38         started        signatures17 process18
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/051851a940f92112ddf290124d2cea4acd2d0d1f2522c8e942faef9ed6fff244/
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2023-02-14 13:57:02 UTC
File Type:
Document
Extracted files:
28
AV detection:
15 of 37 (40.54%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=aumfdkka7eqrfxpssaje2lhkjlgs2di7eurmr2kc7lxz5vx76jca._file
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:hwl evasion macro macro_on_action spyware trojan
Link:
https://tria.ge/reports/230214-vbnvaaeg68/
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
Looks up external IP address via web service
Maps connected drives based on registry
Checks BIOS information in registry
Executes dropped EXE
Downloads MZ/PE file
Looks for VMWare Tools registry key
Looks for VirtualBox Guest Additions in registry
Quasar RAT
Quasar payload
Malware Config
C2 Extraction:
camgreetgroop.sytes.net:64578
Malware family:
xRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/051851a940f9/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/051851a940f92112ddf290124d2cea4acd2d0d1f2522c8e942faef9ed6fff244

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
Rule name:QbotStuff
Create hunting rule
Author:anonymous
Rule name:SUSP_OneNote
Create hunting rule
Author:spatronn
Description:Hard-Detect One

File information

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

Malspam

QuasarRAT

Excel file xls 051851a940f92112ddf290124d2cea4acd2d0d1f2522c8e942faef9ed6fff244

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/365897/

Comments