MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4a4378de27cd95ef7ab712064303f817e01f4630bce5f290ce3af15d55a43321. 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


Intelligence 10 IOCs YARA 8 File information Comments
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SHA256 hash: 4a4378de27cd95ef7ab712064303f817e01f4630bce5f290ce3af15d55a43321
SHA3-384 hash: d712882de169e0a371566b378ccc91289de7a82c23b9f850c79bf2c15f910626b4eb978da2b7c0c2d080ea3e80abe366
SHA1 hash: f1bf2fac33f5b7bc16b24fd6532b0fbb3f4ec529
MD5 hash: 36cba74e70e5e4ada41575f783a62a45
humanhash: enemy-lamp-potato-robin
File name:VryE7Rq2.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:356'352 bytes
First seen:2020-09-11 16:10:49 UTC
Last seen:2020-09-11 16:17:22 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 6144:wx6bPXhLApfpyeyJYp2J2fbsUbBsap5cau1GUTZgBlQXTszn:QmhApIqgeAMBoau1GUTZg7QUn
Threatray 84 similar samples on MalwareBazaar
TLSH 33748C1377A8EA7BD1BE2B7AE43307154BB1D447B716E38B5A5855B82C123838D903B3
Reporter pmelson
Tags:exe QuasarRAT VoidRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
159
Origin country :
n/a
Vendor Threat Intelligence
Detection:
QuasarRAT
Create hunting rule
Link:
https://www.capesandbox.com/analysis/58688/
Detection(s):
Win.Trojan.Generic-6295765-0
Create hunting rule

Win.Malware.Generic-6623004-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Using the Windows Management Instrumentation requests
Sending a UDP request
DNS request
Sending an HTTP GET request
Creating a file in the Windows subdirectories
Launching a process
Enabling the 'hidden' option for recently created files
Creating a process from a recently created file
Creating a file
Setting a keyboard event handler
Creating a file in the %AppData% subdirectories
Creating a window
Unauthorized injection to a recently created process
Connection attempt to an infection source
Enabling autorun by creating a file
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/464367
Signature
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Drops executables to the windows directory (C:\Windows) and starts them
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
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 dropped file
Multi AV Scanner detection for submitted file
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 284590 Sample: VryE7Rq2.exe Startdate: 11/09/2020 Architecture: WINDOWS Score: 100 38 0.tcp.ngrok.io 2->38 50 Multi AV Scanner detection for domain / URL 2->50 52 Malicious sample detected (through community Yara rule) 2->52 54 Antivirus / Scanner detection for submitted sample 2->54 56 6 other signatures 2->56 9 VryE7Rq2.exe 15 5 2->9         started        14 VryE7Rq2.exe 2 2->14         started        signatures3 process4 dnsIp5 40 ip-api.com 208.95.112.1, 49732, 49734, 80 TUT-ASUS United States 9->40 28 C:\Windows\SysWOW64\Dyoxys\Dyoxys.exe, PE32 9->28 dropped 30 C:\Users\user\AppData\...\VryE7Rq2.exe.log, ASCII 9->30 dropped 58 Drops executables to the windows directory (C:\Windows) and starts them 9->58 60 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->60 16 Dyoxys.exe 14 4 9->16         started        20 schtasks.exe 1 9->20         started        file6 signatures7 process8 dnsIp9 32 0.tcp.ngrok.io 3.22.30.40, 14773, 49735, 49746 AMAZON-02US United States 16->32 34 3.13.191.225, 14773, 49750, 49766 AMAZON-02US United States 16->34 36 3 other IPs or domains 16->36 42 Antivirus detection for dropped file 16->42 44 Multi AV Scanner detection for dropped file 16->44 46 Machine Learning detection for dropped file 16->46 48 2 other signatures 16->48 22 schtasks.exe 1 16->22         started        24 conhost.exe 20->24         started        signatures10 process11 process12 26 conhost.exe 22->26         started       
Detection:
quasarrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4a4378de27cd95ef7ab712064303f817e01f4630bce5f290ce3af15d55a43321/
Threat name:
ByteCode-MSIL.Backdoor.QuasarRAT
Create hunting rule
Status:
Malicious
First seen:
2020-09-11 16:12:06 UTC
AV detection:
27 of 29 (93.10%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jjbxrxrhzwk666vxcidega7yc7qb6rrqxts7fegohlyv2vnegmqq._file
Verdict:
malicious
Similar samples:
1f39ddbeb7fb355469a2ccc2cffda9006ca641562dc8dd300e855bb2fe2e33de
QuasarRAT
2fd0f9d77de102d8b53f3d38eb559d2cd0d0e9f4ba3cfbc042f952367b5ca65e
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588eb55b57e118fbee66a6d0586de453ea4e0ae1a781c73e1bbe10e8e24641fc
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5c711e224f09cfe6b651f58e3a075c54e7ad2d3a677cc71835bc37d8f21ad4b2
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5eb26eb056480f6083f7565a572b2dd6ebc992a99d8220dbf0d736c7b4a12077
QuasarRAT
749cf44e03a021f01f3604fd54781103ab897a69db71229f9319888be7a8bcd2
QuasarRAT
8fcf4d1528f2945b751c3d9035e17f7143fdbc94ef687f5c9e4e35d892c5922b
QuasarRAT
a4e79d826cc13a421a5b3b785413d92254992bceb6d392c72de16b61653b346f
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b23274e47a003476681da8925f2c15ff1c7ef988cabf76dbf1e5799a914a3ab1
QuasarRAT
ba9fd12aa57da28572f82eb2010a44b89a9cc1c9738f801fec02f44857163b8f
QuasarRAT
+ 74 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
trojan spyware family:quasar
Link:
https://tria.ge/reports/200911-yp1zvxl62n/
Behaviour
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Drops file in System32 directory
Looks up external IP address via web service
Loads dropped DLL
Executes dropped EXE
Quasar RAT
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Quasar
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4a4378de27cd95ef7ab712064303f817e01f4630bce5f290ce3af15d55a43321

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:CN_disclosed_20180208_KeyLogger_1
Create hunting rule
Author:Florian Roth
Description:Detects malware from disclosed CN malware set
Reference:https://www.virustotal.com/graph/#/selected/n120z79z208z189/drawer/graph-details
Rule name:MAL_QuasarRAT_May19_1
Create hunting rule
Author:Florian Roth
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:MSILStealer
Create hunting rule
Author:https://github.com/hwvs
Description:Detects strings from C#/VB Stealers and QuasarRat
Reference:https://github.com/quasar/QuasarRAT
Rule name:Quasar
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect QuasarRAT in memory
Rule name:Quasar_RAT_1
Create hunting rule
Author:Florian Roth
Description:Detects Quasar RAT
Reference:https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf
Rule name:Quasar_RAT_2
Create hunting rule
Author:Florian Roth
Description:Detects Quasar RAT
Reference:https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf
Rule name:Vermin_Keylogger_Jan18_1
Create hunting rule
Author:Florian Roth
Description:Detects Vermin Keylogger
Reference:https://researchcenter.paloaltonetworks.com/2018/01/unit42-vermin-quasar-rat-custom-malware-used-ukraine/
Rule name:xRAT_1
Create hunting rule
Author:Florian Roth
Description:Detects Patchwork malware
Reference:https://goo.gl/Pg3P4W

File information

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

Web download

QuasarRAT

Executable exe 4a4378de27cd95ef7ab712064303f817e01f4630bce5f290ce3af15d55a43321

(this sample)

  
Link
https://www.virustotal.com/gui/file/4a4378de27cd95ef7ab712064303f817e01f4630bce5f290ce3af15d55a43321/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/58688/

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