MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b31fb3832c2f366796fcc9165c60c58da5c866973377ab0d43f71586c461b8fb. 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: 8


Intelligence 8 IOCs YARA 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b31fb3832c2f366796fcc9165c60c58da5c866973377ab0d43f71586c461b8fb
SHA3-384 hash: d094a69768020d32315e755d6c131a5975ff08621f1669b85bad1635a88908c3b8f9a87b9534e02f5d40a48d204d8a3a
SHA1 hash: 294eed073c1442aa39590843e71a154ddf78cdb2
MD5 hash: 723b3f9c111d211a38d4753a72dbf119
humanhash: solar-september-low-september
File name:723b3f9c111d211a38d4753a72dbf119.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:4'343'408 bytes
First seen:2020-12-03 14:14:44 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 5479775c1d012f10601477c1237fe7d4 (6 x QuasarRAT, 2 x BitRAT, 1 x RevCodeRAT)
ssdeep 98304:avPj6AzYlBqP1Vd1lw53zJPID22pI11TjR24mScCy7t:b3B07d/wpdAM1hd2D
Threatray 38 similar samples on MalwareBazaar
TLSH 6116226FA2A09437C1631B7C8D0BDB5B5C2ABE132B2898C62BE55D4CBF3C1417939197
Reporter abuse_ch
Tags:exe QuasarRAT


Avatar
abuse_ch
QuasarRAT C2:
185.157.162.81:1973

Intelligence

File Origin
# of uploads :
1
# of downloads :
142
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/106601/
Detection(s):
SecuriteInfo.com.BackDoor.Quasar.124.18597.2139.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Launching a process
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/554711
Signature
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Connects to many ports of the same IP (likely port scanning)
Contains functionality to detect sleep reduction / modifications
Contains functionality to hide a thread from the debugger
Contains functionality to inject code into remote processes
Creates files in alternative data streams (ADS)
Detected unpacking (changes PE section rights)
Detected unpacking (creates a PE file in dynamic memory)
Detected unpacking (overwrites its own PE header)
Drops VBS files to the startup folder
Found Tor onion address
Hides that the sample has been downloaded from the Internet (zone.identifier)
Hides threads from debuggers
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
May check the online IP address of the machine
Multi AV Scanner detection for domain / URL
Queues an APC in another process (thread injection)
Sigma detected: Drops script at startup location
Writes to foreign memory regions
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 326453 Sample: ogYg79jWpR.exe Startdate: 03/12/2020 Architecture: WINDOWS Score: 100 69 yz.videomarket.eu 2->69 71 prda.aadg.msidentity.com 2->71 73 g.msn.com 2->73 91 Multi AV Scanner detection for domain / URL 2->91 93 Malicious sample detected (through community Yara rule) 2->93 95 Yara detected Quasar RAT 2->95 97 7 other signatures 2->97 13 ogYg79jWpR.exe 2->13         started        16 wscript.exe 1 2->16         started        18 wscript.exe 2->18         started        signatures3 process4 signatures5 131 Writes to foreign memory regions 13->131 133 Allocates memory in foreign processes 13->133 135 Queues an APC in another process (thread injection) 13->135 20 notepad.exe 5 13->20         started        24 jmpo.exe 16->24         started        26 jqft.exe 18->26         started        process6 file7 55 C:\Users\user\AppData\Roaming\lkmo\jmpo.exe, PE32 20->55 dropped 57 C:\Users\user\...\jmpo.exe:Zone.Identifier, ASCII 20->57 dropped 59 C:\Users\user\AppData\Roaming\...\wvbs.vbs, ASCII 20->59 dropped 103 Creates files in alternative data streams (ADS) 20->103 105 Drops VBS files to the startup folder 20->105 28 jmpo.exe 20->28         started        107 Maps a DLL or memory area into another process 24->107 31 jmpo.exe 24->31         started        33 jqft.exe 26->33         started        signatures8 process9 signatures10 121 Detected unpacking (changes PE section rights) 28->121 123 Detected unpacking (overwrites its own PE header) 28->123 125 Machine Learning detection for dropped file 28->125 129 3 other signatures 28->129 35 jmpo.exe 1 20 28->35         started        127 Hides threads from debuggers 31->127 process11 dnsIp12 75 yz.videomarket.eu 185.157.162.81, 1972, 1973, 49708 OBE-EUROPEObenetworkEuropeSE Sweden 35->75 77 medicalcorp.ro 176.126.200.6, 49712, 80 GTSCEGTSCentralEuropeAntelGermanyCZ Romania 35->77 61 C:\Users\user\...\aO3yy0EQwOJgrtJV.exe, PE32 35->61 dropped 63 C:\Users\user\AppData\...\kbrowserQ[1].exe, PE32 35->63 dropped 109 Hides threads from debuggers 35->109 111 Injects a PE file into a foreign processes 35->111 40 aO3yy0EQwOJgrtJV.exe 35->40         started        43 jmpo.exe 35->43         started        file13 signatures14 process15 signatures16 113 Machine Learning detection for dropped file 40->113 115 Writes to foreign memory regions 40->115 117 Allocates memory in foreign processes 40->117 119 Contains functionality to detect sleep reduction / modifications 40->119 45 notepad.exe 4 40->45         started        process17 file18 65 C:\Users\user\AppData\Roaming\lktq\jqft.exe, PE32 45->65 dropped 67 C:\Users\user\AppData\Roaming\...\wqbb.vbs, ASCII 45->67 dropped 48 jqft.exe 45->48         started        process19 signatures20 83 Detected unpacking (changes PE section rights) 48->83 85 Detected unpacking (creates a PE file in dynamic memory) 48->85 87 Detected unpacking (overwrites its own PE header) 48->87 89 3 other signatures 48->89 51 jqft.exe 15 4 48->51         started        process21 dnsIp22 79 yz.videomarket.eu 51->79 81 ip-api.com 208.95.112.1, 49716, 80 TUT-ASUS United States 51->81 99 Hides that the sample has been downloaded from the Internet (zone.identifier) 51->99 101 Installs a global keyboard hook 51->101 signatures23
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b31fb3832c2f366796fcc9165c60c58da5c866973377ab0d43f71586c461b8fb/
Threat name:
Win32.Trojan.Wacatac
Create hunting rule
Status:
Malicious
First seen:
2020-12-03 14:15:07 UTC
AV detection:
23 of 28 (82.14%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wmp3hazmf43gpfx4zelfyygfrws4qzuxgn32wdkd64kynrdbxd5q._file
Verdict:
malicious
Similar samples:
04c27b0ff1c12b58c1520db0ffc14e7ced2f5adae24e08a3ff66fcc1723676cf
QuasarRAT
092223938bed5fec479602f4bf2cb0fd28dd628e8754714047b0b7939cd2e298
QuasarRAT
0cf6c64800271784234f89dd95925d58075254e5756946de94f447b6defee4fc
QuasarRAT
40512789548e02bb2db55e51975a733d342279a76c7ecdf78b9e238329591200
QuasarRAT
4e4cd19c835a2fafb63df3429c6db21507e34fcb33c3072c93f28fb4fc32967b
QuasarRAT
723e6b54cd996205412396bbfba18171a8e4e7297dd2492b35ec198e122849cb
QuasarRAT
78fc1b0ad5b1bf8392a5e1a6dde5dab2fbee2f2fbb833c3c4ba85ace7e9c35e5
QuasarRAT
83db3e008537b9da1f048cf2a36931238afcdabf35ecbeedecd808ea6bee3bf3
QuasarRAT
99a6c8e156dba4fda6e2b6ca0802cc08d49556b489e97618e565768329521413
QuasarRAT
b7823b23e2ef21045e77a01f2f34f86f387a607f4c1d949571c01c1fcdfd7fa1
QuasarRAT
+ 28 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
n/a
Link:
https://tria.ge/reports/201203-yeg2lt4mn2/
Behaviour
NTFS ADS
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Drops startup file
Loads dropped DLL
Executes dropped EXE
Unpacked files
SH256 hash:
b31fb3832c2f366796fcc9165c60c58da5c866973377ab0d43f71586c461b8fb
MD5 hash:
723b3f9c111d211a38d4753a72dbf119
SHA1 hash:
294eed073c1442aa39590843e71a154ddf78cdb2
Link:
https://www.unpac.me/results/a330ccd8-0c88-461a-9f93-fefb6af56890/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b31fb3832c2f366796fcc9165c60c58da5c866973377ab0d43f71586c461b8fb

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:Chrome_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Chrome in files like avemaria
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:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
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:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
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 b31fb3832c2f366796fcc9165c60c58da5c866973377ab0d43f71586c461b8fb

(this sample)

Cape
Cape
https://www.capesandbox.com/analysis/106601/
  
URLhaus
https://urlhaus.abuse.ch/url/869726/
  
Delivery method
Distributed via web download

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