MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4d7aa84268aa87f5de7dfe0f99f748d732b7f669d4a7f8364d09c818804aa2e. 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: 7


Intelligence 7 IOCs YARA 11 File information Comments
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SHA256 hash: a4d7aa84268aa87f5de7dfe0f99f748d732b7f669d4a7f8364d09c818804aa2e
SHA3-384 hash: 1a91d7454212387f68f0e41411e2b28a264e8e92e700ec3bfa4eb1da7b149dab42c057baa33c2768b74fc490ca0da098
SHA1 hash: c26913e9a5a419d6d5d1c95180d574ed27aada37
MD5 hash: 5826d1798b0b515b061c74be1e46ef0f
humanhash: chicken-bravo-jig-october
File name:a4d7aa84268aa87f5de7dfe0f99f748d732b7f669d4a7f8364d09c818804aa2e
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:356'352 bytes
First seen:2020-11-13 16:15:00 UTC
Last seen:2024-07-24 19:54:49 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'854 x AgentTesla, 19'783 x Formbook, 12'304 x SnakeKeylogger)
ssdeep 6144:/zNHXf500MbH/om4YIY8Y9fAu+bG205rrWxdn+yyojQWrri:7d505/N4YIY8Y9fbOAiaoNrri
TLSH A4749C1333A8E93BD1BD173AF43346194BB1D487BA16E39B5A5855B92C233C68D903B3
Reporter seifreed
Tags:QuasarRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
81
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
Win.Trojan.Generic-6295765-0
Create hunting rule

Win.Malware.Generic-6623004-0
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Win.Packed.Passwordstealera-9792228-0
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Using the Windows Management Instrumentation requests
DNS request
Sending an HTTP GET request
Creating a file in the %temp% directory
Running batch commands
Creating a process with a hidden window
Creating a file
Launching a process
Unauthorized injection to a recently created process
Delayed writing of the file
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.evad
Score:
96 / 100
Link:
https://www.joesandbox.com/analysis/534333
Signature
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
Hides that the sample has been downloaded from the Internet (zone.identifier)
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
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 316268 Sample: Z9vseF8If7 Startdate: 14/11/2020 Architecture: WINDOWS Score: 96 78 ip-api.com 2->78 96 Malicious sample detected (through community Yara rule) 2->96 98 Antivirus / Scanner detection for submitted sample 2->98 100 Multi AV Scanner detection for submitted file 2->100 102 6 other signatures 2->102 15 Z9vseF8If7.exe 15 5 2->15         started        signatures3 process4 dnsIp5 86 ip-api.com 208.95.112.1, 49722, 49730, 49733 TUT-ASUS United States 15->86 88 192.168.2.1 unknown unknown 15->88 74 C:\Users\user\AppData\...\Z9vseF8If7.exe.log, ASCII 15->74 dropped 90 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->90 20 cmd.exe 1 15->20         started        file6 signatures7 process8 signatures9 104 Uses ping.exe to sleep 20->104 23 Z9vseF8If7.exe 4 20->23         started        27 conhost.exe 20->27         started        29 PING.EXE 1 20->29         started        31 chcp.com 1 20->31         started        process10 dnsIp11 82 ip-api.com 23->82 108 Hides that the sample has been downloaded from the Internet (zone.identifier) 23->108 33 cmd.exe 1 23->33         started        signatures12 process13 signatures14 92 Uses ping.exe to sleep 33->92 36 Z9vseF8If7.exe 4 33->36         started        40 conhost.exe 33->40         started        42 PING.EXE 1 33->42         started        44 chcp.com 1 33->44         started        process15 dnsIp16 80 ip-api.com 36->80 106 Hides that the sample has been downloaded from the Internet (zone.identifier) 36->106 46 cmd.exe 1 36->46         started        signatures17 process18 signatures19 112 Uses ping.exe to sleep 46->112 49 Z9vseF8If7.exe 46->49         started        53 conhost.exe 46->53         started        55 chcp.com 1 46->55         started        57 PING.EXE 46->57         started        process20 dnsIp21 76 ip-api.com 49->76 94 Hides that the sample has been downloaded from the Internet (zone.identifier) 49->94 59 cmd.exe 49->59         started        signatures22 process23 signatures24 110 Uses ping.exe to sleep 59->110 62 Z9vseF8If7.exe 59->62         started        66 conhost.exe 59->66         started        68 chcp.com 59->68         started        70 PING.EXE 59->70         started        process25 dnsIp26 84 ip-api.com 62->84 114 Hides that the sample has been downloaded from the Internet (zone.identifier) 62->114 72 cmd.exe 62->72         started        signatures27 process28
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a4d7aa84268aa87f5de7dfe0f99f748d732b7f669d4a7f8364d09c818804aa2e/
Threat name:
ByteCode-MSIL.Backdoor.QuasarRAT
Create hunting rule
Status:
Malicious
First seen:
2020-11-13 16:32:36 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=utl2vbbgrkuh6xph37qpth3urvzsw73gtvfh7a3e2coidcaevixa._file
Result
Malware family:
quasar
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Score:
  10/10
Tags:
family:quasar spyware trojan
Link:
https://tria.ge/reports/201113-yh2e8fy59a/
Behaviour
Runs ping.exe
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Looks up external IP address via web service
Quasar RAT
Unpacked files
SH256 hash:
a4d7aa84268aa87f5de7dfe0f99f748d732b7f669d4a7f8364d09c818804aa2e
MD5 hash:
5826d1798b0b515b061c74be1e46ef0f
SHA1 hash:
c26913e9a5a419d6d5d1c95180d574ed27aada37
Link:
https://www.unpac.me/results/2b2cceba-8263-4b4c-b762-be767114e62e/
SH256 hash:
76d43255d98aa8962d3c1cfe4f3d63323e40e7a8ce32cddd78ac2b10cfbe4003
MD5 hash:
d9c66758274c7f28dc36fbcbf5a078ad
SHA1 hash:
61e7009e54e39d09531012666b1252c4fb5093bd
Link:
https://www.unpac.me/results/2b2cceba-8263-4b4c-b762-be767114e62e/
Please note that we are no longer able to provide a coverage score for Virus Total.

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.

  
Delivery method
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