MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2f99e627f3cf5b119435e4e247366ccd20a0379c6fa47673cbd66976693ecee1. 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 13 File information Comments
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SHA256 hash: 2f99e627f3cf5b119435e4e247366ccd20a0379c6fa47673cbd66976693ecee1
SHA3-384 hash: cf2d22aa677f316aab01e7a8b04f68ed2dd46d5ba3dd0f17b8ac4c7147a4af799601cd833543fd2dc9abe6a70268ba1d
SHA1 hash: 69860d5285083280a2c40724b6580ddde14b97e9
MD5 hash: eebb3ed4fb31b7beabc7ef18c4136502
humanhash: alabama-lemon-uncle-lion
File name:QT55.vbs
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:836 bytes
First seen:2021-01-12 06:19:42 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 12:uQvWdqsvANruoKkdhcBY+096ea02WcAEruVsFH7wWZ9eA1pEI+lygygyg7:uQAJAQrkV9pFct3RtaAAIRddK
Threatray 166 similar samples on MalwareBazaar
TLSH AB014F2B0143869C82D5DBA3902474A1CE39D0C80B3BE502DCCD88888CADEEE7F3135A
Reporter abuse_ch
Tags:QuasarRAT RAT vbs


Avatar
abuse_ch
Malspam distributing QuasarRAT:

HELO: spfilter-1.sel01.mschosting.com
Sending IP: 110.4.41.65
From: TheBill #14448435421 <FreeBill-id1444843@domain.com>
Subject: your order has been placed##144484
Attachment: QT55.ISO (contains "QT55.vbs")

QuasarRAT payload URL:
https://z.zz.ht/nlOiE.jpg

QuasarRAT C2:
sdffgre.myq-see.com:9999 (51.89.204.178)

Intelligence

File Origin
# of uploads :
1
# of downloads :
168
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/111377/
Detection(s):
SecuriteInfo.com.ISB.Downloadergen48.24916.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a process with a hidden window
DNS request
Sending a UDP request
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Sending an HTTP GET request
Creating a file in the %AppData% subdirectories
Enabling autorun by creating a file
Unauthorized injection to a system process
Result
Verdict:
MALICIOUS
Result
Threat name:
Quasar
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Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/578615
Signature
.NET source code references suspicious native API functions
Drops VBS files to the startup folder
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Installs a global keyboard hook
Malicious sample detected (through community Yara rule)
May check the online IP address of the machine
Obfuscated command line found
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Sigma detected: Drops script at startup location
VBScript performs obfuscated calls to suspicious functions
Windows Shell Script Host drops VBS files
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected AntiVM_3
Yara detected Costura Assembly Loader
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 338355 Sample: QT55.vbs Startdate: 12/01/2021 Architecture: WINDOWS Score: 100 43 Malicious sample detected (through community Yara rule) 2->43 45 Yara detected AntiVM_3 2->45 47 Yara detected Quasar RAT 2->47 49 5 other signatures 2->49 7 wscript.exe 10 2->7         started        11 wscript.exe 7 2->11         started        process3 file4 33 C:\Users\user\AppData\Roaming\...\QT55.vbs, ASCII 7->33 dropped 57 VBScript performs obfuscated calls to suspicious functions 7->57 59 Wscript starts Powershell (via cmd or directly) 7->59 61 Obfuscated command line found 7->61 63 2 other signatures 7->63 13 powershell.exe 14 13 7->13         started        17 powershell.exe 16 11->17         started        signatures5 process6 dnsIp7 39 z.zz.ht 104.28.23.56, 443, 49728 CLOUDFLARENETUS United States 13->39 65 Writes to foreign memory regions 13->65 67 Injects a PE file into a foreign processes 13->67 19 MSBuild.exe 15 4 13->19         started        23 conhost.exe 13->23         started        41 172.67.131.130, 443, 49738 CLOUDFLARENETUS United States 17->41 25 conhost.exe 17->25         started        27 MSBuild.exe 17->27         started        29 MSBuild.exe 17->29         started        31 MSBuild.exe 17->31         started        signatures8 process9 dnsIp10 35 ip-api.com 208.95.112.1, 49733, 80 TUT-ASUS United States 19->35 37 sdffgre.myq-see.com 51.89.204.178, 49734, 9999 OVHFR France 19->37 51 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 19->51 53 Hides that the sample has been downloaded from the Internet (zone.identifier) 19->53 55 Installs a global keyboard hook 19->55 signatures11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2f99e627f3cf5b119435e4e247366ccd20a0379c6fa47673cbd66976693ecee1/
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2021-01-12 06:20:07 UTC
AV detection:
4 of 46 (8.70%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=f6m6mj7tz5nrdfbv4treontmzuqkan44n6shm46l2zuxm2j6z3qq._file
Verdict:
malicious
Similar samples:
025432a99764f95f01790ed77271c9f52c44bd6f08763d4ea77b81afbcad6485
QuasarRAT
0294e192621b21d5c8f2288496930fe5e947fd66cdff1a119ca2f8bbdd8a537e
QuasarRAT
092223938bed5fec479602f4bf2cb0fd28dd628e8754714047b0b7939cd2e298
QuasarRAT
23ed6ef7aec39fbc37b613e5ad3611a84ba1facc92489ed818dcc72bee129022
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41144a1619fe90c98275683389f032396d09687a336817bc65db220836c006b7
QuasarRAT
60d1ea55d2ecbd3f8289c2d11413ad2378551b8c87126d81483d18101bbd8e4a
QuasarRAT
60d4d26d3a67ea86d793602fa94ea83bdb8e888c4742b2a2601c68f577be4371
QuasarRAT
b31fb3832c2f366796fcc9165c60c58da5c866973377ab0d43f71586c461b8fb
QuasarRAT
b7823b23e2ef21045e77a01f2f34f86f387a607f4c1d949571c01c1fcdfd7fa1
QuasarRAT
fec56ffb3c5a61bffba235044da127eae17d9772dbd3817b8a5ce8cad0e93cb1
QuasarRAT
+ 156 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
n/a
Link:
https://tria.ge/reports/210112-c2mgp61w12/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Suspicious use of SetThreadContext
Looks up external IP address via web service
Drops startup file
Blocklisted process makes network request
Malware Config
Dropper Extraction:
https://z.zz.ht/nlOiE.jpg
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/2f99e627f3cf5b119435e4e247366ccd20a0379c6fa47673cbd66976693ecee1

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:INDICATOR_SUSPICIOUS_GENInfoStealer
Create hunting rule
Author:ditekSHen
Description:Detects executables containing common artifcats observed in infostealers
Rule name:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
Rule name:MALWARE_Win_QuasarRAT
Create hunting rule
Author:ditekSHen
Description:QuasarRAT payload
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.

Malspam

QuasarRAT

iso ce5be98bf208210bd0d1ba828d907f30064597f09be41d5881c082ea16101894

QuasarRAT

Visual Basic Script (vbs) vbs 2f99e627f3cf5b119435e4e247366ccd20a0379c6fa47673cbd66976693ecee1

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/954554/
  
Dropped by
MD5 45b144a45f0b107f4042f4a3f0ca4fa7
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/111377/
  
Dropped by
SHA256 ce5be98bf208210bd0d1ba828d907f30064597f09be41d5881c082ea16101894

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