MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4a43cb5a42dc1d8817d4887d659d99001ede14343263557381eb4399bcf10962. 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: 14


Intelligence 14 IOCs YARA 21 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4a43cb5a42dc1d8817d4887d659d99001ede14343263557381eb4399bcf10962
SHA3-384 hash: 229c76bf0f90507f181d11d8c85c539d164234ecfcb47b3df7a871d9b1b090f0b0a8c44cdbee40cb6d21f09b09bacb5c
SHA1 hash: 9903efb2cdbd4859b767d8ebd2571a915f855e1b
MD5 hash: c3679baa57a1f19a4a805e4f972d4623
humanhash: moon-grey-nebraska-music
File name:file
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:1'731'589 bytes
First seen:2023-01-30 13:18:12 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 00be6e6c4f9e287672c8301b72bdabf3 (116 x RedLineStealer, 70 x AsyncRAT, 55 x AgentTesla)
ssdeep 24576:TNA3R5drXDB5/Ak/l7Y6YxqD1nBDfb4OkLdVUkSiT4zL294AwIJrEjc1B2JrH/2:+59OSM6tHD4OaxSu4zw3JHaf2
TLSH T12F85F14162CFC0B3D16E3D39841AEA14612B6CFC3E14BA09639F7994FCFC54C9D2666A
TrID 89.0% (.EXE) WinRAR Self Extracting archive (4.x-5.x) (265042/9/39)
3.5% (.EXE) Win64 Executable (generic) (10523/12/4)
2.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
1.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
1.5% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon f8e4c688b4e4e8a4 (3 x QuasarRAT)
Reporter jstrosch
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
225
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
file
Verdict:
Malicious activity
Analysis date:
2023-01-30 13:24:02 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/2886d696-045f-4083-a16a-1553f960eff2

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
QuasarRAT
Create hunting rule
Link:
https://www.capesandbox.com/analysis/358344/
Detection(s):
SecuriteInfo.com.Troj.NanoCo_TZ.22029.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Searching for the window
Сreating synchronization primitives
Searching for synchronization primitives
Creating a file in the %AppData% directory
Running batch commands
Creating a process from a recently created file
Creating a file
Using the Windows Management Instrumentation requests
DNS request
Sending an HTTP GET request
Creating a file in the %AppData% subdirectories
Launching a process
Enabling the 'hidden' option for recently created files
Creating a process with a hidden window
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Query of malicious DNS domain
Sending a TCP request to an infection source
Enabling autorun by creating a file
Result
Malware family:
n/a
Score:
  6/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/64049/overview
Behaviour
MalwareBazaar
MeasuringTime
EvasionQueryPerformanceCounter
Verdict:
No Threat
Threat level:
  2/10
Confidence:
80%
Tags:
greyware overlay packed setupapi.dll shdocvw.dll shell32.dll
Link:
https://www.filescan.io/uploads/63d7c3c989bd67c10fdb8ab4/reports/48eee2fb-d51e-429b-9e53-7ad7d5857798/overview
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.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/59818857-6e07-4304-bb86-5599ac80ec2f
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1161618
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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
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 submitted file
Snort IDS alert for network traffic
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: 794371 Sample: file.exe Startdate: 30/01/2023 Architecture: WINDOWS Score: 100 61 Snort IDS alert for network traffic 2->61 63 Multi AV Scanner detection for domain / URL 2->63 65 Malicious sample detected (through community Yara rule) 2->65 67 5 other signatures 2->67 12 file.exe 8 2->12         started        15 sryshg.exe 2->15         started        process3 file4 51 C:\Users\user\AppData\...\sryshg.sfx.exe, PE32 12->51 dropped 17 cmd.exe 1 12->17         started        19 sryshg.exe 15->19         started        process5 dnsIp6 23 sryshg.sfx.exe 7 17->23         started        26 conhost.exe 17->26         started        53 ip-api.com 19->53 69 Hides that the sample has been downloaded from the Internet (zone.identifier) 19->69 signatures7 process8 file9 49 C:\Users\user\AppData\Roaming\sryshg.exe, PE32 23->49 dropped 28 sryshg.exe 1 23->28         started        process10 signatures11 75 May check the online IP address of the machine 28->75 77 Machine Learning detection for dropped file 28->77 79 Uses schtasks.exe or at.exe to add and modify task schedules 28->79 81 Injects a PE file into a foreign processes 28->81 31 sryshg.exe 15 4 28->31         started        process12 dnsIp13 55 ip-api.com 208.95.112.1, 49695, 49704, 80 TUT-ASUS United States 31->55 57 192.168.2.1 unknown unknown 31->57 47 C:\Users\user\AppData\Roaming\cji\hvi.exe, PE32 31->47 dropped 59 Hides that the sample has been downloaded from the Internet (zone.identifier) 31->59 36 hvi.exe 1 31->36         started        39 schtasks.exe 1 31->39         started        file14 signatures15 process16 signatures17 71 Machine Learning detection for dropped file 36->71 73 Injects a PE file into a foreign processes 36->73 41 hvi.exe 36->41         started        43 conhost.exe 39->43         started        process18 process19 45 WerFault.exe 24 11 41->45         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4a43cb5a42dc1d8817d4887d659d99001ede14343263557381eb4399bcf10962/
Threat name:
ByteCode-MSIL.Trojan.Uztuby
Create hunting rule
Status:
Malicious
First seen:
2023-01-30 13:19:09 UTC
File Type:
PE (Exe)
Extracted files:
14
AV detection:
19 of 26 (73.08%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jjb4wwsc3qoyqf6urb6wlhmzaapn4fbugjrvk44b5nbztphrbfra._file
Verdict:
malicious
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:owl2 spyware trojan
Link:
https://tria.ge/reports/230130-qkkf1acb9y/
Behaviour
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Looks up external IP address via web service
Checks computer location settings
Loads dropped DLL
Executes dropped EXE
Quasar RAT
Quasar payload
Malware Config
C2 Extraction:
dnuocc.com:64594
www.dnuocc.com:64594
dnuocc.com:64588
Unpacked files
SH256 hash:
e85b559588dd31527232cccfef1ee413d9af454bed717e495d91e7180596d18a
MD5 hash:
6c4d00568eab59d4c010a8b36e632c74
SHA1 hash:
ad4c14c81feef55741e0f0fe48296e9f58492733
Link:
https://www.unpac.me/results/dd0d3646-7451-4dff-a1f4-7884109b48ae/
SH256 hash:
c100c546ccc5264f74da0f9915c45598b07cc61a14558eb0359f4d6c5ede5ee2
MD5 hash:
5903518d0df33fbfd9e28628d0bae599
SHA1 hash:
888d57ccdac12c460e68a3cd992a059c23a14e0a
Link:
https://www.unpac.me/results/dd0d3646-7451-4dff-a1f4-7884109b48ae/
SH256 hash:
c9af47be87d363f71d5fef24b64ba8498eeb28d183d2889bcfaf4fc371f64182
MD5 hash:
1d3a23e710cb10f91b31d06e12116897
SHA1 hash:
7d0ab05a7bae559c9115eb27c5eb27434cfed4df
Link:
https://www.unpac.me/results/dd0d3646-7451-4dff-a1f4-7884109b48ae/
SH256 hash:
fdb7865b933ca403988dfa5e9b5bc1a7b119d4ba015f984799f2ab9c9c05fe41
MD5 hash:
3ceb8483c59c15269da3fa43af0bc23b
SHA1 hash:
08061538e850699c04d405a2f038d3d532d17f69
Link:
https://www.unpac.me/results/dd0d3646-7451-4dff-a1f4-7884109b48ae/
SH256 hash:
4a43cb5a42dc1d8817d4887d659d99001ede14343263557381eb4399bcf10962
MD5 hash:
c3679baa57a1f19a4a805e4f972d4623
SHA1 hash:
9903efb2cdbd4859b767d8ebd2571a915f855e1b
Link:
https://www.unpac.me/results/dd0d3646-7451-4dff-a1f4-7884109b48ae/
Malware family:
xRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4a43cb5a42dc/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/4a43cb5a42dc1d8817d4887d659d99001ede14343263557381eb4399bcf10962

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:CN_disclosed_20180208_KeyLogger_1_RID3227
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_EXE_NoneWindowsUA
Create hunting rule
Author:ditekSHen
Description:Detects Windows executables referencing non-Windows User-Agents
Rule name:INDICATOR_SUSPICIOUS_GENInfoStealer
Create hunting rule
Author:ditekSHen
Description:Detects executables containing common artifcats observed in infostealers
Rule name:malware_Quasar_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect QuasarRAT in memory
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:MAL_QuasarRAT_May19_1_RID2E1E
Create hunting rule
Author:Florian Roth
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:pdb_YARAify
Create hunting rule
Author:@wowabiy314
Description:PDB
Rule name:pe_imphash
Create hunting rule
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_1_RID2B54
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:Quasar_RAT_2_RID2B55
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:sfx_pdb
Create hunting rule
Author:@razvialex
Description:Detect interesting files containing sfx with pdb paths.
Rule name:sfx_pdb_winrar_restrict
Create hunting rule
Author:@razvialex
Description:Detect interesting files containing sfx with pdb paths.
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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:Windows_Trojan_Quasarrat_e52df647
Create hunting rule
Author:Elastic Security
Rule name:xRAT_1
Create hunting rule
Author:Florian Roth
Description:Detects Patchwork malware
Reference:https://goo.gl/Pg3P4W
Rule name:xRAT_1_RID2900
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 4a43cb5a42dc1d8817d4887d659d99001ede14343263557381eb4399bcf10962

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/358344/
  
URLhaus
https://urlhaus.abuse.ch/url/2520962/

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