MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c328534fe8df97ccd8ff9fec54f6760f2aa9c0af3f4aa49268d83c1bbafcde19. 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: 17


Intelligence 17 IOCs YARA 20 File information Comments
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SHA256 hash: c328534fe8df97ccd8ff9fec54f6760f2aa9c0af3f4aa49268d83c1bbafcde19
SHA3-384 hash: a0f68ca576a2cdb938d85d4e8c8be2f7e384165310125ff70a91737dd9f5529c45894de2bdda5b1b92ce36111e7e7072
SHA1 hash: 6481ba3c76ec8b2c29baa40dd2c21a00bb0c031f
MD5 hash: a168c79cb0994efc2f80bd9b6f951e76
humanhash: nine-mobile-pip-black
File name:Client.exe
Download: download sample
Signature QuasarRAT
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File size:3'265'536 bytes
First seen:2024-01-08 09:58:56 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'665 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 49152:ovtI22SsaNYfdPBldt698dBcjH631xbRkpoGdpcwJTHHB72eh2NT:ovm22SsaNYfdPBldt6+dBcjH631Uy
TLSH T198E55B143BF85F27E1BBE27795B0041267F0FC1AB3A3EB0B658167791C93B5098426A7
TrID 37.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
29.5% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
8.4% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
6.7% (.SCR) Windows screen saver (13097/50/3)
5.3% (.EXE) Win64 Executable (generic) (10523/12/4)
Reporter smica83
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
320
Origin country :
HU HU
Vendor Threat Intelligence
Detection:
QuasarStealer
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Link:
https://www.capesandbox.com/analysis/469854/
Detection(s):
Win.Malware.Generic-9883083-0
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Win.Malware.Msilheracles-9900242-0
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ditekSHen.MALWARE.Win.Trojan.QuasarStealer.UNOFFICIAL
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Win.Packed.Downeks-6898097-0
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a file in the system32 subdirectories
Launching a process
Sending a custom TCP request
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm certreq control crypto expand explorer hook infostealer keylogger lolbin quasar quasarrat rat remote replace schtasks stealer stealer
Link:
https://www.filescan.io/uploads/659bc76b99da41ccd7ca9134/reports/185d4aaf-0a22-45df-a447-a493312c967c/overview
Verdict:
Malicious
Labled as:
MSIL.PasswordStealerA.Generic
Link:
https://www.hybrid-analysis.com/sample/c328534fe8df97ccd8ff9fec54f6760f2aa9c0af3f4aa49268d83c1bbafcde19
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.
Malware family:
Quasar RAT
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/fbb9683f-5cd6-48e3-b433-cfc245e77df7
Result
Threat name:
Quasar
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Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1371139
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Drops executables to the windows directory (C:\Windows) and starts them
Found malware configuration
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)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Query firmware table information (likely to detect VMs)
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: 1371139 Sample: Client.exe Startdate: 08/01/2024 Architecture: WINDOWS Score: 100 33 Found malware configuration 2->33 35 Malicious sample detected (through community Yara rule) 2->35 37 Antivirus / Scanner detection for submitted sample 2->37 39 5 other signatures 2->39 8 Client.exe 5 2->8         started        12 SubDir.exe 3 2->12         started        process3 file4 29 C:\Windows\System32\SubDir\SubDir.exe, PE32 8->29 dropped 43 Drops executables to the windows directory (C:\Windows) and starts them 8->43 45 Uses schtasks.exe or at.exe to add and modify task schedules 8->45 47 Hides that the sample has been downloaded from the Internet (zone.identifier) 8->47 14 SubDir.exe 2 8->14         started        18 schtasks.exe 1 8->18         started        signatures5 process6 dnsIp7 31 109.55.109.94, 4782 ASN-TIMServiceProviderIT Italy 14->31 49 Antivirus detection for dropped file 14->49 51 Multi AV Scanner detection for dropped file 14->51 53 Machine Learning detection for dropped file 14->53 55 2 other signatures 14->55 20 MoUsoCoreWorker.exe 19 14->20         started        23 schtasks.exe 1 14->23         started        25 conhost.exe 18->25         started        signatures8 process9 signatures10 41 Query firmware table information (likely to detect VMs) 20->41 27 conhost.exe 23->27         started        process11
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c328534fe8df97ccd8ff9fec54f6760f2aa9c0af3f4aa49268d83c1bbafcde19
Detection:
quasar
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Link:
https://mwdb.cert.pl/sample/c328534fe8df97ccd8ff9fec54f6760f2aa9c0af3f4aa49268d83c1bbafcde19/
Threat name:
ByteCode-MSIL.Trojan.Quasar
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Status:
Malicious
First seen:
2024-01-08 09:59:09 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
29 of 37 (78.38%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ymufgt7i36l4zwh7t7wfj5twb4vktqfph5fkjeti3a6bxox43ymq._file
Verdict:
malicious
Result
Malware family:
quasar
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Score:
  10/10
Tags:
family:quasar botnet:client spyware trojan
Link:
https://tria.ge/reports/240108-lz3hxafeep/
Behaviour
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Drops file in System32 directory
Executes dropped EXE
Quasar RAT
Quasar payload
Malware Config
C2 Extraction:
109.55.109.94:4782
Unpacked files
SH256 hash:
c328534fe8df97ccd8ff9fec54f6760f2aa9c0af3f4aa49268d83c1bbafcde19
MD5 hash:
a168c79cb0994efc2f80bd9b6f951e76
SHA1 hash:
6481ba3c76ec8b2c29baa40dd2c21a00bb0c031f
Detections:
QuasarRAT
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malware_windows_xrat_quasarrat
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win_quasarrat_j2
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MALWARE_Win_QuasarStealer
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cn_utf8_windows_terminal
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INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
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MAL_QuasarRAT_May19_1
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INDICATOR_SUSPICIOUS_Binary_References_Browsers
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INDICATOR_SUSPICIOUS_GENInfoStealer
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Link:
https://www.unpac.me/results/b86d3b6a-234a-42da-9d30-12a1a25cf335/
Malware family:
QuasarRAT
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c328534fe8df/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/c328534fe8df97ccd8ff9fec54f6760f2aa9c0af3f4aa49268d83c1bbafcde19

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:BLOWFISH_Constants
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Author:phoul (@phoul)
Description:Look for Blowfish constants
Rule name:Diff_QuasarRAT_01
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Author:schmidtsz
Description:Identify QuasarRAT samples
Rule name:INDICATOR_SUSPICIOUS_Binary_References_Browsers
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Author:ditekSHen
Description:Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
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
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Author:ditekSHen
Description:Detects executables containing common artifacts observed in infostealers
Rule name:MALWARE_Win_QuasarStealer
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Author:ditekshen
Description:Detects Quasar infostealer
Rule name:MAL_QuasarRAT_May19_1
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Description:Detects QuasarRAT malware
Rule name:MAL_QuasarRAT_May19_1
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Author:Florian Roth (Nextron Systems)
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:MAL_QuasarRAT_May19_1_RID2E1E
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Author:Florian Roth
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:MD5_Constants
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Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:Multifamily_RAT_Detection
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Author:Lucas Acha (http://www.lukeacha.com)
Description:Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables
Rule name:NET
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Author:malware-lu
Rule name:NETexecutableMicrosoft
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Author:malware-lu
Rule name:pe_imphash
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Rule name:RC6_Constants
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Author:chort (@chort0)
Description:Look for RC6 magic constants in binary
Reference:https://twitter.com/mikko/status/417620511397400576
Rule name:RIPEMD160_Constants
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Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
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Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:SHA512_Constants
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Author:phoul (@phoul)
Description:Look for SHA384/SHA512 constants
Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash
Rule name:win_quasar_rat_client
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Author:Matthew @ Embee_Research
Description:Detects strings present in Quasar Rat Samples.

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/469854/

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