MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 42a913fedb31db5ba0cf28abd0fe6afc3b9807aac7045a1c02579c2b3282a3b1. 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: 18


Intelligence 18 IOCs YARA 23 File information Comments
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SHA256 hash: 42a913fedb31db5ba0cf28abd0fe6afc3b9807aac7045a1c02579c2b3282a3b1
SHA3-384 hash: aaf4e9e46915e6c7361cd36010caecb25839b0388ddc1f694dac4e35a508bb2c411fe0c961d44e70d1114dd9fc75c070
SHA1 hash: cc78ac6b4974bb3352890b8e89d038ddc4c4eae4
MD5 hash: 6940c38a8661b0b8713afd4c63b12456
humanhash: juliet-glucose-minnesota-equal
File name:6940c38a8661b0b8713afd4c63b12456.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:3'266'048 bytes
First seen:2024-08-11 06:58:10 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 49152:3vWlL26AaNeWgPhlmVqvMQ7XSKUR8wbR4LoGdvRmTHHB72eh2NT:3vWL26AaNeWgPhlmVqkQ7XSKUR83
Threatray 779 similar samples on MalwareBazaar
TLSH T1DFE55C143BF85E27E1BBE277D5B0041267F0FC1AB3A3EB0B658167791C93B5098426A7
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 abuse_ch
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
339
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
quasar
Create hunting rule
ID:
1
File name:
713e742f7314ca8d684137f996540b4b.exe
Verdict:
Malicious activity
Analysis date:
2024-08-11 07:09:47 UTC
Tags:
quasar xworm rat dcrat remote darkcrystal orcus asyncrat
Link:
https://app.any.run/tasks/6f396a58-08af-4699-8090-6b3f4f29cdfe

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Malware.Generic-9883083-0
Create hunting rule

Win.Malware.Msilheracles-9900242-0
Create hunting rule

ditekSHen.MALWARE.Win.Trojan.QuasarStealer.UNOFFICIAL
Create hunting rule

Win.Packed.Downeks-6898097-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66b86140aa5b40be0aa0019e
Tags:
Execution Generic Network Stealth Msil
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm certreq crypto expand explorer hook infostealer keylogger lolbin quasar quasarrat rat remote schtasks stealer stealer
Link:
https://www.filescan.io/uploads/66b8613b4cea245ec5b1571f/reports/1540828f-113f-497c-a1b1-7fe37897ac2c/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/42a913fedb31db5ba0cf28abd0fe6afc3b9807aac7045a1c02579c2b3282a3b1
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.
Gathering data
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1491203
Signature
AI detected suspicious sample
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
Sigma detected: Quasar
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 dnsIp2 2 Behavior Graph ID: 1491203 Sample: CqEAmSx6Cb.exe Startdate: 11/08/2024 Architecture: WINDOWS Score: 100 31 businesses-eric.gl.at.ply.gg 2->31 43 Found malware configuration 2->43 45 Malicious sample detected (through community Yara rule) 2->45 47 Antivirus / Scanner detection for submitted sample 2->47 49 7 other signatures 2->49 9 CqEAmSx6Cb.exe 5 2->9         started        13 Client.exe 3 2->13         started        signatures3 process4 file5 27 C:\Windows\System32\SubDir\Client.exe, PE32 9->27 dropped 29 C:\Users\user\AppData\...\CqEAmSx6Cb.exe.log, CSV 9->29 dropped 51 Drops executables to the windows directory (C:\Windows) and starts them 9->51 53 Uses schtasks.exe or at.exe to add and modify task schedules 9->53 55 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->55 15 Client.exe 8 9->15         started        19 schtasks.exe 1 9->19         started        signatures6 process7 dnsIp8 33 businesses-eric.gl.at.ply.gg 147.185.221.21, 49704, 49712, 49713 SALSGIVERUS United States 15->33 35 Antivirus detection for dropped file 15->35 37 Multi AV Scanner detection for dropped file 15->37 39 Machine Learning detection for dropped file 15->39 41 2 other signatures 15->41 21 schtasks.exe 1 15->21         started        23 conhost.exe 19->23         started        signatures9 process10 process11 25 conhost.exe 21->25         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/42a913fedb31db5ba0cf28abd0fe6afc3b9807aac7045a1c02579c2b3282a3b1
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/42a913fedb31db5ba0cf28abd0fe6afc3b9807aac7045a1c02579c2b3282a3b1/
Threat name:
ByteCode-MSIL.Backdoor.Quasar
Create hunting rule
Status:
Malicious
First seen:
2024-08-06 17:38:02 UTC
AV detection:
21 of 24 (87.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ikurh7w3ghnvxigpfcv5b7tk7q5zqb5ky4cfuhack6ocwmucuoyq._file
Verdict:
malicious
Similar samples:
30c381a042e571d4d749f7aff6e1b17d77100ad35368c9a67136c1b5436c79cb
QuasarRAT
36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522
QuasarRAT
64f51e7b139ab5cf5829321a7ea0e7cc8aad04f1ec1d872345ee029e679dd2af
QuasarRAT
deebb3404de726f330e122ea377c38a79970788de0205b3ccfca1b8b99cf0291
QuasarRAT
f72153dbb753423e630840ed3674c6a0ce27b4ff5d1790a5bbb6d5707f9ed41e
QuasarRAT
f99ecbd9f26048dbb962f1711199e5f5d00ac8bbd87f539dd5a99631a15fadba
QuasarRAT
+ 769 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:office04 spyware trojan
Link:
https://tria.ge/reports/240811-hr3xxstdjc/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Enumerates physical storage devices
Drops file in System32 directory
Executes dropped EXE
Quasar RAT
Quasar payload
Malware Config
C2 Extraction:
businesses-eric.gl.at.ply.gg:55282
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/e3fdfceb-b7e5-47a6-a2ab-d7d80c663a81
Unpacked files
SH256 hash:
42a913fedb31db5ba0cf28abd0fe6afc3b9807aac7045a1c02579c2b3282a3b1
MD5 hash:
6940c38a8661b0b8713afd4c63b12456
SHA1 hash:
cc78ac6b4974bb3352890b8e89d038ddc4c4eae4
Detections:
QuasarRAT
Create hunting rule
malware_windows_xrat_quasarrat
Create hunting rule
win_quasarrat_j2
Create hunting rule
cn_utf8_windows_terminal
Create hunting rule
MAL_QuasarRAT_May19_1
Create hunting rule
Link:
https://www.unpac.me/results/c4ae0757-c366-42f6-b668-7540407a49fd/
Parent samples :
41bd2718e24b2367c4a29a6eb94045d4ce1e29b4d6ca99d7d2d8b14e316e18f5
42a913fedb31db5ba0cf28abd0fe6afc3b9807aac7045a1c02579c2b3282a3b1
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/42a913fedb31/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/42a913fedb31db5ba0cf28abd0fe6afc3b9807aac7045a1c02579c2b3282a3b1

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
Create hunting rule
Author:phoul (@phoul)
Description:Look for Blowfish constants
Rule name:Diff_QuasarRAT_01
Create hunting rule
Author:schmidtsz
Description:Identify QuasarRAT samples
Rule name:INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
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
Create hunting rule
Author:ditekSHen
Description:Detects executables containing common artifacts observed in infostealers
Rule name:MALWARE_Win_QuasarStealer
Create hunting rule
Author:ditekshen
Description:Detects Quasar infostealer
Rule name:MAL_QuasarRAT_May19_1
Create hunting rule
Description:Detects QuasarRAT malware
Rule name:MAL_QuasarRAT_May19_1
Create hunting rule
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
Create hunting rule
Author:Florian Roth
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:Multifamily_RAT_Detection
Create hunting rule
Author:Lucas Acha (http://www.lukeacha.com)
Description:Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:RC6_Constants
Create hunting rule
Author:chort (@chort0)
Description:Look for RC6 magic constants in binary
Reference:https://twitter.com/mikko/status/417620511397400576
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:SHA512_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA384/SHA512 constants
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Windows_Generic_Threat_803feff4
Create hunting rule
Author:Elastic Security
Rule name:win_quasar_rat_client
Create hunting rule
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.

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

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