MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 676a40f2c599ffe574343860e190a7c293ade8e32cd83b66f6ff6f8d4c0b3a53. 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: 19


Intelligence 19 IOCs YARA 27 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 676a40f2c599ffe574343860e190a7c293ade8e32cd83b66f6ff6f8d4c0b3a53
SHA3-384 hash: 31541135dcd7d0373f1b51e1d5d8348a557c26a15c93e813842f11933511dc748a5ffee5832b259ce013c1965cd48a72
SHA1 hash: 1f565728bcc13bf1e49760c98bd96e15dacb42fc
MD5 hash: 0515143005b3e92fe50594bc1e30af7b
humanhash: wolfram-aspen-nineteen-sierra
File name:kys.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:3'404'586 bytes
First seen:2024-12-18 06:32:56 UTC
Last seen:2025-01-03 11:40:51 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 8c16c795b57934183422be5f6df7d891 (36 x Mofksys, 18 x CryptOne, 6 x AveMariaRAT)
ssdeep 49152:tevXI22SsaNYfdPBldt698dBcjH3c0TbRSLoGd7/THHB72eh2NTA:UvY22SsaNYfdPBldt6+dBcjH3c0SZ
Threatray 807 similar samples on MalwareBazaar
TLSH T1B0F56B143BF85F27E1BBE27795B0041267F0FC1AB3A3EB0B618167791C93B5158426AB
TrID 42.6% (.EXE) Win32 Executable (generic) (4504/4/1)
19.4% (.ICL) Windows Icons Library (generic) (2059/9)
18.9% (.EXE) Generic Win/DOS Executable (2002/3)
18.9% (.EXE) DOS Executable Generic (2000/1)
Magika pebin
dhash icon 00928e8e8686b800 (21 x Mofksys, 9 x CryptOne, 5 x Amadey)
Reporter lontze7
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
6
# of downloads :
521
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
asyncrat
Create hunting rule
ID:
1
File name:
241127-xqsswsslej_pw_infected.zip
Verdict:
Malicious activity
Analysis date:
2024-12-16 11:37:57 UTC
Tags:
arch-exec loader github telegram opendir auto asyncrat vidar stealer quasarrat lumma sliver miner payload hausbomber dcrat evasion amadey botnet jeefo rat njrat bladabindi neshta remcos tas17 upx mouseloader discord xworm meterpreter meduzastealer
Link:
https://app.any.run/tasks/f7345c34-d409-44f5-9b90-3c2bdd8ac2a9

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.Trojan.VBGeneric-6735875-0
Create hunting rule

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

Win.Trojan.Agent-1109049
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67626d70653a8698dfda6537
Tags:
infosteal autorun quasar swisyn
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Creating a window
Creating a file in the Windows subdirectories
Creating a file
Creating a process from a recently created file
Creating a file in the system32 subdirectories
Launching a process
Creating a process with a hidden window
Enabling the 'hidden' option for recently created files
Unauthorized injection to a recently created process
Setting a single autorun event
Enabling autorun by creating a file
Enabling a "Do not show hidden files" option
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm certreq expand explorer infostealer keylogger lolbin mofksys obfuscated overlay packed packer_detected quasarrat rat remote runonce schtasks stealer stealer swisyn virus visual_basic
Link:
https://www.filescan.io/uploads/67626c9f679f15c0f1856caa/reports/fb28763d-da41-44b6-801b-f0283c46323b/overview
Verdict:
Malicious
Labled as:
Gosys.B
Link:
https://www.hybrid-analysis.com/sample/676a40f2c599ffe574343860e190a7c293ade8e32cd83b66f6ff6f8d4c0b3a53
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/9ecb5ce0-e708-4c31-8763-0347ef57f08d
Result
Threat name:
CryptOne, Mofksys, Quasar
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1577150
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Changes security center settings (notifications, updates, antivirus, firewall)
Detected CryptOne packer
Drops executables to the windows directory (C:\Windows) and starts them
Drops PE files with benign system names
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects code into the Windows Explorer (explorer.exe)
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
PE file has a writeable .text section
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: Suspect Svchost Activity
Sigma detected: System File Execution Location Anomaly
System process connects to network (likely due to code injection or exploit)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected Generic Downloader
Yara detected Mofksys
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1577150 Sample: kys.exe Startdate: 18/12/2024 Architecture: WINDOWS Score: 100 75 time.windows.com 2->75 77 googlecode.l.googleusercontent.com 2->77 79 3 other IPs or domains 2->79 93 Found malware configuration 2->93 95 Malicious sample detected (through community Yara rule) 2->95 97 Antivirus detection for dropped file 2->97 99 14 other signatures 2->99 11 kys.exe 1 3 2->11         started        15 svchost.exe 2->15 injected 17 svchost.exe 2->17         started        19 7 other processes 2->19 signatures3 process4 file5 71 C:\Windows\Resources\Themes\icsys.icn.exe, MS-DOS 11->71 dropped 73 C:\Users\user\Desktop\kys.exe, PE32 11->73 dropped 131 Drops executables to the windows directory (C:\Windows) and starts them 11->131 21 icsys.icn.exe 3 11->21         started        25 kys.exe 6 11->25         started        133 Injects code into the Windows Explorer (explorer.exe) 15->133 27 consent.exe 15->27         started        29 explorer.exe 15->29         started        31 svchost.exe 15->31         started        135 Changes security center settings (notifications, updates, antivirus, firewall) 17->135 33 MpCmdRun.exe 17->33         started        35 explorer.exe 19->35         started        signatures6 process7 file8 61 C:\Windows\Resources\Themes\explorer.exe, MS-DOS 21->61 dropped 101 Antivirus detection for dropped file 21->101 103 Machine Learning detection for dropped file 21->103 105 Drops PE files with benign system names 21->105 37 explorer.exe 15 21->37         started        63 C:\Windows\System32\SubDir\victim.exe, MS-DOS 25->63 dropped 65 C:\Windows\...\victim.exe:Zone.Identifier, ASCII 25->65 dropped 67 C:\Users\user\AppData\Local\...\kys.exe .log, CSV 25->67 dropped 107 Drops executables to the windows directory (C:\Windows) and starts them 25->107 109 Hides that the sample has been downloaded from the Internet (zone.identifier) 25->109 42 victim.exe 1 25->42         started        44 schtasks.exe 1 25->44         started        111 Writes to foreign memory regions 27->111 46 conhost.exe 33->46         started        signatures9 process10 dnsIp11 81 64.233.164.82, 49704, 49731, 49754 GOOGLEUS United States 37->81 83 googlecode.l.googleusercontent.com 74.125.131.82, 49702, 49715, 49724 GOOGLEUS United States 37->83 69 C:\Windows\Resources\spoolsv.exe, MS-DOS 37->69 dropped 121 Antivirus detection for dropped file 37->121 123 System process connects to network (likely due to code injection or exploit) 37->123 125 Machine Learning detection for dropped file 37->125 127 Drops PE files with benign system names 37->127 48 spoolsv.exe 3 37->48         started        129 Multi AV Scanner detection for dropped file 42->129 52 conhost.exe 44->52         started        file12 signatures13 process14 file15 59 C:\Windows\Resources\svchost.exe, MS-DOS 48->59 dropped 85 Antivirus detection for dropped file 48->85 87 Multi AV Scanner detection for dropped file 48->87 89 Machine Learning detection for dropped file 48->89 91 Drops PE files with benign system names 48->91 54 svchost.exe 2 2 48->54         started        signatures16 process17 signatures18 113 Antivirus detection for dropped file 54->113 115 Detected CryptOne packer 54->115 117 Machine Learning detection for dropped file 54->117 119 Drops executables to the windows directory (C:\Windows) and starts them 54->119 57 spoolsv.exe 54->57         started        process19
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/676a40f2c599ffe574343860e190a7c293ade8e32cd83b66f6ff6f8d4c0b3a53
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/676a40f2c599ffe574343860e190a7c293ade8e32cd83b66f6ff6f8d4c0b3a53/
Threat name:
Win32.Trojan.Golsys
Create hunting rule
Status:
Malicious
First seen:
2024-12-16 12:25:59 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
24 of 24 (100.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=m5veb4wfth76k5buhbqodefhykj232hdftmdwzxw75xy2talhjjq._file
Verdict:
malicious
Label(s):
mofksys
Create hunting rule
quasarrat
Create hunting rule
Similar samples:
0071fd8f074a69e3145106a3a8607844e5bdafe96ad70e307d5b54c0094a0103
QuasarRAT
1707efe35749f4477db431f041481a46dd48d22431e6846f4e13bff760dc4033
QuasarRAT
3f94a886d4917d5cba86e9b604d001e649cc048286376c4cff495658d68b117a
QuasarRAT
52de83987941b92875cecdd1661cc2757eae4f02ef564fd2e147d06eb9d8ab44
QuasarRAT
575901f83294547395d2a53d741ecc756906c62a0d7e942890a23c833e0593de
QuasarRAT
5ee53e7e25a03aff5a92dd99804ecc38795f7513437e82be670b9e0b61a98ea4
QuasarRAT
b7974dfd10dea3d89979b441677202d9be7d5c9eab26df59b9d7afe27f56a290
QuasarRAT
error
QuasarRAT
f7112f236e9bae2fa1ca721ee1979d55c530944e6dfa42bc58b25072f2fa1025
QuasarRAT
+ 797 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:victim-hacked discovery evasion persistence spyware trojan
Link:
https://tria.ge/reports/241218-ha7jsaymfr/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
System Location Discovery: System Language Discovery
Drops file in Windows directory
Drops file in System32 directory
Adds Run key to start application
Executes dropped EXE
Loads dropped DLL
Modifies visiblity of hidden/system files in Explorer
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
192.168.100.2:4444
Verdict:
Malicious
Tags:
rat quasar_rat stealer trojan Win.Malware.Generic-9883083-0
YARA:
malware_windows_quasarrat MAL_QuasarRAT_May19_1 MALWARE_Win_Quasarstealer Windows_Generic_Threat_7526f106 Windows_Generic_Threat_cbe3313a
Link:
https://app.threat.zone/submission/6a417f13-78b5-4793-a8a6-3e6b5b72948a
Unpacked files
SH256 hash:
6a98d500eab158f232d41cc190cb13f96749f818995d3bc01477f4231d7c7254
MD5 hash:
5def20bc149e979f4c18e238edb01874
SHA1 hash:
813b5f3403652337ebf51b36f7c35c17a567786f
Detections:
QuasarRAT
Create hunting rule
cn_utf8_windows_terminal
Create hunting rule
malware_windows_xrat_quasarrat
Create hunting rule
MAL_QuasarRAT_May19_1
Create hunting rule
win_quasarrat_j2
Create hunting rule
win_quasar_rat_client
Create hunting rule
INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
INDICATOR_SUSPICIOUS_GENInfoStealer
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
MALWARE_Win_QuasarStealer
Create hunting rule
Link:
https://www.unpac.me/results/970f8dae-6d38-488a-a301-1c9d756740d3/
SH256 hash:
676a40f2c599ffe574343860e190a7c293ade8e32cd83b66f6ff6f8d4c0b3a53
MD5 hash:
0515143005b3e92fe50594bc1e30af7b
SHA1 hash:
1f565728bcc13bf1e49760c98bd96e15dacb42fc
Detections:
QuasarRAT
Create hunting rule
Link:
https://www.unpac.me/results/970f8dae-6d38-488a-a301-1c9d756740d3/
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/676a40f2c599/report/overview.html
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:BLOWFISH_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for Blowfish constants
Rule name:Detect_PowerShell_Obfuscation
Create hunting rule
Author:daniyyell
Description:Detects obfuscated PowerShell commands commonly used in malicious scripts.
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:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:quasarrat_kingrat
Create hunting rule
Author:jeFF0Falltrades
Rule name:RansomPyShield_Antiransomware
Create hunting rule
Author:XiAnzheng
Description:Check for Suspicious String and Import combination that Ransomware mostly abuse(can create FP)
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
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:SEH__vba
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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:SUSP_Imphash_Mar23_2
Create hunting rule
Author:Arnim Rupp (https://github.com/ruppde)
Description:Detects imphash often found in malware samples (Zero hits with with search for 'imphash:x p:0' on Virustotal)
Reference:Internal Research
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:Windows_Generic_Threat_7526f106
Create hunting rule
Author:Elastic Security
Rule name:Windows_Generic_Threat_803feff4
Create hunting rule
Author:Elastic Security
Rule name:Windows_Generic_Threat_cbe3313a
Create hunting rule
Author:Elastic Security

File information

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

Web download

QuasarRAT

Executable exe 676a40f2c599ffe574343860e190a7c293ade8e32cd83b66f6ff6f8d4c0b3a53

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3351827/
  
URLhaus
https://urlhaus.abuse.ch/url/3356173/

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_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
CHECK_TRUST_INFORequires Elevated Execution (level:requireAdministrator)high
Reviews
IDCapabilitiesEvidence
VB_APILegacy Visual Basic API usedMSVBVM60.DLL::__vbaCopyBytes
MSVBVM60.DLL::__vbaSetSystemError
MSVBVM60.DLL::__vbaExitProc
MSVBVM60.DLL::__vbaObjSetAddref
MSVBVM60.DLL::EVENT_SINK_AddRef
MSVBVM60.DLL::__vbaFileOpen

Comments