MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b1b8e318f9410ec883b219bbc2ef09268477d33b68567ab721e9747b49a05f1e. 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: 12


Intelligence 12 IOCs YARA 17 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b1b8e318f9410ec883b219bbc2ef09268477d33b68567ab721e9747b49a05f1e
SHA3-384 hash: bfcf9da9f755aae575072b2fe81274da5d752334e4de41e8bee5cddbeb50f58d7cdb4b1bddcc7468d4caa77b9ccb242c
SHA1 hash: 8699890bc611573db80ead175c9afc29ff7dffda
MD5 hash: b065bb1a52058a02341a9296d57b4be6
humanhash: mirror-monkey-uranus-kansas
File name:b065bb1a52058a02341a9296d57b4be6.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:2'280'448 bytes
First seen:2025-07-02 04:15:48 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 24576:S/8SWeWBRYRR1qJ10m8yXP8oc5R2NntxO0KKSb7yviUSQaBaOwIRxl2S62/90yFP:wW7YRnirm2NnPlKKSb7L3wip6MaRFKq
TLSH T1BEB5BF203DEB401AF1B7AF75DAD074DA9B6EF223770A965E149103470E13A41EEC723A
TrID 58.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
13.2% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
8.4% (.EXE) Win64 Executable (generic) (10522/11/4)
5.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.0% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika pebin
dhash icon cc8e337333338ecc (1 x QuasarRAT)
Reporter abuse_ch
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
14
Origin country :
SE SE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
https://get-solara.dev/BootstrapperNew.exe
Verdict:
Malicious activity
Analysis date:
2025-06-28 00:09:01 UTC
Tags:
evasion
Link:
https://app.any.run/tasks/66924afd-60dc-48cd-828c-f9d24ec2b9a9

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/11885/
Detection(s):
Win.Malware.Generic-9883083-0
Create hunting rule

Win.Malware.Bulz-9933026-0
Create hunting rule

Win.Malware.Generic-6623004-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6864b29bc9eb974737654b84
Tags:
autorun emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Launching a process
Creating a process from a recently created file
Creating a file
Connection attempt to an infection source
DNS request
Connection attempt
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Unauthorized injection to a recently created process
Query of malicious DNS domain
Sending a TCP request to an infection source
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm base64 hacktool obfuscated packed packed privilege quasarrat reconnaissance
Link:
https://www.filescan.io/uploads/6864b299714e106cecb9774d/reports/cd2d49ee-0b54-40a0-a0c4-31a5f1392134/overview
Verdict:
Malicious
Labled as:
IL:Trojan.MSILZilla
Link:
https://www.hybrid-analysis.com/sample/b1b8e318f9410ec883b219bbc2ef09268477d33b68567ab721e9747b49a05f1e
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3b85d6cf-2098-46e2-b667-116402dd2d4e
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1726843
Signature
.NET source code contains potential unpacker
Antivirus detection for dropped file
Connects to many ports of the same IP (likely port scanning)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs new ROOT certificates
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1726843 Sample: ngrwKErwDk.exe Startdate: 02/07/2025 Architecture: WINDOWS Score: 100 46 course-mounted.gl.at.ply.gg 2->46 48 ipwho.is 2->48 50 bg.microsoft.map.fastly.net 2->50 64 Found malware configuration 2->64 66 Antivirus detection for dropped file 2->66 68 Multi AV Scanner detection for submitted file 2->68 70 5 other signatures 2->70 9 ngrwKErwDk.exe 5 2->9         started        13 Solara.exe 3 2->13         started        signatures3 process4 file5 42 C:\Users\user\AppData\Roaming\...\Solara.exe, PE32 9->42 dropped 44 C:\Users\user\AppData\...\ngrwKErwDk.exe.log, CSV 9->44 dropped 72 Uses schtasks.exe or at.exe to add and modify task schedules 9->72 74 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->74 15 Solara.exe 14 12 9->15         started        20 schtasks.exe 1 9->20         started        signatures6 process7 dnsIp8 52 course-mounted.gl.at.ply.gg 147.185.221.29, 12587, 49686, 49691 SALSGIVERUS United States 15->52 54 ipwho.is 15.204.213.5, 443, 49688 HP-INTERNET-ASUS United States 15->54 40 C:\Users\user\AppData\...\fMbtQn5a6I44.bat, DOS 15->40 dropped 56 Multi AV Scanner detection for dropped file 15->56 58 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 15->58 60 Installs new ROOT certificates 15->60 62 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->62 22 cmd.exe 1 15->22         started        24 schtasks.exe 1 15->24         started        26 schtasks.exe 1 15->26         started        28 conhost.exe 20->28         started        file9 signatures10 process11 process12 30 conhost.exe 22->30         started        32 timeout.exe 1 22->32         started        34 chcp.com 1 22->34         started        36 conhost.exe 24->36         started        38 conhost.exe 26->38         started       
Score:
98%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b1b8e318f9410ec883b219bbc2ef09268477d33b68567ab721e9747b49a05f1e
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
.Net Executable PE (Portable Executable) Win 32 Exe x86
Link:
https://app.malva.re/file/b065bb1a52058a02341a9296d57b4be6
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b1b8e318f9410ec883b219bbc2ef09268477d33b68567ab721e9747b49a05f1e/
Threat name:
Win32.Trojan.Kepavll
Create hunting rule
Status:
Malicious
First seen:
2025-06-25 15:45:00 UTC
File Type:
PE (.Net Exe)
Extracted files:
5
AV detection:
29 of 36 (80.56%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wg4ogghziehmra5sdg54f3yje2chpuz3nblhvnzb5f2hwsnal4pa._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/250702-ev1eeshj5t/
Behaviour
Modifies system certificate store
Scheduled Task/Job: Scheduled Task
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Executes dropped EXE
Verdict:
Unknown
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/c9f66abc-d626-49c0-9bd9-9f4f5b3c568b
Unpacked files
SH256 hash:
b1b8e318f9410ec883b219bbc2ef09268477d33b68567ab721e9747b49a05f1e
MD5 hash:
b065bb1a52058a02341a9296d57b4be6
SHA1 hash:
8699890bc611573db80ead175c9afc29ff7dffda
Link:
https://www.unpac.me/results/b81fa4c9-d338-42de-a216-0d0e413d8848/
SH256 hash:
cb5ed3639ac0e5cc97d91267872a549bf135ccaa41542fdcb99bb2286b22fa71
MD5 hash:
86b48de901de38fc1d19bd63d215d037
SHA1 hash:
6bc0780a5c34126bb35948a4e3f96d90c9a7f965
Detections:
SUSP_NET_Large_Static_Array_In_Small_File_Jan24
Create hunting rule
HKTL_NET_GUID_Quasar
Create hunting rule
Link:
https://www.unpac.me/results/b81fa4c9-d338-42de-a216-0d0e413d8848/
Parent samples :
234c27282540fce4e90e597643213f70e86a028f155ac6796abcd5d88b3e53d0
f7a72e7cf98d0c0d7c58af1662b0e1724ba344e9089a12d3437de02520e63a3a
b1b8e318f9410ec883b219bbc2ef09268477d33b68567ab721e9747b49a05f1e
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/b1b8e318f9410ec883b219bbc2ef09268477d33b68567ab721e9747b49a05f1e

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:Costura_Protobuf
Create hunting rule
Author:@bartblaze
Description:Identifies Costura and Protobuf in .NET assemblies, respectively for storing resources and (de)serialization. Seen together might indicate a suspect binary.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:Detect_PowerShell_Obfuscation
Create hunting rule
Author:daniyyell
Description:Detects obfuscated PowerShell commands commonly used in malicious scripts.
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:INDICATOR_EXE_Packed_Fody
Create hunting rule
Author:ditekSHen
Description:Detects executables manipulated with Fody
Rule name:Indicator_MiniDumpWriteDump
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects PE files and PowerShell scripts that use MiniDumpWriteDump either through direct imports or string references
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:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
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)

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/11885/

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 (GUARD_CF)high

Comments