MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b76f0646dca066e84a66453203e8bb4f4b515f6d48d112f99b4a9f2e92abb394. 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: 13


Intelligence 13 IOCs YARA 17 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b76f0646dca066e84a66453203e8bb4f4b515f6d48d112f99b4a9f2e92abb394
SHA3-384 hash: 18632bc00258efe2bd8ac90dbe9bef9cc5c171ed6fe4c921200cbb5c2c3ca0ae1614cc0591cd2f26bfd760b1c8cb4b69
SHA1 hash: 8e6b25d661294a1a879be764e1b9b5e667bad80d
MD5 hash: 8475901ea9c5894d32d8c373975d0aa9
humanhash: jig-fillet-harry-low
File name:GrimCrackFixer.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:2'280'960 bytes
First seen:2025-08-08 10:58:20 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 49152:RLO7fRbirmGNn4+KK8U7Lbwa+bXaCCXT:RL2QhNnWK8U7LbwbrBCX
Threatray 76 similar samples on MalwareBazaar
TLSH T1BCB5BF243DEA901AF1B7AF75DBD074DB9A6EF2237706964D148503860E23A41EDC723E
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
Reporter burger
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
51
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
GrimCrackFixer.exe
Verdict:
No threats detected
Analysis date:
2025-08-08 10:58:16 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/190350ec-47d7-4f89-9a88-ff471921ebbe

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/19651/
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6895d8431e8a59ee04e76031
Tags:
autorun emotet quasar
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the Program Files subdirectories
Launching a process
Enabling the 'hidden' option for recently created files
Creating a process from a recently created file
Creating a file
Setting a keyboard event handler
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 privilege reconnaissance
Link:
https://www.filescan.io/uploads/6895d85d9ef4d2ff7cf268c3/reports/10ffa750-29d9-49e3-a4cb-02d959f79438/overview
Verdict:
Malicious
Labled as:
IL:Trojan.MSILZilla
Link:
https://www.hybrid-analysis.com/sample/b76f0646dca066e84a66453203e8bb4f4b515f6d48d112f99b4a9f2e92abb394
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/cc045f70-24c6-4289-bb87-dd51dd0adb50
Result
Threat name:
Blank Grabber, Quasar, Umbral Stealer
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1752923
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Creates files with lurking names (e.g. Crack.exe)
Drops PE files to the startup folder
Drops PE files with a suspicious file extension
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Modifies the hosts file
Modifies Windows Defender protection settings
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
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Powershell Defender Disable Scan Feature
Sigma detected: Suspicious Startup Folder Persistence
Suricata IDS alerts for network traffic
Suspicious powershell command line found
Tries to harvest and steal browser information (history, passwords, etc)
Uses attrib.exe to hide files
Uses ping.exe to check the status of other devices and networks
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Blank Grabber
Yara detected Generic Downloader
Yara detected Quasar RAT
Yara detected Umbral Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1752923 Sample: GrimCrackFixer.exe Startdate: 08/08/2025 Architecture: WINDOWS Score: 100 81 xenquz-46850.portmap.host 2->81 83 ipwho.is 2->83 85 3 other IPs or domains 2->85 97 Suricata IDS alerts for network traffic 2->97 99 Found malware configuration 2->99 101 Malicious sample detected (through community Yara rule) 2->101 103 22 other signatures 2->103 10 GrimCrackFixer.exe 5 2->10         started        14 WindowsDefenderServices.exe 3 2->14         started        signatures3 process4 file5 73 C:\...\WindowsDefenderServices.exe, PE32 10->73 dropped 75 C:\Users\user\...behaviorgraphrimCrackFixer.exe.log, CSV 10->75 dropped 117 Creates files with lurking names (e.g. Crack.exe) 10->117 119 Uses schtasks.exe or at.exe to add and modify task schedules 10->119 121 Hides that the sample has been downloaded from the Internet (zone.identifier) 10->121 16 WindowsDefenderServices.exe 15 12 10->16         started        21 schtasks.exe 1 10->21         started        signatures6 process7 dnsIp8 77 xenquz-46850.portmap.host 193.161.193.99, 46850, 49720 BITREE-ASRU Russian Federation 16->77 79 ipwho.is 15.204.213.5, 443, 49722 HP-INTERNET-ASUS United States 16->79 67 C:\Program Files (x86)\...\alload.exe, PE32 16->67 dropped 91 Found many strings related to Crypto-Wallets (likely being stolen) 16->91 93 Hides that the sample has been downloaded from the Internet (zone.identifier) 16->93 95 Installs a global keyboard hook 16->95 23 alload.exe 14 10 16->23         started        28 MpCmdRun.exe 1 16->28         started        30 schtasks.exe 1 16->30         started        32 alload.exe 16->32         started        34 conhost.exe 21->34         started        file9 signatures10 process11 dnsIp12 87 ip-api.com 208.95.112.1, 49726, 80 TUT-ASUS United States 23->87 89 discord.com 162.159.137.232, 443, 49727 CLOUDFLARENETUS United States 23->89 69 C:\ProgramData\Microsoft\...behaviorgraphUPC5.scr, PE32 23->69 dropped 71 C:\Windows\System32\drivers\etc\hosts, ASCII 23->71 dropped 109 Suspicious powershell command line found 23->109 111 Found many strings related to Crypto-Wallets (likely being stolen) 23->111 113 Tries to harvest and steal browser information (history, passwords, etc) 23->113 115 3 other signatures 23->115 36 powershell.exe 23->36         started        39 cmd.exe 23->39         started        41 attrib.exe 23->41         started        47 8 other processes 23->47 43 conhost.exe 28->43         started        45 conhost.exe 30->45         started        file13 signatures14 process15 signatures16 105 Loading BitLocker PowerShell Module 36->105 49 conhost.exe 36->49         started        51 WmiPrvSE.exe 36->51         started        107 Uses ping.exe to check the status of other devices and networks 39->107 53 conhost.exe 39->53         started        55 PING.EXE 39->55         started        57 conhost.exe 41->57         started        59 conhost.exe 47->59         started        61 conhost.exe 47->61         started        63 conhost.exe 47->63         started        65 5 other processes 47->65 process17
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b76f0646dca066e84a66453203e8bb4f4b515f6d48d112f99b4a9f2e92abb394
Verdict:
inconclusive
YARA:
8 match(es)
Tags:
.Net Executable Fody/Costura Packer PDB Path PE (Portable Executable) SOS: 0.14 SOS: 0.15 SOS: 0.18 SOS: 0.19 SOS: 0.20 SOS: 0.22 SOS: 0.23 SOS: 0.24 SOS: 0.25 SOS: 0.26 SOS: 0.27 SOS: 0.29 SOS: 0.32 SOS: 0.34 SOS: 0.35 SOS: 0.61 Win 32 Exe x86
Link:
https://app.malva.re/file/8475901ea9c5894d32d8c373975d0aa9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b76f0646dca066e84a66453203e8bb4f4b515f6d48d112f99b4a9f2e92abb394/
Verdict:
Malicious
Threat:
HEUR:Trojan.MSIL.Quasar
Link:
https://tip.neiki.dev/file/b76f0646dca066e84a66453203e8bb4f4b515f6d48d112f99b4a9f2e92abb394
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-08-08 10:58:18 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
22 of 24 (91.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w5xqmrw4ubtoqstgiuzah2f3j5fvcx3njdirf6m3jkps5evlwoka._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
2d6903a6ab9162953059630ba9ea059da90b199e9c9c11a3fa5d8ae9b777c508
QuasarRAT
4ffb29bf50ade68db76b3ce13f8a4dfad2c1d72276af19abd6f62f2fd540be89
QuasarRAT
6ce2462286dc687b1ccab7592a3a68c0504b2639e28cfb8a849e0cd12763fea0
QuasarRAT
7607946bbdeb75cfa95d20ad272299405c86df13f17426fca36e4dfa6264d252
QuasarRAT
b76f0646dca066e84a66453203e8bb4f4b515f6d48d112f99b4a9f2e92abb394
QuasarRAT
ca161bb7ec1a3ff41ed793353b5b39f3d9fa3022b634c04f2eb41c1ca23a0c8b
QuasarRAT
error
QuasarRAT
+ 66 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
execution persistence
Link:
https://tria.ge/reports/250808-m81akser7z/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Drops file in Program Files directory
Executes dropped EXE
Verdict:
Malicious
Tags:
Win.Malware.Generic-9883083-0
YARA:
n/a
Link:
https://app.threat.zone/submission/6ff579eb-fefa-42cc-bfd4-09cef8805c0b
Unpacked files
SH256 hash:
b76f0646dca066e84a66453203e8bb4f4b515f6d48d112f99b4a9f2e92abb394
MD5 hash:
8475901ea9c5894d32d8c373975d0aa9
SHA1 hash:
8e6b25d661294a1a879be764e1b9b5e667bad80d
Link:
https://www.unpac.me/results/467794bf-4c40-49c2-ae75-8bfae5be70e5/
SH256 hash:
e54b3f90f18efaba3b4e714533d5e1f0aaf2f656b9166d6498e15b659cc41b8c
MD5 hash:
4a3c2b2b73407e79a9ebc6caece6c144
SHA1 hash:
70f64ab70fdc0c484da6f914d2742115c7a97141
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/467794bf-4c40-49c2-ae75-8bfae5be70e5/
Parent samples :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 hash:
d5235265564f0bfd23b7279d7bdccc9ea6383ed07c5d0bfdf6c99029af9a2c0c
MD5 hash:
1d3dd9fcc077e6b4f88c05b9aef53ee6
SHA1 hash:
12b33858bc84f54b8aa8dbcb5a0ec2da043a6f66
Link:
https://www.unpac.me/results/467794bf-4c40-49c2-ae75-8bfae5be70e5/
SH256 hash:
4c9615496970ea84320e2a6e99f8fb828e3c7790384df5585d93fc368885d94e
MD5 hash:
50e6524b7ee9c2c93f5210b63cb1ca54
SHA1 hash:
3e296ec3bb24750833ea80515e6fb4c73874c91a
Link:
https://www.unpac.me/results/467794bf-4c40-49c2-ae75-8bfae5be70e5/
SH256 hash:
c9736bed57d137a0bd4a454a70436020312db5a365bdd243037e766695c18ccd
MD5 hash:
41b34eab1585d5381c56730b93dd1310
SHA1 hash:
510b640517342dbcc40c81b63db23fa1444a71ed
Link:
https://www.unpac.me/results/467794bf-4c40-49c2-ae75-8bfae5be70e5/
SH256 hash:
0b1efc2fd317ed5ee30dada03b212df23560e602e54534861406e8c78f472d54
MD5 hash:
2f322d400fca934b784cd7e93209dba4
SHA1 hash:
6db4ffac4b70277b512faac68387c50a247d0a17
Link:
https://www.unpac.me/results/467794bf-4c40-49c2-ae75-8bfae5be70e5/
SH256 hash:
ceed689891874eed41295189b2db3c187aabcfc90add5a1d2af96f078bcb4811
MD5 hash:
026a5bafe4ac686c01e9d56e00a87ab1
SHA1 hash:
a6ff2228e8114a2b4040d0ca137c4b544ff034f4
Link:
https://www.unpac.me/results/467794bf-4c40-49c2-ae75-8bfae5be70e5/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b76f0646dca0/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: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/19651/

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