MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e6b8af13a9832030a6e769db896510df174c3450cc1ea9beffd59d052204e6c4. 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


UmbralStealer


Vendor detections: 17


Intelligence 17 IOCs YARA 35 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e6b8af13a9832030a6e769db896510df174c3450cc1ea9beffd59d052204e6c4
SHA3-384 hash: 03900f38c81a4daca72c8c6d411f8f09119af335247a064c154c9ebba9552ad73f1091243c2f48febb601b0c525fcc74
SHA1 hash: 6f03d308b00964e1f31646c3b959557ebe187793
MD5 hash: 1b0264c520fc38688898b4571e2607bb
humanhash: table-spaghetti-wyoming-queen
File name:MasonRootkit.exe
Download: download sample
Signature UmbralStealer
Create hunting rule
File size:438'784 bytes
First seen:2025-06-22 15:24:19 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:EoZtL+EP8GpFzQWRJ63vSgR1EAMS/5/gVziHlBrCbY58N:8I8iFzQWRJ63vSgR1EAdXbC
Threatray 319 similar samples on MalwareBazaar
TLSH T1C7946B56F2A441A7E16F87798D63170BA7B2F0339A11E7DF0E8448E83E237919C19B53
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10522/11/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
Reporter 5kidro0t
Tags:exe kryptik MSILZilla rootkit trojan UmbralStealer

Intelligence

File Origin
# of uploads :
1
# of downloads :
466
Origin country :
ES ES
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
tweakbetter1.exe
Verdict:
Malicious activity
Analysis date:
2025-06-22 15:18:28 UTC
Tags:
auto-sch evasion stealer discordgrabber generic umbralstealer umbral divulgestealer discord exfiltration ims-api
Link:
https://app.any.run/tasks/67cd2291-5c1d-4dcd-aaf3-179c829d473b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
UmbralStealer
Create hunting rule
Link:
https://www.capesandbox.com/analysis/10535/
Detection(s):
Win.Packed.Msilzilla-9952790-0
Create hunting rule

Win.Packed.Msilzilla-9955952-0
Create hunting rule

Win.Worm.DiscordSpreader-9964977-1
Create hunting rule

Win.Malware.Lazy-10008179-0
Create hunting rule

Win.Malware.Lazy-10008180-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=685820a6b06783b9ebd69c35
Tags:
vmdetect autorun emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Сreating synchronization primitives
Creating a process from a recently created file
Launching a process
Forced system process termination
Unauthorized injection to a recently created process
DNS request
Connection attempt
Sending a custom TCP request
Searching for synchronization primitives
Sending an HTTP GET request
Creating a window
Creating a file
Running batch commands
Setting browser functions hooks
Unauthorized injection to a system process
Enabling autorun by creating a file
Unauthorized injection to a browser process
Adding an exclusion to Microsoft Defender
Changing the hosts file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
adaptive-context anti-debug anti-vm anti-vm anti-vm base64 cmd exploit fingerprint fingerprint hacktool lolbin lolbin msbuild obfuscated obfuscated reconnaissance wmic
Link:
https://www.filescan.io/uploads/685821093faf8fcd7d3ae2c4/reports/d5fe9976-430c-4d23-819a-763b0b38a8d2/overview
Verdict:
Malicious
Labled as:
IL:Trojan.MSILZilla
Link:
https://www.hybrid-analysis.com/sample/e6b8af13a9832030a6e769db896510df174c3450cc1ea9beffd59d052204e6c4
Malware family:
Sharp Stealer
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/0823d02f-ab99-4066-95a5-e80efbc54f47
Result
Threat name:
Blank Grabber, Umbral Stealer
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1720308
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Check if machine is in data center or colocation facility
Contains functionality to compare user and computer (likely to detect sandboxes)
Contains functionality to inject code into remote processes
Creates a thread in another existing process (thread injection)
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Hooks files or directories query functions (used to hide files and directories)
Hooks processes query functions (used to hide processes)
Hooks registry keys query functions (used to hide registry keys)
Injects a PE file into a foreign processes
Injects code into the Windows Explorer (explorer.exe)
Installs new ROOT certificates
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected Blank Grabber
Yara detected Umbral Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1720308 Sample: MasonRootkit.exe Startdate: 22/06/2025 Architecture: WINDOWS Score: 100 57 ip-api.com 2->57 65 Suricata IDS alerts for network traffic 2->65 67 Found malware configuration 2->67 69 Malicious sample detected (through community Yara rule) 2->69 71 13 other signatures 2->71 8 MasonRootkit.exe 18 5 2->8         started        13 MasonRootkit.exe 4 4 2->13         started        signatures3 process4 dnsIp5 59 ip-api.com 208.95.112.1, 49688, 49690, 80 TUT-ASUS United States 8->59 51 C:\Users\user\AppData\...\ourtav4h.mn4.exe, PE32+ 8->51 dropped 53 C:\Users\user\...\MasonRootkit.exe.log, CSV 8->53 dropped 73 Uses schtasks.exe or at.exe to add and modify task schedules 8->73 15 ourtav4h.mn4.exe 1 8->15         started        18 schtasks.exe 1 8->18         started        20 schtasks.exe 1 8->20         started        22 WMIC.exe 8->22         started        55 C:\Users\user\AppData\...\ml1vshin.bpd.exe, PE32+ 13->55 dropped 24 ml1vshin.bpd.exe 13->24         started        26 schtasks.exe 13->26         started        28 schtasks.exe 13->28         started        30 WMIC.exe 13->30         started        file6 signatures7 process8 signatures9 75 Antivirus detection for dropped file 15->75 77 Multi AV Scanner detection for dropped file 15->77 79 Contains functionality to inject code into remote processes 15->79 87 4 other signatures 15->87 32 lsass.exe 6 15->32 injected 47 3 other processes 15->47 35 conhost.exe 18->35         started        37 conhost.exe 20->37         started        39 conhost.exe 22->39         started        81 Injects code into the Windows Explorer (explorer.exe) 24->81 83 Writes to foreign memory regions 24->83 85 Allocates memory in foreign processes 24->85 49 22 other processes 24->49 41 conhost.exe 26->41         started        43 conhost.exe 28->43         started        45 conhost.exe 30->45         started        process10 signatures11 61 Installs new ROOT certificates 32->61 63 Writes to foreign memory regions 32->63
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/e6b8af13a9832030a6e769db896510df174c3450cc1ea9beffd59d052204e6c4
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable PE (Portable Executable) Win 32 Exe x86
Link:
https://app.malva.re/file/1b0264c520fc38688898b4571e2607bb
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e6b8af13a9832030a6e769db896510df174c3450cc1ea9beffd59d052204e6c4/
Threat name:
ByteCode-MSIL.Trojan.UmbralStealer
Create hunting rule
Status:
Malicious
First seen:
2025-06-22 15:18:28 UTC
File Type:
PE (.Net Exe)
Extracted files:
5
AV detection:
24 of 24 (100.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=424k6e5jqmqdbjxhnhnysziq34luyncqzqpktpx72woqkiqe43ca._file
Verdict:
malicious
Label(s):
r77
Create hunting rule
umbral
Create hunting rule
Similar samples:
2aa37e753ce1273f6ee4968bec7e2381b79a85ffbd1ee3da1fe9b4c1ea3ec4cd
UmbralStealer
5f66d285b90dacd2a151476002d0448e556ce02f2ba263bfbd468bae9c444299
UmbralStealer
88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb
UmbralStealer
8e01f7dffad363fb7e0705819c89c9e3f2c1e340709cb2c827e441848453e38a
UmbralStealer
9d08e5e62b409ef1ccd05c7996eb5432e4a36f55642cb7441d153909e823f144
UmbralStealer
d8489d165b0f0912f45364a9e10ddbe292b7ed32afa6c6c2e6d86f89fb80be43
UmbralStealer
error
UmbralStealer
+ 309 additional samples on MalwareBazaar
Result
Malware family:
xworm
Create hunting rule
Score:
  10/10
Tags:
family:umbral family:xworm defense_evasion rat stealer trojan
Link:
https://tria.ge/reports/250622-stvz7stwaz/
Behaviour
Checks SCSI registry key(s)
Checks processor information in registry
Enumerates system info in registry
Modifies data under HKEY_USERS
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: LoadsDriver
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Enumerates physical storage devices
Drops file in System32 directory
Looks up external IP address via web service
Checks BIOS information in registry
Checks computer location settings
Executes dropped EXE
Indicator Removal: Clear Windows Event Logs
Detect Umbral payload
Detect Xworm Payload
Suspicious use of NtCreateProcessExOtherParentProcess
Suspicious use of NtCreateUserProcessOtherParentProcess
Umbral
Umbral family
Xworm
Xworm family
Malware Config
C2 Extraction:
https://discord.com/api/webhooks/1386271557747474532/88yxOt_cc50_r6m_cPB5JB1TDchpHP9tUOIoscNGsnpbY9S8Ltf4wrZdA7a7WI9OAeMg
Verdict:
Malicious
Tags:
rootkit stealer umbral trojan Win.Packed.Msilzilla-9952790-0
YARA:
Windows_Rootkit_R77_Be403E3C Windows_Rootkit_R77_d0367e28 MALWARE_Win_Umbralstealer MALWARE_Win_R77
Link:
https://app.threat.zone/submission/cdd6bbb8-a6dd-460a-bf8b-ecc27899b778
Unpacked files
SH256 hash:
e6b8af13a9832030a6e769db896510df174c3450cc1ea9beffd59d052204e6c4
MD5 hash:
1b0264c520fc38688898b4571e2607bb
SHA1 hash:
6f03d308b00964e1f31646c3b959557ebe187793
Detections:
UmbralStealer
Create hunting rule
Link:
https://www.unpac.me/results/51fc738f-fd0d-405c-a6f5-4cd0fdcc0312/
SH256 hash:
879cc20b41635709bb304e315aaa5ca4708b480a1bfc2f4935fcf2215188efb0
MD5 hash:
94f1ab3a068f83b32639579ec9c5d025
SHA1 hash:
38f3d5bc5de46feb8de093d11329766b8e2054ae
Detections:
MALWARE_Win_R77
Create hunting rule
Link:
https://www.unpac.me/results/51fc738f-fd0d-405c-a6f5-4cd0fdcc0312/
Parent samples :
3db6003aed5663530344f627592d7071efcece6ab608d114cd219d5b19f389a5
9d08e5e62b409ef1ccd05c7996eb5432e4a36f55642cb7441d153909e823f144
2aa37e753ce1273f6ee4968bec7e2381b79a85ffbd1ee3da1fe9b4c1ea3ec4cd
88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb
e6b8af13a9832030a6e769db896510df174c3450cc1ea9beffd59d052204e6c4
2f0ff1a3573cb45775b709b1e8df418ff7adcc5b678a52a768d02933b6174ca6
SH256 hash:
ecac0c91d0825919494b420be0b3f8b8e75dd96bb59cc9fc6504fdd332ffb700
MD5 hash:
f09042a3ba866f4f7062b23e70e0f5eb
SHA1 hash:
bcb3e863b07e1bd68f7c84305ff789610ce52cdb
Detections:
MALWARE_Win_R77
Create hunting rule
Link:
https://www.unpac.me/results/51fc738f-fd0d-405c-a6f5-4cd0fdcc0312/
Parent samples :
ade5c6fc5f35fa02723f1c302d019419a7bc0d9234a4291040846c7e3515eb78
3db6003aed5663530344f627592d7071efcece6ab608d114cd219d5b19f389a5
9d08e5e62b409ef1ccd05c7996eb5432e4a36f55642cb7441d153909e823f144
2aa37e753ce1273f6ee4968bec7e2381b79a85ffbd1ee3da1fe9b4c1ea3ec4cd
88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb
e6b8af13a9832030a6e769db896510df174c3450cc1ea9beffd59d052204e6c4
2f0ff1a3573cb45775b709b1e8df418ff7adcc5b678a52a768d02933b6174ca6
SH256 hash:
9a336d8f53049d26d182d969dd2c4fc4dbc4e068fd39805004b177e10bfa658d
MD5 hash:
a7bf3392aec9ecbaeef5f921d876bf4c
SHA1 hash:
a464b1fea09cf0967be6562de6fd7bc47a40f833
Detections:
UmbralStealer
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_SandboxUserNames
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_WMI_EnumerateVideoDevice
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_SandboxComputerNames
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_SandboxSystemUUIDs
Create hunting rule
MALWARE_Win_UmbralStealer
Create hunting rule
Link:
https://www.unpac.me/results/51fc738f-fd0d-405c-a6f5-4cd0fdcc0312/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/e6b8af13a983/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/e6b8af13a9832030a6e769db896510df174c3450cc1ea9beffd59d052204e6c4

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:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__MemoryWorkingSet
Create hunting rule
Author:Fernando Mercês
Description:Anti-debug process memory working set size check
Reference:http://www.gironsec.com/blog/2015/06/anti-debugger-trick-quicky/
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__SetConsoleCtrl
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:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
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:INDICATOR_SUSPICIOUS_EXE_SandboxComputerNames
Create hunting rule
Author:ditekSHen
Description:Detects executables containing possible sandbox analysis VM names
Rule name:INDICATOR_SUSPICIOUS_EXE_SandboxSystemUUIDs
Create hunting rule
Author:ditekSHen
Description:Detects executables containing possible sandbox system UUIDs
Rule name:INDICATOR_SUSPICIOUS_EXE_SandboxUserNames
Create hunting rule
Author:ditekSHen
Description:Detects executables containing possible sandbox analysis VM usernames
Rule name:INDICATOR_SUSPICIOUS_EXE_WMI_EnumerateVideoDevice
Create hunting rule
Author:ditekSHen
Description:Detects executables attemping to enumerate video devices using WMI
Rule name:MALWARE_Win_R77
Create hunting rule
Author:ditekSHen
Description:Detects r77 rootkit
Rule name:MALWARE_Win_UmbralStealer
Create hunting rule
Author:ditekShen
Description:Detects Umbral infostealer
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Runtime_Broker_Variant_1
Create hunting rule
Author:Sn0wFr0$t
Description:Detecting malicious Runtime Broker
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)
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:UmbrealStealerEXIFData
Create hunting rule
Author:adm1n_usa32
Description:Detects UmbralStealer by obvious comment in EXIF Data
Rule name:Windows_Rootkit_R77_be403e3c
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/elastic-security-labs-steps-through-the-r77-rootkit
Rule name:Windows_Rootkit_R77_d0367e28
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/elastic-security-labs-steps-through-the-r77-rootkit

File information

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

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/10535/

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