MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b3b766fc82f285fbdfdfd1246fa7a227e7e8d4228a0a13c6187c4aab2149d0be. 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


Stealc


Vendor detections: 16


Intelligence 16 IOCs 1 YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b3b766fc82f285fbdfdfd1246fa7a227e7e8d4228a0a13c6187c4aab2149d0be
SHA3-384 hash: 6629eb7a728f4b4b570a30f8cc053d62002c059a3b1b8bd58bda5238af5af3eb66c65df212644b7dcdce1f9ea6908c0e
SHA1 hash: 7c38e00060124176ae1b5ad7f17dd8a202445f26
MD5 hash: 61b72b2d4099b7ca2af5318b4ea6a668
humanhash: mockingbird-red-paris-march
File name:61b72b2d4099b7ca2af5318b4ea6a668.exe
Download: download sample
Signature Stealc
Create hunting rule
File size:721'408 bytes
First seen:2024-10-31 16:10:12 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash fe68515784559bdc15451f33c744290f (1 x Stealc)
ssdeep 12288:q3IbtEqk/k9aqG1G7uSuYC7QQhguHuM+hECDgLEoX5+rUKHRmc65L2Vl2:q3C+BMQqGESMAh/OMknD4jcrJHRmbOl
TLSH T11FE4F1232591FC71D51506B28D2FC6F8367EB8B16E5EEE6B32186F4F14711A29263313
TrID 38.6% (.EXE) Win32 EXE PECompact compressed (generic) (41569/9/9)
29.0% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
9.7% (.EXE) Win64 Executable (generic) (10522/11/4)
6.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika pebin
File icon (PE):PE icon
dhash icon 0c19121060a0c000 (1 x Stealc)
Reporter abuse_ch
Tags:exe Stealc


Avatar
abuse_ch
Stealc C2:
http://185.235.128.16/562c1eb14955c897.php

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
http://185.235.128.16/562c1eb14955c897.php https://threatfox.abuse.ch/ioc/1340337/

Intelligence

File Origin
# of uploads :
1
# of downloads :
428
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
61b72b2d4099b7ca2af5318b4ea6a668.exe
Verdict:
Malicious activity
Analysis date:
2024-10-31 17:01:16 UTC
Tags:
stealer stealc loader rust miner
Link:
https://app.any.run/tasks/db6eac7c-18dc-43e0-83bc-f65d73de22c5

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Packer.pkr_ce1a-9980177-0
Create hunting rule

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6723ac1c8d23d90491324c07
Tags:
exploit cobalt small hype
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Connection attempt
Sending an HTTP GET request
Creating a file
Running batch commands
Creating a process with a hidden window
Launching a process
Launching the default Windows debugger (dwwin.exe)
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
fingerprint microsoft_visual_cc packed packed packer_detected
Link:
https://www.filescan.io/uploads/6723ac1f1856d16cb60fdfa1/reports/85cb9bd0-ad88-4c5a-8c94-5ca994bb4185/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/b3b766fc82f285fbdfdfd1246fa7a227e7e8d4228a0a13c6187c4aab2149d0be
Result
Verdict:
SUSPICIOUS
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:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/9da79189-f84c-4738-b400-8245890198a7
Result
Threat name:
Stealc, Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1546262
Signature
Adds a directory exclusion to Windows Defender
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Attempt to bypass Chrome Application-Bound Encryption
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Found direct / indirect Syscall (likely to bypass EDR)
Found evasive API chain (may stop execution after checking locale)
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Hides threads from debuggers
Loading BitLocker PowerShell Module
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Modifies power options to not sleep / hibernate
Modifies the hosts file
Multi AV Scanner detection for submitted file
PE file contains section with special chars
Query firmware table information (likely to detect VMs)
Sample uses string decryption to hide its real strings
Searches for specific processes (likely to inject)
Sigma detected: Disable power options
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Stop EventLog
Suricata IDS alerts for network traffic
Tries to detect process monitoring tools (Task Manager, Process Explorer etc.)
Tries to detect sandboxes / dynamic malware analysis system (registry check)
Tries to detect sandboxes and other dynamic analysis tools (window names)
Tries to harvest and steal Bitcoin Wallet information
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to steal Crypto Currency Wallets
Tries to steal Mail credentials (via file / registry access)
Uses powercfg.exe to modify the power settings
Yara detected Powershell download and execute
Yara detected Stealc
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1546262 Sample: WGo3ga1AL9.exe Startdate: 31/10/2024 Architecture: WINDOWS Score: 100 81 osteo9.esalnuvol.com 2->81 107 Suricata IDS alerts for network traffic 2->107 109 Found malware configuration 2->109 111 Malicious sample detected (through community Yara rule) 2->111 113 13 other signatures 2->113 10 WGo3ga1AL9.exe 37 2->10         started        15 updater.exe 2->15         started        17 svchost.exe 1 1 2->17         started        19 svchost.exe 3 8 2->19         started        signatures3 process4 dnsIp5 93 185.235.128.16, 49730, 49754, 49762 ON-LINE-DATAServerlocation-NetherlandsDrontenNL Ukraine 10->93 95 osteo9.esalnuvol.com 87.106.236.48, 443, 49761 ONEANDONE-ASBrauerstrasse48DE Germany 10->95 69 C:\ProgramData\nss3.dll, PE32 10->69 dropped 71 C:\ProgramDatabehaviorgraphDBFCGIIIJ.exe, PE32+ 10->71 dropped 73 C:\Users\user\AppData\...\vcruntime140[1].dll, PE32 10->73 dropped 75 12 other files (none is malicious) 10->75 dropped 117 Detected unpacking (changes PE section rights) 10->117 119 Detected unpacking (overwrites its own PE header) 10->119 121 Attempt to bypass Chrome Application-Bound Encryption 10->121 129 8 other signatures 10->129 21 cmd.exe 1 10->21         started        23 chrome.exe 10->23         started        26 WerFault.exe 21 16 10->26         started        123 Query firmware table information (likely to detect VMs) 15->123 125 Tries to detect sandboxes and other dynamic analysis tools (window names) 15->125 127 Hides threads from debuggers 15->127 131 3 other signatures 15->131 97 127.0.0.1 unknown unknown 17->97 29 WerFault.exe 2 19->29         started        file6 signatures7 process8 dnsIp9 31 GDBFCGIIIJ.exe 1 3 21->31         started        35 conhost.exe 21->35         started        89 192.168.2.4, 443, 49730, 49736 unknown unknown 23->89 91 239.255.255.250 unknown Reserved 23->91 37 chrome.exe 23->37         started        67 C:\ProgramData\Microsoft\...\Report.wer, Unicode 26->67 dropped file10 process11 dnsIp12 77 C:\ProgramDatabehaviorgraphoogle\Chrome\updater.exe, PE32+ 31->77 dropped 79 C:\Windows\System32\drivers\etc\hosts, ASCII 31->79 dropped 99 Query firmware table information (likely to detect VMs) 31->99 101 Uses powercfg.exe to modify the power settings 31->101 103 Modifies the hosts file 31->103 105 6 other signatures 31->105 40 powershell.exe 23 31->40         started        43 cmd.exe 31->43         started        45 sc.exe 31->45         started        47 12 other processes 31->47 83 apis.google.com 37->83 85 plus.l.google.com 142.250.184.206, 443, 49746 GOOGLEUS United States 37->85 87 2 other IPs or domains 37->87 file13 signatures14 process15 signatures16 115 Loading BitLocker PowerShell Module 40->115 49 conhost.exe 40->49         started        51 WmiPrvSE.exe 40->51         started        53 conhost.exe 43->53         started        55 wusa.exe 43->55         started        57 conhost.exe 45->57         started        59 conhost.exe 47->59         started        61 conhost.exe 47->61         started        63 conhost.exe 47->63         started        65 9 other processes 47->65 process17
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b3b766fc82f285fbdfdfd1246fa7a227e7e8d4228a0a13c6187c4aab2149d0be
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b3b766fc82f285fbdfdfd1246fa7a227e7e8d4228a0a13c6187c4aab2149d0be/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wo3wn7ec6kc7xx672esg7j5ce7t6rvbcrifbhrqyprfkwikj2c7a._file
Verdict:
malicious
Label(s):
stealc
Create hunting rule
Similar samples:
error
Stealc
Result
Malware family:
xmrig
Create hunting rule
Score:
  10/10
Tags:
family:stealc family:xmrig botnet:logsdiller credential_access discovery evasion execution miner persistence spyware stealer themida trojan
Link:
https://tria.ge/reports/241031-tmx2na1gkm/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies data under HKEY_USERS
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Browser Information Discovery
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Launches sc.exe
Drops file in System32 directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Checks whether UAC is enabled
Power Settings
Checks BIOS information in registry
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Reads data files stored by FTP clients
Reads user/profile data of web browsers
Themida packer
Unsecured Credentials: Credentials In Files
Command and Scripting Interpreter: PowerShell
Creates new service(s)
Downloads MZ/PE file
Drops file in Drivers directory
Stops running service(s)
Uses browser remote debugging
Identifies VirtualBox via ACPI registry values (likely anti-VM)
XMRig Miner payload
Stealc
Stealc family
Xmrig family
xmrig
Malware Config
C2 Extraction:
http://185.235.128.16
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/c2224961-c982-4a19-a88c-64076eb5d8f8
Unpacked files
SH256 hash:
81a4f37c5495800b7cc46aea6535d9180dadb5c151db6f1fd1968d1cd8c1eeb4
MD5 hash:
eda18948a989176f4eebb175ce806255
SHA1 hash:
ff22a3d5f5fb705137f233c36622c79eab995897
Link:
https://www.unpac.me/results/9f98ccdb-dc52-4a3e-9203-986872e0fdd9/
SH256 hash:
a668f46361d0e6161ca44bcf94f682fe84d86fa86589335ed28df575ce4e6848
MD5 hash:
852cbaf3e08986f91df2ea5f31c9088d
SHA1 hash:
fba923d03f7b3b36b8e99124c8be97f1b7270a56
Detections:
stealc
Create hunting rule
detect_Mars_Stealer
Create hunting rule
Link:
https://www.unpac.me/results/9f98ccdb-dc52-4a3e-9203-986872e0fdd9/
Parent samples :
b3b766fc82f285fbdfdfd1246fa7a227e7e8d4228a0a13c6187c4aab2149d0be
78f70275d462340e3f57293641aedd5de6112df4b51c1d9d11d35676260c147c
SH256 hash:
b3b766fc82f285fbdfdfd1246fa7a227e7e8d4228a0a13c6187c4aab2149d0be
MD5 hash:
61b72b2d4099b7ca2af5318b4ea6a668
SHA1 hash:
7c38e00060124176ae1b5ad7f17dd8a202445f26
Link:
https://www.unpac.me/results/9f98ccdb-dc52-4a3e-9203-986872e0fdd9/
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/b3b766fc82f285fbdfdfd1246fa7a227e7e8d4228a0a13c6187c4aab2149d0be

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

File information

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

Web download

Stealc

Executable exe b3b766fc82f285fbdfdfd1246fa7a227e7e8d4228a0a13c6187c4aab2149d0be

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3243375/
  
Delivery method
Distributed via web download

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
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
KERNEL32.dll::CloseHandle
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::LoadLibraryA
KERNEL32.dll::GetStartupInfoW
KERNEL32.dll::GetStartupInfoA
KERNEL32.dll::GetCommandLineW
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleInputW
KERNEL32.dll::WriteConsoleA
KERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleInputW
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleAliasExesA
KERNEL32.dll::GetConsoleCP
KERNEL32.dll::GetConsoleMode
KERNEL32.dll::GetConsoleOutputCP
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CreateFileA
KERNEL32.dll::GetFileAttributesW
KERNEL32.dll::GetTempFileNameW
WIN_BASE_USER_APIRetrieves Account InformationKERNEL32.dll::GetComputerNameW

Comments