MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b6b7cff03c27eb56d701cd474bc5c12807dbeb58fca0941bcf9ec2c269a07cf7. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b6b7cff03c27eb56d701cd474bc5c12807dbeb58fca0941bcf9ec2c269a07cf7
SHA3-384 hash: 5ccc30866ee30242c7538aaf5de1c89d7a3b2bca3de69660e19fb629dbeaddda774fe528c7b60604e3f1cc146eccfa59
SHA1 hash: c628156dfc41fdde30f692bbcc6f7e4fdf0dd2ea
MD5 hash: 6b19cf5e2ad1c589a9591ef99c071c1d
humanhash: neptune-eight-romeo-beer
File name:6b19cf5e2ad1c589a9591ef99c071c1d.exe
Download: download sample
Signature Stealc
Create hunting rule
File size:355'329 bytes
First seen:2024-04-29 05:25:42 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash bf1070ba79872e55c98c6b1c44ebbf3c (16 x Stealc, 1 x Arechclient2, 1 x Rhadamanthys)
ssdeep 6144:Iow3n4zYeN4lwlXFWI46PcJ+bbdtuBx4rEZGl0HIsitMuF:1eeyOl1WI46PcJYSBxSMGl0I9F
Threatray 319 similar samples on MalwareBazaar
TLSH T1E2740202BBA1D832D26A58704D3CC6A25B3F78729AB881CB37941FDE7F302D0593575A
TrID 67.1% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
12.2% (.EXE) Win64 Executable (generic) (10523/12/4)
5.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
5.2% (.EXE) Win32 Executable (generic) (4504/4/1)
2.4% (.ICL) Windows Icons Library (generic) (2059/9)
File icon (PE):PE icon
dhash icon 64f29a989999a981 (5 x Stealc)
Reporter abuse_ch
Tags:exe Stealc


Avatar
abuse_ch
Stealc C2:
http://185.172.128.150/c698e1bc8a2f5e6d.php

Intelligence

File Origin
# of uploads :
1
# of downloads :
321
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
b6b7cff03c27eb56d701cd474bc5c12807dbeb58fca0941bcf9ec2c269a07cf7.exe
Verdict:
Malicious activity
Analysis date:
2024-04-29 05:30:55 UTC
Tags:
gcleaner loader stealer stealc arechclient2 backdoor
Link:
https://app.any.run/tasks/ec0bb972-93c3-4027-93a1-7710a49df634

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending an HTTP GET request to an infection source
Creating a file in the %temp% directory
Сreating synchronization primitives
Creating a process from a recently created file
DNS request
Connection attempt
Sending an HTTP GET request
Connecting to a non-recommended domain
Running batch commands
Creating a process with a hidden window
Launching a process
Launching the default Windows debugger (dwwin.exe)
Searching for the window
Creating a window
Searching for synchronization primitives
Creating a file
Sending an HTTP POST request
Connection attempt to an infection source
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
fingerprint overlay packed
Link:
https://www.filescan.io/uploads/662f2f6dd2fc149e4126cefe/reports/2acd17f2-5b24-4c47-ab14-027eed35ebcb/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/b6b7cff03c27eb56d701cd474bc5c12807dbeb58fca0941bcf9ec2c269a07cf7
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:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/aa3a0afa-7c39-4aee-a993-be96f915a5f3
Result
Threat name:
Mars Stealer, PureLog Stealer, RedLine,
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1433092
Signature
.NET source code contains method to dynamically call methods (often used by packers)
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Checks if the current machine is a virtual machine (disk enumeration)
Connects to many ports of the same IP (likely port scanning)
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 hidden mapped module (file has been removed from disk)
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines)
Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Searches for specific processes (likely to inject)
Snort IDS alert for network traffic
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 known network protocols on non-standard ports
Writes to foreign memory regions
Yara detected Generic Downloader
Yara detected Mars stealer
Yara detected PureLog Stealer
Yara detected RedLine Stealer
Yara detected Stealc
Yara detected UAC Bypass using CMSTP
Yara detected Vidar stealer
Yara detected zgRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1433092 Sample: 5TarW0A1Vw.exe Startdate: 29/04/2024 Architecture: WINDOWS Score: 100 75 download.iolo.net 2->75 77 westus2-2.in.applicationinsights.azure.com 2->77 79 8 other IPs or domains 2->79 115 Snort IDS alert for network traffic 2->115 117 Multi AV Scanner detection for domain / URL 2->117 119 Found malware configuration 2->119 121 20 other signatures 2->121 9 5TarW0A1Vw.exe 4 11 2->9         started        14 run.exe 2->14         started        signatures3 process4 dnsIp5 81 185.172.128.90, 49716, 80 NADYMSS-ASRU Russian Federation 9->81 83 185.172.128.228, 49717, 80 NADYMSS-ASRU Russian Federation 9->83 85 2 other IPs or domains 9->85 61 C:\Users\user\AppData\Local\Temp\u46k.3.exe, PE32 9->61 dropped 63 C:\Users\user\AppData\Local\Temp\...\run.exe, PE32 9->63 dropped 65 C:\Users\user\AppData\Local\...\relay.dll, PE32 9->65 dropped 67 2 other malicious files 9->67 dropped 129 Detected unpacking (changes PE section rights) 9->129 131 Detected unpacking (overwrites its own PE header) 9->131 16 u46k.0.exe 57 9->16         started        21 run.exe 6 9->21         started        23 u46k.3.exe 22 8 9->23         started        25 WerFault.exe 21 16 9->25         started        133 Maps a DLL or memory area into another process 14->133 135 Found direct / indirect Syscall (likely to bypass EDR) 14->135 27 cmd.exe 14->27         started        file6 signatures7 process8 dnsIp9 71 185.172.128.150 NADYMSS-ASRU Russian Federation 16->71 47 C:\Users\user\AppData\...\softokn3[1].dll, PE32 16->47 dropped 49 C:\Users\user\AppData\Local\...\nss3[1].dll, PE32 16->49 dropped 51 C:\Users\user\AppData\...\mozglue[1].dll, PE32 16->51 dropped 59 9 other files (5 malicious) 16->59 dropped 99 Multi AV Scanner detection for dropped file 16->99 101 Detected unpacking (changes PE section rights) 16->101 103 Detected unpacking (overwrites its own PE header) 16->103 113 8 other signatures 16->113 29 WerFault.exe 16->29         started        53 C:\Users\user\AppData\Roaming\...\relay.dll, PE32 21->53 dropped 55 C:\Users\user\AppData\...\UIxMarketPlugin.dll, PE32 21->55 dropped 105 Maps a DLL or memory area into another process 21->105 107 Found direct / indirect Syscall (likely to bypass EDR) 21->107 31 cmd.exe 4 21->31         started        73 svc.iolo.com 20.157.87.45 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 23->73 109 Checks if the current machine is a virtual machine (disk enumeration) 23->109 35 SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe 23->35         started        57 C:\Users\user\AppData\Local\Temp\reph, PE32 27->57 dropped 111 Writes to foreign memory regions 27->111 37 conhost.exe 27->37         started        39 MSBuild.exe 27->39         started        file10 signatures11 process12 file13 69 C:\Users\user\AppData\Local\...\rgybhovljsyck, PE32 31->69 dropped 89 Writes to foreign memory regions 31->89 91 Found hidden mapped module (file has been removed from disk) 31->91 93 Maps a DLL or memory area into another process 31->93 41 MSBuild.exe 31->41         started        45 conhost.exe 31->45         started        95 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 35->95 97 Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes) 35->97 signatures14 process15 dnsIp16 87 91.215.85.66 PINDC-ASRU Russian Federation 41->87 123 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 41->123 125 Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines) 41->125 127 Tries to harvest and steal browser information (history, passwords, etc) 41->127 signatures17
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b6b7cff03c27eb56d701cd474bc5c12807dbeb58fca0941bcf9ec2c269a07cf7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b6b7cff03c27eb56d701cd474bc5c12807dbeb58fca0941bcf9ec2c269a07cf7/
Threat name:
Win32.Spyware.Stealc
Create hunting rule
Status:
Malicious
First seen:
2024-04-29 05:26:08 UTC
File Type:
PE (Exe)
Extracted files:
16
AV detection:
20 of 23 (86.96%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w23474b4e7vvnvybzvduxrobfad5x22y7sqjig6pt3bme2napt3q._file
Verdict:
malicious
Similar samples:
142256ba0997278633a73e059d4d48e0dbb9ce9af82d2ccf8b23973530ca4400
Stealc
480b540cb344d74306d03347658b2018a4b8504f4055ad15ba43456953d7b33c
Stealc
508baf86ec9cd4c0ed812dfa9cbdd444a14a54de40f50543d71b21b052da72d2
Stealc
ebd2762a31add17ea93d027db70242ed934bf2e7451b3a6bbe472a69d789197d
Stealc
f1ecf2469a831081ce9d895a7f1fde88e882e2c96b4c96bbea2f3c622786ffdc
Stealc
+ 309 additional samples on MalwareBazaar
Result
Malware family:
zgrat
Create hunting rule
Score:
  10/10
Tags:
family:sectoprat family:stealc family:zgrat discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/240429-f4ve7sca5t/
Behaviour
Checks SCSI registry key(s)
Checks processor information in registry
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Executes dropped EXE
Loads dropped DLL
Reads data files stored by FTP clients
Reads user/profile data of web browsers
Downloads MZ/PE file
Detect ZGRat V1
SectopRAT
SectopRAT payload
Stealc
ZGRat
Malware Config
C2 Extraction:
http://185.172.128.150
Unpacked files
SH256 hash:
cfc2458a54578854cae748277b7527e4a2ff4a49aa4a55b885109fc334f73865
MD5 hash:
f24e8a42d193b41ec73c76a36c30ee0d
SHA1 hash:
4ceab3b79d49350c6d9575470cd273ec1d8b26cd
Link:
https://www.unpac.me/results/c5d68ef0-81a8-41b2-bd34-f0c85ddf577e/
SH256 hash:
b6b7cff03c27eb56d701cd474bc5c12807dbeb58fca0941bcf9ec2c269a07cf7
MD5 hash:
6b19cf5e2ad1c589a9591ef99c071c1d
SHA1 hash:
c628156dfc41fdde30f692bbcc6f7e4fdf0dd2ea
Link:
https://www.unpac.me/results/c5d68ef0-81a8-41b2-bd34-f0c85ddf577e/
Malware family:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b6b7cff03c27/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:DebuggerCheck__API
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

File information

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

Web download

Stealc

Executable exe b6b7cff03c27eb56d701cd474bc5c12807dbeb58fca0941bcf9ec2c269a07cf7

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2804701/
  
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_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CloseHandle
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::SetFirmwareEnvironmentVariableA
KERNEL32.dll::LoadLibraryA
KERNEL32.dll::GetVolumeInformationA
KERNEL32.dll::GetStartupInfoA
KERNEL32.dll::GetCommandLineA
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleA
KERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::ScrollConsoleScreenBufferA
KERNEL32.dll::SetConsoleCtrlHandler
KERNEL32.dll::SetConsoleTitleW
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CreateFileA

Comments