MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a91b0a8db700951e27f541810e599f3b46eebc2ba1d5da6633a149bbcf4ff171. 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: 15


Intelligence 15 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a91b0a8db700951e27f541810e599f3b46eebc2ba1d5da6633a149bbcf4ff171
SHA3-384 hash: bdb3ab1339f6004f402772488783ad0ce56a35f9d4060ab70423dd52d4ff7e46df850355978a050d7b9337270cbd4bae
SHA1 hash: b39fd4f91643c66ce575344ed232831a50d0b350
MD5 hash: 2aa3f11505d5184722916a74ba5e301b
humanhash: arkansas-triple-winter-hydrogen
File name:2aa3f11505d5184722916a74ba5e301b.exe
Download: download sample
Signature Stealc
Create hunting rule
File size:462'337 bytes
First seen:2024-04-29 02:40:30 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f8d3d580c89ab890cee57ed29743eeb7 (13 x Stealc, 1 x Rhadamanthys)
ssdeep 12288:Dt++0WACRaBnCQ08O0y+li0pUIZ53+gXWN1RUr:ihC1gp+Qk1RUr
TLSH T1E1A4BF0362E07E54E562C7728E3EB6F8361DF9204E997B272218762F14B93F1E263751
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 0009144440202000 (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 :
357
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a91b0a8db700951e27f541810e599f3b46eebc2ba1d5da6633a149bbcf4ff171.exe
Verdict:
Malicious activity
Analysis date:
2024-04-29 02:40:53 UTC
Tags:
gcleaner loader stealer stealc arechclient2 backdoor
Link:
https://app.any.run/tasks/784d8d14-b46c-499d-a30b-5c691373c55d

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
Creating a window
Searching for synchronization primitives
Creating a file
Launching the default Windows debugger (dwwin.exe)
Sending an HTTP POST request
Transferring files using the Background Intelligent Transfer Service (BITS)
Sending a custom TCP 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/662f08c054bafb7d21e50635/reports/a8fc0f10-b343-456f-82c4-c8aceafba691/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/a91b0a8db700951e27f541810e599f3b46eebc2ba1d5da6633a149bbcf4ff171
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/97441633-1e39-431f-a887-7e563e792b71
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/1433071
Signature
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)
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 SectopRAT
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: 1433071 Sample: 4HLkauoeb1.exe Startdate: 29/04/2024 Architecture: WINDOWS Score: 100 81 download.iolo.net 2->81 83 westus2-2.in.applicationinsights.azure.com 2->83 85 7 other IPs or domains 2->85 111 Multi AV Scanner detection for domain / URL 2->111 113 Found malware configuration 2->113 115 Malicious sample detected (through community Yara rule) 2->115 117 19 other signatures 2->117 9 4HLkauoeb1.exe 3 11 2->9         started        14 run.exe 2->14         started        16 chrome.exe 1 2->16         started        18 chrome.exe 2->18         started        signatures3 process4 dnsIp5 101 185.172.128.228, 49731, 80 NADYMSS-ASRU Russian Federation 9->101 103 185.172.128.59, 49732, 80 NADYMSS-ASRU Russian Federation 9->103 109 2 other IPs or domains 9->109 73 C:\Users\user\AppData\Local\Temp\u5i8.3.exe, PE32 9->73 dropped 75 C:\Users\user\AppData\Local\Temp\...\run.exe, PE32 9->75 dropped 77 C:\Users\user\AppData\Local\...\relay.dll, PE32 9->77 dropped 79 2 other malicious files 9->79 dropped 153 Detected unpacking (overwrites its own PE header) 9->153 20 u5i8.0.exe 5 76 9->20         started        25 run.exe 6 9->25         started        27 u5i8.3.exe 18 8 9->27         started        29 WerFault.exe 16 9->29         started        155 Maps a DLL or memory area into another process 14->155 157 Found direct / indirect Syscall (likely to bypass EDR) 14->157 31 cmd.exe 14->31         started        105 192.168.2.4, 443, 49730, 49731 unknown unknown 16->105 107 239.255.255.250 unknown Reserved 16->107 33 chrome.exe 16->33         started        35 chrome.exe 16->35         started        37 chrome.exe 18->37         started        file6 signatures7 process8 dnsIp9 89 185.172.128.150, 49733, 80 NADYMSS-ASRU Russian Federation 20->89 57 C:\Users\user\AppData\...\softokn3[1].dll, PE32 20->57 dropped 59 C:\Users\user\AppData\Local\...\nss3[1].dll, PE32 20->59 dropped 61 C:\Users\user\AppData\...\mozglue[1].dll, PE32 20->61 dropped 69 9 other files (5 malicious) 20->69 dropped 125 Multi AV Scanner detection for dropped file 20->125 127 Detected unpacking (changes PE section rights) 20->127 129 Detected unpacking (overwrites its own PE header) 20->129 139 9 other signatures 20->139 39 WerFault.exe 20->39         started        63 C:\Users\user\AppData\Roaming\...\relay.dll, PE32 25->63 dropped 65 C:\Users\user\AppData\...\UIxMarketPlugin.dll, PE32 25->65 dropped 131 Maps a DLL or memory area into another process 25->131 133 Found direct / indirect Syscall (likely to bypass EDR) 25->133 41 cmd.exe 4 25->41         started        91 svc.iolo.com 20.157.87.45 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 27->91 135 Checks if the current machine is a virtual machine (disk enumeration) 27->135 45 SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe 27->45         started        67 C:\Users\user\AppData\...\xdluuvxdsbmrcl, PE32 31->67 dropped 137 Writes to foreign memory regions 31->137 47 conhost.exe 31->47         started        49 MSBuild.exe 31->49         started        93 142.250.190.100, 443, 49738, 49739 GOOGLEUS United States 33->93 95 www.google.com 33->95 97 142.250.191.164 GOOGLEUS United States 35->97 99 www.google.com 35->99 file10 signatures11 process12 file13 71 C:\Users\user\AppData\Local\Temp\hix, PE32 41->71 dropped 141 Writes to foreign memory regions 41->141 143 Found hidden mapped module (file has been removed from disk) 41->143 145 Maps a DLL or memory area into another process 41->145 51 MSBuild.exe 41->51         started        55 conhost.exe 41->55         started        147 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 45->147 149 Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines) 45->149 151 Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes) 45->151 signatures14 process15 dnsIp16 87 91.215.85.66 PINDC-ASRU Russian Federation 51->87 119 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 51->119 121 Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines) 51->121 123 Tries to harvest and steal browser information (history, passwords, etc) 51->123 signatures17
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a91b0a8db700951e27f541810e599f3b46eebc2ba1d5da6633a149bbcf4ff171
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a91b0a8db700951e27f541810e599f3b46eebc2ba1d5da6633a149bbcf4ff171/
Threat name:
Win32.Trojan.Operaloader
Create hunting rule
Status:
Malicious
First seen:
2024-04-28 22:40:37 UTC
File Type:
PE (Exe)
Extracted files:
62
AV detection:
23 of 24 (95.83%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=venqvdnxackr4j7vigaq4wm7hndo5pbluhk5uzrtufe3xt2p6fyq._file
Verdict:
malicious
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-c6fhaagb6w/
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/5b1c4547-3443-4087-9df3-a9acd92de4e5/
SH256 hash:
a91b0a8db700951e27f541810e599f3b46eebc2ba1d5da6633a149bbcf4ff171
MD5 hash:
2aa3f11505d5184722916a74ba5e301b
SHA1 hash:
b39fd4f91643c66ce575344ed232831a50d0b350
Link:
https://www.unpac.me/results/5b1c4547-3443-4087-9df3-a9acd92de4e5/
Malware family:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a91b0a8db700/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/a91b0a8db700951e27f541810e599f3b46eebc2ba1d5da6633a149bbcf4ff171

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 a91b0a8db700951e27f541810e599f3b46eebc2ba1d5da6633a149bbcf4ff171

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2804603/
  
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::CloseHandle
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::GetVolumeInformationA
KERNEL32.dll::GetStartupInfoW
KERNEL32.dll::GetCommandLineW
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleInputA
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleAliasesA
KERNEL32.dll::GetConsoleCP
KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CreateHardLinkA
KERNEL32.dll::CreateFileW
KERNEL32.dll::GetWindowsDirectoryA
KERNEL32.dll::GetSystemDirectoryA
KERNEL32.dll::RemoveDirectoryA
KERNEL32.dll::GetTempPathA
WIN_BASE_USER_APIRetrieves Account InformationKERNEL32.dll::GetComputerNameA
KERNEL32.dll::QueryDosDeviceW

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