MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 91a3e859de8695493d8de901d2bf20921bf9ee201044d110b79527fe3ea14e83. 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: 91a3e859de8695493d8de901d2bf20921bf9ee201044d110b79527fe3ea14e83
SHA3-384 hash: f0249f5b130074074c2f3b3846081267e928c057eb399bff3eef0f15ad530a55e392faf3ffd3e1976268aa96665f6422
SHA1 hash: f41a143c61f0050719e0826c4505e0a8ab823f23
MD5 hash: 51f7524bd99ea47bdf5f5b20f6768958
humanhash: april-may-river-oven
File name:51f7524bd99ea47bdf5f5b20f6768958.exe
Download: download sample
Signature Stealc
Create hunting rule
File size:406'529 bytes
First seen:2024-03-28 19:01:39 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 0ab7184e188103f81bd780558b811c5b (2 x Stealc)
ssdeep 12288:Ir2ggucLBVvM/DSbDRdAKc5bXD5MoD/5QY:InQV0/ORY5/5QY
TLSH T13984BE21F7F5803EF3F35E3459B496D00A7BB9736970818F26A0262E6E716C18E69713
TrID 46.6% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
25.2% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
8.5% (.EXE) Win64 Executable (generic) (10523/12/4)
5.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.0% (.EXE) Win16 NE executable (generic) (5038/12/1)
File icon (PE):PE icon
dhash icon 3370ecdaccf0335a (3 x Stealc, 2 x GCleaner, 1 x LummaStealer)
Reporter abuse_ch
Tags:exe Stealc

Intelligence

File Origin
# of uploads :
1
# of downloads :
331
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
91a3e859de8695493d8de901d2bf20921bf9ee201044d110b79527fe3ea14e83.exe
Verdict:
Malicious activity
Analysis date:
2024-03-28 19:14:24 UTC
Tags:
loader stealer stealc
Link:
https://app.any.run/tasks/e5fdbdf2-b9a7-47b8-a254-f81aa1ec1c1f

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
Searching for synchronization primitives
Creating a window
Launching the default Windows debugger (dwwin.exe)
Creating a file
Connection attempt to an infection source
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
fingerprint overlay packed
Link:
https://www.filescan.io/uploads/6605bebed463a7b04771420e/reports/595ff5d9-f1a8-4226-9ed1-78896eff35f0/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/91a3e859de8695493d8de901d2bf20921bf9ee201044d110b79527fe3ea14e83
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/9a819791-63f2-49ae-aa6a-1f52bee6ec61
Result
Threat name:
Mars Stealer, PureLog Stealer, Stealc, V
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1417247
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
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)
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Found evasive API chain (may stop execution after checking locale)
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)
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 ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Yara detected Generic Downloader
Yara detected Mars stealer
Yara detected PureLog Stealer
Yara detected Stealc
Yara detected Vidar stealer
Yara detected zgRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1417247 Sample: z5uPcOrP22.exe Startdate: 28/03/2024 Architecture: WINDOWS Score: 100 63 westus2-2.in.applicationinsights.azure.com 2->63 65 westus2-2.in.ai.privatelink.monitor.azure.com 2->65 67 2 other IPs or domains 2->67 91 Snort IDS alert for network traffic 2->91 93 Found malware configuration 2->93 95 Malicious sample detected (through community Yara rule) 2->95 97 15 other signatures 2->97 11 z5uPcOrP22.exe 1 3 2->11         started        signatures3 process4 dnsIp5 71 185.172.128.90, 49705, 80 NADYMSS-ASRU Russian Federation 11->71 73 185.172.128.144, 49708, 80 NADYMSS-ASRU Russian Federation 11->73 75 185.172.128.65, 49706, 49707, 49736 NADYMSS-ASRU Russian Federation 11->75 55 C:\Users\user\AppData\Local\Temp\u2vo.1.exe, PE32 11->55 dropped 57 C:\Users\user\AppData\Local\Temp\u2vo.0.exe, PE32 11->57 dropped 111 Detected unpacking (changes PE section rights) 11->111 113 Detected unpacking (overwrites its own PE header) 11->113 16 u2vo.0.exe 70 11->16         started        21 u2vo.1.exe 6 8 11->21         started        23 WerFault.exe 19 18 11->23         started        file6 signatures7 process8 dnsIp9 59 185.172.128.209, 49709, 80 NADYMSS-ASRU Russian Federation 16->59 47 C:\Users\user\AppData\...\AKKEHIECFC.exe, PE32 16->47 dropped 49 C:\Users\user\AppData\...\softokn3[1].dll, PE32 16->49 dropped 51 C:\Users\user\AppData\Local\...\nss3[1].dll, PE32 16->51 dropped 53 11 other files (7 malicious) 16->53 dropped 77 Antivirus detection for dropped file 16->77 79 Detected unpacking (changes PE section rights) 16->79 81 Detected unpacking (overwrites its own PE header) 16->81 85 9 other signatures 16->85 25 cmd.exe 16->25         started        28 WerFault.exe 16->28         started        30 WerFault.exe 16->30         started        61 svc.iolo.com 20.157.87.45, 49710, 49729, 80 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 21->61 83 Checks if the current machine is a virtual machine (disk enumeration) 21->83 32 SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe 14 9 21->32         started        file10 signatures11 process12 signatures13 101 Uses ping.exe to sleep 25->101 103 Uses ping.exe to check the status of other devices and networks 25->103 34 AKKEHIECFC.exe 25->34         started        37 conhost.exe 25->37         started        105 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 32->105 107 Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines) 32->107 109 Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes) 32->109 process14 signatures15 87 Antivirus detection for dropped file 34->87 89 Multi AV Scanner detection for dropped file 34->89 39 cmd.exe 34->39         started        process16 signatures17 99 Uses ping.exe to sleep 39->99 42 PING.EXE 39->42         started        45 conhost.exe 39->45         started        process18 dnsIp19 69 2.2.2.2 FranceTelecom-OrangeFR France 42->69
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/91a3e859de8695493d8de901d2bf20921bf9ee201044d110b79527fe3ea14e83
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/91a3e859de8695493d8de901d2bf20921bf9ee201044d110b79527fe3ea14e83/
Threat name:
Win32.Trojan.Operaloader
Create hunting rule
Status:
Malicious
First seen:
2024-03-27 12:39:54 UTC
File Type:
PE (Exe)
Extracted files:
22
AV detection:
19 of 23 (82.61%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=sgr6qwo6q2kuspmn5ea5fpzasin7t3racbcncefxsut74pvbj2bq._file
Verdict:
malicious
Result
Malware family:
zgrat
Create hunting rule
Score:
  10/10
Tags:
family:stealc family:zgrat discovery rat spyware stealer
Link:
https://tria.ge/reports/240328-xpr5zaef75/
Behaviour
Checks SCSI registry key(s)
Checks processor information in registry
Runs ping.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Checks computer location settings
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
Stealc
ZGRat
Malware Config
C2 Extraction:
http://185.172.128.209
Unpacked files
SH256 hash:
d232c7d6f18781948271a3f610bf4260be83cf8fbcf3b67a938c97690ae239fb
MD5 hash:
67dc206063d9cc786ae95df7f54337bc
SHA1 hash:
f0e68f4fa0aa40243b187df91c98376dc2c32d0c
Link:
https://www.unpac.me/results/6cae2bf6-fb64-4853-bf4f-fbe9927be39c/
SH256 hash:
91a3e859de8695493d8de901d2bf20921bf9ee201044d110b79527fe3ea14e83
MD5 hash:
51f7524bd99ea47bdf5f5b20f6768958
SHA1 hash:
f41a143c61f0050719e0826c4505e0a8ab823f23
Link:
https://www.unpac.me/results/6cae2bf6-fb64-4853-bf4f-fbe9927be39c/
Malware family:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/91a3e859de86/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/91a3e859de8695493d8de901d2bf20921bf9ee201044d110b79527fe3ea14e83

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 91a3e859de8695493d8de901d2bf20921bf9ee201044d110b79527fe3ea14e83

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2789612/
  
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::FindNextVolumeMountPointW
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::GetStartupInfoW
KERNEL32.dll::GetCommandLineA
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleW
KERNEL32.dll::SetConsoleTitleA
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleAliasExesLengthA
KERNEL32.dll::GetConsoleOutputCP
KERNEL32.dll::GetConsoleCP
KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CreateHardLinkW
KERNEL32.dll::CreateFileA
KERNEL32.dll::CreateFileW
KERNEL32.dll::GetFileAttributesA
WIN_HTTP_APIUses HTTP servicesWINHTTP.dll::WinHttpOpen
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyW

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