MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4243b753fe99d9c39f63de939a9ecfa2aba49e92621b8f60e77311686d8b8551. 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


Stealerium


Vendor detections: 12


Intelligence 12 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4243b753fe99d9c39f63de939a9ecfa2aba49e92621b8f60e77311686d8b8551
SHA3-384 hash: 3b563672e4fd842a9ef2dc1fb7552c6a06785da3c143e14bdda84bd6125389d96491ae00c5608ad801d01ecc8e3f2c4e
SHA1 hash: 7d4a540794f11438a25992de479a069340480ec7
MD5 hash: 91269ab921cf5d89d7e7abcbf5488f42
humanhash: neptune-table-muppet-three
File name:AccountActivity_Apr15_2025.PDF.exe
Download: download sample
Signature Stealerium
Create hunting rule
File size:8'192 bytes
First seen:2025-04-16 07:42:40 UTC
Last seen:2025-05-09 12:39:09 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 96:cPHfeKfraKjBZcbv+8DvFOe8+O9stzT3t/XEl4YJaZg0+8f8d7mO+zNt:yfHBWv+8DYMOUzFXEl46Sj8d7mz
TLSH T106F1F71CE3CD4337DDA30A3EACB762015774F311EA17CF5E3C88621BAA12B914A52B61
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter threatcat_ch
Tags:exe Stealerium

Intelligence

File Origin
# of uploads :
2
# of downloads :
454
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
AccountActivity_Apr15_2025.PDF.exe
Verdict:
Malicious activity
Analysis date:
2025-04-16 07:43:41 UTC
Tags:
purecrypter netreactor stealer evasion crypto-regex stealerium
Link:
https://app.any.run/tasks/0e950caf-a584-41e2-a60d-6fb2fcbf4068

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/2417/
Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67ff6098f3fd91e7d60b8244
Tags:
smartassembly packed
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
DNS request
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Unauthorized injection to a recently created process
Restart of the analyzed sample
Using the Windows Management Instrumentation requests
Enabling the 'hidden' option for analyzed file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
masquerade obfuscated obfuscated packed packed smartassembly smart_assembly
Link:
https://www.filescan.io/uploads/67ff5f89e9c1e257979aa14f/reports/9f9e1696-2233-42e3-8bd5-0dd7585e257c/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/4243b753fe99d9c39f63de939a9ecfa2aba49e92621b8f60e77311686d8b8551
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/3bb89931-5553-4666-8aa0-b321360167e6
Result
Threat name:
Phantom stealer, Stealerium
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1666134
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Attempt to bypass Chrome Application-Bound Encryption
Drops password protected ZIP file
Found many strings related to Crypto-Wallets (likely being stolen)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Modifies existing user documents (likely ransomware behavior)
Multi AV Scanner detection for submitted file
Queries sensitive Plug and Play Device Information (via WMI, Win32_PnPEntity, often done to detect virtual machines)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Sigma detected: Capture Wi-Fi password
Sigma detected: Potential Data Stealing Via Chromium Headless Debugging
Sigma detected: Suspicious Double Extension File Execution
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal WLAN passwords
Tries to steal Mail credentials (via file / registry access)
Uses an obfuscated file name to hide its real file extension (double extension)
Uses netsh to modify the Windows network and firewall settings
Yara detected AntiVM3
Yara detected Costura Assembly Loader
Yara detected Phantom stealer
Yara detected Stealerium
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1666134 Sample: AccountActivity_Apr15_2025.... Startdate: 16/04/2025 Architecture: WINDOWS Score: 100 77 mail.lightstartrading.com 2->77 79 lightstartrading.com 2->79 81 4 other IPs or domains 2->81 89 Malicious sample detected (through community Yara rule) 2->89 91 Antivirus detection for URL or domain 2->91 93 Antivirus / Scanner detection for submitted sample 2->93 95 14 other signatures 2->95 9 AccountActivity_Apr15_2025.PDF.exe 15 2 2->9         started        13 msedge.exe 2->13         started        15 msiexec.exe 2->15         started        signatures3 process4 dnsIp5 83 avenuetherapeutics.online 85.239.61.40, 443, 49691 RAINBOW-HKRainbownetworklimitedHK Russian Federation 9->83 105 Attempt to bypass Chrome Application-Bound Encryption 9->105 107 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 9->107 109 Found many strings related to Crypto-Wallets (likely being stolen) 9->109 111 4 other signatures 9->111 17 AccountActivity_Apr15_2025.PDF.exe 145 9->17         started        85 192.168.2.5, 138, 443, 49158 unknown unknown 13->85 87 239.255.255.250 unknown Reserved 13->87 22 msedge.exe 13->22         started        24 msedge.exe 13->24         started        26 msedge.exe 13->26         started        28 msedge.exe 13->28         started        signatures6 process7 dnsIp8 65 lightstartrading.com 170.10.162.116, 49771, 587 STEADFASTUS United States 17->65 67 icanhazip.com 104.16.185.241, 49694, 49765, 49767 CLOUDFLARENETUS United States 17->67 69 127.0.0.1 unknown unknown 17->69 57 C:\Users\user\AppData\...\ZTGJILHXQB.docx, ASCII 17->57 dropped 59 C:\Users\user\AppData\...\ZTGJILHXQB.docx, ASCII 17->59 dropped 61 C:\Users\user\AppData\...\UOOJJOZIRH.jpg, ASCII 17->61 dropped 63 3 other malicious files 17->63 dropped 97 Tries to steal Mail credentials (via file / registry access) 17->97 99 Found many strings related to Crypto-Wallets (likely being stolen) 17->99 101 Tries to harvest and steal browser information (history, passwords, etc) 17->101 103 2 other signatures 17->103 30 cmd.exe 1 17->30         started        33 cmd.exe 17->33         started        35 cmd.exe 17->35         started        37 msedge.exe 17->37         started        71 a416.dscd.akamai.net 104.76.210.80, 443, 49709, 49713 SEABONE-NETTELECOMITALIASPARKLESpAIT United States 22->71 73 a233.dscd.akamai.net 23.34.82.22, 443, 49714, 49715 SAUDINETSTC-ASSA United States 22->73 75 25 other IPs or domains 22->75 file9 signatures10 process11 signatures12 113 Uses netsh to modify the Windows network and firewall settings 30->113 115 Tries to harvest and steal WLAN passwords 30->115 39 conhost.exe 30->39         started        41 chcp.com 1 30->41         started        43 netsh.exe 30->43         started        45 findstr.exe 30->45         started        55 4 other processes 33->55 47 conhost.exe 35->47         started        49 chcp.com 35->49         started        51 netsh.exe 35->51         started        53 msedge.exe 37->53         started        process13
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4243b753fe99d9c39f63de939a9ecfa2aba49e92621b8f60e77311686d8b8551
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4243b753fe99d9c39f63de939a9ecfa2aba49e92621b8f60e77311686d8b8551/
Threat name:
ByteCode-MSIL.Downloader.Malgent
Create hunting rule
Status:
Malicious
First seen:
2025-04-16 06:51:59 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
18 of 24 (75.00%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ijb3ou76thm4hh3d32jzvhwpukv2jhusminy6yhhomiwq3mlqviq._file
Result
Malware family:
stealerium
Create hunting rule
Score:
  10/10
Tags:
family:stealerium collection credential_access discovery persistence privilege_escalation spyware stealer
Link:
https://tria.ge/reports/250416-jj9wyaztds/
Behaviour
outlook_win_path
Checks processor information in registry
Delays execution with timeout.exe
Enumerates system info in registry
Kills process with taskkill
Modifies data under HKEY_USERS
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
outlook_office_path
Browser Information Discovery
Enumerates physical storage devices
Event Triggered Execution: Netsh Helper DLL
System Location Discovery: System Language Discovery
System Network Configuration Discovery: Wi-Fi Discovery
Drops file in Windows directory
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Looks up external IP address via web service
Checks computer location settings
Reads user/profile data of web browsers
Uses browser remote debugging
Stealerium
Stealerium family
Verdict:
Malicious
Tags:
external_ip_lookup
YARA:
n/a
Link:
https://app.threat.zone/submission/4773d168-a569-4275-bdeb-70ae55243f4e
Unpacked files
SH256 hash:
4243b753fe99d9c39f63de939a9ecfa2aba49e92621b8f60e77311686d8b8551
MD5 hash:
91269ab921cf5d89d7e7abcbf5488f42
SHA1 hash:
7d4a540794f11438a25992de479a069340480ec7
Detections:
PureCrypter_Stage1
Create hunting rule
Link:
https://www.unpac.me/results/04183b89-abec-4f65-99af-a3a6ed6a62dd/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4243b753fe99/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:INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Author:ditekSHen
Description:Detects executables packed with SmartAssembly
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

Stealerium

Executable exe 4243b753fe99d9c39f63de939a9ecfa2aba49e92621b8f60e77311686d8b8551

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/2417/

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 (GUARD_CF)high

Comments