MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 d9a8ff42d8a53247338920a5d7c8f2ecbb512d9e81334e68d1c54a6cc46c5351. 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
OskiStealer
Vendor detections: 11
| SHA256 hash: | d9a8ff42d8a53247338920a5d7c8f2ecbb512d9e81334e68d1c54a6cc46c5351 |
|---|---|
| SHA3-384 hash: | ebc3347a05535a7d4f11ab4d4c7700a8a9fc9f93c722a3c19cc54bb25b4d8b643b6920eb018923fbc16ab8c919080b2e |
| SHA1 hash: | 64ae8ad39ba354adb009b2d2836eea5d8fe893f7 |
| MD5 hash: | 19623242f86476316add324df9105497 |
| humanhash: | shade-emma-sodium-neptune |
| File name: | 19623242f86476316add324df9105497.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 914'432 bytes |
| First seen: | 2022-01-02 17:15:38 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger) |
| ssdeep | 24576:rLZvEGq5L1oKXvi6P+Qpm39JPvGoCjPZ:rZZq5BZJ4HXSPZ |
| Threatray | 3'570 similar samples on MalwareBazaar |
| TLSH | T1D315F198955C89EBD033AB3901670F347E2C3DB2D265F70A84758D9FD2AE2C1193AD8D |
| Reporter |  abuse_ch |
| Tags: | exe OskiStealer |
Indicators Of Compromise (IOCs)
Below is a list of indicators of compromise (IOCs) associated with this malware samples.
| IOC | ThreatFox Reference |
|---|---|
| http://destad.axfree.com/6.jpg | https://threatfox.abuse.ch/ioc/290552/ |
| http://destad.axfree.com/1.jpg | https://threatfox.abuse.ch/ioc/290553/ |
| http://destad.axfree.com/2.jpg | https://threatfox.abuse.ch/ioc/290554/ |
| http://destad.axfree.com/3.jpg | https://threatfox.abuse.ch/ioc/290556/ |
| http://destad.axfree.com/4.jpg | https://threatfox.abuse.ch/ioc/290558/ |
| http://destad.axfree.com/5.jpg | https://threatfox.abuse.ch/ioc/290559/ |
| http://destad.axfree.com/7.jpg | https://threatfox.abuse.ch/ioc/290561/ |
Intelligence
File Origin
# of uploads :
1
# of downloads :
285
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
19623242f86476316add324df9105497.exe
Verdict:
Suspicious activity
Analysis date:
2022-01-02 17:19:31 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Vidar
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
Adding an access-denied ACE
DNS request
Launching a process
Creating a file
Reading critical registry keys
Creating a window
Delayed writing of the file
Сreating synchronization primitives
Sending a custom TCP request
Running batch commands
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
Stealing user critical data
Launching a tool to kill processes
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
5/10
Confidence:
100%
Tags:
packed
Result
Verdict:
UNKNOWN
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:
Oski Stealer
Verdict:
Malicious
Result
Threat name:
Oski Stealer Vidar
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
.NET source code contains very large array initializations
C2 URLs / IPs found in malware configuration
Contains functionality to hide user accounts
DLL side loading technique detected
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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 steal Crypto Currency Wallets
Yara detected AntiVM3
Yara detected Oski Stealer
Yara detected UAC Bypass using CMSTP
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Spyware.AveMaria
Status:
Malicious
First seen:
2021-12-20 14:42:42 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
21 of 43 (48.84%)
Threat level:
2/5
Detection(s):
Suspicious file
Verdict:
malicious
Similar samples:
+ 3'560 additional samples on MalwareBazaar
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski infostealer spyware suricata
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Loads dropped DLL
Uses the VBS compiler for execution
Downloads MZ/PE file
Oski
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
Malware Config
C2 Extraction:
destad.axfree.com
Unpacked files
SH256 hash:
d9a8ff42d8a53247338920a5d7c8f2ecbb512d9e81334e68d1c54a6cc46c5351
MD5 hash:
19623242f86476316add324df9105497
SHA1 hash:
64ae8ad39ba354adb009b2d2836eea5d8fe893f7
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.38
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_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture |
|---|---|
| Author: | ditekSHen |
| Description: | Detect executables with stomped PE compilation timestamp that is greater than local current time |
| Rule name: | MALWARE_Win_Vidar |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Vidar / ArkeiStealer |
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | Vidar |
|---|---|
| Author: | kevoreilly |
| Description: | Vidar Payload |
| Rule name: | win_oski_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | Detects win.oski. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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