MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 740c6afe85c3b0084383a3598d6a49e9f07f58e7764fde5eb0367450672a6018. 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: 8
| SHA256 hash: | 740c6afe85c3b0084383a3598d6a49e9f07f58e7764fde5eb0367450672a6018 |
|---|---|
| SHA3-384 hash: | c649c9d8e60e4b9d58875261e52dfc4b7bded93633b7c0fc700ffdef34df0098a2b3b21e09a0ab25f885d6601a0c3584 |
| SHA1 hash: | a71b3242e95d103508c7d3b31766df3b8e4ab5dd |
| MD5 hash: | 17b32d5270a778baa555f13bb3c25b14 |
| humanhash: | batman-louisiana-michigan-nebraska |
| File name: | SecuriteInfo.com.Variant.Ursu.118857.7686.11703 |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 225'792 bytes |
| First seen: | 2021-05-25 13:01:01 UTC |
| Last seen: | 2021-05-26 13:07:34 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger) |
| ssdeep | 3072:+qs/d3plHNStfzoeAWRfS8ypYAxBWA3VcuVdxOTxbKUPuTQdseKp5KH5D11k58ry:K/J0tfUeAIQHuA36cdmbZPgSCKZD1vB |
| Threatray | 43 similar samples on MalwareBazaar |
| TLSH | CE24F05077547210CDE446BFCEDBC1B00BE7BA13B832E94B5454E6922537FAACEE025A |
| Reporter |  SecuriteInfoCom |
| Tags: | OskiStealer |
Indicators Of Compromise (IOCs)
Below is a list of indicators of compromise (IOCs) associated with this malware samples.
| IOC | ThreatFox Reference |
|---|---|
| http://45.133.1.47/6.jpg | https://threatfox.abuse.ch/ioc/59248/ |
| http://45.133.1.47/1.jpg | https://threatfox.abuse.ch/ioc/59249/ |
| http://45.133.1.47/2.jpg | https://threatfox.abuse.ch/ioc/59250/ |
| http://45.133.1.47/3.jpg | https://threatfox.abuse.ch/ioc/59251/ |
| http://45.133.1.47/4.jpg | https://threatfox.abuse.ch/ioc/59252/ |
| http://45.133.1.47/5.jpg | https://threatfox.abuse.ch/ioc/59253/ |
| http://45.133.1.47/7.jpg | https://threatfox.abuse.ch/ioc/59254/ |
Intelligence
File Origin
# of uploads :
3
# of downloads :
113
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Sending a UDP request
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a file
Connection attempt
Deleting a recently created file
Reading critical registry keys
Replacing files
Running batch commands
Creating a process with a hidden window
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Stealing user critical data
Launching a tool to kill processes
Enabling autorun by creating a file
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.
Result
Threat name:
Oski Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Creates an undocumented autostart registry key
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Crypto Currency Wallets
Writes to foreign memory regions
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Trojan.Ursu
Status:
Malicious
First seen:
2021-05-25 11:49:40 UTC
File Type:
PE (.Net Exe)
Extracted files:
27
AV detection:
18 of 29 (62.07%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
unknown
Similar samples:
+ 33 additional samples on MalwareBazaar
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski discovery infostealer spyware stealer
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
Malware Config
C2 Extraction:
45.133.1.47
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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_InTheFu |
|---|---|
| Author: | ditekSHen |
| Description: | Detect executables with stomped PE compilation timestamp that is greater than local current time |
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
Delivery method
Distributed via web download
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