MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 4ef18eccdff8a6864d4396cff7d375158ac09fcb409d595a125b9756bee2c2e2. 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: | 4ef18eccdff8a6864d4396cff7d375158ac09fcb409d595a125b9756bee2c2e2 |
|---|---|
| SHA3-384 hash: | 7e880a1b4f48d7d53d988a63a12c752137eab6689db32af5b40e78be0b5ff79a68859f8db557210e16d2f87be2b3254c |
| SHA1 hash: | fb55d7e7f5f2f3446855eab0fc8924ec227c1e17 |
| MD5 hash: | 06a73490e2744b765871db1ebf92d843 |
| humanhash: | wyoming-beer-saturn-white |
| File name: | RFQ-G-4786.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 249'149 bytes |
| First seen: | 2021-06-14 11:10:37 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 099c0646ea7282d232219f8807883be0 (476 x Formbook, 210 x Loki, 107 x AgentTesla) |
| ssdeep | 6144:ksZRnuPMMy5UnJbDVAdtbN1NJBOmQDG9e:3qu5abpA7x1ROmQDG9e |
| Threatray | 1'618 similar samples on MalwareBazaar |
| TLSH | F4342330BAE1C05FF627527107EB5A5BF2BBA68F1994074BF7152F8E1A391C70A0714A |
| 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://irk1990.xyz/6.jpg | https://threatfox.abuse.ch/ioc/104528/ |
| http://irk1990.xyz/1.jpg | https://threatfox.abuse.ch/ioc/104529/ |
| http://irk1990.xyz/2.jpg | https://threatfox.abuse.ch/ioc/104530/ |
| http://irk1990.xyz/3.jpg | https://threatfox.abuse.ch/ioc/104531/ |
| http://irk1990.xyz/4.jpg | https://threatfox.abuse.ch/ioc/104532/ |
| http://irk1990.xyz/5.jpg | https://threatfox.abuse.ch/ioc/104533/ |
| http://irk1990.xyz/7.jpg | https://threatfox.abuse.ch/ioc/104534/ |
Intelligence
File Origin
# of uploads :
1
# of downloads :
196
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ-G-4786.exe
Verdict:
Malicious activity
Analysis date:
2021-06-14 11:12:13 UTC
Tags:
installer
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Creating a file
DNS request
Unauthorized injection to a recently created process
Connection attempt
Deleting a recently created file
Sending a UDP request
Reading critical registry keys
Replacing files
Creating a window
Delayed writing of the file
Running batch commands
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
Searching for the window
Stealing user critical data
Launching a tool to kill processes
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:
Oski Stealer
Verdict:
Malicious
Result
Threat name:
Oski
Detection:
malicious
Classification:
troj.spyw.evad
Score:
80 / 100
Signature
Downloads files with wrong headers with respect to MIME Content-Type
Found many strings related to Crypto-Wallets (likely being stolen)
Injects a PE file into a foreign processes
Machine Learning detection for sample
Performs DNS queries to domains with low reputation
Posts data to a JPG file (protocol mismatch)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Crypto Currency Wallets
Yara detected Oski Stealer
Behaviour
Behavior Graph:
Threat name:
Win32.Spyware.Noon
Status:
Malicious
First seen:
2021-06-14 11:11:08 UTC
AV detection:
15 of 29 (51.72%)
Threat level:
2/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 1'608 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 behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
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
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
Malware Config
C2 Extraction:
irk1990.xyz
Unpacked files
SH256 hash:
4ef18eccdff8a6864d4396cff7d375158ac09fcb409d595a125b9756bee2c2e2
MD5 hash:
06a73490e2744b765871db1ebf92d843
SHA1 hash:
fb55d7e7f5f2f3446855eab0fc8924ec227c1e17
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.67
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: | MALWARE_Win_Vidar |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Vidar / ArkeiStealer |
| Rule name: | Vidar |
|---|---|
| Author: | kevoreilly |
| Description: | Vidar Payload |
| Rule name: | win_oski_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | autogenerated rule brought to you by yara-signator |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
No further information available
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