MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 6ab28a843d5ad26feee60448dfbbb5ddba73da6d5dc5a6a6fb9c0129bc7e3bf6. 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: | 6ab28a843d5ad26feee60448dfbbb5ddba73da6d5dc5a6a6fb9c0129bc7e3bf6 |
|---|---|
| SHA3-384 hash: | c8b5ece74ef2e538ff19ebf69019ea8f9d56264e4bb966872087d14a408cd3f565e90ad1c29efee3ee69f1ad01bb9c11 |
| SHA1 hash: | c225f31c999580ba3d0bdbf2f2510eb43d583bc1 |
| MD5 hash: | 8d1a835aec4a08b9f3bd3be40c3de3e4 |
| humanhash: | aspen-fix-undress-equal |
| File name: | 8d1a835aec4a08b9f3bd3be40c3de3e4.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 541'696 bytes |
| First seen: | 2021-06-30 08:51:03 UTC |
| Last seen: | 2021-06-30 09:50:27 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'660 x AgentTesla, 19'470 x Formbook, 12'208 x SnakeKeylogger) |
| ssdeep | 12288:rEFVzMF4sgqoYQxnqkkXu/Scm6pjL8DP:YaToYQxqkk6e6xcP |
| Threatray | 1'605 similar samples on MalwareBazaar |
| TLSH | 37B4DF1231449D6BE2071CBA8C0ED2B215E6AD655066F61C71AE335F08F236263EFB5F |
| 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://195.133.40.227/az//6.jpg | https://threatfox.abuse.ch/ioc/156122/ |
| http://195.133.40.227/az//1.jpg | https://threatfox.abuse.ch/ioc/156123/ |
| http://195.133.40.227/az//7.jpg | https://threatfox.abuse.ch/ioc/156124/ |
| http://195.133.40.227/az//2.jpg | https://threatfox.abuse.ch/ioc/156125/ |
| http://195.133.40.227/az//3.jpg | https://threatfox.abuse.ch/ioc/156126/ |
| http://195.133.40.227/az//4.jpg | https://threatfox.abuse.ch/ioc/156127/ |
| http://195.133.40.227/az//5.jpg | https://threatfox.abuse.ch/ioc/156128/ |
Intelligence
File Origin
# of uploads :
2
# of downloads :
145
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
8d1a835aec4a08b9f3bd3be40c3de3e4.exe
Verdict:
Malicious activity
Analysis date:
2021-06-30 08:54:50 UTC
Tags:
trojan stealer vidar opendir loader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Vidar
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 Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
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 submitted file
Posts data to a JPG file (protocol mismatch)
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
Writes to foreign memory regions
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Detection(s):
Suspicious file
Verdict:
malicious
Similar samples:
+ 1'595 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
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
Malware Config
C2 Extraction:
195.133.40.227/az/
Unpacked files
SH256 hash:
21f719d649889d624aa49c553b20982a35b27413018c70226d1ccd2415717028
MD5 hash:
548e154e73269cd5ad0682393ec4fd8e
SHA1 hash:
d64d5e0425099f45703e067171b2cf7bab0677ce
SH256 hash:
ed58be7eaabf9d33faf49ad967b2b044b0995773eaf33256c71b34cd41912f20
MD5 hash:
b1c14b94eea6bf154fa58b2221715216
SHA1 hash:
8f6fa9e0cf11d2db849ed9f1b345f4597fd41606
Detections:
win_oski_g0
win_oski_auto
SH256 hash:
9c4bc4caac3c613bff2fc0c479da9254f306d41901866375377ca97bea696a38
MD5 hash:
8296350ce886c1a69c4d97b0d0b54a3f
SHA1 hash:
5fe10c29ca8b83702275dd241e88dea6bf791420
SH256 hash:
6ab28a843d5ad26feee60448dfbbb5ddba73da6d5dc5a6a6fb9c0129bc7e3bf6
MD5 hash:
8d1a835aec4a08b9f3bd3be40c3de3e4
SHA1 hash:
c225f31c999580ba3d0bdbf2f2510eb43d583bc1
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: | 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: | 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.
Web download
Delivery method
Distributed via web download
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