MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 f8a3701ae1544e20c1c05352b41e29d92af9a015670a7cf0830ed9cfa92d2638. 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: | f8a3701ae1544e20c1c05352b41e29d92af9a015670a7cf0830ed9cfa92d2638 |
|---|---|
| SHA3-384 hash: | 235698dcad0e00b260b2fdc99b92b729287b8049dbcd3f6d1dabbfd235a3b040035672a0016ecb4db5534293aebaff3a |
| SHA1 hash: | cda7ae6c577616abeaedc22a7778df2c531286a7 |
| MD5 hash: | 8b044cbf9b624f6e661b20909a7ae5b2 |
| humanhash: | vegan-harry-may-alabama |
| File name: | 8b044cbf9b624f6e661b20909a7ae5b2 |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 519'304 bytes |
| First seen: | 2021-06-29 14:35:24 UTC |
| Last seen: | 2021-06-29 15:46:03 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger) |
| ssdeep | 12288:zOxAmG+OZ06IRbv82Fkznh4afOFJo9XKSEnljL8DP:zOxjaZ06IRbNkznaFOktcP |
| Threatray | 1 similar samples on MalwareBazaar |
| TLSH | 9CB4DF1221A98D77F2031C7A4C6EE2A115D72D645025E51E72AE360F1AF232613FFB6F |
| Reporter |  zbetcheckin |
| Tags: | 32 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/osw//6.jpg | https://threatfox.abuse.ch/ioc/155750/ |
| http://195.133.40.227/osw//1.jpg | https://threatfox.abuse.ch/ioc/155751/ |
| http://195.133.40.227/osw//2.jpg | https://threatfox.abuse.ch/ioc/155752/ |
| http://195.133.40.227/osw//3.jpg | https://threatfox.abuse.ch/ioc/155753/ |
| http://195.133.40.227/osw//4.jpg | https://threatfox.abuse.ch/ioc/155754/ |
| http://195.133.40.227/osw//5.jpg | https://threatfox.abuse.ch/ioc/155755/ |
| http://195.133.40.227/osw//7.jpg | https://threatfox.abuse.ch/ioc/155756/ |
Intelligence
File Origin
# of uploads :
2
# of downloads :
160
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
8b044cbf9b624f6e661b20909a7ae5b2
Verdict:
Suspicious activity
Analysis date:
2021-06-29 14:39:29 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Detection(s):
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:
NanoCoreRAT
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
Posts data to a JPG file (protocol mismatch)
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
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 AntiVM3
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Packed.Generic
Status:
Suspicious
First seen:
2021-06-29 14:36:14 UTC
AV detection:
11 of 28 (39.29%)
Threat level:
1/5
Detection(s):
Suspicious file
Verdict:
unknown
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/osw/
Unpacked files
SH256 hash:
3b038d6a7bb3715da405210dfa872b480dc15a86d5aa42a2f26bd62bbaa6d210
MD5 hash:
623da614c58a42580b9a938f9c439eea
SHA1 hash:
fbc87cfe4e31674f2502566af74e002bc863da1c
SH256 hash:
7ab8ce260ac07289d3f9726ff91fce03869ffea3630f206820258de62cb47208
MD5 hash:
1e75e9da1b19043934a0ff30cf1cb3e1
SHA1 hash:
6bd987f878902ca2ff0a12ba10a8d6458be285f0
SH256 hash:
f8a3701ae1544e20c1c05352b41e29d92af9a015670a7cf0830ed9cfa92d2638
MD5 hash:
8b044cbf9b624f6e661b20909a7ae5b2
SHA1 hash:
cda7ae6c577616abeaedc22a7778df2c531286a7
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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