MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cc99103c2b2431735eafa0f059e103799dc70caf73feebcc4e1e4ffaa1f2d774. 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: 10


Intelligence 10 IOCs 7 YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cc99103c2b2431735eafa0f059e103799dc70caf73feebcc4e1e4ffaa1f2d774
SHA3-384 hash: 6908c4521a749eae92fac9a5da3a3fecea4333ac3a1e3c6c2fdc820711b7180bd8f6b46fe9948670acd0374ab2fc5a49
SHA1 hash: 346853889f6b72f50221de317d4b5ad65c20b2cf
MD5 hash: 2a626d2c4ebf54a380855a022db81be3
humanhash: don-india-georgia-beryllium
File name:1-3.txt
Download: download sample
Signature OskiStealer
Create hunting rule
File size:335'363 bytes
First seen:2021-06-08 12:57:05 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 7bb9d345a5fec4fbbf5100d6a3ffbb8c (88 x ArkeiStealer, 85 x OskiStealer, 1 x Reconyc)
ssdeep 6144:WfUauY68uSWCx+XA7mg2pNG1Ljo3cUW3ZVQpLqTAcrT:WwY68u1Cx+wm/pCstywKAM
TLSH 8C647C217680C231D85214B8C4FB867927E9BA632B76D1C77BC40A961F213F1ED7678B
Reporter srcr
Tags:exe OskiStealer

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
http://103.114.107.28/l1//1.jpg https://threatfox.abuse.ch/ioc/73810/
http://103.114.107.28/l1//6.jpg https://threatfox.abuse.ch/ioc/73811/
http://103.114.107.28/l1//5.jpg https://threatfox.abuse.ch/ioc/73812/
http://103.114.107.28/l1//7.jpg https://threatfox.abuse.ch/ioc/73813/
http://103.114.107.28/l1//2.jpg https://threatfox.abuse.ch/ioc/73814/
http://103.114.107.28/l1//3.jpg https://threatfox.abuse.ch/ioc/73815/
http://103.114.107.28/l1//4.jpg https://threatfox.abuse.ch/ioc/73816/

Intelligence

File Origin
# of uploads :
1
# of downloads :
82
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Vidar
Create hunting rule
Link:
https://www.capesandbox.com/analysis/165293/
Detection(s):
Win.Malware.Zusy-9781646-0
Create hunting rule

ditekSHen.MALWARE.Win.Trojan.Vidar.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Connection attempt
Creating a file
Sending a UDP request
Deleting a recently created file
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.
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
96 / 100
Link:
https://www.joesandbox.com/analysis/798782
Signature
Antivirus / Scanner detection for submitted sample
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
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
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/cc99103c2b2431735eafa0f059e103799dc70caf73feebcc4e1e4ffaa1f2d774/
Threat name:
Win32.Spyware.AveMaria
Create hunting rule
Status:
Malicious
First seen:
2021-06-08 12:58:12 UTC
AV detection:
26 of 28 (92.86%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zsmrapbleqyxgxvpudyftyidpgo4odfpop7oxtcodzh7vips252a._file
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer
Link:
https://tria.ge/reports/210608-514a22mx6n/
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
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
Unpacked files
SH256 hash:
cc99103c2b2431735eafa0f059e103799dc70caf73feebcc4e1e4ffaa1f2d774
MD5 hash:
2a626d2c4ebf54a380855a022db81be3
SHA1 hash:
346853889f6b72f50221de317d4b5ad65c20b2cf
Detections:
win_oski_auto
Create hunting rule
win_oski_g0
Create hunting rule
Link:
https://www.unpac.me/results/ec747576-1a09-42f1-a9f2-85a22d2e4c20/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/cc99103c2b2431735eafa0f059e103799dc70caf73feebcc4e1e4ffaa1f2d774

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
Create hunting rule
Author:ditekSHen
Description:Detects Vidar / ArkeiStealer
Rule name:Vidar
Create hunting rule
Author:kevoreilly
Description:Vidar Payload
Rule name:win_oski_auto
Create hunting rule
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.

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/165293/

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