MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 83e8782266edec54f4c451f60e2095864c8a9d817e7296076e128c686a6bfea3. 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: 13
| SHA256 hash: | 83e8782266edec54f4c451f60e2095864c8a9d817e7296076e128c686a6bfea3 |
|---|---|
| SHA3-384 hash: | 5a9172404dde9b1d46df59925b2794578b667cdca8166f0a6240dd56bbc08af8280ca38cf17fb3571f024c7c92cb6b52 |
| SHA1 hash: | 8212db43ee02260bc150364213c1534b648f1da8 |
| MD5 hash: | 1110d573c57860b4ba2719fb17f508b9 |
| humanhash: | alanine-oxygen-five-shade |
| File name: | payment.pdf.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 729'088 bytes |
| First seen: | 2021-08-25 12:20:21 UTC |
| Last seen: | 2021-09-04 06:15:30 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:en34ViF3zSxwWIQ8VHjuuRImRclE2hao+coM2algtZZES43Tf4Po1yfMa6hVehXm:Ot3zDkijpRubota2ZZqFI |
| Threatray | 2'851 similar samples on MalwareBazaar |
| TLSH | T12EF4E0AD721475EFC82BC9729A981C64EBA0B47B530BD203A45315EE9E0E6D7CF141F2 |
| Reporter |  GovCERT_CH |
| Tags: | exe OskiStealer |
Intelligence
File Origin
# of uploads :
3
# of downloads :
180
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
payment.pdf.exe
Verdict:
Malicious activity
Analysis date:
2021-08-25 12:22:21 UTC
Tags:
trojan stealer vidar
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Vidar
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
DNS request
Connecting to a non-recommended domain
Connection attempt
Deleting a recently created file
Reading critical registry keys
Replacing files
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 Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Detected unpacking (changes PE section rights)
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Initial sample is a PE file and has a suspicious name
Machine Learning detection for sample
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Sigma detected: Suspicious Double Extension
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
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected AntiVM3
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Trojan.Generic
Status:
Suspicious
First seen:
2021-08-25 10:04:33 UTC
AV detection:
14 of 40 (35.00%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 2'841 additional samples on MalwareBazaar
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski discovery infostealer spyware stealer suricata
Behaviour
Checks processor information in registry
Kills process with taskkill
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
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
Malware Config
C2 Extraction:
try.divendesign.in
Unpacked files
SH256 hash:
6912e4bedd1288f116e968f0a79d9797f6d6bd24d45a5f10c52e20f9d33b8c61
MD5 hash:
03bde4a82ad64c0f314985232fbca3fa
SHA1 hash:
e8d0b6339e94192eaaca32c812f914e60576dca6
SH256 hash:
eed7b6a75a58143e8f5e982270f7f8555debec91e6eb04a7e6948d5fc458d9d8
MD5 hash:
89ba5d39b827f01f6c5f99d324ad782f
SHA1 hash:
6af7ef21ccdd59632c7beb65899b959a6d935a22
Detections:
win_oski_g0
win_oski_auto
SH256 hash:
16274898415e49e63dd3ddf70cab7dfe357e495f0bbc236065a13716598d27bd
MD5 hash:
0b4c439652f1b1bab519670543b86860
SHA1 hash:
57d73f0377b7f39828a08d04222ac49deb1698da
SH256 hash:
83e8782266edec54f4c451f60e2095864c8a9d817e7296076e128c686a6bfea3
MD5 hash:
1110d573c57860b4ba2719fb17f508b9
SHA1 hash:
8212db43ee02260bc150364213c1534b648f1da8
Verdict:
Malicious
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: | MALWARE_Win_Vidar |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Vidar / ArkeiStealer |
| Rule name: | pe_imphash |
|---|
| 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: | Detects win.oski. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
Comments
Login required
You need to login to in order to write a comment. Login with your abuse.ch account.