MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 6fb172bb9c23b3a8067a40f09264c3fa8ecb4f081c659de59560c5d52364d9e9. 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
| SHA256 hash: | 6fb172bb9c23b3a8067a40f09264c3fa8ecb4f081c659de59560c5d52364d9e9 |
|---|---|
| SHA3-384 hash: | 15dec81e45b4353093da1e360fa815a173a5a45f04eacd34055d4f90e8faad74d62ff2d23cc7be7afc45e71241fdebfa |
| SHA1 hash: | f5f170eed6e8cfbf42f605e2a21bfcf1d772a348 |
| MD5 hash: | bf8ab0b1bfc29c194ef553d0246199d0 |
| humanhash: | princess-alaska-alaska-montana |
| File name: | 6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 1'485'560 bytes |
| First seen: | 2021-05-11 00:31:01 UTC |
| Last seen: | 2021-05-11 02:00:12 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger) |
| ssdeep | 24576:ZASkcYOBKG1qZPikojMoztjnzNzwxrXa4YYUkw:jDI1ik4M81nzNzMXa4YYvw |
| Threatray | 185 similar samples on MalwareBazaar |
| TLSH | 54659D31515E4955CAA11730DF9BD13D8731FE916222B3B76AEA3E9B3072232580C6FE |
| 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://45.87.2.131/6.jpg | https://threatfox.abuse.ch/ioc/35048/ |
| http://45.87.2.131/1.jpg | https://threatfox.abuse.ch/ioc/35049/ |
| http://45.87.2.131/2.jpg | https://threatfox.abuse.ch/ioc/35050/ |
| http://45.87.2.131/3.jpg | https://threatfox.abuse.ch/ioc/35051/ |
| http://45.87.2.131/4.jpg | https://threatfox.abuse.ch/ioc/35052/ |
| http://45.87.2.131/5.jpg | https://threatfox.abuse.ch/ioc/35053/ |
| http://45.87.2.131/7.jpg | https://threatfox.abuse.ch/ioc/35054/ |
Intelligence
File Origin
# of uploads :
3
# of downloads :
130
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Vidar
Result
Verdict:
Malware
Maliciousness:
Behaviour
Sending a UDP request
Creating a window
Unauthorized injection to a recently created process
Creating a file
Connection attempt
Launching the default Windows debugger (dwwin.exe)
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
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Injects a PE file into a foreign processes
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Tries to harvest and steal browser information (history, passwords, etc)
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Spyware.Negasteal
Status:
Malicious
First seen:
2021-05-06 00:40:47 UTC
AV detection:
22 of 29 (75.86%)
Threat level:
2/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 175 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 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
Reads user/profile data of web browsers
Oski
Malware Config
C2 Extraction:
45.87.2.131
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: | cert_blocklist_566ac16a57b132d3f64dced14de790ee |
|---|---|
| Author: | ReversingLabs |
| Description: | Certificate used for digitally signing malware. |
| Rule name: | INDICATOR_KB_CERT_566ac16a57b132d3f64dced14de790ee |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables signed with stolen, revoked or invalid certificates |
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | SUSP_Reversed_Base64_Encoded_EXE |
|---|---|
| Author: | Florian Roth |
| Description: | Detects an base64 encoded executable with reversed characters |
| Reference: | Internal Research |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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