MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 3aeccf51ec935646a4987a1683d5dd8a251d171d326041282759753e371dff4f. 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: 9
| SHA256 hash: | 3aeccf51ec935646a4987a1683d5dd8a251d171d326041282759753e371dff4f |
|---|---|
| SHA3-384 hash: | 44701d5ff1e2583bb0035df45996b49162c5316f25694a23b2e1aa7033ef77d2f56efb7f56e5c09035532d7818c5e052 |
| SHA1 hash: | 8bbef0b2f1610c5633bcd4ee890ec80a9048d5ab |
| MD5 hash: | c9a1b007056db76f8fbb1d3115977181 |
| humanhash: | coffee-fruit-arkansas-pip |
| File name: | C9A1B007056DB76F8FBB1D3115977181.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 27'262'976 bytes |
| First seen: | 2021-04-26 06:36:13 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger) |
| ssdeep | 12288:m1Pnba+qsLi88sE/HDAG3CP43IaZXwFD1sPqd8NVm9+KJjyJiOc5Z:QPnbgTWVG3CsIa+FD1sPqIIrAIZ |
| Threatray | 1'036 similar samples on MalwareBazaar |
| TLSH | 0D571261AB8CF7EED84D0B71D851993252334313D349DA5FE88D10489BE5786F8AC3EA |
| 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://31.210.20.147/6.jpg | https://threatfox.abuse.ch/ioc/10021/ |
| http://31.210.20.147/1.jpg | https://threatfox.abuse.ch/ioc/10022/ |
| http://31.210.20.147/2.jpg | https://threatfox.abuse.ch/ioc/10023/ |
| http://31.210.20.147/3.jpg | https://threatfox.abuse.ch/ioc/10024/ |
| http://31.210.20.147/4.jpg | https://threatfox.abuse.ch/ioc/10025/ |
| http://31.210.20.147/5.jpg | https://threatfox.abuse.ch/ioc/10026/ |
| http://31.210.20.147/7.jpg | https://threatfox.abuse.ch/ioc/10027/ |
Intelligence
File Origin
# of uploads :
1
# of downloads :
141
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
C9A1B007056DB76F8FBB1D3115977181.exe
Verdict:
Malicious activity
Analysis date:
2021-04-26 06:39:46 UTC
Tags:
trojan stealer vidar loader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
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:
UNKNOWN
Result
Threat name:
Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Downloads files with wrong headers with respect to MIME Content-Type
Found many strings related to Crypto-Wallets (likely being stolen)
Injects a PE file into a foreign processes
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)
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
Yara detected AntiVM3
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Gathering data
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Status:
Malicious
First seen:
2021-04-24 04:12:00 UTC
AV detection:
15 of 29 (51.72%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 1'026 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
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
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: | 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 |
| Rule name: | win_oski_g0 |
|---|---|
| Author: | Slavo Greminger, SWITCH-CERT |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
No further information available
Comments
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MBC behaviors list (github.com/accidentalrebel/mbcscan):
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0) [B0009] Anti-Behavioral Analysis::Virtual Machine Detection