MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 138ccd9e494958214619110418407a634db9d8b073be4ffcd7d23083b58fb945. 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: | 138ccd9e494958214619110418407a634db9d8b073be4ffcd7d23083b58fb945 |
|---|---|
| SHA3-384 hash: | 88286181e960af859f15004e92ff974aca0b10e1ee1c31c7a24b1eb1654519c493ce2878e502befb0ff06ea9aedae72e |
| SHA1 hash: | d2d1452cd22f11e136c6d96467f893aee0477398 |
| MD5 hash: | bdddbdfd52d8740ae768c48788804531 |
| humanhash: | quebec-asparagus-twelve-kentucky |
| File name: | Purchase Order 07052021.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 839'168 bytes |
| First seen: | 2021-05-07 10:25:24 UTC |
| Last seen: | 2021-05-07 12:57:12 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger) |
| ssdeep | 12288:cfPNn6chBMB0phupuG9gWXNUMbPeY7mECcsOIy3jh86UVcZgT5EvOBg1R/M:u3MmouG9TRbmHcsU186Ud6/ |
| Threatray | 1'146 similar samples on MalwareBazaar |
| TLSH | 0A0502B8AAEDDD6DC07E143C203051510D72AF875A03F7EC519CBC76ED32741AA692BA |
| 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://209.141.49.199/6.jpg | https://threatfox.abuse.ch/ioc/30469/ |
| http://209.141.49.199/1.jpg | https://threatfox.abuse.ch/ioc/30470/ |
| http://209.141.49.199/2.jpg | https://threatfox.abuse.ch/ioc/30471/ |
| http://209.141.49.199/3.jpg | https://threatfox.abuse.ch/ioc/30472/ |
| http://209.141.49.199/4.jpg | https://threatfox.abuse.ch/ioc/30473/ |
| http://209.141.49.199/5.jpg | https://threatfox.abuse.ch/ioc/30474/ |
| http://209.141.49.199/7.jpg | https://threatfox.abuse.ch/ioc/30475/ |
Intelligence
File Origin
# of uploads :
3
# of downloads :
139
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Detection(s):
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Sending a UDP request
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.
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)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for sample
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 Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Trojan.Taskun
Status:
Malicious
First seen:
2021-05-07 10:26:17 UTC
File Type:
PE (.Net Exe)
Extracted files:
16
AV detection:
15 of 29 (51.72%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 1'136 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
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
Malware Config
C2 Extraction:
209.141.49.199
Unpacked files
SH256 hash:
bdf79e57b5574f9bafb56f6d0592f5ee429df7eb0ad536fbdb4f2956aae36f87
MD5 hash:
826b29e2a141b055a5491c9d7dc6eea7
SHA1 hash:
af4201362b8603bf7e4b6e2ead1cfb610dd7c0a9
SH256 hash:
138ccd9e494958214619110418407a634db9d8b073be4ffcd7d23083b58fb945
MD5 hash:
bdddbdfd52d8740ae768c48788804531
SHA1 hash:
d2d1452cd22f11e136c6d96467f893aee0477398
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: | 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.
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