MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 90a9ef1c549a9f2646f6c603e27570832f371d25d2fc4b967c96f55fa034e557. 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: 11
| SHA256 hash: | 90a9ef1c549a9f2646f6c603e27570832f371d25d2fc4b967c96f55fa034e557 |
|---|---|
| SHA3-384 hash: | 58e0f89d6213b9acd705953dad3b6d1ce00504b351a6d489a5ebdce03be58d24b7f1fed25e89afd840a103c799b1cc8d |
| SHA1 hash: | a0162b62231692e94ca41aac27cec6063179a9da |
| MD5 hash: | 5ad9f6be601fb9f23677c239c91deae2 |
| humanhash: | rugby-bakerloo-stairway-iowa |
| File name: | GHS5333HBC5TR.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 321'216 bytes |
| First seen: | 2021-07-27 08:30:12 UTC |
| Last seen: | 2021-07-30 07:13:25 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 19abb3665ae1ff2bd877ad7bd730dcae (3 x Formbook, 2 x Loki, 1 x AgentTesla) |
| ssdeep | 6144:Vd53TvpHeIl0yL6PKXDiFachVUGeUap2nRcUn3GYUKxn8gNMoPPUbyK+LwiwT6Z8:Vd53TvpHeIl0yL6muFxhSGeunagIsnBY |
| Threatray | 2'193 similar samples on MalwareBazaar |
| TLSH | T142640258BBADCE34E0C240BDA3796575423FA9F9130F94EB9701385EE492AC5CA31727 |
| dhash icon | f9f8c0c0c0c0c0c0 (2 x OskiStealer) |
| 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://evakark.xyz/6.jpg | https://threatfox.abuse.ch/ioc/162936/ |
| http://evakark.xyz/1.jpg | https://threatfox.abuse.ch/ioc/162937/ |
| http://evakark.xyz/2.jpg | https://threatfox.abuse.ch/ioc/162938/ |
| http://evakark.xyz/3.jpg | https://threatfox.abuse.ch/ioc/162939/ |
| http://evakark.xyz/4.jpg | https://threatfox.abuse.ch/ioc/162940/ |
| http://evakark.xyz/5.jpg | https://threatfox.abuse.ch/ioc/162941/ |
| http://evakark.xyz/7.jpg | https://threatfox.abuse.ch/ioc/162942/ |
Intelligence
File Origin
# of uploads :
3
# of downloads :
125
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
GHS5333HBC5TR.exe
Verdict:
Malicious activity
Analysis date:
2021-07-27 08:31:56 UTC
Tags:
trojan stealer vidar loader phishing
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Result
Verdict:
Malware
Maliciousness:
Behaviour
Unauthorized injection to a recently created process
DNS request
Connection attempt
Creating a file
Launching the default Windows debugger (dwwin.exe)
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.
Malware family:
Oski Stealer
Verdict:
Malicious
Result
Threat name:
Oski Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
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
Maps a DLL or memory area into another process
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
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:
Gathering data
Threat name:
Win32.Trojan.Zenpak
Status:
Malicious
First seen:
2021-07-27 08:31:05 UTC
AV detection:
17 of 46 (36.96%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 2'183 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 behavior: MapViewOfSection
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
Malware Config
C2 Extraction:
evakark.xyz
Unpacked files
SH256 hash:
69ac4667c38cc5f08ed01c3a6a8930b31738d74bfc8b7ec0642bf298c1c40bb3
MD5 hash:
1184ce7616e75754536f7468440f12bb
SHA1 hash:
34c6641b47a5efa0934d73466abe83c42b2ee6ed
Detections:
win_oski_g0
win_oski_auto
SH256 hash:
90a9ef1c549a9f2646f6c603e27570832f371d25d2fc4b967c96f55fa034e557
MD5 hash:
5ad9f6be601fb9f23677c239c91deae2
SHA1 hash:
a0162b62231692e94ca41aac27cec6063179a9da
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: | Detects win.oski. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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