MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 223dfd54929007ac23d6a20dbcf81a519a14f1c4061d23afcb761b75796042d2. 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: | 223dfd54929007ac23d6a20dbcf81a519a14f1c4061d23afcb761b75796042d2 |
|---|---|
| SHA3-384 hash: | 698c292917667306ec798c175479dbc8744ef088caa0d577b305fdb6014a8dd874ee6063d66a982766663cf28d58fdff |
| SHA1 hash: | cf0098c51761c3c9b860cdfd290734f0d1657bba |
| MD5 hash: | da484abefb23789c13add9ecd7ea7eeb |
| humanhash: | carbon-golf-connecticut-harry |
| File name: | da484abefb23789c13add9ecd7ea7eeb.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 709'632 bytes |
| First seen: | 2021-08-03 11:16:27 UTC |
| Last seen: | 2021-08-03 12:18:05 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger) |
| ssdeep | 6144:eR5RLb7fVUQdGoKtqyknjzIaC+APzRXks3ccv78vSvFvvUvsvlvzvLvbv+vhvtDf:eR5NVbdjKcVPIjPzRXks3rgpES |
| Threatray | 2'232 similar samples on MalwareBazaar |
| TLSH | T197E4FAAC16160948F3BA84BCF4764DFF6380A96FC067B2E7536E53E364AC2C059E24D5 |
| 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://2.56.59.226/www//6.jpg | https://threatfox.abuse.ch/ioc/165519/ |
| http://2.56.59.226/www//1.jpg | https://threatfox.abuse.ch/ioc/165520/ |
| http://2.56.59.226/www//7.jpg | https://threatfox.abuse.ch/ioc/165521/ |
| http://2.56.59.226/www//2.jpg | https://threatfox.abuse.ch/ioc/165522/ |
| http://2.56.59.226/www//3.jpg | https://threatfox.abuse.ch/ioc/165523/ |
| http://2.56.59.226/www//4.jpg | https://threatfox.abuse.ch/ioc/165524/ |
| http://2.56.59.226/www//5.jpg | https://threatfox.abuse.ch/ioc/165525/ |
Intelligence
File Origin
# of uploads :
2
# of downloads :
127
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
T31597377-Confirm-20210802-100016-Email-5007377.doc
Verdict:
Malicious activity
Analysis date:
2021-08-03 08:40:05 UTC
Tags:
ole-embedded loader
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
Creating a window
Searching for the window
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
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.
Verdict:
Malicious
Result
Threat name:
Oski Vidar
Detection:
malicious
Classification:
troj.spyw
Score:
92 / 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)
Machine Learning detection for sample
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.Trojan.Zilla
Status:
Malicious
First seen:
2021-08-03 11:17:07 UTC
AV detection:
16 of 46 (34.78%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 2'222 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
Modifies Internet Explorer settings
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
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:
http://2.56.59.226/www/
Unpacked files
SH256 hash:
53b5c36964c9c74a6abbacdb7817f14fa9717bcb17b61561bd182848da3cc488
MD5 hash:
574750b54f0d810cfc4be86501ecb7e1
SHA1 hash:
c6ff9c568061437f407dfff03c5c37aa068dcbc5
SH256 hash:
223dfd54929007ac23d6a20dbcf81a519a14f1c4061d23afcb761b75796042d2
MD5 hash:
da484abefb23789c13add9ecd7ea7eeb
SHA1 hash:
cf0098c51761c3c9b860cdfd290734f0d1657bba
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.38
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 |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
Delivery method
Distributed via web download
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