MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 33a271b57993a4279618294783f95d3634d0358b5030ea48cf9896475e3d8546. 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: 13
| SHA256 hash: | 33a271b57993a4279618294783f95d3634d0358b5030ea48cf9896475e3d8546 |
|---|---|
| SHA3-384 hash: | e4d26e627612105caa822d59370aab3cb6d99ad4f1394da4ffff84116bec8f2fb947a777f7f9903640cfdffcb5b497dc |
| SHA1 hash: | 82df0deecb2c8da591a57e0bc5e92922209b5629 |
| MD5 hash: | ad8b81f4f8609bf5583c38cb017f8740 |
| humanhash: | eighteen-washington-neptune-chicken |
| File name: | ad8b81f4f8609bf5583c38cb017f8740.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 603'648 bytes |
| First seen: | 2021-12-22 06:30:42 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger) |
| ssdeep | 12288:VeEQyAJCeQeoQYkNLTkveSWOmQXtwK/qACOserp0rcOXPZlVQ/g5CYVV58tGG:VehyAJCe3oQYkNLkGXQrqmhrpq2GG |
| Threatray | 3'362 similar samples on MalwareBazaar |
| TLSH | T14BD4C05CF611B5DFC82BCA36D9742C20AB61E427920FC757A04722AD9C0D6C78E1A9F7 |
| File icon (PE): |  |
| dhash icon | b3b3333969693b3b (69 x Formbook, 63 x AgentTesla, 26 x Loki) |
| 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://jessecoltd.ir/6.jpg | https://threatfox.abuse.ch/ioc/280082/ |
| http://jessecoltd.ir/1.jpg | https://threatfox.abuse.ch/ioc/280083/ |
| http://jessecoltd.ir/2.jpg | https://threatfox.abuse.ch/ioc/280084/ |
| http://jessecoltd.ir/3.jpg | https://threatfox.abuse.ch/ioc/280085/ |
| http://jessecoltd.ir/4.jpg | https://threatfox.abuse.ch/ioc/280086/ |
| http://jessecoltd.ir/5.jpg | https://threatfox.abuse.ch/ioc/280087/ |
| http://jessecoltd.ir/7.jpg | https://threatfox.abuse.ch/ioc/280088/ |
Intelligence
File Origin
# of uploads :
1
# of downloads :
204
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
ad8b81f4f8609bf5583c38cb017f8740.exe
Verdict:
Malicious activity
Analysis date:
2021-12-22 06:32:11 UTC
Tags:
trojan stealer vidar loader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Vidar
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
DNS request
Sending a custom TCP request
Unauthorized injection to a recently created process
Creating a file
Reading critical registry keys
Delayed writing of the file
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Stealing user critical data
Launching a tool to kill processes
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
obfuscated packed
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 Stealer Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
C2 URLs / IPs found in malware configuration
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
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 submitted file
Posts data to a JPG file (protocol mismatch)
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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.Spyware.Noon
Status:
Malicious
First seen:
2021-12-21 13:24:22 UTC
File Type:
PE (.Net Exe)
Extracted files:
10
AV detection:
23 of 27 (85.19%)
Threat level:
2/5
Detection(s):
Suspicious file
Verdict:
malicious
Similar samples:
+ 3'352 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
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
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:
jessecoltd.ir
Unpacked files
SH256 hash:
8f68eae7c5e5af12c01aa9917cb830ad40642ece8e82137425f56515cea357ee
MD5 hash:
a070b231756b394612fae06c767e83a1
SHA1 hash:
7ae280d33543c555fc08f27b5441e21b9ab3c631
SH256 hash:
cc863038dfc58d37276a1f1cb952870d6a2cd81a7ac72d3ed7021e5c5aa1c8f0
MD5 hash:
2c5570f3b591aa1fd57f5ec62ab89b76
SHA1 hash:
7a451b030d1acef0a149e333ba9df225fc5494d1
SH256 hash:
becbc1b05321dc51b2e50fcbb6c2be8da96c2648bebc11638701a69f22b226d8
MD5 hash:
f6b589c57ed54d122c17eace179999e7
SHA1 hash:
712c69f3b4c46d3909f7251b9d2ad7675b00fccd
Detections:
win_oski_g0
win_oski_auto
Parent samples :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 hash:
33a271b57993a4279618294783f95d3634d0358b5030ea48cf9896475e3d8546
MD5 hash:
ad8b81f4f8609bf5583c38cb017f8740
SHA1 hash:
82df0deecb2c8da591a57e0bc5e92922209b5629
Verdict:
Malicious
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: | pe_imphash |
|---|
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| 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.
Web download
Delivery method
Distributed via web download
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