MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e447edf7c703f03c3644f4d8b896974b7bfa59e7bc4036af5a800c7135dd09b0. 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


Intelligence 11 IOCs 7 YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e447edf7c703f03c3644f4d8b896974b7bfa59e7bc4036af5a800c7135dd09b0
SHA3-384 hash: d582c668acc5f050c7086b61f27842b501383ce6886c435afa08790df525b88f0ddbb365fbcd91f6365341c0c3b95eab
SHA1 hash: 553c0807cc5b0df4b1a91ff2689636fde8f33d70
MD5 hash: e4833e975ec9a404fe636e8cece99172
humanhash: pluto-paris-harry-winner
File name:e4833e975ec9a404fe636e8cece99172.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:695'296 bytes
First seen:2021-12-02 10:55:09 UTC
Last seen:2021-12-02 13:03:14 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:YPRKUeSQ5l+LM0VMJSd1GYXNJQEqLomOvnO0XoyboIewD21JZcunoKBZuZHsb/ha:MsN54M0VoSd1XXN/qLoTPYaG22jZ9GHk
Threatray 4'279 similar samples on MalwareBazaar
TLSH T1F3E402B0156A8CD0F84ACBF8B11DAB7319B6AD111850C1E51E95FD558E33390EA62FF3
File icon (PE):PE icon
dhash icon f4cccc9cd6dce4f4 (8 x AveMariaRAT, 3 x OskiStealer, 3 x AgentTesla)
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://swsaseguranca.com.br/6.jpg

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
http://swsaseguranca.com.br/6.jpg https://threatfox.abuse.ch/ioc/256801/
http://swsaseguranca.com.br/1.jpg https://threatfox.abuse.ch/ioc/256802/
http://swsaseguranca.com.br/2.jpg https://threatfox.abuse.ch/ioc/256803/
http://swsaseguranca.com.br/3.jpg https://threatfox.abuse.ch/ioc/256804/
http://swsaseguranca.com.br/4.jpg https://threatfox.abuse.ch/ioc/256805/
http://swsaseguranca.com.br/5.jpg https://threatfox.abuse.ch/ioc/256806/
http://swsaseguranca.com.br/7.jpg https://threatfox.abuse.ch/ioc/256807/

Intelligence

File Origin
# of uploads :
2
# of downloads :
157
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
e4833e975ec9a404fe636e8cece99172.exe
Verdict:
Malicious activity
Analysis date:
2021-12-02 10:58:58 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/d67c0d4c-e199-4190-8306-a4a6ff305b32

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/210663/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1125.6236.25729.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
DNS request
Sending a custom TCP request
Сreating synchronization primitives
Launching a process
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a process from a recently created file
Creating a file in the %temp% directory
Unauthorized injection to a recently created process
Creating a file
Running batch commands
Launching a tool to kill processes
Enabling autorun by creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/61a8a64486bf67e7121f9ffd/reports/ad4d7d4e-79fc-47a8-89bd-92ca78ac84e7/overview
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:
Unknown
Link:
https://analyze.intezer.com/analyses/1bd199a3-6335-44b3-97e1-6b618cc76a86
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/900065
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
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)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Sigma detected: Powershell Defender Exclusion
Sigma detected: Suspicius Add Task From User AppData Temp
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
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 532543 Sample: a2SyRyTizn.exe Startdate: 02/12/2021 Architecture: WINDOWS Score: 100 51 Multi AV Scanner detection for domain / URL 2->51 53 Found malware configuration 2->53 55 Multi AV Scanner detection for submitted file 2->55 57 11 other signatures 2->57 8 a2SyRyTizn.exe 7 2->8         started        process3 file4 35 C:\Users\user\AppData\...\oYQmxbAzWBbFl.exe, PE32 8->35 dropped 37 C:\Users\user\AppData\Local\...\tmp287B.tmp, XML 8->37 dropped 39 C:\Users\user\AppData\...\a2SyRyTizn.exe.log, ASCII 8->39 dropped 59 Uses schtasks.exe or at.exe to add and modify task schedules 8->59 61 Adds a directory exclusion to Windows Defender 8->61 12 a2SyRyTizn.exe 8->12         started        17 powershell.exe 25 8->17         started        19 powershell.exe 24 8->19         started        21 schtasks.exe 8->21         started        signatures5 process6 dnsIp7 49 swsaseguranca.com.br 162.241.203.110, 49785, 80 OIS1US United States 12->49 41 C:\ProgramData\vcruntime140.dll, PE32 12->41 dropped 43 C:\ProgramData\sqlite3.dll, PE32 12->43 dropped 45 C:\ProgramData\softokn3.dll, PE32 12->45 dropped 47 4 other files (none is malicious) 12->47 dropped 63 Tries to harvest and steal browser information (history, passwords, etc) 12->63 65 Tries to steal Crypto Currency Wallets 12->65 23 cmd.exe 12->23         started        25 conhost.exe 17->25         started        27 conhost.exe 19->27         started        29 conhost.exe 21->29         started        file8 signatures9 process10 process11 31 conhost.exe 23->31         started        33 taskkill.exe 23->33         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e447edf7c703f03c3644f4d8b896974b7bfa59e7bc4036af5a800c7135dd09b0/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-12-02 10:56:15 UTC
File Type:
PE (.Net Exe)
Extracted files:
10
AV detection:
21 of 28 (75.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=4rd6356hapydynse6tmlrfuxjn57uwphxradnl22qaghcno5bgya._file
Verdict:
malicious
Similar samples:
192f884438809d6fb01ae0c89c4ccd1fdae62d429e78bdbcc4ff4d28a54049af
OskiStealer
66a1b49f893976a60ca25813345ea54a5582acf7a5a0821c03cc45bcfc89b5c5
OskiStealer
6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7
OskiStealer
b43dde5ca3d23d16af5bf34c522869dff9624a78be67dfc3acde5c81ef24d318
OskiStealer
b70f4075c4ce52960faacb101aac17a9cd734cbec86b6a9d63944e900420bde1
OskiStealer
c17243e46ff224631e589c55642c3666e5c560715841e8b8ebdd511cb70da8dd
OskiStealer
+ 4'269 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer suricata
Link:
https://tria.ge/reports/211202-m1ph4sfabn/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
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
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:
swsaseguranca.com.br
Unpacked files
SH256 hash:
621022934fc00b09ca1328002a28c350566cd98f99866cc08d206aa33dc20231
MD5 hash:
dfa18dcf59a6a410b5539e8f25a5c1fd
SHA1 hash:
8367e81b1e2dacff0076a93337f0d3894fcdb28c
Link:
https://www.unpac.me/results/35d28aab-a00c-40d1-b348-b92b5b29540d/
SH256 hash:
1eba3e6e55f4aa87ee88dad11183f808f00870bf6277e3ae19fb31400a1dbe5b
MD5 hash:
00b620728472aef2af115e0455930cf8
SHA1 hash:
649a4ad0f13a3176ea36b855c1b36fbce246446a
Link:
https://www.unpac.me/results/35d28aab-a00c-40d1-b348-b92b5b29540d/
SH256 hash:
e447edf7c703f03c3644f4d8b896974b7bfa59e7bc4036af5a800c7135dd09b0
MD5 hash:
e4833e975ec9a404fe636e8cece99172
SHA1 hash:
553c0807cc5b0df4b1a91ff2689636fde8f33d70
Link:
https://www.unpac.me/results/35d28aab-a00c-40d1-b348-b92b5b29540d/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/e447edf7c703/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/e447edf7c703f03c3644f4d8b896974b7bfa59e7bc4036af5a800c7135dd09b0

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
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

OskiStealer

Executable exe e447edf7c703f03c3644f4d8b896974b7bfa59e7bc4036af5a800c7135dd09b0

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1834087/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/210663/

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