MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c76856f53bc950964cb30f0b48e80964b5162660608794d25ee919ce795796ba. 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 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c76856f53bc950964cb30f0b48e80964b5162660608794d25ee919ce795796ba
SHA3-384 hash: c5c3af6d4ae8cc8d58d53388e01d2d1feb686231186bb669bca8b027b052f15f002f50ae602d818d1efc5010d9ac359e
SHA1 hash: 21ee67939e626714aaeaa78d4c6010cbb0e19b7e
MD5 hash: c9626ce54f97b0bc2270eb091952ea53
humanhash: east-early-fillet-illinois
File name:SKBM-240821.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:726'528 bytes
First seen:2021-08-24 00:16:05 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'655 x AgentTesla, 19'464 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 12288:3LJu0WF/vuVlFUlat1mVeAc8CVijLA6s691+U/Ub1XQKAaC0fuke:7Jq8a5exdVijL7191t/UbZC
TLSH T136F4E1AD7650B69FC85BCE728DA85C60E650B477430BE243A81312AEDE0E59BCF151F3
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://try.divendesign.in/6.jpg

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://try.divendesign.in/6.jpg https://threatfox.abuse.ch/ioc/193513/
http://try.divendesign.in/1.jpg https://threatfox.abuse.ch/ioc/193514/
http://try.divendesign.in/2.jpg https://threatfox.abuse.ch/ioc/193515/
http://try.divendesign.in/3.jpg https://threatfox.abuse.ch/ioc/193516/
http://try.divendesign.in/4.jpg https://threatfox.abuse.ch/ioc/193517/
http://try.divendesign.in/5.jpg https://threatfox.abuse.ch/ioc/193518/
http://try.divendesign.in/7.jpg https://threatfox.abuse.ch/ioc/193519/

Intelligence

File Origin
# of uploads :
1
# of downloads :
137
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SKBM-240821.exe
Verdict:
Malicious activity
Analysis date:
2021-08-24 00:16:53 UTC
Tags:
trojan stealer vidar loader
Link:
https://app.any.run/tasks/af78ab74-eed3-425a-a409-40d61b8eb3b5

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/181667/
Detection(s):
SecuriteInfo.com.ArtemisC9626CE54F97.12157.19214.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
Connecting to a non-recommended domain
Connection attempt
Deleting a recently created file
Reading critical registry keys
Replacing files
Delayed writing of the file
Running batch commands
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
Searching for the window
Stealing user critical data
Launching a tool to kill processes
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.
Malware family:
Oski Stealer
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/ede05027-5200-46cd-843e-6435ed4c75e6
Result
Threat name:
Oski
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/837880
Signature
Antivirus detection for URL or domain
Detected unpacking (changes PE section rights)
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for sample
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
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 470311 Sample: SKBM-240821.exe Startdate: 24/08/2021 Architecture: WINDOWS Score: 100 37 Found malware configuration 2->37 39 Antivirus detection for URL or domain 2->39 41 Yara detected Oski Stealer 2->41 43 5 other signatures 2->43 8 SKBM-240821.exe 3 2->8         started        process3 file4 25 C:\Users\user\AppData\...\SKBM-240821.exe.log, ASCII 8->25 dropped 45 Detected unpacking (changes PE section rights) 8->45 47 Injects a PE file into a foreign processes 8->47 12 SKBM-240821.exe 196 8->12         started        17 SKBM-240821.exe 8->17         started        signatures5 process6 dnsIp7 35 try.divendesign.in 142.4.7.91, 49702, 80 UNIFIEDLAYER-AS-1US United States 12->35 27 C:\ProgramData\vcruntime140.dll, PE32 12->27 dropped 29 C:\ProgramData\sqlite3.dll, PE32 12->29 dropped 31 C:\ProgramData\softokn3.dll, PE32 12->31 dropped 33 4 other files (none is malicious) 12->33 dropped 49 Tries to harvest and steal browser information (history, passwords, etc) 12->49 51 Tries to steal Crypto Currency Wallets 12->51 19 cmd.exe 1 12->19         started        file8 signatures9 process10 process11 21 taskkill.exe 1 19->21         started        23 conhost.exe 19->23         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c76856f53bc950964cb30f0b48e80964b5162660608794d25ee919ce795796ba/
Threat name:
ByteCode-MSIL.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2021-08-24 00:16:16 UTC
AV detection:
19 of 46 (41.30%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=y5ufn5j3zfijmtftb4fur2ajms2rmjtamcdzjus65em446kxs25a._file
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer suricata
Link:
https://tria.ge/reports/210824-42lezc72ke/
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:
try.divendesign.in
Unpacked files
SH256 hash:
6912e4bedd1288f116e968f0a79d9797f6d6bd24d45a5f10c52e20f9d33b8c61
MD5 hash:
03bde4a82ad64c0f314985232fbca3fa
SHA1 hash:
e8d0b6339e94192eaaca32c812f914e60576dca6
Link:
https://www.unpac.me/results/f3fc9e58-3066-46dd-aa9e-a084d82a0afd/
SH256 hash:
835b065b62d93451e3b95c95a13c6baf3bad7f77f3b88d6f982830e0ecdde706
MD5 hash:
614f4808cb86fe3c1ceb2f00de5eb8e3
SHA1 hash:
d8695a5786e1b3cb95d5e00ca23ef88932232260
Link:
https://www.unpac.me/results/f3fc9e58-3066-46dd-aa9e-a084d82a0afd/
SH256 hash:
eed7b6a75a58143e8f5e982270f7f8555debec91e6eb04a7e6948d5fc458d9d8
MD5 hash:
89ba5d39b827f01f6c5f99d324ad782f
SHA1 hash:
6af7ef21ccdd59632c7beb65899b959a6d935a22
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/f3fc9e58-3066-46dd-aa9e-a084d82a0afd/
Parent samples :
c76856f53bc950964cb30f0b48e80964b5162660608794d25ee919ce795796ba
83e8782266edec54f4c451f60e2095864c8a9d817e7296076e128c686a6bfea3
SH256 hash:
c76856f53bc950964cb30f0b48e80964b5162660608794d25ee919ce795796ba
MD5 hash:
c9626ce54f97b0bc2270eb091952ea53
SHA1 hash:
21ee67939e626714aaeaa78d4c6010cbb0e19b7e
Link:
https://www.unpac.me/results/f3fc9e58-3066-46dd-aa9e-a084d82a0afd/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/c76856f53bc9/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/c76856f53bc950964cb30f0b48e80964b5162660608794d25ee919ce795796ba

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
Create hunting rule
Author:ditekSHen
Description:Detects Vidar / ArkeiStealer
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
Rule name:Vidar
Create hunting rule
Author:kevoreilly
Description:Vidar Payload
Rule name:win_oski_auto
Create hunting rule
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.

Cape
Cape
https://www.capesandbox.com/analysis/181667/

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