MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b43dde5ca3d23d16af5bf34c522869dff9624a78be67dfc3acde5c81ef24d318. 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: 12


Intelligence 12 IOCs 7 YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b43dde5ca3d23d16af5bf34c522869dff9624a78be67dfc3acde5c81ef24d318
SHA3-384 hash: dcecf1df286079d792abca29d9f1654f69183e89413a43afed8c800b114526a61c28c3ae331d64e96db8082e4ad75f5c
SHA1 hash: 648e3959c35790655ebaddd1bec2902938cdd540
MD5 hash: 1fbf4813a6c6fd9c55e8f8c8beb200f3
humanhash: fruit-may-juliet-pip
File name:Bank account confirmation.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:1'260'032 bytes
First seen:2021-10-17 11:15:47 UTC
Last seen:2021-10-17 12:15:56 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 24576:TWFOBlUXQd4h4RJgaCN2es8nIrJ3hrFxEPw5IMuYU:DB2Ad4acT3IrJhrFxEY5IMuY
Threatray 3'968 similar samples on MalwareBazaar
TLSH T13545DF92C6980211CBA95FB9603B88313B776E697C60FE1C2E997CAB0F733D21457617
File icon (PE):PE icon
dhash icon 4d342169d4d53569 (3 x OskiStealer, 1 x NetWire)
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://secureconnection.xyz/6.jpg

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://secureconnection.xyz/6.jpg https://threatfox.abuse.ch/ioc/234910/
http://secureconnection.xyz/1.jpg https://threatfox.abuse.ch/ioc/234911/
http://secureconnection.xyz/2.jpg https://threatfox.abuse.ch/ioc/234912/
http://secureconnection.xyz/3.jpg https://threatfox.abuse.ch/ioc/234913/
http://secureconnection.xyz/4.jpg https://threatfox.abuse.ch/ioc/234914/
http://secureconnection.xyz/5.jpg https://threatfox.abuse.ch/ioc/234915/
http://secureconnection.xyz/7.jpg https://threatfox.abuse.ch/ioc/234916/

Intelligence

File Origin
# of uploads :
2
# of downloads :
544
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Vidar
Create hunting rule
Link:
https://www.capesandbox.com/analysis/197976/
Detection(s):
SecuriteInfo.com.Trojan.Win32.Save.a.15001.8308.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a file in the %temp% directory
Delayed writing of the file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
evasive obfuscated packed powershell
Link:
https://www.filescan.io/uploads/616c05f7db358dd15ebe2ca9/reports/db90a271-2a3a-4b80-96a0-80c44f1e3dd9/overview
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/5d1dfdb8-e8f4-45e8-a86d-71e74cd5733d
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/871801
Signature
Adds a directory exclusion to Windows Defender
Antivirus detection for URL or domain
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
Performs DNS queries to domains with low reputation
Posts data to a JPG file (protocol mismatch)
Sigma detected: Powershell Defender Exclusion
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: 504229 Sample: Bank account confirmation.exe Startdate: 17/10/2021 Architecture: WINDOWS Score: 100 45 Found malware configuration 2->45 47 Antivirus detection for URL or domain 2->47 49 Yara detected Oski Stealer 2->49 51 10 other signatures 2->51 8 Bank account confirmation.exe 7 2->8         started        process3 file4 31 C:\Users\user\AppData\Local\...\tmp942D.tmp, XML 8->31 dropped 33 C:\Users\user\AppData\Roaming\VWSIPxIbJ.exe, PE32 8->33 dropped 53 Adds a directory exclusion to Windows Defender 8->53 55 Injects a PE file into a foreign processes 8->55 12 Bank account confirmation.exe 196 8->12         started        17 powershell.exe 25 8->17         started        19 schtasks.exe 1 8->19         started        signatures5 process6 dnsIp7 43 secureconnection.xyz 172.67.181.62, 49746, 80 CLOUDFLARENETUS United States 12->43 35 C:\ProgramData\vcruntime140.dll, PE32 12->35 dropped 37 C:\ProgramData\sqlite3.dll, PE32 12->37 dropped 39 C:\ProgramData\softokn3.dll, PE32 12->39 dropped 41 4 other files (none is malicious) 12->41 dropped 57 Tries to harvest and steal browser information (history, passwords, etc) 12->57 59 Tries to steal Crypto Currency Wallets 12->59 21 cmd.exe 1 12->21         started        23 conhost.exe 17->23         started        25 conhost.exe 19->25         started        file8 signatures9 process10 process11 27 taskkill.exe 1 21->27         started        29 conhost.exe 21->29         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b43dde5ca3d23d16af5bf34c522869dff9624a78be67dfc3acde5c81ef24d318/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-10-17 11:16:06 UTC
AV detection:
3 of 45 (6.67%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wq654xfd2i6rnl236ngfekdj374westyxzt57q5m3zoid3ze2mma._file
Verdict:
malicious
Similar samples:
024a5c3d369e1459332682cad7931a426722fdc2ec0950adc598e0227d0ef043
OskiStealer
44aa270e4c081241057bad8c1d0ea5864087325f8e3209aa10747f108123f718
OskiStealer
4ee9983bc82214479876383c1caa6c1800df1d9d9bc733bf0be74150570b12d0
OskiStealer
5ffe71b977866248e55612e20cea0bf3ad51a50896443d791081f58b49cdc5df
OskiStealer
652ff7f52f0e2d6bdd5a0f36f4b24c4dafc8aab7d5236db91b77267650cdb140
OskiStealer
a03b45dabcaf812402454befd876b2eafbdf9e967f3bb01e66f33f3cabbdebd5
OskiStealer
a54ecc8d83199ee37e9af81592b4b3dbc037aaa14eba989f6dc0504a570bcc9c
OskiStealer
a870249216a9fd48fa38faf197c7cad48a16b1c1f0d17f98b9b5de4c1a1b7cfb
OskiStealer
dda5d47308c0ebcb2555cda19b4c05a88d633396909456b9ee5fcee42e197724
OskiStealer
+ 3'958 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer
Link:
https://tria.ge/reports/211017-nc5qvsdddm/
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
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
Malware Config
C2 Extraction:
secureconnection.xyz
Unpacked files
SH256 hash:
5f924d91a36359638e1c2c258cfc1c55b22366de8a51a02c138b5674224d193e
MD5 hash:
a54ecbf56b9236627d9dc3da76129ddd
SHA1 hash:
666f1e3a467bf05efc7b1e387dcafa9253d2f319
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/692c2786-6d6c-4faa-ad1a-25afbe62c5cd/
Parent samples :
b43dde5ca3d23d16af5bf34c522869dff9624a78be67dfc3acde5c81ef24d318
430ac8fe1b764fd7c42a316d36eaf32af003075f617bceb6651aa6be37c6290a
SH256 hash:
bc6d4a17a16372fbf5513832a423fcad58da897d2fe791682c1c256805e238b3
MD5 hash:
6377651e80ec19fe14cdc27b1272af9a
SHA1 hash:
4aa838b0c1e23736c547e0217d18d8ed6e9ae84f
Link:
https://www.unpac.me/results/692c2786-6d6c-4faa-ad1a-25afbe62c5cd/
SH256 hash:
eda4d687b865aed0078ab87078de7d9722888b2d2af71c6fc0dcdc986ffb7567
MD5 hash:
12cf5402be16590c300b442a66e9ebc1
SHA1 hash:
0ea28394d301ca1ce840f039d2da62a5ce6d9334
Link:
https://www.unpac.me/results/692c2786-6d6c-4faa-ad1a-25afbe62c5cd/
SH256 hash:
b43dde5ca3d23d16af5bf34c522869dff9624a78be67dfc3acde5c81ef24d318
MD5 hash:
1fbf4813a6c6fd9c55e8f8c8beb200f3
SHA1 hash:
648e3959c35790655ebaddd1bec2902938cdd540
Link:
https://www.unpac.me/results/692c2786-6d6c-4faa-ad1a-25afbe62c5cd/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/b43dde5ca3d2/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/b43dde5ca3d23d16af5bf34c522869dff9624a78be67dfc3acde5c81ef24d318

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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.

Cape
Cape
https://www.capesandbox.com/analysis/197976/

Comments