MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7. 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: 10


Intelligence 10 IOCs 7 YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7
SHA3-384 hash: fa56eefbf48de53d6f989f7a88161bf8522dd6c4ad715c979ccc4c77f1e93025c74afaed7d1a9c2b5b01d8ceadda5e67
SHA1 hash: a2894d09e5fc6f0a5ee5ec27119b02ecbc2d9a79
MD5 hash: dd6f97becdd24e1c2c1b7662bb3760aa
humanhash: vegan-alanine-oscar-lion
File name:dd6f97becdd24e1c2c1b7662bb3760aa.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:762'880 bytes
First seen:2021-12-01 11:16:49 UTC
Last seen:2021-12-01 12:47:37 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'737 x AgentTesla, 19'595 x Formbook, 12'240 x SnakeKeylogger)
ssdeep 12288:p8YH8hKKbWVb9cQVvn2ivOQqm9X7DN4TrD80kpmaKSG0ptKhl7yPxOC8y3p38m1A:pRHOfbk9ckP+AX7D4D8Ppmahb
Threatray 4'169 similar samples on MalwareBazaar
TLSH T18FF4ADAC7650BADFC81BCD76C9A42C60EA2070BB430BD603A057169DAE0D697DF195F3
File icon (PE):PE icon
dhash icon 261999cbda9be656 (5 x AveMariaRAT, 1 x AsyncRAT, 1 x OskiStealer)
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 :
142
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
dd6f97becdd24e1c2c1b7662bb3760aa.exe
Verdict:
Malicious activity
Analysis date:
2021-12-01 11:20:10 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/d165aa3d-451a-43a5-9ebb-e3aed3e4b6fe

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/210264/
Detection(s):
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.18368.17526.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
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
fareit obfuscated packed
Link:
https://www.filescan.io/uploads/61a759c6852820c591cad231/reports/e05cb5c4-707b-4f43-af49-fa9d74ea616f/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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/af1c1a4f-dc28-498e-aec6-f6a8f33e952b
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/899332
Signature
Adds a directory exclusion to Windows Defender
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
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 dropped file
Machine Learning detection for sample
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: 531810 Sample: TSmtIL1EeJ.exe Startdate: 01/12/2021 Architecture: WINDOWS Score: 100 53 Found malware configuration 2->53 55 Multi AV Scanner detection for submitted file 2->55 57 Yara detected Oski Stealer 2->57 59 11 other signatures 2->59 8 TSmtIL1EeJ.exe 7 2->8         started        process3 file4 35 C:\Users\user\AppData\...\PssjBtDrVeeF.exe, PE32 8->35 dropped 37 C:\Users\...\PssjBtDrVeeF.exe:Zone.Identifier, ASCII 8->37 dropped 39 C:\Users\user\AppData\Local\...\tmp3A27.tmp, XML 8->39 dropped 41 C:\Users\user\AppData\...\TSmtIL1EeJ.exe.log, ASCII 8->41 dropped 61 Detected unpacking (changes PE section rights) 8->61 63 Detected unpacking (overwrites its own PE header) 8->63 65 Uses schtasks.exe or at.exe to add and modify task schedules 8->65 67 2 other signatures 8->67 12 TSmtIL1EeJ.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 51 swsaseguranca.com.br 162.241.203.110, 49759, 80 OIS1US United States 12->51 43 C:\ProgramData\vcruntime140.dll, PE32 12->43 dropped 45 C:\ProgramData\sqlite3.dll, PE32 12->45 dropped 47 C:\ProgramData\softokn3.dll, PE32 12->47 dropped 49 4 other files (none is malicious) 12->49 dropped 69 Tries to harvest and steal browser information (history, passwords, etc) 12->69 71 Tries to steal Crypto Currency Wallets 12->71 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/6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-12-01 11:02:59 UTC
File Type:
PE (.Net Exe)
Extracted files:
12
AV detection:
19 of 28 (67.86%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=nodj3cbfkfwqxf35jacd2hkw2iz546ysqb2la2cwnxbt4d7z7w3q._file
Verdict:
malicious
Similar samples:
192f884438809d6fb01ae0c89c4ccd1fdae62d429e78bdbcc4ff4d28a54049af
OskiStealer
4ee9983bc82214479876383c1caa6c1800df1d9d9bc733bf0be74150570b12d0
OskiStealer
66a1b49f893976a60ca25813345ea54a5582acf7a5a0821c03cc45bcfc89b5c5
OskiStealer
b43dde5ca3d23d16af5bf34c522869dff9624a78be67dfc3acde5c81ef24d318
OskiStealer
b70f4075c4ce52960faacb101aac17a9cd734cbec86b6a9d63944e900420bde1
OskiStealer
c17243e46ff224631e589c55642c3666e5c560715841e8b8ebdd511cb70da8dd
OskiStealer
+ 4'159 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/211201-ndp2ssbfdj/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Checks processor information in registry
Creates scheduled task(s)
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
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:
6df6e31aa11736994ae08f9a979840929c38c8fe1377506d2e5ecc647af534d8
MD5 hash:
e7ecf06932cd076c7787c1d53c8c8030
SHA1 hash:
b4c73ecd037cb8b6a7ccfe9d7893cd4e5818735a
Link:
https://www.unpac.me/results/22745d1e-90d4-4607-b0cc-0fb53f3b91af/
SH256 hash:
b19104b568ca3ddccc2a8d3d10ecddb1ea240171e798dc3a486292cfa14b6365
MD5 hash:
7b0900da932f4ed9630d65b04422736d
SHA1 hash:
6fa340436e3a8e73ae2b3e911f861483183c68ef
Link:
https://www.unpac.me/results/22745d1e-90d4-4607-b0cc-0fb53f3b91af/
SH256 hash:
6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7
MD5 hash:
dd6f97becdd24e1c2c1b7662bb3760aa
SHA1 hash:
a2894d09e5fc6f0a5ee5ec27119b02ecbc2d9a79
Link:
https://www.unpac.me/results/22745d1e-90d4-4607-b0cc-0fb53f3b91af/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/6b869d882551/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/6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7

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.

Web download

OskiStealer

Executable exe 6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1834087/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/210264/

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