MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 95ef6cecb170f83ee979d30f8f805c1618fc5e3f5a2eee8a9d9ccb8573eb6bdd. 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: 9


Intelligence 9 IOCs 7 YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 95ef6cecb170f83ee979d30f8f805c1618fc5e3f5a2eee8a9d9ccb8573eb6bdd
SHA3-384 hash: b1bf2aafdba09527ef0e07c4a90ccfbdc49a58fa602acfc8d65b87f5a80b4361bdc9211660afc6d88ccf5333421d4268
SHA1 hash: a7011b7460d447496d88389c6f64afba021b439b
MD5 hash: a37690baece6e6cedfa38a5523007bf6
humanhash: yellow-arkansas-muppet-idaho
File name:a37690baece6e6cedfa38a5523007bf6.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:1'523'712 bytes
First seen:2021-05-26 16:55:37 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'604 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:jUMFnluVoXcDLbrXSxIC7ZKPOnmo3Grr5c4l:gMFn4omuxzKP7o2rr5c
Threatray 4 similar samples on MalwareBazaar
TLSH DF65D0C85352B3BBC5D0E2F7006516F433296E95C62DAA97E22DC12018CE97E1AFFD91
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://support121.ddns.net/6.jpg

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://support121.ddns.net/6.jpg https://threatfox.abuse.ch/ioc/64466/
http://support121.ddns.net/1.jpg https://threatfox.abuse.ch/ioc/64467/
http://support121.ddns.net/2.jpg https://threatfox.abuse.ch/ioc/64468/
http://support121.ddns.net/3.jpg https://threatfox.abuse.ch/ioc/64469/
http://support121.ddns.net/4.jpg https://threatfox.abuse.ch/ioc/64470/
http://support121.ddns.net/5.jpg https://threatfox.abuse.ch/ioc/64471/
http://support121.ddns.net/7.jpg https://threatfox.abuse.ch/ioc/64472/

Intelligence

File Origin
# of uploads :
1
# of downloads :
95
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a37690baece6e6cedfa38a5523007bf6.exe
Verdict:
Suspicious activity
Analysis date:
2021-05-26 22:31:44 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/9fbc5618-daa5-4280-9b9f-8ac4d8df12cd

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/162455/
Detection(s):
Win.Packed.Gamarue-6817673-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
DNS request
Creating a file in the %AppData% directory
Connection attempt
Creating a file
Creating a window
Sending a UDP request
Reading critical registry keys
Replacing files
Delayed writing of the file
Running batch commands
Using the Windows Management Instrumentation requests
Searching for the window
Stealing user critical data
Launching a tool to kill processes
Unauthorized injection to a system process
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.
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/792895
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Compiles code for process injection (via .Net compiler)
DLL side loading technique detected
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)
Sample uses process hollowing technique
Sigma detected: Suspicious Csc.exe Source File Folder
Tries to harvest and steal browser information (history, passwords, etc)
Uses dynamic DNS services
Writes to foreign memory regions
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 425297 Sample: NKUKmKULvI.exe Startdate: 26/05/2021 Architecture: WINDOWS Score: 100 67 Found malware configuration 2->67 69 Antivirus detection for dropped file 2->69 71 Antivirus / Scanner detection for submitted sample 2->71 73 9 other signatures 2->73 8 NKUKmKULvI.exe 3 13 2->8         started        process3 file4 45 C:\Users\user\AppData\...\gedc5y1x.cmdline, UTF-8 8->45 dropped 47 C:\Users\user\AppData\Local\...\gedc5y1x.0.cs, UTF-8 8->47 dropped 49 C:\Users\user\AppData\...49KUKmKULvI.exe.log, ASCII 8->49 dropped 75 Writes to foreign memory regions 8->75 77 Allocates memory in foreign processes 8->77 79 Sample uses process hollowing technique 8->79 81 2 other signatures 8->81 12 vbc.exe 193 8->12         started        17 csc.exe 3 8->17         started        19 AcroRd32.exe 39 8->19         started        signatures5 process6 dnsIp7 65 support121.ddns.net 158.101.119.84, 49711, 80 ORACLE-BMC-31898US United States 12->65 51 C:\ProgramData\sqlite3.dll, PE32 12->51 dropped 53 C:\ProgramData\vcruntime140.dll, PE32 12->53 dropped 55 C:\ProgramData\softokn3.dll, PE32 12->55 dropped 59 4 other files (none is malicious) 12->59 dropped 83 Tries to harvest and steal browser information (history, passwords, etc) 12->83 85 DLL side loading technique detected 12->85 21 cmd.exe 1 12->21         started        57 C:\Users\user\AppData\Local\...\gedc5y1x.dll, PE32 17->57 dropped 23 conhost.exe 17->23         started        25 cvtres.exe 1 17->25         started        27 RdrCEF.exe 58 19->27         started        30 AcroRd32.exe 8 6 19->30         started        file8 signatures9 process10 dnsIp11 32 taskkill.exe 1 21->32         started        34 conhost.exe 21->34         started        63 192.168.2.1 unknown unknown 27->63 36 RdrCEF.exe 27->36         started        39 RdrCEF.exe 27->39         started        41 RdrCEF.exe 27->41         started        43 RdrCEF.exe 27->43         started        process12 dnsIp13 61 80.0.0.0 NTLGB United Kingdom 36->61
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/95ef6cecb170f83ee979d30f8f805c1618fc5e3f5a2eee8a9d9ccb8573eb6bdd/
Threat name:
ByteCode-MSIL.Trojan.Tiggre
Create hunting rule
Status:
Malicious
First seen:
2021-05-24 01:16:00 UTC
AV detection:
22 of 29 (75.86%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=sxxwz3frod4d52lz2mhy7ac4cympyxr7lixo5cu5ttfyk47lnpoq._file
Verdict:
suspicious
Similar samples:
2ed58cba6fbba892cde349ea6759ddbe197bcc1adf9c55801b30ccd3d28ec55f
OskiStealer
347ec9d5455536ace4c650476001fb0511d5ea5f734a951b523ade3001472dd4
OskiStealer
7b673f65dfb02aea2b7fe950c749c17a953d2b9514aa78c663aac6c002b6bf6b
OskiStealer
9b322d3c3a5bd842ae2563f5eb2ae4cf7957132311ccf051d7bfeb4601866a33
OskiStealer
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski infostealer spyware
Link:
https://tria.ge/reports/210526-jr4kh4gs8a/
Behaviour
Checks processor information in registry
Kills process with taskkill
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Loads dropped DLL
Uses the VBS compiler for execution
Downloads MZ/PE file
Oski
Malware Config
C2 Extraction:
support121.ddns.net
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/95ef6cecb170f83ee979d30f8f805c1618fc5e3f5a2eee8a9d9ccb8573eb6bdd

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: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:autogenerated rule brought to you by yara-signator

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/162455/

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