MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d5825a48b525fa8f664ff98a98aec5164bbccab0a1bad2d17bb2aafebd148ffa. 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 YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d5825a48b525fa8f664ff98a98aec5164bbccab0a1bad2d17bb2aafebd148ffa
SHA3-384 hash: e9a0b238b712fcc6bb7ecd0f2e84666455e520fd1060ab853baf9dbfa9b8f4a79def854fc32b361b14b94f971bc1607d
SHA1 hash: f60287f0eea71dc8938f37fa4229ea3e92dae3bf
MD5 hash: 149b0568e10ba3994c5c88440221fb2e
humanhash: nuts-salami-muppet-failed
File name:149b0568e10ba3994c5c88440221fb2e.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:261'632 bytes
First seen:2021-04-20 12:03:28 UTC
Last seen:2021-04-20 13:01:30 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 6144:K35ZtfUeAIQHuA36cdrUnpA7WOpDDYH/USK6RywpiBQ:K33eeAItC664a7W0DDg/JEn
Threatray 973 similar samples on MalwareBazaar
TLSH 9D4402807E58C338CA11D976EE3291304690AC0FBD659ADBCC1DBD5FB53068DF9AA436
Reporter abuse_ch
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
2
# of downloads :
99
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Vidar
Create hunting rule
Link:
https://www.capesandbox.com/analysis/139609/
Detection(s):
SecuriteInfo.com.Trojan.Packed2.43029.1038.29273.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Sending a custom TCP request
Sending a UDP request
Creating a file
Creating a file in the %temp% directory
Creating a process from a recently created file
Connection attempt
Deleting a recently created file
Reading critical registry keys
Replacing files
Creating a window
Delayed writing of the file
Running batch commands
Creating a process with a hidden window
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
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.
Result
Threat name:
Unknown
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/689626
Signature
Allocates memory in foreign processes
Downloads files with wrong headers with respect to MIME Content-Type
Found many strings related to Crypto-Wallets (likely being stolen)
Injects a PE file into a foreign processes
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
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
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 393755 Sample: 7Wv8cQT117.exe Startdate: 20/04/2021 Architecture: WINDOWS Score: 100 51 vtqt.xyz 2->51 61 Multi AV Scanner detection for submitted file 2->61 63 Downloads files with wrong headers with respect to MIME Content-Type 2->63 65 Performs DNS queries to domains with low reputation 2->65 67 4 other signatures 2->67 9 7Wv8cQT117.exe 16 7 2->9         started        14 note.exe 14 5 2->14         started        16 note.exe 2 2->16         started        signatures3 process4 dnsIp5 57 yoursite.com 104.21.14.15, 443, 49697, 49730 CLOUDFLARENETUS United States 9->57 59 www.yoursite.com 172.67.133.191, 443, 49696, 49738 CLOUDFLARENETUS United States 9->59 41 C:\Users\user\AppData\Local\note.exe, PE32 9->41 dropped 43 C:\Users\user\AppData\...\7Wv8cQT117.exe, PE32 9->43 dropped 45 C:\Users\user\...\note.exe:Zone.Identifier, ASCII 9->45 dropped 49 2 other malicious files 9->49 dropped 77 Writes to foreign memory regions 9->77 79 Allocates memory in foreign processes 9->79 81 Injects a PE file into a foreign processes 9->81 18 7Wv8cQT117.exe 193 9->18         started        23 7Wv8cQT117.exe 9->23         started        47 C:\Users\user\AppData\Local\Temp\note.exe, PE32 14->47 dropped 83 Multi AV Scanner detection for dropped file 14->83 25 note.exe 14->25         started        file6 signatures7 process8 dnsIp9 53 vtqt.xyz 45.133.1.27, 49724, 49747, 49748 DEDIPATH-LLCUS Netherlands 18->53 55 192.168.2.1 unknown unknown 18->55 33 C:\ProgramData\vcruntime140.dll, PE32 18->33 dropped 35 C:\ProgramData\sqlite3.dll, PE32 18->35 dropped 37 C:\ProgramData\softokn3.dll, PE32 18->37 dropped 39 4 other files (none is malicious) 18->39 dropped 69 Tries to harvest and steal browser information (history, passwords, etc) 18->69 71 Tries to steal Crypto Currency Wallets 18->71 27 cmd.exe 1 18->27         started        73 Multi AV Scanner detection for dropped file 23->73 75 Performs DNS queries to domains with low reputation 23->75 file10 signatures11 process12 process13 29 taskkill.exe 1 27->29         started        31 conhost.exe 27->31         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d5825a48b525fa8f664ff98a98aec5164bbccab0a1bad2d17bb2aafebd148ffa/
Gathering data
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2wbfusfvex5i6zsp7gfjrlwfczf3zsvqug5nful3wkvp5piur75a._file
Verdict:
malicious
Similar samples:
40afa1e323be151d0d7a38c72f771b0b9e909f49ddade942d4260a5e29e5ec2f
OskiStealer
5069de588ac1f23d1cfa14c3ee61e5bc351d0314a5bbac248a5210a9db7e5a8c
OskiStealer
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614ea8187654128fc27a51455ab3c8fdbb6d398382cd4d825cf795dbbf5d7966
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69fe5bb4b975f9437b6c3bcf3f07dc807a8f2e848f1e0c5802012295b06a742c
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b2a66114f2afb03bd4087e7fc37d6c89ff7f3d3bd48d751dc9334a5a746f7c37
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b699a2766f106ff77377780bad431b72ef1748bf989e09f2b82fb73cf30cbde3
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c0ff93ef4930a7dc2d95a6ee490fecdddcbe946e479b1d4fdb47285245b28675
OskiStealer
d217032899487162688fa6c3855e13040b074de38d9c57c91b47c1190842edc2
OskiStealer
d40dedd7f637a1ef9703b582a6d536469d1cf62bddc1a462a9cceeb7f9194f13
OskiStealer
+ 963 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer persistence spyware stealer
Link:
https://tria.ge/reports/210420-g7737lls1x/
Behaviour
Checks processor information in registry
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
Adds Run key to start application
Checks installed software on the system
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
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/d5825a48b525fa8f664ff98a98aec5164bbccab0a1bad2d17bb2aafebd148ffa

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:dsc
Create hunting rule
Author:Aaron DeVera
Description:Discord domains
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:MALWARE_Win_Vidar
Create hunting rule
Author:ditekSHen
Description:Detects Vidar / ArkeiStealer
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
Rule name:win_oski_g0
Create hunting rule
Author:Slavo Greminger, SWITCH-CERT

File information

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

Web download

OskiStealer

Executable exe d5825a48b525fa8f664ff98a98aec5164bbccab0a1bad2d17bb2aafebd148ffa

(this sample)

Cape
Cape
https://www.capesandbox.com/analysis/139609/
  
URLhaus
https://urlhaus.abuse.ch/url/1143663/
  
Delivery method
Distributed via web download

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